SYSTEM OF CONTROLLING INDUCTION ELECTRIC MOTOR

摘要

In some embodiments, a system of controlling an induction electric motor, includes a command voltage output unit for generating a command voltage for operating an inverter according to a command speed and outputting the generated command voltage to the inverter; a control unit for controlling the command voltage output unit such that the command voltage output to the inverter is compared with an operation limiting voltage and the command voltage is corrected to fall within the operation limiting voltage; and the inverter for controlling the induction electric motor depending on the corrected command voltage. Thus, it is possible to precisely control the induction electric motor even in a high speed operation region by regulating the magnitude of the command voltage applied to the induction electric motor by means of dynamic modulation strategies without the magnetic flux controller.

主权项

1. A system of controlling an induction electric motor, comprising:
an input unit configured to receive a command speed for operating an induction electric motor at a high speed above a preset speed; a command voltage output unit configured to generate a command voltage for operating an inverter based on the received command speed and configured to output the generated command voltage to the inverter; a control unit configured to control the command voltage output unit such that the command voltage output to the inverter is compared with a preset operation limiting voltage and correct the generated command voltage to fall within the preset operation limiting voltage, depending on a result of the comparison; and the inverter configured to control the induction electric motor at the high speed depending on the corrected command voltage.