Permanent magnet motor capable of automatically adjusting magnetism

A technology of permanent magnet motor and magnetic adjustment, applied in the direction of synchronous machine parts, etc., can solve the problems of controller heating increase, total current increase, motor heating, etc., and achieve the effect of reducing motor current, reducing capacity, and reducing heat generation

Inactive Publication Date: 2011-06-29
刘行
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this technology also has certain defects, that is, the current is larger when using field-weakening control than when not using field-weakening control, because when using field-weakening control, in addition to th

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  • Permanent magnet motor capable of automatically adjusting magnetism
  • Permanent magnet motor capable of automatically adjusting magnetism
  • Permanent magnet motor capable of automatically adjusting magnetism

Examples

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Embodiment Construction

[0029] Through the description of the following examples, it will help to understand the technical essence and technical effects of the present invention, but the present invention cannot be limited by the examples.

[0030] Figure 1 to Figure 5 It is an embodiment of the permanent magnet motor in the technical solution, see figure 1 and figure 2 , the permanent magnet pole 1 is attached to the magnetically conductive pole shoe 2, and is separated from the rotor core 3 by a small gap, the pole shoe 2 is fixed on the non-magnetically conductive bracket 6 by screws or rivets, and there are 6 sets of brackets On the rotating shaft 5 and can be axially offset relative to the rotor core 3, since the permanent magnet pole 1, the pole shoe 2 and the bracket 6 are fixed together, they can slide axially as a whole. See image 3 Four identical springs 9 are used between the bracket 6 and the rotor core 3, and the springs 9 apply a pulling force to the bracket 6 pointing to the roto...

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PUM

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Abstract

Once a permanent magnet motor at present is manufactured, an electromagnetic structure of the permanent magnet motor is fixed and is not changed in operation, so when the motor is overloaded, the current is high, the cost of a controller is increased, the voltage is on the high side at a high speed, and the speed regulation range is influenced. The invention provides a speed regulation permanent magnet motor capable of automatically adjusting the magnetic flux of a stator winding of a linkage motor. The speed regulation permanent magnet motor is characterized by comprising a magnetism adjusting mechanism integrated in the motor, wherein the magnetism adjusting mechanism can change the magnetic flux of the stator winding of the linkage motor according to changes of the rotating speed of the motor, adjust torque coefficients and back electromotive force coefficients of the motor, reduce the current of the motor at a low speed, and reduce the cost of a motor controller; besides, the magnetism adjusting mechanism can reduce the motor voltage when the motor during high-speed operation, reduce weak magnetic current or leave out weak magnet control, and expand the speed regulation range of the motor.

Description

technical field [0001] The invention relates to a permanent magnet motor, in particular to a speed-regulating permanent magnet motor capable of automatically adjusting the magnitude of the permanent magnet flux in a main magnetic circuit. Background technique [0002] The variable speed permanent magnet motor controlled by the frequency converter is widely used in servo, elevator, wind power, new energy vehicle, industrial drive and other fields. [0003] At present, once the permanent magnet motor is manufactured, its electromagnetic structure is fixed and will not change during operation. However, this single electromagnetic structure often has the defect of large current in the acceleration section of the motor in the speed regulation occasion, because the motor needs to To achieve acceleration, the acceleration torque is often much larger than the rated torque, so the motor current during acceleration is often much larger than the rated current, so the current that the m...

Claims

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Application Information

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IPC IPC(8): H02K21/02
Inventor 刘行
Owner 刘行
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