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A Dynamic Finite State Set Model Predictive Torque Control Method for Permanent Magnet Synchronous Motor

A permanent magnet synchronous motor, finite state set technology, applied in torque ripple control, motor generator control, electronic commutation motor control, etc. The problem of increasing frequency and computing burden can achieve the effect of improving performance, reducing system computing burden, and reducing computing workload.

Inactive Publication Date: 2021-07-02
CHANGAN UNIV
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  • Application Information

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Problems solved by technology

[0003] A voltage vector with variable angle and amplitude can be generated through space vector modulation, which optimizes the system's control of torque and flux linkage, but it also brings about an increase in the number of alternative voltage vectors, and increases the system switching frequency and calculation burden. , and simply increasing the number of alternative voltage vectors has limitations in improving performance

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  • A Dynamic Finite State Set Model Predictive Torque Control Method for Permanent Magnet Synchronous Motor
  • A Dynamic Finite State Set Model Predictive Torque Control Method for Permanent Magnet Synchronous Motor
  • A Dynamic Finite State Set Model Predictive Torque Control Method for Permanent Magnet Synchronous Motor

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Embodiment Construction

[0048] The invention provides a dynamic finite state set model prediction torque control method for permanent magnet synchronous motors. According to the law of action of moments, fuzzy control is used to design the set of alternative voltage vectors online according to the state of the system, and the influence of adding zero voltage vectors in the set of alternative voltage vectors on the control effect of the system is analyzed. Comprehensively considering the control requirements of system torque, flux linkage, switching frequency and dynamic performance, the absolute value of flux linkage error is used as the static and dynamic judgment condition of the system, and the set of alternative voltage vectors of the system is dynamically adjusted, which simplifies the set of alternative voltage vectors. The comprehensive performance of the control system is improved, and the torque ripple is reduced.

[0049] The specific steps of a dynamic finite state set model predictive tor...

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Abstract

The invention discloses a dynamic finite state set model prediction torque control method for a permanent magnet synchronous motor. According to the law of action of moments, fuzzy control is used to design the set of alternative voltage vectors online according to the state of the system, and the influence of adding zero voltage vectors in the set of alternative voltage vectors on the control effect of the system is analyzed. Comprehensively considering the control requirements of system torque, flux linkage, switching frequency and dynamic performance, the absolute value of flux linkage error is used as the static and dynamic judgment condition of the system, and the set of alternative voltage vectors of the system is dynamically adjusted, which simplifies the set of alternative voltage vectors. The comprehensive performance of the control system is improved, and the torque ripple is reduced.

Description

technical field [0001] The invention belongs to the technical field of motor control, and in particular relates to a dynamic finite state set model predictive torque control method for a permanent magnet synchronous motor. Background technique [0002] The finite state set model predictive control of the traditional permanent magnet synchronous motor performs model prediction and cost function calculation based on the seven basic voltage vectors that can be generated by the three-phase two-level inverter. Although the control idea of ​​finite state set model predictive control is simple, the seven basic voltage vector angles and amplitudes of the candidate voltage vector set in each control cycle are fixed, and the control effect on motor torque and stator flux linkage is limited, and there are torque ripple and The problem of large flux linkage pulsation. [0003] A voltage vector with variable angle and amplitude can be generated through space vector modulation, which opt...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/20H02P21/28H02P6/10
CPCH02P6/10H02P21/20H02P21/28
Inventor 李耀华秦辉苏锦仕秦玉贵赵承辉周逸凡
Owner CHANGAN UNIV