Rotor levitation centre determination method for permanent magnet motor-driven maglev molecular pump
A permanent magnet motor and magnetic levitation technology, applied in the direction of measuring device, using electric device, using electromagnetic means, etc., to achieve the effect of accurate acquisition and elimination of magnetic bias pulling force
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[0031] Such as figure 1 As shown, it is a structural schematic diagram of the magnetic levitation molecular pump involved in the present invention. As an embodiment of the present invention, the method for measuring the rotor levitation center of the magnetic levitation molecular pump driven by the permanent magnet motor includes the following steps:
[0032] Step S01, using the rotor of the magnetic levitation molecular pump without the rotor magnet of the motor as a test rotor, and loading the test rotor into the molecular pump;
[0033] Step S02 obtains the radial suspension center of the test rotor: first, place the magnetic levitation molecular pump vertically, put the test rotor into the magnetic levitation molecular pump, use the magnetic levitation molecular pump controller 20 to control the static levitation of the test rotor, and obtain the first The electric current in each magnetic pole coil of radial magnetic bearing 6; Then, compare whether the current amplitudes...
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