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Permanent magnetic brushless speed-changing motor for electric vehicle and method thereof

A permanent magnet brushless, variable speed motor technology, applied in the direction of electric components, electrical components, electromechanical devices, etc., can solve the problem of unsatisfactory magnetic field weakening effect, and achieve the effect of simple mechanism, broad application prospect and reliable operation

Inactive Publication Date: 2013-01-09
杨荷
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The field weakening effect is not ideal for ordinary permanent magnet brushless motors

Method used

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  • Permanent magnetic brushless speed-changing motor for electric vehicle and method thereof
  • Permanent magnetic brushless speed-changing motor for electric vehicle and method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] The utility model is further described in conjunction with the accompanying drawings, and the manufacturing technology of this device is very clear to those skilled in the art.

[0015] see figure 1 , The stator of the motor is composed of a winding 4 and a stator core 5, and the stator core is connected to the casing with interference. The casing includes a left box body 26 and a motor cover 27 . The motor shaft 1 is connected to the casing through the first bearing 12 and the second bearing 13, and the motor rotor bracket 8, the magnetic flux shunt 2, and the thrust plate 10 are connected on the shaft; the motor rotor is composed of a permanent magnet 6, a rotor core 7, and a rotor bracket 8 components; the rotor bracket and the motor shaft are connected by splines, which can drive the shaft to rotate and slide axially; the left end shaft of the rotor is provided with a magnetic flux shunt 2, and there is a spring 3 between them; the right end of the rotor is a centr...

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PUM

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Abstract

The invention relates to a driving motor of an electric vehicle, in particular to a motor of an electric bicycle and an electric motor cycle which can realize automatic stepless speed change. The driving motor is characterized in that a permanent brushless speed-changing motor consists of a motor, a centrifugal rotating speed sensing magnetic adjusting mechanism and a speed reducer; one end of a motor shaft is connected with a flux shunt 2 which rotates with a rotor, and a spring is arranged between the flux shut 2 and the rotor; the other end of the motor shaft is connected with a thrust disc 10 which is a conical surface round disc; a plurality of wedge-shaped spaces distributed radially are formed between the inner surface of the round disc and a bracket 8; the middle part is placed with a centrifugal roller 9; and the motor shaft 1, the rotor bracket 8, the centrifugal roller 9 and the thrust disc 10 form a centrifugal mechanism. Compared with the prior art and mechanical shift-changing regulation, the driving motor adopts continuous stepless speed regulation, has higher efficiency than that of the mechanical CVT stepless regulation (the efficiency of 60 percent to 70 percent)by more than 20 percent, and is more suitable for the common hidden board type rotor compared with the electric control weak magnetism ratio. The basic method is as follows: a flux shut mechanism is added in the motor so as to achieve the purpose of increasing the speed by weak magnetism and realize ideal driving characteristic. Due to simple mechanism and reliable working, the driving motor has very wide application prospect.

Description

technical field [0001] The invention relates to an electric vehicle drive motor, in particular to an electric bicycle and electric motorcycle motor capable of automatic stepless speed change. Background technique [0002] Due to the compact structure of permanent magnet brushless motors, small size, high power and high efficiency, and mature technology, small electric vehicles, especially electric mopeds, almost all use permanent magnet brushless motors. However, since this kind of motor uses rare earth permanent magnet excitation, the magnetic flux of the motor is almost non-adjustable, and the constant power adjustable speed ratio is low. For actual use and the range of working conditions, more power reserves are required, which is very uneconomical. [0003] In order to improve the performance of electric vehicles, a variety of mechanical variable speed motors have been developed in the industry, as well as two-speed motors or three-speed motors with variable windings. Ho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K7/10
Inventor 杨荷
Owner 杨荷
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