Power conversion device, motor containing same, air conditioner containing motor, and ventilation fan containing motor

摘要

Provided are a power conversion device that enables a substrate that is to be mounted to be miniaturized by means of the miniaturization of elements and the configuration, a motor containing the power conversion device, an air conditioner containing the motor, and a ventilation fan containing the motor. The power conversion device is provided with: a printed wiring board (1), the mounting surface of which faces the annular surfaces constituted by annular stators (3) constituting a motor (61), is positioned separately from the annular surfaces at a prescribed distance, and has hole elements (6), which detect the rotational position of a rotor (16) of the motor (61), mounted on the mounting surface on the stator (3) side; an inverter IC (2) that is mounted to the mounting surface of the printed wiring board (1) on the stator (3) side, and that supplies a high-frequency current to the stator (3); and an overheat detector (14) that is mounted to the mounting surface of the printed wiring board (1) on the stator (3) side. The inverter IC (2) restricts or stops the current supplied to the stator (3) when overheating is detected by the overheat detector (14).