Flux-weakening method of doubly salient motor and wide speed governing doubly salient hybrid excitation motor
A double salient motor, double salient technology, which is applied to motors, synchronous motors with rotating armatures and stationary magnets, electric vehicles, etc. The effect of constant power speed range, high power density and strong magnetic weakening ability
Inactive Publication Date: 2014-09-24
JINAN JIMEILE POWER SUPPLY TECH
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Problems solved by technology
However, due to the inherent characteristics of permanent magnet materials, the excitation of doubly salient permanent magnet motors cannot be adjusted, and its application in occasions such as electric vehicles that require wide speed regulation is limited. Therefore, constant power field weakening control is a doubly salient permanent magnet motor One of the application difficulties
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[0014] With reference to accompanying drawing, the present invention is further described; Realize the field weakening method of doubly salient pole motor is: adopt the method for the hybrid excitation that permanent magnet excitation and electric excitation combine to carry out stepless Field weakening control, using smaller electric excitation to expand the speed range of the motor. The specific method is to place a DC excitation winding on the stator excitation teeth of the double salient pole permanent magnet motor with split rotor flux switching. The direction of the magnetic field generated by the input of DC current is opposite to the direction of the permanent magnet magnetic field to realize the field-weakening control of the double-salient pole permanent magnet motor with split rotor flux switching; magnetic bridges are also set on both sides of the permanent magnet of the motor to provide direct current The field flux provides a path. one according to the above Th...
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The invention relates to a flux-weakening method of a doubly salient motor and a wide speed governing doubly salient hybrid excitation motor. The flux-weakening method and the motor are characterized in that a hybrid excitation method which combines permanent magnet excitation and electric excitation is used to carry out stepless flux-weakening control on a segmented-rotor flux switching doubly salient permanent magnet motor; and small electric excitation is used to expand the speed governing range of the motor. The specific method comprises the steps that a direct current excitation winding is placed on a stator excitation tooth of the segmented-rotor flux switching doubly salient permanent magnet motor; the direction of the magnetic field produced by providing direct current for the excitation winding is opposite to the direction of the magnetic field of a permanent magnet, thus flux-weakening control is carried out on the segmented-rotor flux switching doubly salient permanent magnet motor; and magnetic bridges are arranged on both sides of the permanent magnet of the motor, thus a pathway is provided for direct current excitation flux. The flux-weakening method and the motor, which are provided by the invention, are suitable for frequent starting, acceleration, high-speed operation, speed reducing, parking and other applications of electric cars and the like.
Description
technical field [0001] The invention belongs to the technical field of doubly salient pole motor manufacturing; in particular, a field weakening method and a wide speed-regulating doubly salient pole hybrid excitation method suitable for split rotor flux switching doubly salient pole motors that require wide-range variable speed operation such as electric vehicles motor. Background technique [0002] Adding high-performance permanent magnets to the stator or rotor of the switched reluctance motor forms a new type of motor, the doubly salient pole permanent magnet motor. 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 application in occasions such as electric vehicles that require wide speed regulation is limited. Therefore, constant powe...
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IPC IPC(8): H02K21/30H02K1/17
CPCY02T10/64
Inventor 刘海鹏张文昌张军刚谈学超王胜平于功山王怀杰
Owner JINAN JIMEILE POWER SUPPLY TECH