Permanent magnet motor and compressor having the same
A permanent magnet motor and permanent magnet technology, applied in the field of compressors, can solve problems such as poor speed expansion range and motor performance degradation, and achieve the effect of improving performance and expanding speed expansion range
Active Publication Date: 2019-07-12
GUANGDONG MEIZHI COMPRESSOR
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Problems solved by technology
When the motor rotates at a high speed, the performance of the motor is degraded due to the weakening of the magnetic field, and the speed expansion range is poor.
Method used
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Embodiment Construction
[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0035] A motor with a variable leakage flux structure (VLF) is proposed in the related art. This structure is predicted to have the effect of improving high-speed performance and increasing the speed expansion range in the application occasions of low-speed high-torque and high-speed low-torque. However, in compressor applications, the speed and load do not meet the characteristics of high torque at low speed and low torque at high speed, and the application of motors in the related art to compressors has no obvious effect.
[0...
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The invention discloses a permanent magnet motor and a compressor with the same. The permanent magnet motor comprises a stator and a rotor. The rotor is arranged on the inner side of the stator. An air gap is formed in a gap between the stator and the rotor. The rotor comprises a rotor core, a plurality of permanent magnet grooves distributed in the peripheral direction of the rotor core at intervals are formed in the rotor core, permanent magnets are arranged inside the permanent magnet grooves, the multiple permanent magnets are provided with multiple N / S alternated poles, each pole is composed of at least two permanent magnets; a magnetic flux changing assembly is arranged between at least two permanent magnets in the multiple N / S alternated poles, and the permanent magnet poles on the two sides of the magnetic flux changing assembly in the peripheral direction of the rotor core are the same. According to the permanent magnet motor, the magnetic flux changing assembly is arranged between the at least two permanent magnets in the multiple N / S alternated poles, and the permanent magnet poles on the two sides of the magnetic flux changing assembly in the peripheral direction of the rotor core are the same. Due to the magnetic flux changing assembly, the speed increasing range of the permanent magnet motor is enlarged, and the performance of the permanent magnet motor is improved.
Description
technical field [0001] The invention relates to the technical field of compressors, in particular to a permanent magnet motor and a compressor having the same. Background technique [0002] In related technologies, in the application field of compressors, full-band high performance is an important direction of motor design. However, at high speeds, the motor's performance is degraded due to magnetic field weakening, and the range of speed expansion is poor. Contents of the invention [0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. Therefore, an object of the present invention is to provide a permanent magnet motor with a large speed expansion range and improved performance. [0004] Another object of the present invention is to provide a compressor, which is provided with the above-mentioned permanent magnet motor. [0005] According to the permanent magnet motor of the embodiment of the first as...
Claims
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IPC IPC(8): H02K21/14H02K21/02H02K1/27
CPCH02K1/2773H02K21/022H02K21/14H02K2213/03
Inventor 乔正忠于明湖
Owner GUANGDONG MEIZHI COMPRESSOR