Rotor structure and variable-frequency motor thereof

A technology of rotor structure and variable frequency motor, which is applied in the direction of AC motor control, magnetic circuit shape/style/structure, electric components, etc., can solve the problems of bad influence of motor control system accuracy, influence of motor vibration and noise, etc.

Pending Publication Date: 2021-03-19
比泽尔旋转压缩机(江苏)有限公司
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AI Technical Summary

Problems solved by technology

[0002] In the interior permanent magnet motor, the interaction between the magnetic field generated by the permanent magnet and the stator cogging produces cogging torque, which makes the output torque of the motor fluctuate, especially for the fractional slot permanent magnet motor, the torque caused by the cogging torque is more If it is prominent, it will adversely affect the accuracy of the motor control system and affect the vibration and noise of the motor

Method used

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  • Rotor structure and variable-frequency motor thereof
  • Rotor structure and variable-frequency motor thereof
  • Rotor structure and variable-frequency motor thereof

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Embodiment Construction

[0022] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0023] see Figure 1-Figure 8 , the present invention provides a technical solution: a rotor structure, including a rotor main body 1, a plurality of magnetic steel slot holes 2 are opened on the rotor main body 1, and two magnetic steel slot holes 2 are opened outside each magnetic steel slot hole 2 for reducing the diameter. The circular arc cut 3 of the magnetic density harmonic content, and the two circular arc cuts 3 are symmetrical about the center line of the magnetic steel slot 2 .

[0024] The present invention also provides a variable frequency motor for the rotor main body 1. The variable frequency motor adopts a structure of 9 slots and 6 poles. In the variable frequency motor, the stator 5 is sleeved on the periphery of the rotor main...

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Abstract

The invention provides a rotor structure which comprises a rotor body. A plurality of magnetic steel slotted holes are formed in the rotor body, two arc notches used for reducing the radial flux density harmonic content are formed in the outer side of each magnetic steel slotted hole, and the two arc notches are symmetrical about the center line of the magnetic steel slotted hole. Aiming at the improvement of the rotor structure, in the radial air gap flux density of the motor, generated harmonic waves, especially fifth harmonic waves and seventh harmonic waves, are also improved, cogging waves are greatly weakened, and the electromagnetic noise of the motor is improved. For the improvement of motor harmonics, a power grid is also improved to a certain extent. And the back electromotive force waveform of the motor is also improved and is more sinusoidal, so that the control of the variable-frequency controller is facilitated.

Description

technical field [0001] The invention relates to the technical field of DC brushless frequency conversion motors for compressors. Background technique [0002] In the interior permanent magnet motor, the interaction between the magnetic field generated by the permanent magnet and the stator cogging produces cogging torque, which makes the output torque of the motor fluctuate, especially for the fractional slot permanent magnet motor, the torque caused by the cogging torque is more If it is prominent, it will adversely affect the accuracy of the motor control system and affect the vibration and noise of the motor. The cogging torque of the variable frequency motor has always been the focus and core of the research of the variable frequency motor industry. Solve the above-mentioned problems. Contents of the invention [0003] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a rotor structure to solve the problems raised in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27H02K1/28H02K1/16H02P27/04
CPCH02K1/165H02K1/274H02K1/28H02K2213/03H02P27/047
Inventor 尹伟锋张青王小平
Owner 比泽尔旋转压缩机(江苏)有限公司
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