5.3 Motor Control ModesThe MICROMASTER Vector and MIDIMASTER Vector inverters have four different modes of operation whichcontrol the relationship between the voltage supplied by the inverter and the speed of the motor. The motorcontrol mode of operation is selected at P077:• Linear voltage/frequency Operation.• Flux Current Control (FCC) which is used to maintain full flux conditions in the motor.• Quadratic voltage/frequency relationship which is used for pumps and fans.• Sensorless Vector. The inverter calculates the changes required in output voltage to maintain the desiredmotor speed.These modes are described in more detail below.
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