MTS Systems TBF-R User Manual
Pulse Width Modulated
4-Quadrant Servo Controller
Series TBF -R Installation Manual
For electronic commutated servo motors
2101 North Broadway
New Ulm, MN 56073
0199 Telephone: 507-354-1616
©MTS Automation 1999 Fax: 507-354-1611
Important!
Reading these instructions prior to start-up is absolutely necessary.
Dear customer,
The following items and the “Safety Instructions” are for your benefit and are designed to
protect the amplifier from damage caused by incorrect use. According to the product
liability law, everyone who puts a product which constitutes a risk for life and limb into
circulation is obligated to provide safety instructions. These instructions should be clearly
defined and should have an informative nature.
To assist you during installation, consider the following points:
• Protect the amplifier from aggressive and electrically conductive media. These may
lead to a malfunction or destruction of the amplifier!
• Do not touch live parts. There is a risk of fatal injury!
• Trained personnel who are knowledgeable of the safety instructions must carry out
installation, connection and set -up.
• Performance and capabilities of the drive can only be guaranteed under proper use.
• Modifications, which are not authorized by MTS Automation - Custom Servo Motors,
as well as operation of the amplifier in a manner other than its intended use will void
any warranty or liability.
• Our "Terms and Conditions" are the basis for all legal transactions.
2
Table of Contents
Page
1 Safety Instructions.....................................................................................................................1
1.1 General notes ............................................................................................................................ 1
1.2 Qualified personnel.................................................................................................................... 1
1.3 Designated use..........................................................................................................................1
1.4 Description of symbols and signal words .................................................................................1
1.5 Safety notes...............................................................................................................................2
1.6 Set-up........................................................................................................................................ 2
1.7 Maintenance / Service...............................................................................................................3
2 Technical description................................................................................................................ 4
2.1 General information...................................................................................................................4
2.2 Technical data...........................................................................................................................5
2.3 Principle of the amplifier ............................................................................................................ 6
2.4 Block diagram............................................................................................................................ 7
2.5 Function description..................................................................................................................8
2.6 Function as current controller ..................................................................................................11
2.7 List of possible adjustments and indicators ............................................................................ 12
2.8 Front view ................................................................................................................................ 14
3 Connection of the device .......................................................................................................15
3.1 Pin assignment........................................................................................................................ 15
3.2 Explanation of the pin assignment...........................................................................................16
3.3 Wiring.......................................................................................................................................21
3.4 Connection diagrams ..............................................................................................................23
3.5 Measures for an installation in compliance with the EMC directives ......................................25
4 Set -up ........................................................................................................................................ 27
4.1 Connection...............................................................................................................................27
4.2 Presetting.................................................................................................................................27
4.3 Switching on and configuration ................................................................................................ 28
5 Optimizing the controller response ......................................................................................30
5.1 Amplification setting of the current regulators.........................................................................30
5.2 Alternating current amplification of the speed controller.........................................................30
5.3 Tachometer filtering.................................................................................................................30
5.4 Integral-action component of the speed controller..................................................................31
5.5 Direct voltage amplification of the speed controller.................................................................31
5.6 Derivative-action component in the tachometer feedback......................................................31
6 Troubleshooting.......................................................................................................................32
7 Options......................................................................................................................................34
7.1 Ballast circuit ...........................................................................................................................34
7.2 Bus boards ..............................................................................................................................35
8 APPENDIX .................................................................................................................................42
8.1 Dimensional drawing...............................................................................................................42
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List of Figures
Figure 1: Principle of the amplifier, D0140A.dsf.......................................................................6
Figure 2: Block diagram, D0158A.dsf........................................................................................7
Figure 3: Jumper setting, PC-TBF/2.plt....................................................................................11
Figure 4: Front views, FRONTS_TBFR.dsf..............................................................................14
Figure 5: Connection diagram (minimum connection), D0159B.dsf .....................................23
Figure 6: Connection diagram TBF -R, ED0160D.dsf............................................................ 24
Figure 7: Installation in compliance with the EMC directives, D0026B.dsf..........................26
Figure 8: Pin assignment - 19ì sub-rack, TBF_MZ.dra .........................................................36
Figure 9: Connection diagram TBF -R/BUS-S, ED0161C.dsf...............................................37
Figure 10: Connection diagram TBF-R/BUS-W, ED0087D.dsf ............................................38
Figure 11: Pin assignment - wall mounting, TBFWB_MZ.dra................................................39
Figure 12: Bus board TBF/BUS WE, BUSWE_MZ.dra........................................................41
Figure 13: Dimensional drawing TBF60/5, TBF-MZ3.dra......................................................42
Figure 14: Dimensional drawing TBF60/10, TBF-MZ2.dra....................................................43
Figure 15: Dimensional drawing TBF120/7, TBF-MZ1.dra....................................................44
Figure 16: Components inserted - upper side, TBF_BCR2.dra............................................ 45
Figure 17: Components inserted, lower side, TBF_BSR2.dra..............................................46
Figure 18: Components on lower side, RES3BSR1.dsf ........................................................ 47
Figure 19: Components on upper side, RES3BCR1.dsf.......................................................47
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1 Safety Instructions
1.1 General Notes
This start-up manual describes functions and gives all necessary information for the
designated use of the subassemblies produced by Custom Servo Motors. The
manufacturer is responsible for the preparation of an instruction manual in the national
language of the end user. The preparation of machine-specific risk analyses is also the
manufacturer's duty.
Observance and understanding of the safety instructions and warnings stated in this
document is the condition for the riskless transport, installation and set -up of the
components by qualified personnel.
1.2 Qualified Personnel
Must be able to correctly interpret and realize the safety instructions and warnings.
Furthermore, the personnel entrusted must be familiar with the safety concepts of the
automatization technique and must be trained accordingly. Unqualified actions at the
subassemblies or the non -observance of the warnings stated in this document or attached
to the subassemblies, constitute a risk to life and limb of the user, or cause damage to the
machine or other material property.
1.3 Designated Use
is given when:
• any work on equipment of the machine/plant is carried out by a skilled electrician or by
instructed persons under the supervision and guidance of a skilled electrician.
• the machine/pl ant is used only when in a safe and reliable state.
• the machine is used in accordance with instructions set out in the operating manual.
1.4 Description of symbols and signal words
DANGER!
Warning against risk of serious injuries. Observance is absolutely
necessary.
ATTENTION!
Information, the non -observance of which may lead to substantial damage
!
to material property. Observance of these safety instructions is absolutely
necessary.
IMPORTANT!
This symbol refers to an information, important with regard to the use of the
machine. Non -observance may lead to troubles.
1
1.5 Safety Notes
As the subassemblies are intended for installation in machines, freely
accessible parts may carry dangerous voltage. The manufacturer must
ensure adequate protection against contact.
Only qualified personnel, who knows the contents of these start-up
instructions, must execute any work on these subassemblies.
The instructions contained in this manual have to be observed strictly, as
a wrong handling causes additional risks.
A correct transport, storage, set -up and assembly of the machine as well
as careful operation and maintenance is an important condition for the
!
correct and safe operation of these products.
1.6 Set-up
The relevant safety and accident prevention regulations for the individual
case are to be considered.
Devices, intended for installation in cabinets and housings must be
operated only in built-in state.
Prior to setting up the devices, which are operated with line voltage,
please check that the adjusted nominal voltage range is identical to the
local line voltage.
For supply with 24V ensure that the low voltage is mechanically
separated from the mains.
Deviations in the line voltage, exceeding the tolerances stated in the
technical data for these devices, are not allowed, as this may lead to
dangerous conditions.
Voltage dip or voltage failure requires precautions for restoring an
interrupted program. Arising of dangerous operational states must be
avoided.
EMERGENCY-STOP equipment must not effect an uncontrolled or
undefined restart after unlocking. They must remain effective in all modes
of operation.
2
1.7 Maintenance / Service
For measuring or test work on any live device, please observe the relevant accident
prevention regulations. The work must be done only with suitable measuring instruments
and tools.
Service work on subassemblies is done exclusively by Custom Servo
Motors staff.
Incorrect repair work by unqualified persons may lead to damage to
material property, and bears a risk of injuries or mortal injuries. Open the
main switches or unplug the main plug before opening the device or pulling
it out of the sub-rack. When replacing defective fuses, please observe the
stated electrical values. Incorrect modification s and work on the
subassemblies lead to a loss of warranty claims and involves unpredictable
risks.
3
2 Technical description
TBF
60
/ 5
R
2.1 General Information
The series R amplifiers (= resolver) are servo amplifiers for speed control of brushless
servo motors. They extract the information for the sine commutation of the motor and for the
speed feedback from the signals of the resolver, attached to the motor. In addition to that,
incremental encoder signals are simulated by these signals. This allows the realization of
favorable solutions for a large range of applications with low and medium power levels.
The amplifiers work with a pulse-width modulated power amplifier in MOSFET technique.
The design is a 3 HE (Euroformat) for 19" slide-in racks. These devices hav e an integrated
power supply unit. The electronics is supplied internally from the intermediate circuit
voltage, which also allows a battery -powered operation.
The main characteristics are:
• Sine commutation
• Hybrid technique/ SMD technology
• 19 inch/3HE slide-in technique
• Internal power supply unit
• High dynamics
• High efficiency
• Almost no clock noise by doubling of the current frequency
• Short-circuit proof and ground contact proof
• Protective circuit: Undervoltage, overvoltage, overcurrent, overheating
• I2t current limiting
• Differential amplifier input
• Enable input
• External current limiting
• Limit switch inputs
• PLC compatible inputs
• Incremental encoder simulation
Type code:
Series Nominal voltage Nominal current Feedback with: R = Resolver
(Optional T = Tachometer generator and
I = Incremental encoder is
separated define.
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2.2 Technical Data
min.
Series TBF60/5R TBF60/10R TBF120/7R
Nominal voltage 60V 60V 120V
Nominal current (peak value) 5A 10A 7A
Pulse current (peak value) 15A 25A 18A
Intermediate circuit voltage max. 85VDC 85VDC 170VDC
25VDC 25VDC 70VDC
Recommended transformer voltage 54 AC 54VAC 95VAC
Ballast circuit – – internal
Electronic supply internal
Efficiency 93%
Residual voltage drop (nominal current) 1.5V
Clock frequency 9.5kHz
Frequency of the current ripple 19kHz
Current regulator bandwidth 1kHz
Minimum load inductance (nominal current)
Auxiliary voltage for external consumers
Set value input (differential amplifier)
Internal resistance
Control inputs Enable, Pos. -, Neg.Stop, Integral-off
Internal resistance
Input Ext. Current limit.. 0-10V for 0-15A 0-25A 0-18A
Internal resistance 20 kOhm
Incremental encoder outputs A+, A -, B+, B, I+, I -
Electronic commutation Resolver
Resolver 2 Pole, Primary : Rotor
Output conditioned tachometer voltage operation amplifier output
Scaling 10V/6000 rpm
I2t message output ≥ 12V with ≤ 20mA
Operational output potential free relay contact
Connections 1x plug-type connector DIN 41612-F48
Dimensions 160x100x40.3
Weight 0.5kg 0.8kg 1.0kg
*= external ventilation with Ieff > 4A additional filtering with Ieff > 4A or IIMP > 12A.
Ieff= 4A and IIMP= 12A is adjustment ex factory
1.2mH 0.8mH 1.6mH
RS422
transformation Ratio 0.5
input voltage 7V rms; 10kHz
external load >10kOhm!
Only short shielded lines!
max. 10W for 100V, 100mA
1x D-SUB 9-pole socket
mm
160x100x55.5mm
mm
160x100x80.8
mm
5
2.3 Principle of the Amplifier
Current Controlle
r
The three-phase servo amplifiers of Series TBF are based on the principle of the speed
control with secondary current control loop. In addition to that the current-mode logic
controls the commutation of the electronically commutated servo amplifier (bru shless). The
signal flow of this functional group is shown in the following figure.
S pe e d C on tro lle r
+
–
+
–
–
–
M
nnom
+
–
C u rr e n t -m o d e
co ntr ol
R e s o lv e r
C o n d i it o n in g
R
Figure 1: Principle of the Amplifier
The speed control loop consists of speed controller, circuit, motor and speed
measurement. The nominal speed value is externally given, e.g. through potentiometer, NC
control or something similar. The actual speed value is determined at the motor shaft by a
resolver. The difference between nominal value and actual value is formed at the summing
point and transmitted to the speed controller. The speed controller then defines the
required current set value.
The current control loop consists of the current controllers, the amplifier stage, the current
measurement and the motor windings. The current set values available at the output of the
current controller, control the six power switches of the inverter through a pulse-width
modulator. With a PWM frequency of 9.5kHz this leads, due to the special activation, to a
current ripple of 19kHz and consequently to a merely audible clock noise.
This secondary control loop (current) under another one (speed) guarantees a stable
control with good dynamics and high rigidity of the drive. This even allows the easy
realization of current limitations, necessary to protect the motor and the amplifier, just by
limiting the output voltage of the speed controller (current set value).
6
2.4 Block diagram
Figure 2: Block Diagram
7
2.5 Function Description
The function of the amplifier is described by means of the block diagram shown in Figure
2.
2.5.1 Power Supply
• Power amplifier:
Rectification and filtering form the direct voltage (intermediate circuit voltage UB),
necessary to operate the power amplifier, from the AC power supply. This
intermediate circuit voltage can also be fed directly as d.c. voltage.
• Electronic supply
The electronic supply takes place internally through a switched-mode power supply
from the intermediate circuit voltage.
2.5.2 Control Sy stem
• Speed controller and current limiting
The nominal speed value can be fed through the input differential amplifier. In the
stage connected on load side the positive and negative set values are suppressed
separately (limit switch logic). The speed set value, conditioned by this way, is then
injected to the speed controller. The inverted tachometer voltage, injected to the speed
controller, in this device, is gained from the resolver signals, by means of a
corresponding procedure. The current set value is then available at the output of the
speed controller.
There are different possibilities to limit the nominal current:
The I
The actual current values are rectified, quadrated and run to a low pass. The circuit
limits the current to the continuous current value, which corresponds to the position of
the potentiometer P5, when the output voltage of the low pass reaches the voltage,
adjusted at this potentiometer. Furthermore, the maximum possible nominal current
can be adjusted to 0...15A, 0...25A or 0...18A with an externally fed voltage of 0...10V
at the input I ext.
The maximum pulse current, deliverable by the device can be adjusted with the
potentiometer P2 of the internal current limiting. This current limiting is connected on
load side of the previously mentioned current limitations - this guarantees that the
current adjusted here, can never by exceeded.
2
t current limiting reduces the current set value, using the following procedure:
8
• Current-mode control and current controller
As shown in the block diagram, the current-mode control must be passed through first,
to form the actual current set value for the current controller of the U-conductor current
and of the V-conductor current. The nominal current of the speed controller output
(conductor curren t) is converted, depending on signals of the resolver, in two current
set values with an offset of 120º and fed to the current controllers for the phases U and
V. The nominal current of the third phase W is imitated by subtraction at the outputs of
the current controller. This guarantees, that the sum of the currents is always zero.
The pulse-width modulator generates from the three d.c. voltage signals for the
conductor currents six PWM signals, which serve for activating the driver stage after
the creation of the lag time.
2.5.3 Driver stage and power amplifier
The driver stage amplifies the signals, coming from the pulse-width modulator and by this
activates the power transistors. MOSFET transistors are used in the power amplifier, which
allows short switching intervals and low residual voltage drop and ensures a good
efficiency.
2.5.4 Monitoring and Fault Logic, Enable
The intermediate circuit voltage and the current in the intermediate circuit are permanently
monitored by the error detection. The device switches off the motor through the error logic
when these values exceed certain quantities. The error logic also reacts when the device
temperature exceeds the allowed values because of insufficient air circulation or a too high
ambient temperature. Restart is possible only after switch -off and switch-on of the supply
voltage.
Now the power amplifier can be enabled at the enable input with an external voltage, the
motor turns.
9
For safety reasons enable is possible only when the device is ready for
operation! This avoids that the motor starts running in an uncontrolled
manner when applying the operating voltage while the enable signal is
!
already applied.
That means a permanent wired connection of e.g. +24V after the enable
input ensures that the motor will not start running when switching on the
operating voltage.
The logic also switches off in case of undervoltage in the intermediate circuit
and undervoltage of the electronic voltages. The device changes to
readiness only when the minimum voltages, necessary for a safe operation,
are available.
The motor slows down and enable is disabled if an undervoltage of the
electronic supply occurs during the operation. If there is an undervoltage in
the intermediate circuit the motor slows down and starts running when the
minimum voltage is exceeded.
10
2.6 Function as Current Controller
In the case the device was not ordered as current controller, the adjustment ex factory is
"Speed control".
In some applications it may be useful to operate the TBF amplifier as a pure current
controller, because a torque control is desired or the speed controller in the master control
is already realized.
To set the amplifier to current control or speed control set the three soldering jumpers JP9,
JP10 and JP11 (see figure) as follows:
JP9.1 to JP9.2 JP10.1 to JP10.2 JP11.1 to JP11.2
Speed control closed closed open
Current control open open closed
Numbering of the soldering jumpers is as follows: e.g. for JP9: JP9.1= right field of the
soldering jumper, JP9.2= left field of the soldering jumper.
Speed control Current control
Figure 3: Jumper Settings
J P 11
STR O M
J P 1 0
D R E HZ .
+
P C - T B F / 2( STR -D R Z )
11
2.7 List of Possible Adjustments and Indicators
2.7.1 The LEDs
LED1 (green) Indicates readiness of the device; lights also when the amplifier is
not enabled.
LED2 (yellow) l2t- current limiting is active
LED3 (red) Fault (overcurrent, overvoltage, overtemperature).
LED4 (yellow) Ballast circuit operates (only for 120V devices).
2.7.2 The Potentiometers
Potentiometer 1 Signal Potentiometer scales the nominal speed input to match the
maximum velocity feedback used for adjusting the maximum motor
speed (10 to 100%).
Potentiometer 2 Pulse current limiting; range from 10 to 100% of the rated peak
current.
Potentiometer 3 Adjustment of the amplification of the speed controller.
Potentiometer 4 Offset adjustment of the speed controller.
Potentiometer 5 Continuous current limit; range from 0 to 100% of rated peak current.
2.7.3 The Test Points
MP0 Ground ref erence 0V
MP1 Nominal voltage Voltage at the differential -
nominal speed input (referred to ground)
MP2 Output of the speed controller (set value): 10V ≈ 15A (TBF60/5R)
≈ 25A (TBF60/10R)
≈ 18A (TBF120/7R)
MP3 Tachometer voltage: 10V ≈ 6000 rpm
MP4 Fault diagnosis 9V ±0.4V ≈ Overcurrent
8V ±0.4V ≈ Overvoltage
7V ±0.4V ≈ Overtemperature
MP5 Current monitor Phase V: 10V ≈ 15A (TBF60/5R)
≈ 25A (TBF60/10R)
≈ 18A (TBF120/7R)
MP6 Current monitor Phase U: 10V ≈ 15A (TBF60/5R)
≈ 25A (TBF60/10R)
≈ 18A (TBF120/7R)
12
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