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A torque adaptive continuously variable permanent magnet inner rotor brushless motor

A brushless motor, self-adaptive technology, applied in the direction of magnetic circuit rotating parts, electrical components, electromechanical devices, etc., can solve problems such as difficult matching, and achieve the effect of less iron loss, high efficiency and less iron loss

Active Publication Date: 2018-07-24
重庆西伟迪磁电动力科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the change of centrifugal force is non-linear, and the spring is usually linear, it is not easy to achieve precise matching

Method used

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  • A torque adaptive continuously variable permanent magnet inner rotor brushless motor
  • A torque adaptive continuously variable permanent magnet inner rotor brushless motor
  • A torque adaptive continuously variable permanent magnet inner rotor brushless motor

Examples

Experimental program
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Effect test

Embodiment Construction

[0015] Combine below figure 1 and figure 2 Explain the adjustment principle and speed change process.

[0016] The following is an example of vehicle drive to illustrate the working process of the present invention's self-adaptive continuous variable speed: figure 1 In the state shown, under the action of the spring, the stator is biased to the left, and a part of the magnetic flux of the permanent magnet of the rotor enters the magnetic flux shunt to form a circuit without passing through the core coil. If the magnetic flux aligned with the magnet part of the stator core coil is called effective Flux linkage, then the flux linkage is the minimum value at this time, that is, the initial state is the flux-weakening state.

[0017] After electrification, if the applied electric power is small, such as when the vehicle is started on a flat road with a light load, take the handlebar operation as an example, and the motor will start from a low-voltage state with a weak magnetic ...

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Abstract

The invention discloses a permanent magnet inner rotor brushless motor capable of continuously changing speed adaptively according to torque changes. The permanent magnet inner rotor brushless motor comprises an electric motor shaft, a rotor, a stator, a machine enclosure, an end cap and the like. The permanent magnet inner rotor brushless motor is characterized in that a mechanism capable of automatically adapting to torque changes to regulate magnetic flux size is arranged on the inner part of the rotor, wherein the mechanism is mainly composed of a spring measurement and control system and a spiral transmission pair; torque generated by stator current in rotator magnetic fields can be converted into axial component force in proportion, so that the stator carries out screw-feeding motion on the motor shaft, and therefore, the axial position, relative to the rotor, of the stator is changed; air gap magnetic flux is changed into a torque function from the original constant, so that the rotation speed is changed in an inversely proportional mode with the torque; and the output power is kept unchanged all the time, so that the brushless motor has self-adapted equal-power infinite variable speed characteristics according to multiple gear ratios. The permanent magnet inner rotor brushless motor realizes direct torque control effect by virtue of a simple and reliable method.

Description

technical field [0001] The invention relates to a permanent magnet brushless motor, especially a drive motor for vehicles. Background technique [0002] In recent years, in order to protect the environment and save energy, electric vehicles and technologies have been continuously innovated. Due to the excellent characteristics of rare earth magnetic materials and breakthroughs in manufacturing technology, brushless motors excited by strong magnetic permanent magnet materials are widely used. However, due to the fixed magnetic circuit structure of conventional permanent magnet brushless motors, the excitation strength cannot be adjusted in real time, so the speed regulation characteristics of electric excitation motors, especially the stepless speed regulation characteristics of lamp power, cannot be obtained. The driving motor of an electric vehicle just needs to have a wide speed regulation characteristic that is several times the rated speed within a certain power. In ord...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K29/14H02K11/20H02K1/27
Inventor 不公告发明人
Owner 重庆西伟迪磁电动力科技有限公司
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