Gree Electric Appliances, Inc. of Zhuhai

Gree Green Refrigeration Technology Center Co., Ltd. of Zhuhai

Green Refrigeration Equipment Engineering Research Center of Zhuhai Gree Co., Ltd.

Gree Green Refrigeration Technology Center Co.,ltd

Dongsuo Chen

Hui Huang

Yusheng Hu

Yong Xiao

Wenming Zhang

Xueying Zeng

Huajie Chen

Fang Zhang

Xiaobo Zhang

Weilin Guo

Jianning Liu

Daofu Hu

Yan Li

A shaft control method and device for a magnetic suspension system. The shaft control method for the magnetic suspension system includes: acquiring a displacement signal obtained by detecting displacement of a shaft in the magnetic suspension system (Step); separating whirling displacement from the displacement signal (Step); and controlling whirling of the shaft according to the whirling displacement (Step). By the disclosure, the effect of suppressing the whirling of the shaft during high-speed rotation of the magnetic suspension system is achieved.

Shaft control method and device for magnetic suspension system

Disclosed are a magnetic bearing and a centrifugal compressor. The magnetic bearing comprises a revolving shaft () and an electromagnetic component, wherein the electromagnetic component is arranged around an outer periphery of the revolving shaft (), and a gap is formed between the electromagnetic component and the revolving shaft () for adjusting a position of the revolving shaft (). The electromagnetic component comprises an iron core () with a winding slot, and coils (). The coils () are arranged in the winding slot. The magnetic bearing () also comprises a protection mechanism (), which is configured to prevent the revolving shaft () from colliding with the electromagnetic component, thereby achieving the purpose of axially protecting the magnetic bearing (). The centrifugal compressor comprises the magnetic bearing (), thereby obtaining axial protection and prolonging service life.

Magnetic bearing and centrifugal compressor

A motor and a rotor thereof are provided. Taking the distance between the two endpoints of a permanent magnet of a motor rotor that are on the side away from the center of an iron core as the length L of the permanent magnet, and the distance between a line connecting the two endpoints of the permanent magnet that are on the side away from the center of the iron core and the center point on the side of the permanent magnet that is close to the centerline of the iron core as the width H of the permanent magnet, then H/L &#x2267; 1/10. By adjusting the relationship between the length L and width H of the permanent magnet, the air gap magnetic density of the permanent magnet can be effectively increased.

Motor and rotor thereof

A motor rotor includes an iron core and permanent magnets provided inside the iron core. The iron core is provided with sets of mounting grooves on the iron core in the peripheral direction of the iron core, each set of mounting grooves having two or more mounting grooves provided intermittently in the radial direction of the iron core. There are sets of permanent magnets, the individual permanent magnet of each set of permanent magnets correspondingly being embedded into the individual mounting grooves of each set of mounting grooves; there is an island region between the outermost layer of mounting grooves and the periphery of the iron core, and an enhancing hole is provided in the island region, an enhancing rod being provided in the enhancing hole. A motor includes a motor stator and the motor rotor, with the motor rotor provided inside the motor stator.

Motor rotor and motor having same

A motor rotor includes an iron core and a permanent magnet arranged inside the iron core, wherein, a plurality of groups of mounting grooves are arranged in the iron core in a circumferential direction of the iron core, and each group of mounting grooves comprises two or more than two mounting grooves arranged at intervals in a radial direction of the iron core; and a plurality of groups of permanent magnets are provided, and each permanent magnet in each group of permanent magnets is correspondingly embedded in the corresponding mounting groove of each group of mounting grooves. A motor having the motor rotor is further provided, and the magnetic reluctance torque of the motor rotor is increased, thereby increasing the output torque of the motor and the efficiency of the motor.

A permanent magnet synchronous electric machine includes a stator and a rotor. Multiple wire grooves are provided peripherally on the stator, coils are provided within the wire grooves, and a stator tooth is provided between adjacent wire grooves. Multiple magnetic groove sets are provided peripherally within the rotor, each of the magnetic groove sets includes at least two magnetic steel grooves, with permanent magnets placed within the magnetic steel grooves, and a magnetic tunnel formed between the magnetic steel grooves. Of two adjacent magnetic tunnels, an end of one magnetic tunnel is opposite a wire groove and an end of the other magnetic tunnel is opposite a stator tooth. The permanent magnet synchronous electric machine has a more steady output torque, and also reduces the noise and vibration provided during operation.

Growing community of inventors

Guangdong, China

Dongsuo Chen