Permanent magnet synchronous motor rotor and permanent magnet synchronous motor

A permanent magnet synchronous motor and rotor technology, which is applied in the direction of synchronous machine parts, magnetic circuit rotating parts, magnetic circuit shape/style/structure, etc., can solve high cogging torque, performance degradation of permanent magnet synchronous motor, air The problem of high harmonic content of load back EMF can be achieved to improve performance, optimize the waveform of air gap magnetic field, and reduce the effect of harmonic content

Active Publication Date: 2018-03-30
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] The invention provides a permanent magnet synchronous motor rotor and a permanent magnet synchronous motor, which are used to solve the problem that the air gap magnetic field waveform of the current permanent magnet synchronous motor rotor is far from sinusoidal distribution, resulting in high cogging torque and high no-load back EMF harmonic content. The problem of performance degradation of permanent magnet synchronous motor

Method used

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  • Permanent magnet synchronous motor rotor and permanent magnet synchronous motor
  • Permanent magnet synchronous motor rotor and permanent magnet synchronous motor
  • Permanent magnet synchronous motor rotor and permanent magnet synchronous motor

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Embodiment 1

[0023] figure 1 It is a partial structural schematic diagram of the permanent magnet synchronous motor rotor according to Embodiment 1 of the present invention, as figure 1 As shown, the permanent magnet synchronous motor rotor includes: a rotor core 1 and a magnetic circuit assembly 2, wherein the magnetic circuit assembly 2 includes two tangential permanent magnets 21 distributed in the radial direction, and the tangential permanent magnets 21 are arranged in the permanent magnet slots 3, the same polarity of the two tangential permanent magnets 21 is opposite, a radial permanent magnet 22 is arranged between the two tangential permanent magnets 21 and near the inner side of the rotor core 1, and the radial permanent magnet 22 faces One side of the stator has the same polarity as the opposite side of the two tangential permanent magnets 21, and the radial cross-sectional shape of the rotor core 1 is composed of arcs 4 and straight lines 5, wherein the part close to the tange...

Embodiment 2

[0028] This embodiment is a supplementary description based on the first embodiment.

[0029] figure 2 It is a partial structural schematic diagram of the permanent magnet synchronous motor rotor according to Embodiment 2 of the present invention, as figure 2 As shown, the rotor of the permanent magnet synchronous motor also includes an auxiliary hole 6 , and the auxiliary hole 6 is arranged between two tangential permanent magnets 21 .

[0030] Further, the auxiliary hole 6 is trapezoidal. image 3 It is a schematic diagram of the positional relationship between the components of the permanent magnet synchronous motor rotor according to Embodiment 2 of the present invention, as image 3 As shown, by adjusting the height h of the trapezoid and the angle θ between the two waists 4 and the minimum distance b from the trapezoid to the surface of the rotor core 1 can optimize and adjust the air gap magnetic field waveform of the permanent magnet synchronous motor rotor, makin...

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Abstract

The invention provides a permanent magnet synchronous motor rotor and a permanent magnet synchronous motor. The permanent magnet synchronous motor rotor includes: a rotor core and a magnetic circuit assembly, wherein the magnetic circuit assembly includes two tangential permanent magnets distributed in the radial direction, and the tangential The directional permanent magnet is arranged in the permanent magnet groove, the same polarity of the two tangential permanent magnets is opposite, and a radial permanent magnet is arranged between the two tangential permanent magnets and near the inner side of the rotor core, and the radial permanent magnet The side of the magnet facing the stator has the same polarity as the opposite side of the two tangential permanent magnets, and the radial cross-sectional shape of the rotor core is composed of arcs and straight lines, wherein the part close to the tangential permanent magnets is a straight line. The rotor of the permanent magnet synchronous motor and the permanent magnet synchronous motor provided by the present invention, because the radial cross-sectional shape of the rotor iron core is not a perfect circle, but is composed of arcs and straight lines, the air gap structure of the rotor is uneven, thereby optimizing the air gap The magnetic field waveform makes it close to the sinusoidal distribution, improving the performance of the permanent magnet synchronous motor.

Description

technical field [0001] The invention relates to the technical field of permanent magnet synchronous motors, in particular to a permanent magnet synchronous motor rotor and a permanent magnet synchronous motor. Background technique [0002] The rotor magnetic circuit structure of permanent magnet synchronous motors is the key technology of permanent magnet synchronous motors. At present, domestic permanent magnet synchronous motors are mainly used in traction fields such as railway locomotives, bullet trains and electric vehicles. Because the traction field not only requires permanent magnet synchronous motors to be small in size and weight It is also required to meet the unique working characteristics of traction, so the design of the magnetic circuit structure of the permanent magnet synchronous motor rotor is particularly important. [0003] The harmonic components contained in the air-gap magnetic field generated by the rotor magnetic circuit structure of the permanent ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/27H02K21/02
Inventor 冯江华许峻峰史俊旭符敏利陈致初李益丰彭俊杨金霞邹煜林冯守智
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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