A segmental control method for permanent magnet flux linkage of stator permanent magnet memory motor
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A technology of memory motor and segmental control, which is applied in the field of electric transmission and can solve the problems of low precision of permanent magnet flux linkage and inability to realize optimal control of permanent magnet flux linkage.
Active Publication Date: 2019-05-28
SOUTHEAST UNIV
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The former is greatly affected by the motor parameters, and the calculated permanent magnet flux linkage accuracy is low
The latter can only obtain the maximum and minimum values of permanent magnet flux linkage in a small range of permanent magnet flux linkage, so the optimal control of permanent magnet flux linkage cannot be realized in the full speed range
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[0049] The technical solution of the present invention will be further introduced below in combination with specific implementation methods and accompanying drawings.
[0050] This specific embodiment discloses a segmental control method for permanent magnet flux linkage of a stator permanent magnet memory motor, such as figure 1 shown, including the following steps:
[0051] S1: According to the magnetization state of the permanent magnet, choose ψ pm (i f0 ), ψ pm (i f1 )……ψ pm (i f(k-1) ), ψ pm (i fk ) a total of k+1 permanent magnet flux linkages, and ψ pm (i f(j-1) )>ψ pm (i fj ), 1≤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 fj ) to calculate the rotational speed ω ej , and then the permanent magnet flux linkage ψ pm (i f0 ), ψ pm (i f1 )……ψ pm (i f(k-1) ), ψ pm (i fk ) and the corresponding speed ω e0 , ω e1...
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Abstract
The invention discloses a segmented control method of permanent magnetic linkages of a stator permanent magnetic type memory motor. The method comprises following steps of S1, according to magnetization states of a permanent magnet, selecting k+1 permanent magnetic linkages including phipm (if0), phipm (if1), ..., phipm (if(k-1)), and phipm (ifk), wherein the phipm (if(k-1)) is larger than the phipm (ifj), and 1<=j<=k, calculating rotation speed omegaej according to direct current bus voltage Udc, the rated phase current In, and the quadrature axis inductance Lq(j) and the permanent magnetic linkage phipm (ifj) of the jth kind of magnetization state, and storing the permanent magnetic linkages of phipm (if0), phipm (if1) ..., phipm (if(k-1)), and phipm (ifk) and corresponding rotation speeds of omegae0, omegae1, ..., omegae(k-1), and omegaek into a speed-permanent magnetic linkage table, wherein the if is the magnetic field adjusting pulse; and S2, when the given rotation speed shown in the description meets the condition shown in the description, judging a magnetic field adjusting process of the permanent magnet by comparing the permanent magnetic linkage phipmo(if) and the permanent magnetic linkage phipm(ifj) corresponding to the rotation speed omegaej observed by the permanent magnetic linkage observer. According to the invention, speed adjusting range of the motor is enlarged, and effects on permanent magnetic linkage calculation accuracy imposed by motor parameters are reduced.
Description
technical field [0001] The invention relates to the technical field of electric transmission, in particular to a segmental control method for permanent magnet flux linkage of a stator permanent magnet memory motor. Background technique [0002] The rotor permanent magnet memory motor adopts the armature winding for magnetic adjustment and drive control, which saves space and materials. However, the problem of non-decoupling of drive and magnetic modulation control increases the difficulty of vector control. At the same time, the dynamic changes of the AlNiCo permanent magnet and the position of the armature winding may affect the magnetic adjustment effect of the permanent magnet. In order to overcome the shortcomings of the rotor permanent magnet memory motor, researchers at home and abroad have proposed a stator permanent magnet memory motor topology. The motor has two sets of windings for magnetic modulation and armature, which can be used for magnetic modulation and dr...
Claims
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