Patent ID: 11863033
Assignee: NINGBO INSTITUTE OF TECHNOLOGY, BEIHANG UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC H  F  G | IPC G  H

Claim 0:
1. A displacement detection circuit of a maglev rotor system, comprising:
a current sampling circuit configured to collect a current flowing through corresponding coils, wherein the coils comprise coils distributed in series in the maglev rotor system;
Hall sensors, wherein the Hall sensors are arranged in an upper auxiliary air gap and a lower auxiliary air gap of the maglev rotor system, and wherein sensing surfaces of the Hall sensors are perpendicular to magnetic field directions in the corresponding auxiliary air gaps;
a Hall signal processing circuit connected to the Hall sensors and configured to perform differential processing on 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, wherein the displacement signal resolving circuit is configured to acquire a displacement of a rotor in the maglev rotor system based on the current and a result of the differential processing.