Scalar vs Vector Control Mode

Three-Phase Induction Motor in Scalar Control Mode

Scalar control is typically achieved by controlling the voltage to frequency ratio in an open or closed loop. Optimized motor efficiency can be achieved by implementing slip regulation.

Major Applications:

Washing machinesHeating, ventilation andair conditioningBlowers, fans and pumpsIndustrial control

Three-Phase Induction Motor in Vector Control Mode

Vector control provides real time processing of the stator phase current and rotor positioning. It provides four quadrants operation and excellent dynamic behaviour to maintain optimum efficiency and speed response time.

Major Applications:
RoboticsHigh-end industrial controlServo Controller


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