Field-oriented control for a three-phase motor, which is fed a voltage - pulse-controlled inverters

摘要

A control system uses a vector multi-variable controller. The actual currents and the speed of the motor (either an induction motor or a permanent magnet synchronous one) are measured and the setpoints for the field-forming and torque-forming current components are assumed by the PI-controllers 1,2. A voltage pulse inverter 4 is controlled with regard to the system parameters by the multi-variable controller and at its output, supplies the phase voltages and currents to the motor. The multi-variable controller outputs normalised values for the stator voltage components, whose maximum values are limited to a lower value than the normalised value of the intermediate voltage feeding the inverter.