Patent TW-202121797-A (TW)
Title: Automatic multistage driving control of permanent magnet synchronous motor with movable stator
Inventor: HUANG PO-YUAN
IPC: H02K1/12
Filed: 2019-11-29
Abstract: The present invention pertains to a novel electromechanical device of permanent magnet synchronous motor, which can use a fixed current to automatically increase the torque or reduce the torque of a motor in multiple stages. A movable stator device can be arranged inside a permanent magnet synchronous motor and a multi-stage automatic driving device can be arranged outside the permanent magnet synchronous motor to jointly form a permanent magnet synchronous motor with movable stator and multi-stage automatic driving control. The permanent magnet synchronous motor with movable stator and multi-stage automatic driving is provided with an N-pole permanent magnet, an S-pole permanent magnet and a rotating shaft. The movable stator device is provided with a three-pole main coil group and a three-pole sub coil group, and the multi-stage automatic driving device is provided with a micro-control circuit, and an electric actuator, etc. The permanent magnet synchronous motor with movable stator and multi-stage automatic driving can use a fixed AC power supply (fixed current) to supply power through the three-pole main coil group and the three-pole sub coil group, drive the N-pole permanent magnet and the S-pole permanent magnet to rotate by the electromagnetic action between the three-pole main coil group and both the N-pole permanent magnet and the S-pole permanent magnet, and drive a load to work by the rotating shaft. The permanent magnet synchronous motor with movable stator and multi-stage automatic driving can also use the stator magnetic field multi-stage change mechanism (forming a multi-stage automatic driving movable stator) formed by the three-pole sub coil group, the micro-control circuit, and the electric actuator, so that the intensity of electromagnetic action of the three-pole main coil set and the three-pole sub coil set with the N-pole permanent magnet and S-pole permanent magnet can be increased in a multi-stage mode, thereby increasing the torque of the rotating shaft in a multi-stage mode to automatically increase the torque rotation of the motor (fixed current to increase torque rotation), or the intensity of electromagnetic action of the three-pole main coil set and the three-pole sub coil set with the N-pole permanent magnet and S-pole permanent magnet can be decreased in a multi-stage mode, thereby decreasing the torque of the rotating shaft in a multi-stage mode to automatically decrease the torque rotation of the motor (fixed current to decrease torque rotation) and not affecting the current flow of the fixed AC power supply. In this way, in this invention, the permanent magnet synchronous motor with movable stator and multi-stage automatic driving control constructed by a permanent magnet synchronous motor, a movable stator device, and a multi-stage automatic driving device allows the movable stator device and the multi-stage automatic driving device to automatically increase the torque or reduce the torque of the motor in multiple stages, and supplies power to the permanent magnet synchronous motor with fixed AC power supply. By using this new concept of multi-stage automatic driving movable stator and fixed AC power supply, the electric consumption characteristics and purpose of the permanent magnet synchronous motor with automatically increase or decrease of the torque in multiple stages with a fixed current can be achieved.