A modular permanent magnet motor

A permanent magnet motor, modular technology, applied in the direction of magnetic circuit, electromechanical device, electrical components, etc., can solve the problems of increasing the torque ripple of the motor and affecting the electromagnetic performance of the motor output

Active Publication Date: 2021-07-06
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the above-mentioned patents and documents, permanent magnets are alternately arranged to overcome the defects of traditional surface-mounted permanent magnet motors, saving the use of permanent magnet materials and protective sleeves. In the phase winding of the alternating pole motor, even-order harmonics of the back EMF will be induced, thereby increasing the torque ripple of the motor and affecting the output electromagnetic performance of the motor

Method used

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  • A modular permanent magnet motor
  • A modular permanent magnet motor
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Embodiment Construction

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] like figure 1 As shown, it is a permanent magnet motor structure in the prior art. The permanent magnet motor is a traditional wheel hub motor, including a stator core 3' with evenly distributed stator teeth and an alternating pole rotor core 1'. All permanent magnets 2' are filled with The magnetic directions are the same, that is, they all point to the outside of the rotor or the stator side. The modular stator core 3' includes a plurality of stator module units 31', and each stator module unit 31' includes three stator tooth blocks 311', and each stator module The three stator tooth blocks 311' on the unit 31' are all wound with A+, B+, C+ winding coils 4' in the counterclockwise direction (that is, the winding coils 4' on all modular stator cores are wound in the positive direction) , so that each modular stator forms a phase seque...

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Abstract

A modular permanent magnet wheel hub motor includes a rotor and a stator, characterized in that: the rotor includes a rotor iron core and a permanent magnet, and the stator includes a stator iron composed of at least two or more modular stator units Core, a magnetic bridge is formed between adjacent modular stator units, and the winding directions of the armature windings on the adjacent modular stator units are opposite and belong to the same phase. The space is 180 degrees away from each other. . The advantages of the present invention lie in: setting the magnetic bridge and improving the arrangement of the armature windings to eliminate the back-EMF even harmonics of the armature windings, thereby improving the output torque performance of the motor; using the large slot structure generated by the magnetic bridge to arrange the auxiliary windings, Helps to further improve the torque and power density of the motor.

Description

technical field [0001] The invention relates to a permanent magnet motor structure, in particular to a modular permanent magnet motor. Background technique [0002] Due to the use of rare earth permanent magnet materials, permanent magnet motors have the advantages of high torque density, high power density and high efficiency, and are especially suitable for transmission systems such as new energy vehicles and wind power generation. The permanent magnet hub motor adopts the structure of the outer rotor and the inner stator. It is widely used in the automobile distributed drive system because the intermediate mechanical transmission system is omitted. However, the permanent magnets of this type of outer rotor permanent magnet hub motor are generally placed on the outer rotor. In general, the permanent magnet needs to be pasted around the inside of the outer rotor, and the amount of permanent magnet is large, which makes the cost of the motor higher. [0003] In order to red...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/14H02K3/18H02K3/28H02K1/24H02K1/27
CPCH02K1/148H02K1/24H02K1/2786H02K3/18H02K3/28H02K2213/03H02K2213/12
Inventor 王凯李烽孙海阳
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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