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A method for restraining the flux-adjusting torque ripple of a memory motor based on current decoupling

A memory motor and torque ripple technology, applied in the direction of torque ripple control, can solve problems such as output torque ripple, and achieve the effects of improving accuracy, reducing magnetic loss, and weakening interference

Inactive Publication Date: 2019-01-04
SOUTHEAST UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the defects of the above-mentioned prior art, the present invention provides a current decoupling-based method for suppressing the torque pulsation of the magnetic modulation of the memory motor, which realizes on-line magnetic modulation, suppresses the transient torque pulsation of the magnetic modulation, and solves the problem of output torque fluctuation under load. The violent fluctuation of moment and other problems

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  • A method for restraining the flux-adjusting torque ripple of a memory motor based on current decoupling
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  • A method for restraining the flux-adjusting torque ripple of a memory motor based on current decoupling

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the examples, but not as a limitation of the present invention.

[0026] Please combine figure 1 As shown, the current decoupling-based method for suppressing the torque ripple of the memory motor magnetization involved in this embodiment includes the following control process:

[0027] Actual motor speed ω m with given speed The signal obtained by the deviation of the proportional-integral regulator is used as the torque given value Divided by the rotor flux linkage ψ r Get the given value of q-axis current d-axis current given value

[0028] Motor d, q axis current actual value i d i q with given value The deviation of the input proportional-integral regulator, according to the motor voltage equation

[0029]

[0030] R S is the stator winding resistance, ω e is the rotor electrical angular velocity, L d and L q are the d and q axis inductances respectively, subtract an ite...

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Abstract

The invention discloses a method for restraining the flux-adjusting torque ripple of a memory motor based on current decoupling, including setting given values of d, q-axis current, Both and d, The deviation from the q-axis current setpoint is input to the PI regulator, the output of the d-axis current PI regulator is subtracted from omega eLqiq to obtain the d-axis voltage given value, To the output of q-axis current PI regulator, [omega]e(Ldid + [psi]r) is added to get the given value of q-axis voltage. D, q-axis voltage is controlled by coordinate transformation and SVPWM modulation to drive the inverter motor. When the rotational speed of the motor is higher than the base speed, the magnetization state of the permanent magnet is adjusted discretely by using the memory magnetization method, and the d-axis current weakening method is used to continuously adjust the magnetization state in each magnetization state, and the q-axis decoupling current is applied at the same time as the d-axis current is applied, so as to keep the torque constant during the magnetization adjustment period and suppress the torque ripple during the magnetization adjustment period.

Description

technical field [0001] The invention relates to a method for suppressing the pulsation of the magnetic modulation torque of a motor, in particular to a method for suppressing the pulsation of the magnetic modulation torque of a memory motor based on current decoupling. Background technique [0002] Variable Flux Memory Machine (Variable Flux Memory Machine, VFMM) is considered as a real adjustable flux permanent magnet motor. This type of motor applies instantaneous charging and demagnetizing current pulses through the armature winding or an additional magnetic coil to change the magnetization state of the low-coercivity permanent magnet material, thereby flexibly adjusting the air gap magnetic field, and has almost no electrical excitation loss. As a new concept of permanent magnet motor, VFMM has broad application prospects in the fields of electric vehicles, wind power generation and household appliances. [0003] The AC magnetic modulation memory motor changes the magne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/10
CPCH02P6/10
Inventor 阳辉李光旭林鹤云吕舒康
Owner SOUTHEAST UNIV
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