Patent ID: 9379658
Filing Date: 2016-06-28
CPC Classification: H02K,H02P

Claim Text:
1. An apparatus for controlling an induction machine in a system including a first determination unit configured to determine a command voltage in response to a command frequency from a predetermined voltage-frequency relationship, and an inverter configured to drive an induction motor in response to the command voltage, the apparatus comprising: a second determination unit configured to determine the magnitude of a current outputted from the inverter to the induction motor; and a third determination unit configured to determine a voltage compensation amount for compensating (offsetting) the command voltage in response to the magnitude of a current outputted from the inverter to the induction motor, wherein the first determination unit outputs a final command voltage in which the command voltage determined by the voltage-frequency relationship in response to the voltage compensation (offset) amount received from the third determination unit is added by the voltage compensation amount.