| 摘要 |
A position detection device (10) of active magnetic bearings maintaining the position of a rotating shaft and comprising two sensing inductance coils (12A, 12B), the position detection device further comprising: a programmable digital component (16) for generating a 25 KHz square waveform signal, a current amplifier (18; 20A, 20B) receiving the 25 KHz square waveform signal and injecting two identical control currents in the two sensing inductance coils, a differential amplifier (22) for amplifying a voltage difference between the resulting voltages in the two sensing inductance coils and depending on the displacement of the rotating shaft, and a A/D converter (24) for delivering a position value from the voltage difference. |
