Permanent magnet flux-switching generator voltage control method by space vector modulation
A space vector modulation, generator voltage technology, applied in 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 ripple, stator The problem of high current harmonic content can achieve good dynamic performance, reduce stator current harmonics and voltage ripple, and reduce torque ripple.
Inactive Publication Date: 2011-05-18
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
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[0023] like figure 1 As shown, a space vector control voltage regulation strategy of the permanent magnet switching flux linkage generator is characterized in that the no-load permanent magnet flux linkage vector angle θ of the permanent magnet switching flux linkage generator is obtained by detecting the position sensor, and the given Permanent magnet switching flux linkage generator voltage U dc * with the actual voltage U dc The difference passes through the PI link and the limit link in turn to obtain the instantaneous torque given value T of the permanent magnet switching flux linkage generator. * ;The given permanent magnet switching flux linkage generator stator flux linkage amplitude ψ * and the instantaneous torque given value T of the permanent magnet switching flux linkage generator * , The no-load permanent magnet flux linkage vector angle θ of the permanent magnet switching flux linkage generator passes through the target stator flux linkage vector link to obt...
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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 voltage control method of a permanent magnet switching flux linkage generator with space vector modulation, and belongs to the field of permanent magnet switching flux linkage generator control. Background technique [0002] At present, the commonly used control strategies of PMSM 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 stems 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 orientation of the motor magnetic field, and controls them respectively, so as to obtain a good deco...
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IPC IPC(8): H02P21/00H02P6/16H02P9/00H02P21/12
Inventor 王宇邓智泉王晓琳
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS