Beihang University

Yun Le

Kun Wang

Di Wang

Kun Mao

Shiqiang Zheng

Jiye Zhao

Tong Wen

Shitong Wei

Jiqiang Tang

Jinji Sun

The present disclosure provides a displacement detection circuit of a maglev rotor system and a displacement self-sensing system thereof. The displacement detection circuit comprises a current sampling circuit () configured to collect a current flowing through a corresponding coil (); coils (), which are coils () distributed in series in the maglev rotor system; Hall sensors (), the Hall sensors () being arranged in an upper auxiliary air gap () and a lower auxiliary air gap () of the maglev rotor system, and sensing surfaces of the Hall sensors () being perpendicular to magnetic field directions in the corresponding auxiliary air gaps (); a Hall signal processing circuit () connected to the Hall sensors () and configured to differentiate a Hall sensing signal corresponding to the upper auxiliary air gap () and a Hall sensing signal corresponding to the lower auxiliary air gap (); and a displacement signal resolving circuit () connected to the current sampling circuit () and the Hall signal processing circuit () respectively and configured to acquire a displacement of a rotor in the maglev rotor system according to the current and a differentiation result. By using the detection circuit and the displacement self-sensing system thereof, the axial size of the rotor is reduced, such that detection and control are coplanar, and high precision and simple design are realized.

Displacement detection circuit of maglev rotor system and displacement self-sensing system thereof

A magnetically suspended control moment gyroscope comprising: a gimbal; a flywheel system, set in the gimbal; wherein the flywheel system comprises: a housing; a shaft, arranged in an inner cavity of the housing; a radial magnetic bearing, comprising: a first rotor portion and a first stator portion fixed to the shaft; an upper axial magnetic bearing and a lower axial magnetic bearing, wherein the upper axial magnetic bearing is fixed to an upper end of the first stator portion, the lower axial magnetic bearing is fixed to a lower end of the first stator portion; a wheel body, set in the radial magnetic bearing, fixed to the first rotor portion; an upper axial thrust plate and a lower axial thrust plate, wherein the upper axial thrust plate is fixed to an upper end of the wheel body, and is on an upper end of the upper axial magnetic bearing, the lower axial thrust plate is fixed to a lower end of the wheel body, and is under a lower end of the lower axial magnetic bearing.

Single-gimbal magnetically suspended control moment gyroscope

Growing community of inventors

Beijing, China

Yun Le