D-axis and A-axis current vector composite controller of permanent-magnet synchronous motor
A technology of permanent magnet synchronous motor and compound controller, which is applied in motor control, vector control system, motor generator control, etc., and can solve the high requirements for the accuracy, real-time performance and processing speed of rotor position and current detection and calculation , Control gain affects system stability, affects system control performance and other issues
A technology of permanent magnet synchronous motor and compound controller, which is applied in motor control, vector control system, motor generator control, etc., and can solve the high requirements for the accuracy, real-time performance and processing speed of rotor position and current detection and calculation , Control gain affects system stability, affects system control performance and other issues
CN105680754AActive Publication Date: 2016-06-15TSINGHUA UNIV
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[0022] The present invention will be further described below using the accompanying drawings and embodiments. The accompanying drawings described here are used to provide a further understanding of the present invention, constitute a part of the present application, and do not constitute a limitation to the present invention.
[0023] This embodiment takes a three-phase permanent magnet synchronous motor as an example, including U, V, and W three-phase windings, and the phase difference between any two phases is 120°. The rotary transformer is used as the rotor position sensor, and the angular velocity of the rotor is obtained at the same time. Three-phase stator currents are measured with integrated conductor Hall effect sensors. Speed ​​given signal ω * Timed transmission to the controller by the external digital bus. The controller adopts the TMS320C28x of Texas Instruments (TI) TM A series of digital signal processing chips, which contain a timing interrupt source, and ...
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The invention relates to a D-axis and A-axis current vector composite controller of a permanent-magnet synchronous motor. The D-axis and A-axis current vector composite controller is characterized by comprising a position sensor, a speed measurement feedback link, a counter potential feed-forward compensator, a rotational speed closed-loop controller, an A-axis current composite controller, a D-axis current composite controller and a vector converter. By the D-axis and A-axis current vector composite controller, decoupling composite control is separately carried out on i<d> and i<q> under a dq coordinate, the speed regulation range is wide, phase shift of a phase current closed-loop control structure caused by limited bandwidth of the controller is prevented, and the D-axis and A-axis current vector composite controller has favorable performance in all ranges of speed regulation; through the adoption of a composite controls structure with combination of feed-forward and feedback, the dynamic characteristic is improved, the feedback control gain is reduced, and the gain margin of the system is improved; feed-forward is designed on the basis of the dynamic characteristic of an object, and D-axis and A-axis current vector composite controller is clear in physical concept, simple in structure and stable in working, and is easy to be implemented; and meanwhile, feedback control is introduced, the control precision is improved, and an error caused by model inaccuracy and disturbance is overcome.
Description
technical field [0001] The invention belongs to the technical field of motor control, and relates to a method for compound control of orthogonal axis current vectors of a permanent magnet synchronous motor. This method is suitable for the control of high-precision electric servo system in aerospace, military equipment and industrial production. Background technique [0002] The current vector control method used in the high-precision electromechanical servo system needs to accurately detect the rotor position angle θ and the stator current of each phase in real time, and realize the direct-axis current i by establishing the dq-axis mathematical model of the motor. d and quadrature current i q decoupling control. The commonly used current closed-loop vector control has two basic structures: the current control based on the stator reference frame and the current control based on the rotor reference frame. [0003] Based on the current control structure of the stator referen...
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Patent Timeline
15 Jun 2016
Publication
CN105680754A
- IPC
- H02P21/22; H02P21/18
- CPC
- H02P21/14; H02P2205/01; H02P2205/07; H02P2207/05
- Inventors
- 和阳; 朱纪洪