Title: Digital switch power amplifier for magnetic suspension flywheel magnetic bearing system
Application Number: 200610114390 Application Date: 2006.11.09
Publication Number: 1949642 Publication Date: 2007.04.18
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H02M3/155;H02M3/156;G05F1/56
Applicant(s) Name: Beijing Univ. of Aerospace Address:
Inventor(s) Name: Fang Jiancheng;Liu Hu;Liu Gang;Han Fujun;Zhang Lia
Attorney & Agent: guanling lixin hua
Abstract:
    The invention is a digital switching power amplifier for magnetic bearing system of magnetic suspension flywheel, a device for actively controlling the current in the magnetic bearing coil, mainly comprising FPGA, isolated driving circuits, full-bridge main circuit, current detection circuit, conditioning circuit, A/D chip and overcurrent detection circuit. And the digital switch power amplifier makes PWM modulation by the error signal formed by the FPGA according to the given digital control quantity and sampling result of current feedback signal, directly control ON and OFF of power switches in the full bridge main circuit by the ready- modulated PWM signals through the isolated driving circuits, so as to achieve the purpose of controlling the current in the magnetic bearing coil. And the invention has advantages of simple structure and high reliability.
Time: 5
<- Previous Patent:Reference voltage generator   |  Next Patent:Constant-voltage circuit and cont... ->