OMNIREL OM510 Datasheet

0 (0)

OMC510

DSP-BASED MOTOR CONTROLLER FOR

THREE-PHASE BRUSHLESS DC MOTORS

FEATURES / BENEFITS

Embedded Motor Control DSP (ADMCF328) improves higher level system integration and flexibility

7A phase current (cycle-by-cycle current limit)

Hall Effect sensor based; sensorless control optional 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

2.5 Inch diameter to fit inside motor housing

APPLICATIONS

Fans

Pumps

Compressors

DESCRIPTION

The OMC510 is a DSP-based three-phase brushless DC motor controller intended to replace the analog controller to improve system integration, efficiency, flexibility, and reliability while reducing the overall system cost. The standard OMC510 is configured for 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 OMC510 can be configured for commutation via sensorless control. Three resistor divider networks are provided onboard for back EMF measurements. In this configuration, the inactive winding is used to measure the back EMF, and based on these measurements, estimates of position and velocity are derived. Consult the factory for details.

The OMC510 requires a single ended 28V supply for operation. The logic voltage supplies (15V and 5V) are derived onboard. The OMC510 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 OMC510 provides direction control as well as current limit for over-current protection.

The OMC510 is a 2.5 inch diameter circuit board assembly designed for small size and low cost, and it is ideal for installation inside a motor housing. The assembly process includes chip-on-board technology for the driver and power stages to maximize the power density and surface mount technology for the control stage. The small size, low cost and performance of the OMC510 make it an ideal control solution for applications including fans, pumps and compressors.

Rev 03 09/27/00

1

205 Crawford Street Leominster MA 01453 Phone: 978 534 5776 Fax: 978 537 4246

www.omnirel.com

OMNIREL OM510 Datasheet

OMC510

SIMPLIFIED BLOCK DIAGRAM

 

 

+

28V

PC

 

 

 

DSP

6

 

M

Control

 

 

 

&

 

 

 

Interface

 

 

 

HV IC Driver

 

 

 

 

 

Hall Effect Sensor

 

 

 

Outputs

 

Hall Inputs

 

 

 

Bus Voltage Sense

Current Sense

 

 

Current Sense

-

 

 

 

Va

 

Phase

 

3

Voltage

Vb

 

Sense

Vc

 

 

 

 

 

 

Rev 03 09/27/00

2

205 Crawford Street Leominster MA 01453 Phone: 978 534 5776 Fax: 978 537 4246

www.omnirel.com

 

 

 

 

 

 

 

 

 

OMC510

CHARACTERISTICS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Maximum Ratings

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Peak Motor Supply Voltage

 

 

V pk

 

 

32

 

Input Voltage (Analog/Digital)

 

 

V

 

-0.3 to +3.3 / -0.3 to +5.3

 

Operating Ambient Temperature

 

 

°C

 

 

0 to +85

 

Storage Temperature

 

 

 

°C

 

 

-20 to +125

 

Nominal Power Ratings

Module Thermal & Mechanical Characteristics

 

 

 

 

 

 

 

 

 

 

Motor Supply Voltage

VDC

28

Thermal Resistance

 

°C/W

 

55

 

 

 

 

(Junction to Ambient)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Continuous Current

ARMS

7

Max. Ambient

 

°C

 

85

 

 

 

 

Temperature

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Current Overload

%

200 for 3 Sec;

Dimensions (Ø)

 

in./mm

 

2.50 / 63.5

 

 

 

150 for 1 min.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PERFORMANCE SPECIFICATIONS

Speed Regulation:

+ 2 RPM

Speed Accuracy:

+ 0.1 %

Velocity Bandwidth:

> 100 Hz

Constant Torque/

 

Speed Range:

50:1

Starting Torque:

Start into locked rotor

Torque Response:

1.5 mSec

Rev 03 09/27/00

3

205 Crawford Street Leominster MA 01453 Phone: 978 534 5776 Fax: 978 537 4246

www.omnirel.com

Loading...
+ 5 hidden pages