Magnetization state selection and weak magnetic control coordinated control method of stator permanent-magnet memory motor

A magnetization state, memory motor technology, applied in the field of electrical transmission, can solve the problem of sacrificing the torque output capacity of the motor

Active Publication Date: 2017-10-13
SOUTHEAST UNIV
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This method broadens the speed regulation range of the motor to a ...

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  • Magnetization state selection and weak magnetic control coordinated control method of stator permanent-magnet memory motor
  • Magnetization state selection and weak magnetic control coordinated control method of stator permanent-magnet memory motor
  • Magnetization state selection and weak magnetic control coordinated control method of stator permanent-magnet memory motor

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Embodiment Construction

[0047] The technical solution of the present invention will be further introduced below in combination with specific implementation methods and accompanying drawings.

[0048] This specific embodiment discloses a method for coordinated control of magnetization state selection and field-weakening control of a stator permanent magnet memory motor, such as figure 1 shown, including the following steps:

[0049] S1: According to the magnetization state of the permanent magnet, choose ψ pm (i f1 )……ψ pm (i f(k-1) ), ψ pm (i fk ) a total of k permanent magnet flux linkages, and ψ pm (i f(j-1) )>ψ pm (i fj ), 2≤j≤k, and according to the DC bus voltage U dc , rated phase current I n , Quadrature axis inductance L at the jth magnetization state q (j) and permanent magnet flux linkage ψ pm (i f(j) ) to calculate the rotational speed ω e(j) , while using the permanent magnet flux linkage ψ when the permanent magnet is in the saturation magnetization state pm (i f1 ) and ...

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Abstract

The invention discloses a magnetization state selection and weak magnetic control coordinated control method of a stator permanent-magnet memory motor. The constant-power working range of the stator permanent-magnet memory motor is expanded by combining a weak magnetic control method under different permanent magnetization states. According to the method, different current allocation strategies are employed at different rotational speed zones, and the control performance of the motor is optimized; compared with a segmented permanent-magnetic flux control method, the method has the advantage that the torque output capability of the motor at the different rotational speed zones is improved; and meanwhile, under the constant load torque, the efficiency of the stator permanent-magnet memory motor at different rotational speed zones is improved by the method.

Description

technical field [0001] The invention relates to the technical field of electric transmission, in particular to a method for synergistic control of magnetization state selection and field weakening control of a stator permanent magnet memory motor. Background technique [0002] In 2001, German Ostovic first proposed the concept of memory motor. The memory motor uses AlNiCo permanent magnets with low coercive force and high remanence as the excitation source, and directly changes the magnetization state of AlNiCo by applying a magnetic modulation pulse, thereby realizing the adjustment of the magnetic flux density of the air gap magnetic field of the motor. Therefore, the memory motor is considered as a flux controllable permanent magnet synchronous motor with wide application prospects. However, this rotor permanent magnet memory motor has the disadvantages of difficulty in magnetic adjustment, difficult heat dissipation and easy demagnetization of alnico. [0003] In order...

Claims

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Application Information

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IPC IPC(8): H02P21/28H02P21/13H02P27/08
CPCH02P21/0003H02P21/0089H02P21/13H02P21/28H02P27/08H02P2205/01H02P2205/07
Inventor 林明耀杨公德张贝贝
Owner SOUTHEAST UNIV
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