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Permanent magnet flux-switching generator voltage control method by space vector modulation

A permanent magnet switch and generator technology, applied in the direction of motor generator control, control generator, vector control system, etc., can solve the problem that the steady-state control performance is not as good as vector control, flux linkage amplitude, torque pulsation, stator current High harmonic content and other problems, achieve good dynamic performance, reduce stator current harmonics and voltage ripple, and reduce torque ripple

Inactive Publication Date: 2009-12-09
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

The disadvantages of direct torque control are as follows: the hysteresis link control is adopted for the stator flux linkage and electromagnetic torque, the flux linkage amplitude and torque have pulsation, the voltage ripple is large, and the stator current harmonic content is relatively high. State control performance is not as good as vector control

Method used

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  • Permanent magnet flux-switching generator voltage control method by space vector modulation
  • Permanent magnet flux-switching generator voltage control method by space vector modulation
  • Permanent magnet flux-switching generator voltage control method by space vector modulation

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Embodiment Construction

[0022] Such as figure 1 As shown, a space vector control voltage regulation strategy of permanent magnet switch flux linkage generator is characterized in that the position sensor is used to detect the no-load permanent magnet flux linkage vector angle θ of the permanent magnet switch flux linkage generator, and the given Permanent magnet switch flux linkage generator voltage U dc * and actual voltage U dc The difference in turn passes through the PI link and the limiting link to obtain the instantaneous torque given value T of the permanent magnet switch flux linkage generator * ;The given permanent magnet switch flux linkage generator stator flux amplitude ψ * And permanent magnet switch flux generator instantaneous torque given value T * , The no-load permanent magnet flux linkage vector angle θ of the permanent magnet switch flux linkage generator passes through the target stator flux linkage vector link to obtain the target stator flux linkage vector of the permanent ...

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Abstract

The invention discloses a permanent magnet flux-switching generator voltage control method by space vector modulation, belonging to stator permanent magnet type generator control method. The voltage regulation method of the invention defines output of a voltage PI loop as given electromagnetic torque, under the condition that the stator flux amplitude of the permanent magnet flux-switching generator is constant, a blended space vector is selected to regulate the included angle of a stator flux vector and a non-load permanent magnet flux vector, so as to realize fast and accurate control on electromagnetic torque and voltage. The invention has no current loop or coordinate transformation link, is simple in realization only by identifying stator flux, and has strong parameter roughness, small current harmonics, small torque pulsation, small voltage ripple, fast dynamic response and favourable voltage control performance.

Description

technical field [0001] The invention relates to a method for controlling the voltage of a permanent magnet switch flux-linkage generator with space vector modulation, and belongs to the field of permanent magnet switch flux-linkage generator control. Background technique [0002] At present, the commonly used control strategies for permanent magnet switch flux generators are vector control strategy and direct torque control strategy. Vector control theoretically solves the problem of high-performance control of AC motor torque, and is soon transplanted to synchronous motors. The basic idea of ​​vector control is derived from the rigorous simulation of DC motors. The DC motor itself has good decoupling, and it can control the motor torque by controlling its armature current and excitation current respectively. The vector control divides the stator current into the excitation component and the torque component through the field orientation of the motor, and controls them sep...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P9/00H02P6/16H02P21/12
Inventor 王宇邓智泉王晓琳
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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