Patent ID: 9252698
Filing Date: 2016-02-02
CPC Classification: H02P

Claim Text:
1. An inverter device comprising: a power supply unit that supplies alternating-current (AC) power to an AC motor whose electric characteristics in response to a rotation speed are switchable between low speed characteristics and high speed characteristics; and a switch controller that switches the electric characteristics of the AC motor, wherein the switch controller executes switching control that alternately switches the electric characteristics of the AC motor between the low speed characteristics and the high speed characteristics on the basis of the rotation speed of the AC motor in a case where the rotation speed of the AC motor is greater than a first reference rotation speed and less than a second reference rotation speed which is greater than the first reference rotation speed, wherein the electric characteristics of the AC motor are switchable by switching a winding state between a low speed winding and a high speed winding, and wherein the switch controller executes the switching control by alternately switching the winding state of the AC motor between the low speed winding and the high speed winding.