Controller for induction motor

A controller for an induction motor that controls the induction motor in which a leakage inductance changes with a change in primary current, comprising:

• a current regulator into which a magnetization current command value and a magnetization current actual value, which are magnetic flux axial components of the primary current, and a torque current command value and a torque current actual value, which are torque axial components perpendicular to the magnetic flux axial components, are input, and which generates a magnetization voltage command value based on the magnetization current command value and the magnetization current actual value and generates a torque voltage command value based on the torque current command value and the torque current actual value;
• and
• a proportional gain setter that sets a magnitude of a proportional gain of the current regulator,
• wherein the proportional gain setter sets the magnitude of the proportional gain based on the leakage inductance in response to the primary current.