Battery-based active magnetic bearing system and a power supply circuit thereof

A battery-based magnetic bearing system, comprising:

• one or more electromagnetic bearings and a magnetic bearing control drive configured with a motor;
• a power supply circuit configured with the motor, the one or more electromagnetic bearings, and the magnetic bearing control drive, wherein the power supply circuit comprises:
• a power convertor electrically connected to an alternating current (AC) power source, the power convertor configured to convert AC electrical power supplied by the power source into a direct current (DC) electrical power having first electrical attributes;
• an inverter electrically connected between the power convertor and the motor, the inverter configured to convert the DC electrical power supplied by the power convertor into another AC electrical power having second electrical attributes and correspondingly supply the another AC electrical power to the motor;
• and
• a battery, an input side of the battery electrically connected to a DC bus configured between the power convertor and the inverter, and an output side of the battery electrically connected to the one or more electromagnetic bearings and the magnetic bearing control drive, wherein the battery is configured to receive and store at least a portion of the DC electrical power;
• and
• a controller in communication with the motor, the one or more electromagnetic bearings and the magnetic bearing control drive, and the power supply circuit, wherein the controller is configured to enable supply of the stored electrical power from the battery to the one or more electromagnetic bearings and the magnetic bearing control drive in an event of failure of supply of electrical power to the motor.