基于反推控制的永磁同步电机稳定性单矢量控制策略

doi:10.19595/j.cnki.1000-6753.tces.230802

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Abstract

Aiming at the problem that the traditional single-vector control of permanent magnet synchronous motor needs to traverse all basic vectors and ignores the control stability, a stable single-vector control strategy of permanent magnet synchronous motor is proposed based on backstepping control. Firstly, on the basis of establishing the mathematical model of permanent magnet synchronous motor under the dq0 coordinate system, the conventional backstepping controller is derived. Secondly, the expression of the switch vector under the dq0 coordinate system is obtained by mathematical derivation, and it is proved that for the six sectors, there must be a basic voltage vector in each control cycle to keep the control system stable. Then, according to the control voltage obtained by the conventional backstepping controller, the sector where the optimal voltage vector is located is determined, the selection method of the optimal basic voltage vector is proposed, that is, the derivatives corresponding to the Lyapunov function in the three basic voltage vectors in the sectors are compared in pairs, the basic voltage vector corresponding to the minimum value of the derivative of the Lyapunov function is selected as the optimal basic voltage vector, and the basic voltage vector derivative difference strategy table of the six sectors is given, and then the switching state can be determined according to the selected optimal control vector. Finally, by comparing the error of traditional backstepping control, the control performance of different basic voltage vectors, including the optimal basic voltage vector, is comparatively analyzed.
In order to verify the effectiveness of the stable single-vector control strategy proposed in this paper, the simulation verification is carried out firstly, and the results show that compared with the traditional model predictive current control, the longer the simulation time is set, the more obvious the advantages of the control strategy in this paper in computing power consumption. When driving constant torque or variable torque load, the control strategy in this paper can effectively track the reference speed, and compared with the traditional model predicted current control, the control strategy in this paper has stronger stability and smaller output fluctuations. The simulation results also show that if the optimal voltage vector is not used, but a voltage vector is arbitrarily selected for switching control, the speed and current errors will become larger and the control effect will be significantly worse, which further proves the effectiveness of the control strategy in this paper. In addition, when the motor resistance and inductance parameters deviate from the rated value, the control strategy in this paper can maintain a small speed tracking error, indicating that the control strategy in this paper has good robustness.
In order to further verify the superiority of the algorithm in this paper, an experimental platform for permanent magnet synchronous motor to drive spiral spring load is constructed, and the experimental results show that when driving variable torque and variable inertia spiral spring load, the proposed control strategy can still effectively track the reference speed, and compared with the traditional model predictive current control, it has stronger stability and smaller output fluctuations.

Key words： PMSM backstepping control single-vector control basic voltage vector power distribution

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	Yu-Yang
	Zhang-Qianhui
	Yu-Zongzhe
	Mi-Zengqiang

Cite this article:

Yu-Yang,Zhang-Qianhui,Yu-Zongzhe等. Stable Single Vector Control Strategy of Permanent Magnet Synchronous Motor Based on Backstepping Control[J]. Transactions of China Electrotechnical Society, 0, (): 239635-239635.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.230802 OR https://dgjsxb.ces-transaction.com/EN/Y0/V/I/239635

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