Danfoss EM-PME375 User guide
User Guide
Integrated Motor / Generator
EM-PME375
www.danfoss.com
User Guide
EM-PME375
Revision history Table of revisions
Date Changed Rev
July 2021 Updated user guide 0201
2 | © Danfoss | July 2021 BC265857345808en-000201
User Guide
EM-PME375
Contents
General information
Safety information
Product overview
Design principles
Transportation and storage
Installation
Operation
Maintenance
Intended use of the user guide................................................................................................................................................... 5
Product naming convention ....................................................................................................................................................... 5
Conformity according to standards...........................................................................................................................................6
Warranty.............................................................................................................................................................................................. 6
Terms and abbreviations...............................................................................................................................................................7
Responsibility of the manufacturer........................................................................................................................................... 7
General safety statement...............................................................................................................................................................8
Safety message signal words....................................................................................................................................................... 8
Safety symbols...................................................................................................................................................................................8
Personal protective equipment.................................................................................................................................................. 9
Security features............................................................................................................................................................................... 9
Electromagnetic compatibility (EMC).....................................................................................................................................10
Intended use of the electric machine.....................................................................................................................................12
Used technology............................................................................................................................................................................ 12
System introduction..................................................................................................................................................................... 13
Connections and interfaces........................................................................................................................................................14
Rating plate......................................................................................................................................................................................15
Tightening torques........................................................................................................................................................................17
System design.................................................................................................................................................................................18
Cooling and temperature measurement ........................................................................................................................18
Inverter......................................................................................................................................................................................... 18
Mounting structure....................................................................................................................................................................... 20
Supporting structure requirements...................................................................................................................................20
Shaft alignment and load...................................................................................................................................................... 21
Customer connection interface design instruction..................................................................................................... 22
Transportation................................................................................................................................................................................ 29
Receiving and unpacking............................................................................................................................................................29
Lifting................................................................................................................................................................................................. 29
Storage...............................................................................................................................................................................................31
Extended storage......................................................................................................................................................................31
Required tools.................................................................................................................................................................................33
Insulation resistance test.............................................................................................................................................................33
Mechanical installation................................................................................................................................................................33
Allowed mounting positions................................................................................................................................................33
Mounting the electric machine........................................................................................................................................... 34
Installation procedure.............................................................................................................................................................36
Cooling connections............................................................................................................................................................... 47
Electrical installation.....................................................................................................................................................................48
Power connections.................................................................................................................................................................. 48
High voltage connection..................................................................................................................................................48
Connection diagram.......................................................................................................................................................... 50
Low voltage connections.......................................................................................................................................................50
Grounding connections......................................................................................................................................................... 52
Operation conditions....................................................................................................................................................................56
Condition monitoring during operation...............................................................................................................................56
Recommended coolants............................................................................................................................................................. 56
Emergency operation...................................................................................................................................................................57
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Contents
Regular maintenance................................................................................................................................................................... 58
Cleaning............................................................................................................................................................................................ 59
Cooling system maintenance....................................................................................................................................................59
Dismounting
Troubleshooting
Aftersales
Service policy...................................................................................................................................................................................62
Service parts.....................................................................................................................................................................................62
Disposal
Storage, installation and maintenance checklists
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General information
Intended use of the user guide
Product naming convention
This user guide is the installation, operation and maintenance user guide for the EM-PME375-T150 and
EM-PME375-T200 electric machines.
This user guide contains instructions necessary to safely and properly handle, install, operate and
maintain the electric machine. They should be brought to the attention of anyone who installs, operates
or maintains the machine or associated equipment.
All of the safety warnings and instructions in this user guide must be followed to prevent injury to
personnel or damage to property. Only qualified and authorized personnel, familiar with health and
safety requirements and national legislation, shall be permitted to handle, install, operate and maintain
the device.
This user guide must be kept for future reference during installation, operation and maintenance.
This user guide uses illustrations as examples only. Illustrations in this user guide may not necessarily
reflect all system features.
In this user guide, EM-PME family permanent magnet motors and generators are referred to as the
electric machine.
Frame model indicates dimensions and electrical characteristics of the electric machine. The following
naming convention is used to refer to the electric machine frame model:
EM-PME375-T150-XXXX+XX
•
EM-PME375-T200-XXXX+XX
•
The naming codes of the electric machine
Part of the name Meaning
EM Electric Machine
PMIXXX or PMEXXX Permanent Magnet Internal and a number relative to
the diameter of the electric machine, or Permanent
Magnet External and a number relative to diameter of the
electric machine
TXXXX Average continuous torque of the motor range, relative
to the lenght of the machine
XXXX Rated rotation speed
+XX Options, see option table below. Standard options are
indicated by a star (*).
The power input of the electrical machine requires a three phase power system.
The electric machine can include some of the options available. The options of the electric machine are
shown also in the rating plate, following the frame model code. Note! Only options that differ from the
standard delivery are indicated. Following options are used, see Table below. For detailed information of
the models, options and characteristics, see product data sheets.
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User Guide
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General information
EM-PME375-T150 and EM-PME375-T200 options
Variant Code Description Additional information
High voltage connector * High voltage plug-in
Rotation sensor * None No resolver
Conformity according to standards
The electric machine as partly completed machinery is in conformity with the following other directive(s),
harmonized standard(s) or other normative document(s), provided it/they are used in accordance with
our instructions. As partly completed machinery the product itself does not have declaration of
conformity but instead declaration of incorporation. This partly completed machinery must not be used
before the final machinery into which it is to be incorporated has been declared in conformity with the
Machinery Directive and other relevant directives.
One plug-in connector per phase for 50
connectors for 50 mm
cables
+HVC1 High voltage plug-in
connectors for 35 mm
cables
+RES1 Resolver In-built non contacting resolver, 5-pole
2
mm2 cable
One plug-in connector per phase for
2
35 mm2 cable
pair
Warranty
Applicable Directives and standards
Standard Explanation
Low Voltage Directive
2006/95/EC (until 19.4.2016)
and Low Voltage Directive
2014/35/EU (from 20.4.2016
onwards)
Machinery Directive
2006/42/EC
IEC 60034-1:2010 Rotating electrical machines - Part 1: Rating and performance
IEC 60034-5:2000/A1:2006 Rotating electrical machines - Part 5: Degrees of protection provided by the integral
IEC 60034-6:1991 Rotating electrical machines - Part 6: Methods of cooling
IEC 60034-7:1992/A1:2000 Rotating electrical machines - Part 7: Classification of types of construction,
IEC 60034-8:2007/A1:2014 Rotating electrical machines - Part 8: Terminal markings and direction of rotation
IEC 60034-14:2018 Amendment 1 - Rotating electrical machines - Part 14: Mechanical vibration of
Electrical equipment means any equipment designed for use with a voltage rating
of between 50 and 1000 V for alternating current. This electric machine is subject to
the Low Voltage Directive 2006/95/EC or 2014/35/EC.
This electric machine is partly subject to the Machinery Directive 2006/42/EC and it
is considered as partly completed machinery, as a part of the final machinery.
design of rotating electrical machines (IP code) - Classification
mounting arrangements and connection box position (IM Code)
certain machines with shaft heights 56 mm and higher - Measurement, evaluation
and limits of vibration severity.
Danfoss offers warranty against defects in workmanship and materials for its products for a period of
twelve (12) months from commissioning or eighteen months (18) from delivery (Incoterms-EXW),
whichever occurs first.
In order for the warranty to be valid, the customer must follow the requirements of this and all related
documents, especially those set out in the product installation and maintenance, as well as the applicable
standards and regulations in force in each country.
Defects arising from the improper or negligent use, operation, and/or installation of the equipment, nonexecution of regular preventive maintenance, as well as defects resulting from external factors or
equipment and components not supplied/recommended by Danfoss, will not be covered by the
warranty.
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General information
Terms and abbreviations
The warranty will not apply if the customer at its own discretion makes repairs and/or modifications to
the equipment without prior written consent from Danfoss.
The symbols, terms and abbreviations in the Tables below are possibly used in this manual.
Symbols
Symbol Variable Unit
U Rated voltage (phase-to-phase AC) V
I Rated current (AC) A
P Rated Power (S1) kW
T Rated torque (S1) at rated speed Nm
T
max
n Rated speed rpm
Max n Maximum speed rpm
f Rated supply frequency at nominal speed Hz
PF Power factor (cosφ)
Q
c
T
c
T
amb
RES_COS Cosine signal received from the resolver deg
RES_SIN Sinusoidal signal received from the machine resolver deg
GND Ground in electrical connections
Ω (Ohm) Resistance Ω
Maximum torque Nm
Rated coolant liquid flow l/min
Rated coolant liquid input temperature °C
Rated ambient temperature °C
rms
rms
Term / abbreviation
Term/ Abbreviation Explanation
Resolver Rotation meter in electric machines, used for measuring degrees of rotation
AC Alternating current
DC Direct current
PMSM Permanent Magnet Synchronous Machine
SRPM Syncronous Reluctance assisted Permanent Magnet
S1 Duty type according to the IEC60034; Continuous running duty
S9 Duty type according to the IEC60034; Duty with non-periodic load and speed variations
Responsibility of the manufacturer
Danfoss is responsible for the safety, reliability and performance of the electric machine only if:
•
Handling, mounting, installation, operation and maintenance are done by qualified and authorized
personnel.
•
The installation of the system complies with the requirements of the appropriate regulations.
•
The electric machine is used in accordance with the instructions in this user guide.
•
The electric machine is installed, maintained and serviced in accordance with the instructions in this
user guide.
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Safety information
General safety statement
Safety message signal words
•
The electric machine is intended for use as a component for industrial and commercial installations.
The end product containing the electric machine must conform with all related regulations.
•
The use of the electric machine is prohibited in hazardous areas unless it is expressly designed for
such use.
•
The electric machine is intended for installation, use and maintenance by qualified personnel, familiar
with health and safety requirements and national legislation. Ignoring these instructions may
invalidate all applicable warranties.
•
These instructions must be followed to make sure of safe and correct installation, operation and
maintenance of the electric machine. They should be brought to the attention of anyone who installs,
operates or maintains the electric machine or associated equipment.
•
High voltage and rotating parts can cause serious or fatal injuries. For electric machine covered by
this user guide, it is important to observe safety precautions to protect personnel from possible
injury.
Safety message signal words indicate the severity of a potential hazard.
DANGER Indicates an imminently hazardous situation which, if not avoided, will result in death or serious
injury.
WARNING Indicates a potentially hazardous situation which, if not avoided, could result in death or
serious injury.
CAUTION Indicates a potentially hazardous situation which, if not avoided, may result in minor or
moderate injury. CAUTION may also alert against unsafe practices.
NOTICE Indicates a potentially hazardous situation which, if not avoided, could result in property
damage.
Safety symbols
The following safety and information related symbols appear in this user guide and on the electric
machine.
Danger
This symbol is identified by a yellow background, red octagonal band and a black STOP text.
It indicates a hazardous situation that causes severe injury or death. Action indicated by this
symbol may not be executed.
General warning
This symbol is identified by a yellow background, black triangular band, and a black
exclamation point symbol. It indicates a general potentially hazardous situation.
Electric shock warning
The symbol is identified by a yellow background, black triangular band, and a black
arrowhead symbol. It indicates dangerous electrical voltage that could cause an electric shock
to a person.
Burn warning
The symbol is identified by a yellow background, black triangular band, and a black wavy
lines symbol. It indicates a hot device that could cause burns to a person.
The symbol also indicates that the device should be placed and installed so that contact with
its potentially hot surface is not possible.
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Safety information
Magnet warning
The symbol is identified by a yellow background, black triangular band, and a black magnet
symbol. It indicates strong magnetic field that could cause harm to a person or property.
Rotating shaft warning
The symbol is identified by a yellow background, black triangular band, and a black rotating
shaft symbol. It indicates strong rotating shaft that could cause harm to a person or property.
General Information.
Read the instructions in the user guide.
Personal protective equipment
Personal protective equipment shall be used when necessary during handling, installation and
maintenance of the electric machine to avoid injury.
Use eye protective equipment like safety goggles or mask when you work with the electric
machine. Permanent damage to the eye could be caused if bearing grease, melted nitrile
rubber (radial lip seal), glycol or other fluids splash.
Use hearing protective equipment when you work on the electric machine. Hearing injuries
can be caused by too loud noise (noise in excess of 85 dBA).
Use head protective equipment like helmet when you lift the electric machine! Head injuries
can be caused by object impact.
Use cut resistant gloves when you handle and maintain the electric machine. There is a risk of
cut injuries.
Use protective footwear when you lift or move the electric machine! Foot injuries could be
caused if lifting system or lifting brackets fail.
Security features
The electric machines have at least three PT100 temperature sensors in the windings. The amount of the
sensors depend on the options chosen. The temperature signal(s) can be read out from the measurement
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Safety information
connector of the electric machine. You can connect the temperature signal to the temperature
surveillance pin in the inverter (EC-C) and make sure that the inverter has the temperature protection
feature of the electric machine activated.
Electromagnetic compatibility (EMC)
EMC stands for Electromagnetic compatibility. It is the ability of electric equipment to operate without
problems within an electromagnetic environment. Likewise, the equipment must not disturb or interfere
with any other product or system within its locality. This is a legal requirement for all equipment taken
into service within the European Economic Area (EEA).
Our products are designed with high standards of EMC in mind. Connect the power lines and groundings
along the instructions in this user guide to achieve the required level of EMI protection.
It is the responsibility of the installer to make sure that the equipment or system into which the product is
incorporated complies with the EMC legislation of the country of use. Within the European Union,
equipment into which this product is incorporated must comply with the EMC Directive 2014/30/EU.
When interfacing other equipment, connect only equipment that are specified as part of the
system and that are compatible.
Magnetic and electromagnetic fields generated near the current-carrying conductors and
permanent magnets in electric machines represent a health danger to persons with heart
pacemakers, metal implants and hearing aids. Persons with a heart pacemaker, metal
implants or hearing aids must consult a doctor before they enter the following areas:
•
Areas in which electric equipment and parts are operated
•
Areas in which electric equipment with permanent magnets are stored, mounted,
operated or repaired
If necessary, perform a special electromagnetic compatibility (EMC) test on the installation.
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Product overview
The electric machine is not a complete machine as such, but it must be integrated to another
system. This requires more work and planning than normal electric machine does.
For harsh conditions, like salty air in marine applications, it is recommended to check the
surface treatment possibilities with the factory.
The electric machines have been developed especially for heavy duty, marine and transportation
applications. They are more reliable, smaller, lighter and more efficient than conventional products on
the market.
Typical applications of the electric machines are:
Motor (electric propulsion) and generator for hybrid marine vessels or mobile work machine and bus
•
parallel hybrid applications.
Traction motor and generator for electrical or hybrid electrical mobile work machines or buses.
•
The electric machines feature Synchronous Reluctance assisted Permanent Magnet (SRPM) motor
technology, having several advanced features:
Extremely compact and robust structure.
•
High efficiency throughout the operation range.
•
Liquid cooling with water/glycol mixture.
•
Low coolant flow required.
•
High allowed coolant temperature.
•
Possibility for IP65 enclosure class to maximize reliability.
•
Multiple mounting possibilities.
•
Extended speed and torque capabilities compared to standard PM machines.
•
Machine structure designed to be able to produce high starting torques (instant torque to non-
•
moving wheel).
Optimized speed range to meet most common gear ratios used in heavy mobile machinery.
•
The electric machine
The integrated electric machines have several frame models (sizes) to be the optimal solutions for several
applications. These are T150 and T200 frames. The electric machines also have options for temperature
sensors.
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Product overview
Intended use of the electric machine
This electric machine is intended to be used as a motor or generator and as a part of a machinery, for
example in:
Power train of a marine vessel, transportation vehicle or a heavy duty work machine.
•
Power generation equipment.
•
In a power generation equipment the electric machines are intended to be powered by a prime mover,
for example, an internal combustion engine and controlled by the above mentioned electric power
inverter.
The electric machine is solely intended for professional use, and may be operated only by trained
professionals. The maintenance of the electric machine may be done only by trained professionals.
Forbidden use of the electric machine
It is forbidden to use, handle and maintain the machine in following ways (including but not limited to):
•
Using the electric machine for other purposes than defined in this user guide.
•
Disregarding the obligation to comply with the user guide, safety signs and rating plate of the electric
machine.
•
Using the electric machine, making adjustments and maintenance without first reading this user
guide.
•
Exceeding the designed limits during the electric machine operation.
•
Using non-original service parts of wrong material causing corrosion problems and mechanical
failures in time.
•
Operating and performing maintenance for the electric machine without appropriate personal
protective equipment.
•
Using electric machine parts like frame, shaft end or terminal box for climbing or for support for other
structures.
•
Causing any kind of impact forces to the electric machine (for example hitting or hammering or
dropping objects).
•
Operating the electric machine with electric connections other than defined in the user guide and/or
other documents.
•
Operating the electric machine with insufficiently tightened connections or cable glands.
•
Operating the electric machine with power cables routed against the instructions.
•
Operating the electric machine without properly dimensioned and operating cooling system.
•
Operating the electric machine without following the bearing lubrication instructions.
•
Touching the connection terminal of the electric machine or doing maintenance or adjustment
operations on the electric machine with the electricity connected.
•
Touching the connection terminal if the rotor can be turned by an external prime mover.
•
Lifting the electric machine from wrong lifting points and without correct lifting equipment.
•
Lifting additional load with the machine.
•
Storing the electric machine outdoors in wet or dusty conditions.
•
Storing the electric machine without correct support to prevent rolling or falling of the machines.
•
Using the electric machine in potentially explosive environment.
•
Allowing dirt or liquid to enter into the electric machine or connection box.
•
Using cables that cannot withstand the maximum currents of the electric machine.
Used technology
This electric machine is a Synchronous Reluctance assisted Permanent Magnet (SRPM) machine. This
technology has several benefits compared to standard permanent magnet (PM) technology and
traditional induction machine (IM) technology. The SRPM technology combines the benefits of PM and
Synchronous Reluctance technology, having increased torque capability over wide speed range and
ability to produce torque to higher speeds. The machine efficiency at lower speeds is also good.
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Product overview
The supply current to the stator windings create rotating magnetic field, which in turn rotates the rotor
containing permanent magnets. In the synchronous permanent magnet machine, the rotation of the
rotor (shaft) is synchronized with the frequency of the power supply current. The reluctance technology
maximizes the pull-out torque of the machine.
The permanent magnets of the rotor are of salient-pole design, having embedded permanent magnets in
the rotor structure. This structure makes the machine mechanically more stable and capable of higher
speed operations. See Figure below illustrating the magnet topology of the electric machine. The Figure
shows the principle only, and is not an exact illustration of the structure.
System introduction
Machine topology
1 Electric machine stator and stator windings
2 Electric machine rotor
3 Permanent magnets in the rotor
Danfoss provides electric drive trains for applications in heavy mobile work machines, marine vessels and
buses. The drive trains include all essential components from converting from traditional to hybrid
electric (HEV) or electric vehicle (EV) solutions. Danfoss technology saves fuel and lowers emission and
noise levels.
Overview of the Danfoss drive train system
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Product overview
The electric machines are liquid cooled with water/glycol mixture. For more information, see
Chapter Cooling connections.
A low voltage measurement signal connector is attached to the electric machines. Different temperature
and resolver signals can be read, depending on the machine options chosen. For more information about
the connection, see Chapter Low voltage connections.
The electric machines (some models) can be equipped with one or two anti-condensations heater(s),
depending on the machine type and the option chosen. The heater is used to prevent any water
condensing inside the machine enclosure.
Overview of electric machine system
Connections and interfaces
The electric machines are connected mechanically and electrically as a part of a machinery or as a part of
a power generation equipment.
Mechanical interfaces:
Lifting points.
•
Flange mounting (D-end and N-end).
•
Cooling system connections (bores).
•
Air ventilation plug.
•
Electrical interfaces:
Power connections.
•
Measurement connections.
•
Low voltage (measurement signal) grounding connection.
•
Power grounding connection.
•
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Product overview
Connections and interfaces
Rating plate
1 Power connections
2 N-end flange mounting
3 Low voltage connector (measurement connector), including low voltage grounding connector
4 Lifting points
5 Cooling system connections (bores)
6 D-end flange mounting
7 Air ventilation plug
Each electric machine has a rating plate which can be found on the machine frame. The rating plate
contains machine rating and identification. The rating values in the Figure below are not correct for this
machine. See the rating plate on the machine and data sheets for the correct values.
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Product overview
Rating plate
Rating plate fields
Field Explanation Unit
1 Electric machine product family: EM-PMI or EM-PME
2 Electric machine type code and options
Serial No. Serial number
U Rated voltage V
I Rated current (AC) I
n Rated speed rpm
PF Power factor
f Rated supply frequency at nominal speed Hz
Q
c
Pole pairs Number of magnetic pole pairs of the machine
T
c
Mounting Allowed mounting position according to IEC60034-7
Mass Mass of the electric machine kg
Duty Defined rotating electric machine duty cycles by IEC60034-1 standard
T
amb
IP rating Enclosure class according to IEC60034-5
Cooling Cooling method according to IEC60034-6
Rotation Direction of rotor rotation with default phase order. Observed facing the D-end.
Max n Maximum rotation speed rpm
Insul. class Temperature rating (class) of insulation of the electric machine according to IEC60034-1
Temp. class Temperature rating (class) of individual insulation materials of the insulation according to
Rated coolant liquid flow l/min
Rated coolant liquid input temperature °C
Rated ambient temperature °C
IEC60034-1
rms
rms
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Product overview
Tightening torques
Rating plate fields (continued)
Bear. / D-end Bearing type (types) in the D-end of the electric machine
Bear. / N-end Bearing type in the N-end of the electric machine
Max. pressure Cooling liquid max pressure
CE Depending on the details of the delivery, the rating plate might not have CE-marking
Tightening torque tolerance is +/- 5% of the specified tightening torque.
Use threadlocking adhesive for RST bolts.
Do not install dry screws or other fastening equipment.
Add suitable lubrication, for example Wuerth HSP 1400, to prevent excess friction.
Tightening torques to use unless otherwise noted
8.8 10.9 12.9
Thread Nm Nm Nm
M5 7 10 11
M6 11 17 19
M8 27 40 47
M10 54 79 93
M12 93 137 160
M14 148 218 255
M16 230 338 395
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Design principles
System design
This Chapter describes design principles that must be taken into account when designing the system
using the electric machine.
Cooling and temperature measurement
Do not operate the electric machine without correctly dimensioned and operating cooling
system.
Mount the electric machine in correct position, see Chapter Allowed mounting position.
When you connect the cooling system make sure that the cooling medium flows freely in and
out from the electric machine with the cooling medium flow equal or higher than rated.
The cooling medium temperature at the inlet of the electric machine must be lower or equal
to the rated temperature.
See more detailed information about coolant connection bore specifications, required coolant liquid flow
and other specifications in the product data sheet. Rated values can be found from the electric machine
rating plate.
The electric machine has at least one PT100 temperature sensor in the windings. The amount of the
sensors depend on the options chosen. The temperature signal(s) can be read out from the measurement
connector of the machine.
You can connect one temperature signal to the temperature surveillance pin in the inverter (EC-C1200)
and make sure that the inverter has the machine temperature protection feature activated.
The maximum allowed winding temperature of the electric machine is shown in the rating plate and in
the data sheet.
The PT100 temperature sensor characteristics are: resistance 100 Ω at 0 ºC temperature, and the
resistance increases 0.385 Ω per each 1 ºC increase of temperature.
Inverter
The electric machine is intended to be powered and controlled with an inverter capable of supplying
three-phase alternating current and that is capable of controlling the electric machine. The electric
machine is not suitable for direct online use.
If the electric machine is driven with an inverter from a supplier other than Danfoss Editron, the electric
machine performance may differ from rated values. The optimum performance of the electric machine is
obtained with Danfoss Editron inverters. These inverters are:
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Design principles
•
Compact and light.
•
Liquid cooled.
•
Tolerant to high mechanical vibration (10 G) and shock (50 G).
•
Efficient, efficiency > 98 %.
•
Reliable, no moving components.
Do not exceed the maximum rotation speed of the electric machine.
EC-C1200
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L1
L2
U
V
W
-
-
L3
DC +
+
+
DC -
AUX DC +
AUX DC -
User Guide
EM-PME375
Design principles
Schematic of the inverter powerstage
Mounting structure
The main machine power driving parameters are shown in the machine rating plate. For more
information, contact Danfoss representative.
You can connect one of the temperature signals (from the low voltage connector) to the temperature
surveillance pin in the inverter and make sure that the inverter has the machine temperature protection
feature activated.
Supporting structure requirements
Do not install the electric machine near or in direct contact with easily flammable materials.
The surface of the electric machine can be hot.
The mating housing arrangement of the electric machine must be secure and sufficiently rigid to prevent
vibrations and mechanical failures. Necessary actions should be taken to avoid corrosion on the mating
housing arrangement.
The supporting structure for the electric machine must be such that the electric machine can be
mounted using its allowed mounting positions, see Chapter Allowed mounting positions.
The mounting space must be adequate for the electric machine mounting and possible auxiliary
components. See the length and the diameter data of the electric machine from the product drawing.
Main dimensions of the electric machine are shown in the Figure below (the illustration may differ from
the actual electric machine).
The electric machine has a SAE 3 flywheel housing in N-end. The D-end has a circle of bolt holes for
fastening. See specific installation instructions.
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Design principles
Main dimensions of the electric machine
Symbol Explanation
L
F
D
M
D
S
D
R
Length of the electric machine frame.
Diameter of the flange mounting bore circle.
Diameter of the mounting shoulder.
Diameter of the rotor connection interface.
For all dimensions of the electric machine, see the product drawings.
Shaft alignment and load
Improper alignment (misalignment) may result in bearing overloads, premature bearing
failures, vibrations and shaft failures. Flexible coupling does not compensate for excessive
misalignment.
Alignment between the shaft and mating structure must be accurate.
The misalignment can be parallel or angular misalignment, or combination of those. With parallel
misalignment, the center lines of both shafts are parallel but they are offset. With angular misalignment,
the shafts are at an angle to each other. Figures below illustrate the parallel and angular misalignment.
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Danfoss | July 2021 BC265857345808en-000201 | 21
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