OM510 データシートの表示（PDF） - Omnirel Corp => IRF

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OM510

DSP-BASED MOTOR CONTROLLER FOR THREE-PHASE BRUSHLESS DC MOTORS

Omnirel Corp => IRF 

OMC510

FUNCTIONAL DESCRIPTION

Inverter

The three-phase inverter consists of power MOSFETs which utilize advanced processing techniques to

9876s controlled to regulate the shaft speed with a Proportional-Integral (PI) regulator.

Current Sense

A single precision current sense resistor (1% tolerance), combined with a sophisticated algorithm, eliminates

the need for separate phase current sense resistors while still providing disturbance torque information to

improve the efficiency and robustness of the system.

Gate Drive

The gate drive section incorporates high speed power MOSFET drivers with independent high and low side

referenced output channels. The gate driver design, in conjunction with the inverter design, provides for low

noise inverter operation.

Protection

Protection from short circuit conditions is provided by disabling the controller without damage to the

inverter. Under-voltage protection is provided in the gate drive section thus preventing damage to the

inverter due to insufficient gate drive voltage.

PWM System

Space Vector Modulation (SVM) is employed to provide better bus utilization, lower torque ripple, and

lower commutation losses than the standard sinusoidal PWM method. In addition, other benefits of SVM

versus the sinusoidal PWM method include ease of control and quicker response.

Motor Control Algorithms

The OMC510 can be configured for trapezoidal drive using either Hall effect sensors for absolute rotor

position feedback or a sensorless Back-EMF zero crossing detection scheme. Consult the factory for

ordering information.

Speed Regulator

The OMC510 accepts speed commands from either an isolated RS-232 port or an analog input (0 to 3V).

The speed command is compared with the estimated shaft speed and the motor torque is controlled to

regulate the shaft speed with a Proportional-Integral (PI) regulator.

Rev 03 09/27/00

4

205 Crawford Street • Leominster MA 01453 • Phone: 978 534 5776 • Fax: 978 537 4246 • www.omnirel.com

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