Abstract: The disclosure provides a power control device, which comprises a bleeder circuit forming a first discharging path and an aux low-voltage (LV) power supply unit forming a second discharging path. The bleeder circuit is connected with a voltage-regulating capacitor stably maintaining the high-voltage (HV) level from a HV battery. The aux LV power supply unit is connected with the bleeder circuit and the voltage-regulating capacitor in parallel. The aux LV power supply unit provides an aux LV level to the driver, when the power system operates abnormally, the HV level is discharged through the first and second discharging path and/or a third discharging path formed by a driver and a motor.

Abstract: The invention relates to a nested winding for a slotless motor. The nested winding is formed by inner and outer windings which are nested together and have different inner and outer diameters, wherein the number of the inner and outer windings is n, same-phase coils are connected in parallel or in series, and the number n of the nested inner and outer windings is equal to or greater than two. Compared with the prior art, the nested winding has the following advantages: a potential difference between the coils connected in parallel can be effectively reduced, and accordingly, the loss of the winding is reduced, and the high-speed operating performance of the motor is improved.

Abstract: An image detection system includes a rod body having a detection terminal and a control terminal, and at least one fixing unit fixed at the rod body; a movement module, provided between the detection terminal and the control terminal; and a detection module, provided at the detection terminal of the rod body, the detection module comprising a plurality of imaging units, a detection unit and a control unit, wherein the imaging units are arranged at the detection terminal in a manner of surrounding the rod body, the imaging units obtain images inside the hole or the tube, the movement module moves the body inside the hole or the tube, and the detection unit obtains size and position information of a detection target, thereby achieving detection and measurement of damaged holes or cracks inside a hole or a tube, or conditions inside the hole or the tube.

Abstract: The invention relates to a nested winding for a slotless motor. The nested winding is formed by inner and outer windings which are nested together and have different inner and outer diameters, wherein the number of the inner and outer windings is n, same-phase coils are connected in parallel or in series, and the number n of the nested inner and outer windings is equal to or greater than two. Compared with the prior art, the nested winding has the following advantages: a potential difference between the coils connected in parallel can be effectively reduced, and accordingly, the loss of the winding is reduced, and the high-speed operating performance of the motor is improved.

Abstract: A permanent magnet motor is provided. The permanent magnet motor includes a stator having a central hole, a rotor disposed in the central hole, the stator core includes a plurality of winding grooves and a plurality of winding teeth each disposed between adjacent winding grooves, each of the winding teeth includes a pole shoe disposed at an inner end thereof, and the pole shoe has an inner end surface facing the rotor and including a circular arc segment in a middle of the inner end surface, the central hole has a center, the radian of the circular arc segment is greater than that of the central hole, and the circle center of the circular arc segment does not coincide with the center of the central hole.