COMPARISON OF FREQUENCY CONTROL LAWS ON THE EXAMPLE OF THE ALTIVAR 21 FREQUENCY CONVERTER

Abstract

The output voltage and current consumed by the frequency converter (inverter) are experimentally investigated, depending on the engine moment and the frequency of the IF on the basis of different laws of frequency control of the induction motor. It is proved that the energy saving law of frequency control (the law of minimum current) due to the reduction of the voltage on the stator of the engine and stator current provides the lowest level of consumption of the converter of active power.