Magnetic bearing and compressor using the same

A magnetic bearing comprising:

• a stator including a plurality of electromagnets and configured to exert a combined electromagnetic force of the plurality of electromagnets on a drive shaft having a fluctuating load;
• and
• a controller configured to control a current difference between a first coil current passed through a coil of the electromagnet generating an electromagnetic force in a direction opposite to that of the load and a second coil current passed through a coil of the electromagnet generating an electromagnetic force in the same direction as that of the load to perform a position control on the drive shaft, and adjust the second coil current to reduce an average value of the second coil current.