Integrated self-adaptive flux shunt speed multiplying method of permanent magnet brushless motor

A permanent magnet brushless, self-adaptive technology, applied in the direction of speed/torque control of a single motor, can solve the problem of poor effect and achieve the effect of speed increase

Inactive Publication Date: 2012-04-25
杨荷
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology is currently a hot spot, and it is mostly used for permanent magnet brushless synchronous motors

Method used

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  • Integrated self-adaptive flux shunt speed multiplying method of permanent magnet brushless motor
  • Integrated self-adaptive flux shunt speed multiplying method of permanent magnet brushless motor
  • Integrated self-adaptive flux shunt speed multiplying method of permanent magnet brushless motor

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Embodiment Construction

[0025] The present invention will be further explained in conjunction with the accompanying drawings. The manufacturing technology of this device is very clear to those in the field.

[0026] See figure 1 , In the figure a-b-c is the characteristic curve of permanent magnet motor, a-b-d-e is the ideal vehicle dynamic characteristic curve, the front section a-b is the equal torque section, and the b-d-e section is the equal power section, which is a hyperbola P=Tm×ω. The product of the coordinates of each point on the curve is the power P=Tm×ω, which is equal to the area on the lower left. As can be seen in the figure, the speed range of the permanent magnet motor is very narrow, and the speed regulation ratio ω 2 / ω 1 Lower than the reference speed ω 1 Not much higher, and the power drops sharply as the speed increases. The ideal characteristic is that the speed regulation ratio is the base speed ω 1 2 times or more. Figure ω 2 It is the highest speed at a constant speed corresp...

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Abstract

The invention relates to a permanent magnet brushless motor, in particular to an integrated self-adaptive flux shunt speed multiplying method of a permanent magnet brushless speed-regulation motor, which is characterized in that a stator axially moves relative to a rotor so as to regulate the main flux of an air gap, and the process is automatically carried out by means of a centrifugal mechanismwith specific functional relation, and the structure is integrated. The permanent magnet brushless motor is driven to rotate by a controller; a rotating-speed induction magnetism-regulating mechanismcomprises a centrifugal mechanism and a flux shunt; the centrifugal mechanism generates the centrifugal force F omega=rmomega2, which is transferred to the Z direction and turned to Fz; the Fz leads the permanent magnet rotor to move axially, and the rotor and the stator are gradually staggered at a certain position delta z, so that a magnetic circuit is changed, one part of the flux phi d is shunted by the flux shunt, and the flux phi m passing through a winding is reduced; as a result, the output torque T of the motor is reduced at the same time as the rotating speed omega is increased, andthe power (P=T*omega) is remained unchanged, so as to realize the characteristic of speed regulation of the permanent magnet motor at constant power.

Description

Technical field [0001] The invention relates to a permanent magnet brushless motor, in particular to an integrated self-adaptive magnetic flux shunting speed expansion method of a permanent magnet brushless motor. Background technique [0002] Among the existing technologies and products, the motors used for electric vehicles mainly include induction motors (IM), permanent magnet brushless motors (PM) and switched reluctance motors (SRM), as opposed to induction motors and switched reluctance motors. Among them, the permanent magnet motor has a compact structure, small size, high power, high efficiency, and mature technology. Therefore, almost all existing electric bicycles and light electric motorcycles use permanent magnet brushless motors. [0003] However, due to the use of permanent magnets for excitation, it is difficult to adjust the magnetic flux of the motor. Therefore, the full power speed regulation range is narrow, and more power reserves are required for the actual ope...

Claims

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Application Information

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IPC IPC(8): H02P6/08
Inventor 杨荷
Owner 杨荷
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