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在回转轴的两端轴颈处,设置成直角布置的四个电磁铁,这就形成了磁轴承,其磁力线由电磁铁芯→空气隙→回转轴→空气隙→再返回到铁芯形成一个回路。轴(或至少是轴承部位的轴颈)应由冷轧钢或其它铁磁材料制造。轴在回转时,由涡流式或电容式传感器检测轴在相对于两对电磁铁方向的位移,一方面把测得的位置信号(电压)与轴线处在中心位置时的基准电压相比较,以得到误差信号;另一方面,轴的位置信号还传给微分器,以得到速度信号。上述的位置误差信号和速度信号在移相放大器中
In the shaft at both ends of the journal, set to be arranged at right angles to the four electromagnets, which formed a magnetic bearing, the magnetic lines of force from the solenoid core → air gap → rotary axis → air gap → back to the core to form a Loop. The shaft (or at least the bearing journal) should be made of cold rolled steel or other ferromagnetic material. When the shaft is rotating, the displacement of the shaft in the direction of the two pairs of electromagnets is detected by an eddy current sensor or a capacitive sensor. On the one hand, the measured position signal (voltage) is compared with the reference voltage when the axis is centered Get the error signal; On the other hand, the shaft position signal is also passed to the differentiator to get the speed signal. The above-mentioned position error signal and speed signal are in the phase-shift amplifier