Wide governing, double salient pole, mixed excitation brushless dynamo and weak magnet control method thereof

A hybrid excitation, brushless motor technology, applied in electrical components, electromechanical devices, magnetic circuit static parts, etc., can solve the problems of little practical value, influence of motor efficiency, complicated manufacturing and installation, etc., and achieve wide and constant power adjustment. The effect of speed range, motor efficiency improvement, and strong field weakening ability

Inactive Publication Date: 2005-03-30
SOUTHEAST UNIV
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Problems solved by technology

[0004] The first two solutions are both mechanical, requiring special tools and difficult to operate
In the first solution, it is also necessary to ensure that the permanent magnet can slide freely in the iron core, which not only increases the additional air gap, but also makes the manufacture and installation more complicated. The disadvantages of the first two solutions are obvious and have little practical value
Scheme 3 is simple in structure, easy to control, and has certain practicability. However, in the p

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  • Wide governing, double salient pole, mixed excitation brushless dynamo and weak magnet control method thereof
  • Wide governing, double salient pole, mixed excitation brushless dynamo and weak magnet control method thereof
  • Wide governing, double salient pole, mixed excitation brushless dynamo and weak magnet control method thereof

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[0018] The invention is based on a high-performance double salient permanent magnet motor, adopts a hybrid excitation method that combines permanent magnet excitation and electric excitation to perform stepless field weakening control of the motor, and uses a smaller electric excitation to increase the adjustment of the motor. Speed ​​range to further broaden the scope of application of doubly salient permanent magnet motors.

[0019] Place a special winding (DC excitation winding) on ​​the stator of the doubly salient motor at a position perpendicular to the axis of the magnetic field generated by the permanent magnets of the stator. When the excitation winding is supplied with a direct current, the direction of the magnetic field generated by the direct current is opposite to that of the permanent magnet When the time, the field weakening control of the double salient permanent magnet motor can be realized. A magnetic bridge is specially set between the permanent magnet of the m...

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Abstract

The motor includes following structure: DC exciting coil are setup between armature windings on stator; corresponding permanent magnet is setup at outboard of the DC exciting coil; there is bridge of guiding magnetism between DC exciting coil and the permanent magnet; direction of magnetic field is along circumferencial direction in motor. Method of mixed excitation of combining permanent magnetism excitation with electricity excitation is adopted in weak magnetism control method for controlling excitation of motor. The method increases regulating range by using smaller electricity excitation, suitable to application needed of changing speed in large range.

Description

technical field [0001] The invention relates to a double-salient pole permanent magnet brushless motor suitable for electric vehicles and other application occasions requiring large-scale variable-speed operation, and belongs to the technical field of double-salient pole brushless motor manufacturing. technical background [0002] In the early 1990s, American motor expert T.A. Lipo and others aimed at the shortcomings of switched reluctance motors, and installed modern high-performance permanent magnets on the stator or rotor of switched reluctance motors to form a new type of motor—double salient permanent magnets. motor. The existing research results show that the doubly salient motor has the advantages of high power density, simple structure, good fault tolerance and flexible control. However, due to the inherent characteristics of permanent magnet materials, the excitation of doubly salient permanent magnet motors cannot be adjusted, and its ap...

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Application Information

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IPC IPC(8): H02K1/17H02K3/28H02K23/04
Inventor 程明朱孝勇
Owner SOUTHEAST UNIV
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