Non-uniform air gap built-in V-shaped permanent magnet motor rotor structure
A permanent magnet motor and rotor structure technology, applied in the direction of magnetic circuit shape/style/structure, magnetic circuit rotating parts, etc., can solve problems such as increased vibration and operating noise, increased torque ripple, and decreased permanent magnet flux. Achieve the effect of reducing flux leakage, reducing cogging torque and torque ripple, reducing eddy current loss and iron loss
Active Publication Date: 2019-05-31
JIANGSU UNIV
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Problems solved by technology
However, the design of non-uniform air gap often leads to the decrease of permanent magnet flux and low utilization rate of permanent magnet, and the unreasonable salient pole design often leads to the increase of cogging torque and torque ripple, which in turn increases vibration and running noise
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[0023] The present invention will be further elaborated below by specific embodiment:
[0024] The invention relates to a rotor structure of a V-shaped permanent magnet motor with a built-in non-uniform air gap. ); the large salient pole structure and the small salient pole structure are connected through connecting arcs (2); several large salient pole structures, small salient pole structures and arcs form the outer circle of the rotor. A V-shaped groove (such as Figure 4 shown);
[0025] Such as Figure 1-2 As shown, the large salient pole structure is composed of three arcs: arc 1 (1-1), arc 2 (1-3) and arc 3 (1-2), and arc 2 (1-3 ) is located in the middle, and arc 1 (1-1) and arc 3 (1-2) are located at both ends. The radii of the arc 1 (1-1) and the arc 2 (1-3) are R3, the center angles are a3, and the centers are O3-1 and O3-2 respectively; the centers O3-1 and O3-2 is on the arc line with the center O1 and the radius R4, and its center angle is a4; the radius of t...
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The invention discloses a non-uniform air gap built-in V-shaped permanent magnet motor rotor structure. The excircle of a rotor is composed of two types of salient pole structures, namely a large salient pole structure (1) and a small salient pole structure (3); the large salient pole structure is connected with the small salient pole structure via an arc (2); and multiple large salient pole structures, small large salient pole structures and arcs form the rotor excircle. and V-shaped grooves are arranged under the large salient pole structures respectively, a crotch magnetic isolated groove is arranged in the top end of the V shape, and a reinforcing rib is arranged between the adjacent V-shaped grooves. Compared with a present built-in V-shaped permanent magnet motor, the salient pole rate is increased, the magnetic resistance torque is fully used, magnetic flux leakage is reduced, and the utilization rate of permanent magnets is improved; and magnetic flux density and harmonic wavesof the air gap of the motor are improved, the gullet torque and torque ripples are reduced, the iron core loss and eddy current loss are reduced effectively, and the motor efficiency and power density are improved.
Description
technical field [0001] The invention relates to a rotor structure of a permanent magnet motor, in particular to a non-uniform air gap permanent magnet motor with a built-in "V"-shaped permanent magnet in the rotor, which is suitable for applications such as compressors, air conditioners, electric tools and electric vehicles, and belongs to the motor technology field. Background technique [0002] With the development of permanent magnet material technology, permanent magnet motors are more and more widely used in various fields of human production and life. Due to the remarkable characteristics of high efficiency, high power density, high reliability, and various structural designs, permanent magnet motors have been greatly developed, and the optimal design of the permanent magnet motor structure can maximize its performance and efficiency. . [0003] The built-in V-shaped permanent magnet motor is a common built-in permanent magnet motor. Since the permanent magnet is emb...
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IPC IPC(8): H02K1/27H02K1/24
Inventor 徐磊华亦峰朱孝勇张超段璐瑶
Owner JIANGSU UNIV