公开(公告)号：US12212257B2

公开(公告)日：2025-01-28

申请号：US18118968

申请日：2023-03-08

Applicant: Raytheon Company

Inventor： Andrew Christopher Walecka ,  Gary Joseph Sutton

IPC: H02K7/02 ,  G01B7/30 ,  G01D5/14 ,  H02P21/13 ,  H02P21/18

Abstract: A Permanent Magnet Synchronous Motor (PMSM) includes a hollow cylindrical stator with stator windings and a magnetic rotor having M pole pairs arranged to rotate around a rotational axis in the stator by a rotor shaft. The stator windings are energized to generate a magnetic rotational field in dependence upon the rotational position of the magnetic rotor. Two or more analog magnetic flux sensors are positioned within the hollow cylindrical stator and arranged concentrically with respect to the rotational axis around the stator at a constant mechanical angle equal to a constant electrical angle divided by M relative to each other. The magnetic flux sensors are spaced directly from the magnetic rotor by a radial gap (X) in such a way that the magnetic flux of the magnetic rotor impinges on the analog magnetic flux sensors without obstruction to output two or more sinusoidal signals with phases separated by the constant electrical angle that can be evaluated to determine the rotational position of the magnetic rotor. Sensor integration eliminates the additional sense magnet, Hall sensors and CCA positioned external to the motor housing to provide a smaller motor package at lower cost. Integration also facilitates the use of the PMSM in high-temperature or high-shock (high g) environments such as gun-launched guided projectiles or hypersonic missiles.

公开(公告)号：US20240305230A1

公开(公告)日：2024-09-12

申请号：US18118968

申请日：2023-03-08

Applicant: Raytheon Company

Inventor： Andrew Christopher Walecka ,  Gary Joseph Sutton

IPC: H02P21/18 ,  G01B7/30 ,  G01D5/14 ,  H02P21/13

CPC classification number: H02P21/18 ,  G01B7/30 ,  G01D5/14 ,  H02P21/13 ,  H02P2207/055

Abstract: A Permanent Magnet Synchronous Motor (PMSM) includes a hollow cylindrical stator with stator windings and a magnetic rotor having M pole pairs arranged to rotate around a rotational axis in the stator by a rotor shaft. The stator windings are energized to generate a magnetic rotational field in dependence upon the rotational position of the magnetic rotor. Two or more analog magnetic flux sensors are positioned within the hollow cylindrical stator and arranged concentrically with respect to the rotational axis around the stator at a constant mechanical angle equal to a constant electrical angle divided by M relative to each other. The magnetic flux sensors are spaced directly from the magnetic rotor by a radial gap (X) in such a way that the magnetic flux of the magnetic rotor impinges on the analog magnetic flux sensors without obstruction to output two or more sinusoidal signals with phases separated by the constant electrical angle that can be evaluated to determine the rotational position of the magnetic rotor. Sensor integration eliminates the additional sense magnet, Hall sensors and CCA positioned external to the motor housing to provide a smaller motor package at lower cost. Integration also facilitates the use of the PMSM in high-temperature or high-shock (high g) environments such as gun-launched guided projectiles or hypersonic missiles.