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A permanent magnet brushless double-rotor motor

A dual-rotor motor, permanent magnet brushless technology, applied in electrical components, electromechanical devices, synchronous machine parts, etc., can solve the problems of weakened mechanical strength, difficult heat dissipation, commutation loss, etc. , the effect of reducing the amplitude

Pending Publication Date: 2019-01-15
BOZHON PRECISION IND TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the motor is a brushed motor, which inevitably brings problems such as commutation loss and noise.
Both the inner and outer rotors of the permanent magnet brushless dual-rotor motor are mounted with permanent magnets, which will bring about the disadvantages of difficult heat dissipation and weakened mechanical strength

Method used

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  • A permanent magnet brushless double-rotor motor
  • A permanent magnet brushless double-rotor motor
  • A permanent magnet brushless double-rotor motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] as attached figure 1 As shown, a permanent magnet brushless dual-rotor motor includes a casing 1, a shaft 2, a bearing 3, an outer salient pole rotor 4, an inner salient pole rotor 5, a stator 6, an armature winding 7 and a permanent magnet 8; The shaft 2 passes through the casing 1; a bearing 3 is arranged between the rear end of the casing 1 and the shaft 2; inside the casing 1, an inner salient pole rotor 5, Stator 6, outer salient pole rotor 4; as attached figure 2 , 3 As shown in and 4, the stator 6 is composed of several double "H"-shaped iron cores 61; permanent magnets 8 are arranged between the adjacent double "H"-shaped iron cores 61; The magnetization direction of the block permanent magnet 8 is opposite. In the figure, the direction of the arrow represents the magnetization direction of the permanent magnet; the stator 6 faces the outer salient pole rotor 4 side is the stator outer tooth 62; the stator 6 faces the inner salient pole On one side of the ro...

Embodiment 2

[0036] The structure of a permanent-magnet brushless double-rotor motor is the same as that in Embodiment 1, except that auxiliary slots 9 are formed on the stator outer teeth 63 and the stator inner teeth 63; Figure 6It is a schematic diagram showing the double "H" type iron core of Example 2. In order to prevent the slotting of the stator outer teeth 62 and the stator inner teeth 63 from introducing new harmonics, the opened auxiliary slots 9 will be strictly symmetrical along the centerline of the stator teeth. In addition, the number of auxiliary slots 9 on each stator tooth is not only one as shown in the figure. After analysis, on the premise of ensuring the performance of the motor, by having auxiliary slots 9 on the stator outer teeth 62 and stator inner teeth 63, the order of the lowest harmonic of the motor cogging torque can be increased, thereby effectively reducing the permanent The cogging torque of the magnetic brushless dual-rotor motor reduces vibration and ...

Embodiment 3

[0038] A permanent magnet brushless double rotor motor, comprising a casing 1, a shaft 2, a bearing 3, an outer salient pole rotor 4, an inner salient pole rotor 5, a stator 6, an armature winding 7 and a permanent magnet 8; the shaft 2 wears through the casing 1; a bearing 3 is arranged between the rear end of the casing 1 and the shaft 2; inside the casing 1, an inner salient pole rotor 5, a stator 6, The outer salient pole rotor 4; the stator 6 consists of several double "H"-shaped iron cores 61; permanent magnets 8 are arranged between the adjacent double "H"-shaped iron cores 61; the and adjacent The magnetization directions of the two permanent magnets 8 are opposite. In the figure, the direction of the arrow represents the magnetization direction of the permanent magnets; the stator 6 faces the outer salient pole rotor 4 side is the stator outer teeth 62; the stator 6 faces the inner convex On one side of the pole rotor 5 are stator inner teeth 63; the connecting portio...

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Abstract

The invention discloses a permanent magnet brushless double-rotor motor, which comprises a casing, a shaft, a bearing, an outer salient pole rotor, an inner salient pole rotor, a stator, an armature winding and a permanent magnet. The shaft passes through the casing; A bearing is arranged between the shell and the shaft; Inside the casing, an inner salient-pole rotor, a stator and an outer salient-pole rotor are sequentially arranged from the inside to the outside in the radial direction of the shaft; The stator consists of several double H type iron cores. Permanent magnets are arranged between adjacent double H-shaped iron cores; Stator external teeth are arranged on the outside of the stator; Stator internal teeth are arranged on the inner side of the stator; An external armature winding is arranged between the external teeth of the stator; An internal armature winding is arranged between the internal teeth of the stator. The invention has the advantages of good continuity, high stability and good fault tolerance, is suitable for high-speed occasions, and is favorable for direct cooling of the permanent magnet. The fractional slot concentrated winding is used to reduce the copper consumption and improve the EMF waveform. The auxiliary groove improves the lowest harmonic frequency of the motor tooth groove torque, and achieves the purpose of restraining the tooth groove torque.

Description

technical field [0001] The invention relates to a motor, in particular to a brushless double-rotor motor. Background technique [0002] At present, the mainstream permanent magnet double-rotor motors are divided into two types: one is to use the principle of action force and reaction force, the stator of the traditional motor is used as the outer rotor, and the original rotor is used as the inner rotor. motor; the other is a permanent magnet brushless dual rotor motor with inner and outer rotors and a stator sandwiched between the two rotors. The counter-rotating permanent magnet dual-rotor motor can replace a mechanical gearbox with a fixed speed ratio, and when used with an internal combustion engine, it can achieve the effect of energy saving and emission reduction. However, the motor is a brushed motor, which inevitably brings problems such as commutation loss and noise. Both the inner and outer rotors of the permanent magnet brushless dual-rotor motor are mounted with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K16/02H02K21/02
CPCH02K16/02H02K21/02
Inventor 孟健汪奇付江波吉晓凯曹君候伟邹春花
Owner BOZHON PRECISION IND TECH CO LTD
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