OMNIREL OM510 Datasheet
OMC510
Rev 03 09/27/00
205 Crawford Street • Leominster MA 01453 • Phone: 978 534 5776 • Fax: 978 537 4246 • www.omnirel.com
1
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.
DSP-BASED MOTOR CONTROLLER FOR
THREE-PHASE BRUSHLESS DC MOTORS
OMC510
Rev 03 09/27/00
205 Crawford Street • Leominster MA 01453 • Phone: 978 534 5776 • Fax: 978 537 4246 • www.omnirel.com
2
SIMPLIFIED BLOCK DIAGRAM
28V
DSP
Control
&
Interface
Phase
Voltage
Sense
Bus Voltage Sense
Va
Vb
Vc
6
3
M
HV IC Driver
+
-
PC
Hall Inputs
Hall Effect Sensor
Outputs
Current Sense
Current Sense
OMC510
Rev 03 09/27/00
205 Crawford Street • Leominster MA 01453 • Phone: 978 534 5776 • Fax: 978 537 4246 • www.omnirel.com
3
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
(Junction to Ambient)
°C/W 55
Continuous Current A
RMS
7
Max. Ambient
Temperature
°C
85
Current Overload
%
200 for 3 Sec;
150 for 1 min.
Dimensions (Ø) in./mm 2.50 / 63.5
PERFORMANCE SPECIFICATIONS
Speed Regulatio n: + 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
Loading...