A Simplified Algorithm Observation Method for Rotor Position Angle of Five-Phase Permanent Magnet Synchronous Motor
A permanent magnet synchronous motor and rotor position angle technology, applied in electronic commutator, motor control, AC motor control, etc., can solve the problems of low observer gain, high signal processing requirements, and affecting system operation stability, etc., to achieve Simplify the extraction and processing algorithm, increase the gain of the observation channel, and facilitate the effect of smooth operation
Active Publication Date: 2022-03-11
FUZHOU UNIV
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Problems solved by technology
The former can only be applied to the medium and high-speed operating areas of the motor; while the latter effectively solves the observation of the rotor position angle in the low-speed operating area of the rotor, but at present, high-frequency signals are injected into the fundamental wave plane, which has the following defects: (1) The high-frequency signal in the wave plane brings large torque fluctuations, which affects the stability of the system operation; (2) The fundamental wave plane injection method requires more sampling channels and more signal extraction links, and the algorithm is complicated; (3 ) In the fundamental wave plane injection method, the frequency of the harmonic signal in the error function is low, and the gain of the observer is low, resulting in high requirements for signal processing
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[0043] The technical solution of the present invention will be specifically described below in conjunction with the accompanying drawings.
[0044] The invention proposes a five-phase permanent magnet synchronous motor rotor position angle observation method with simplified algorithm for the five-phase permanent magnet synchronous motor drive system. The third harmonic plane is used to inject the high-frequency voltage signal of the amplitude pulse vibration; the center point of the balanced resistance network connected in parallel to the end of the 5-phase winding and the center point of the motor winding are used to extract the high-frequency carrier zero-sequence voltage; the band-pass filter is used , 3 times high-frequency sinusoidal signal of appropriate form, low-pass filter, PI regulator and integrator to demodulate the high-frequency carrier zero-sequence voltage, and finally obtain the observed value of the rotor position angle. The purpose has three aspects: one is ...
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The invention relates to a method for observing the rotor position angle of a five-phase permanent magnet synchronous motor with simplified algorithm. The third harmonic plane is used to inject the high-frequency voltage signal of the amplitude pulse vibration; the center point of the balanced resistance network connected in parallel to the end of the 5-phase winding and the center point of the motor winding are used to extract the high-frequency carrier zero-sequence voltage; the band-pass filter is used , 3 times high-frequency sinusoidal signal of appropriate form, low-pass filter, PI regulator and integrator to demodulate the high-frequency carrier zero-sequence voltage, and finally obtain the observed value of the rotor position angle. The invention simplifies the extraction and processing algorithm of the error signal, improves the sensitivity of the observer, and the motor runs more stably.
Description
technical field [0001] The invention relates to a method for observing the rotor position angle of a five-phase permanent magnet synchronous motor with simplified algorithm. Background technique [0002] Multi-phase permanent magnet synchronous motors have the advantages of high efficiency and multi-degree-of-freedom control, and are widely used in rail transportation, military equipment, aerospace and other fields. Among them, five-phase permanent magnet synchronous Fewer features reduce drive system cost. [0003] Similar to the three-phase system, the control of the instantaneous torque and magnetic field of the five-phase permanent magnet synchronous motor directly determines the dynamic and steady-state performance of the drive system formed by it. During the control process, the accurate acquisition of the rotor position angle of the motor is the key. Rotor position angle physical sensors, such as rotary encoders, resolvers, etc., can be used to measure the rotor pos...
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IPC IPC(8): H02P6/18H02P27/08
CPCH02P6/183H02P27/08H02P2203/11
Inventor 周扬忠吴京周杨公德
Owner FUZHOU UNIV