A device that ensures uninterrupted power supply of magnetic bearings when power supply voltage is lost

摘要

The device has a static frequency converter (2) supplied with electrical energy by a supply voltage, and for controlling a motor (3). The motor has a shaft that is supported by a magnetic bearing (5). A transformer (7) is connected with a rectifier (8) and the motor. The rectifier supplies the electrical energy to an electrical intermediate circuit (11) of another static frequency converter (14) during the failure of power supply. The rectifier controls the magnetic bearing.