Patent ID: 9257933
Filing Date: 2016-02-09
CPC Classification: H02P

Claim Text:
1. An induction motor comprising: a stator in which coils directly connected to a single-phase or 3-phase or more systematic power supply are wound; a rotor that is supported to be rotatable in the stator; a power conversion device that is formed on a surface of the rotor and controls a rotor current without connection of a separate external power supply; and a control circuit that is connected to the power conversion device and controls the power conversion device, wherein the power conversion device is unwired to the systematic power supply, wherein the control circuit comprises a current controller that generates a voltage command on the basis of a rotor current command, a DC-link voltage of the power conversion device, and a rotor current, and wherein the power conversion device applies a voltage to the rotor on the basis of the generated voltage command.