OM9391SP International Rectifier Corp., OM9391SP Datasheet

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OM9391SP

Manufacturer Part Number
OM9391SP
Description
Dsp-based Motor Controller
Manufacturer
International Rectifier Corp.
Datasheet
FEATURES / BENEFITS
APPLICATIONS
DESCRIPTION
The OM9391SP 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
OM9391SP 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 OM9391SP can
be configured for sinusoidal or trapezoidal commutation via sensorless control. Consult the factory for
details.
The OM9391SP 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 OM9391SP 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 OM9391SP provides direction control as well
as current limit for over-current protection.
The OM9391SP is a complete motor control solution housed in a rugged plastic module designed for high
reliability applications. The assembly process includes chip-on-IMS (Insulated Metal Substrate) technology
for the driver and power stages to maximize the power density and surface mount technology for the control
stage. This combination of chip-on-IMS and surface mount technologies and rugged plastic package
provides a low cost, high performance motor control solution for high reliability applications including fans,
pumps, compressors, fin actuators and braking systems.
Rev 01 5/29/00
Embedded Motor Control DSP improves system integration and flexibility
15A 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 reliability applications
Low impedance bus terminal construction
Fans
Pumps
Compressors
Fin Actuators
Braking Systems
DSP-BASED MOTOR CONTROLLER
205 Crawford Street Leominster MA 01453 Phone: 978 534 5776 Fax: 978 537 4246 www.omnirel.com
PRELIMINARY
OM9391SP
1

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OM9391SP Summary of contents

Page 1

... Consult the factory for details. The OM9391SP 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 OM9391SP will accommodate either an analog or digital command input ...

Page 2

... DSP Control & Interface HV IC Driver Hall Inputs Bus Voltage Sense 3 Rev 01 5/29/00 PRELIMINARY SIMPLIFIED BLOCK DIAGRAM Phase Voltage/Current Sense 205 Crawford Street Leominster MA 01453 Phone: 978 534 5776 Fax: 978 537 4246 www.omnirel.com OM9391SP + 270V M Hall Effect Sensor Outputs - 2 ...

Page 3

... Vdc m …………………………………………....…… OM9391SP +85 ...

Page 4

... 37A f f trr I =1A, di/dt = -100A/ sec 30V PIN # 205 Crawford Street Leominster MA 01453 Phone: 978 534 5776 Fax: 978 537 4246 www.omnirel.com OM9391SP MIN TYP. MAX. 300 3.2 100 1.7 50 0.8 2 NAME Direction Speed In Logic_Gnd Reset DRIB DT1 ...

Page 5

... 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 OM9391SP. Reset - A logic low at this input initiates a complete hardware reset of the DSP. AUX_PWM - This output is an auxiliary PWM output. ...

Page 6

... MECHANICAL SPECIFICATIONS Overall Dimensions (L) 4.25 in. x (W) .48 in. x (H) TBD Weight: TBD Rev 01 5/29/00 205 Crawford Street Leominster MA 01453 Phone: 978 534 5776 Fax: 978 537 4246 www.omnirel.com PRELIMINARY OM9391SP 6 ...

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