초록 ▼

It is an object of the present invention to provide a magnetic bearing controller which is able to levitate the controlled object stably by using controlled magnetic forces. In the magnetic bearing controller which supplies a controlled current to an electromagnet for levitating a rotating body at a

It is an object of the present invention to provide a magnetic bearing controller which is able to levitate the controlled object stably by using controlled magnetic forces. In the magnetic bearing controller which supplies a controlled current to an electromagnet for levitating a rotating body at a predetermined position, the controller is provided with an eliminator unit for eliminating frequency components of frequency area which is used by the status detector unit. The eliminator unit is inserted between signal amplifier unit and power amplifier unit for generating controlled current.

대표청구항 ▼

1. A magnetic bearing device for levitating a rotating body at a predetermined position, said device comprising:an electromagnet for generating magnetic force by a controlled current; a power amplifier unit for supplying said controlled current to said electromagnet, said controlled current being pu

1. A magnetic bearing device for levitating a rotating body at a predetermined position, said device comprising:an electromagnet for generating magnetic force by a controlled current; a power amplifier unit for supplying said controlled current to said electromagnet, said controlled current being pulse width modulated; a signal amplifier unit for amplifying signal before inputting to said power amplifier; and a status detector unit for detecting a status of said rotating body; wherein said status detector unit uses a modulated signal of a certain fundamental frequency and an eliminator is inserted between said signal amplifier unit and said power amplifier unit for eliminating frequency components of a frequency area around said fundamental frequency.