OMNIREL OM9399SP Datasheet

PRELIMINARY

OM9399SP

Rev 01 5/29/00

205 Crawford Street • Leominster MA 01453 • Phone: [phone] • Fax: [phone] • www.omnirel.com

1

FEATURES / BENEFITS

• Embedded Motor Control DSP improves system integration and flexibility

• 25A average phase current with 325V maximum bus voltage

•

Hall Effect sensor based or sensorless control for improved reliability

• Logic supplies (+15V/+5V) generated onboard, eliminating external parts

• Serial port for isolated RS-232 interface allows system level control

• Direction and Velocity control

•

Rugged plastic module for high relia bility applications

•

Low impedance bus terminal construction

APPLICATIONS

• Fans

• Pumps

•

Compressors

• Fin Actuators

• Braking Systems

DESCRIPTION

The OM9399SP is a DSP-based motor controller for three-phase AC Motors, such as the Permanent Magnet
Synchronous Motor (PMSM) or the AC Induction Motor (ACIM). The controller is designed to improve
system integration, efficiency, flexibility, and reliability while reducing the overall system cost. The
OM9399SP can be configured for trapezoidal commutation via Hall effect sensor feedback. In this
configuration, the Hall effect sensor outputs provide discrete absolute rotor position for commutation. The
Hall effect sensor outputs are fed into the control port, level shifted onboard from 15V to 5V, then fed
directly into the DSP. Based on this information, velocity is determined. Alternatively, the OM9399SP can
be configured for sinusoidal or trapezoidal commutation via sensorless control. Consult the factory for
details.

The OM9399SP requires a single ended 28V supply for logic and up to 270V for motor bus. The logic
voltage supplies (15V and 5V) are derived onboard from the 28V supply. The OM9399SP will
accommodate either an analog or digital command input. For the latter, a serial port is provided onboard to
interface with an isolated RS-232 communications port. The OM9399SP provides direction control as well
as current limit for over-current protection.

The OM9399SP is a complete motor control solution housed in a rugged plastic module desi gned for high
reliability applications. The assembly process includes chip-on-DBC (Directly Bonded Copper) technology
for the power stage to maximize the power density, and thick film and surface mount technologies for the
driver and control stages. This combination of chip-on-DBC, and the thick film surface mount technologies,
and rugged plastic pac ka ge provides a low cost, high performance motor control solution for high reliability
applications including fans, pumps, compressors, fin act uators and bra ki ng systems.

DSP-BASED MOTOR CONTROLLER

PRELIMINARY

OM9399SP

Rev 01 5/29/00

205 Crawford Street • Leominster MA 01453 • Phone: [phone] • Fax: [phone] • www.omnirel.com

2

SIMPLIFIED BLOCK DIAGRAM

DSP Control

&

Interface

Phase

Voltage/Current

Sense

Bus Voltage Sense

Va

Vb

Vc

6

3

M

HV I C Driver

+

-

270V

Hall Inputs

Hall Effect Sensor

Outputs

Ia

Ib

Ic

+28V

PRELIMINARY

OM9399SP

Rev 01 5/29/00

205 Crawford Street • Leominster MA 01453 • Phone: [phone] • Fax: [phone] • www.omnirel.com

3

ABSOLUTE MAXIMUM RATINGS

Motor Supply Voltage, V

m max

………………………………...…………..….….325Vdc
Average Phase Output Current, Io@ TA = +25o C ……………………….………..30Adc
Logic Input Voltage

(Note 1)

……………………………….………………….…...5.25V
Operating Temperature Range……..……………………………….…...-40o C to +85o C
Power Switch Junction-to-Case Thermal Resistance, Rqjc …………….……...0.48o C/W

RECOMMENDED OPERATING CONDITIONS

(TA = 25o C)

Motor Power Supply Voltage, Vm …………………………………………….+270 Vdc

Average Phase Output Current, Io …………………………………………....……25 A

Note 1: Logic Inputs: Direction, Speed In, Reset

PRELIMINARY

OM9399SP

Rev 01 5/29/00

205 Crawford Street • Leominster MA 01453 • Phone: [phone] • Fax: [phone] • www.omnirel.com

4

ELECTR ICAL CHARACTERISTICS (TA = 25

o

C)

Parameter Symbol Conditions MIN TYP. MAX. Units

Power Output Section

IGBT Leakage Current I

ces

Vce = 600 Vdc 300

µA

Vge = 0V

IGBT c-e Saturation Voltage Vce(sat) Ic = 50Adc 3.2 V

Vge = 15V

Diode Leakage Current I

r

Vr = 600Vdc 100

µA

Diode Forward Voltage V

f

If = 37A 1.7 V

Diode Reverse Recovery Time trr

I

o

=1A, di/dt = -100A/µsec

50 nsec

Vr = 30V

Logic Input Section

Low Level Input Voltage V

IL

0.8 V

High Level Input Voltage V

IH

2.0 V

Command Input Section

Speed In Voltage Range V

CM

05V

PINOUT

PIN # NAME

Direction

Speed In

Logic_Gnd

Reset

DRIB

DT1
Logic_Gnd
PWMTRIP
Logic_Gnd

TFSI

+28V
Hall_1
Hall_2
Hall_3

+15V

Logic_Gnd

AUX PW M

RFSI

Logic_Gnd

Reset_RS232

Voltage Bus

Bus Return

Phase A
Phase B
Phase C

PRELIMINARY

OM9399SP

Rev 01 5/29/00

205 Crawford Street • Leominster MA 01453 • Phone: [phone] • Fax: [phone] • www.omnirel.com

5

PIN DESCRIPTIONS / FUNCTIONALITY

PWMTRIP - A logic low at this input places all six PWM outputs in the OFF state. Otherwise, this

pin is pulled up to +5V onboard.

+28V – This supply is required to generate logic supplies (+15V / +5V) onboard.
Direction - This logic input is used to select the motor direction.

Speed In - This input is the analog command input to the OM9399SP.
Reset - A logic low at this input initiates a complete hardware reset of the DSP.
AUX_PWM - This output is an auxiliary PWM output.
Logic_Gnd - This pin provides the reference point for the command section.
TFS1 - This pin is left open during normal operation. It is dedicated for engineering purposes only.
RFS1 - This pin is left open during normal operation. It is dedicated for engineering purposes only.
Logic_Gnd - This pin provides the reference point for the +15V supply.
Reset_RS-232 - A logic low at this input initiates a complete hardware reset of the DSP. This reset is

provided t hrough the RS-232 interface.
DR1B - This pin is dedicated as the data receive pin for the RS-232 interface. Note that an isolated RS-232

interface is offered with the OM9399SP. Consult the factory for more information.

Logic_Gnd - This pin provides the reference point for the RS-232 interface.
DT1 - This pin is dedicated as the data transmit pin for the RS-232 interface. Note that an isolated RS-232

interface is offered with the OM9399SP. Consult the factory for more information.

+15V - This supply is provided for the Hall effect sensor bias.
Hall_1 - This pin is dedicated to the phase A Hall effect sensor output.
Hall_2 - This pin is dedicated to the phase B Hall effect sensor output.
Hall_3 - This pin is dedicated to the phase C Hall effect sensor output.
Logic_Gnd - These pins provide the reference point for the +28V supply.
Voltage Bus - This terminal is connected to the positive terminal of the 270V supply.
Bus Return - This terminal is connected to the negative terminal of the 270V supply.
Phase A - This terminal is connected to the phase A motor lead.
Phase B - This terminal is connected to the phase B motor lead.
Phase C - This terminal is connected to the phase C motor lead.

PRELIMINARY

OM9399SP

Rev 01 5/29/00

205 Crawford Street • Leominster MA 01453 • Phone: [phone] • Fax: [phone] • www.omnirel.com

6

MECHANICAL SPECIFICATIONS

• Overall Dimensions

(L) 4.25 in. x (W) .48 in. x (H) TBD

• Weight: TBD