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Robust model predictive current control method and device for permanent magnet synchronous motor

A permanent magnet synchronous motor, model prediction technology, applied in motor control, current controller, motor generator control, etc., can solve problems such as parameter mismatch, reduce current error, improve current control effect, and reduce calculation burden Effect

Active Publication Date: 2021-08-13
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0005] The invention provides a robust model predictive current control device and method for a permanent magnet synchronous motor, which solves the problem of parameter mismatch of the permanent magnet synchronous motor's stator resistance, rotor flux linkage, quadrature axis and direct axis inductance

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  • Robust model predictive current control method and device for permanent magnet synchronous motor
  • Robust model predictive current control method and device for permanent magnet synchronous motor
  • Robust model predictive current control method and device for permanent magnet synchronous motor

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Embodiment Construction

[0054] In order to deepen the knowledge and understanding of the present invention, the technical solutions of the present invention will be further introduced below in conjunction with the accompanying drawings and specific embodiments.

[0055] In order to reduce the dependence of the permanent magnet synchronous motor model predictive current control algorithm on the motor parameters, improve the robustness of the model predictive current control, and ensure that the motor always operates in a high-efficiency and stable state, the invention provides a robust permanent magnet synchronous motor The model predicts the current control device. Such as figure 1 As shown, the present invention provides a robust model predictive current control device for a permanent magnet synchronous motor, including a stator current command generation module 1, a signal acquisition module 2, a conversion module 3, a current vector conversion module 4, and a robust model predictive current contro...

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Abstract

The invention discloses a robust model predictive current control method and device of a permanent magnet synchronous motor. According to the device, target stator current d-axis and q-axis current components output by a stator current instruction generation module, rotor electrical angular velocity output by a conversion module and stator current direct-axis and quadrature-axis components under a rotating coordinate system output by a current vector conversion module are calculated, and an optimal voltage vector is obtained; a driving signal required by an inverter power switch device according to the obtained optimal voltage vector is generated; and the driving signal of the inverter power switch device acts on a three-phase inverter module, so that the permanent magnet synchronous motor realizes robust model predictive current control. The device effectively reduces the current error caused by parameter change when the predicted current is calculated by the algorithm, reduces the parameter sensitivity of the control algorithm, improves the current control effect, and is small in calculation burden and convenient to apply.

Description

technical field [0001] The invention belongs to the field of motor control, and in particular relates to a robust model predictive current control device and method for a permanent magnet synchronous motor. Background technique [0002] Permanent magnet synchronous motors have the advantages of high operating efficiency, high power density, and simple control, and are widely used in transmission fields of various voltages and power levels. Since it is not constrained by the modulation strategy of the converter, model predictive current control (Model Predictive Current Control, MPCC) has received extensive attention in the field of motor drives. By predicting the current state in the future, the current response close to the expected current can be obtained, thereby improving the current control performance. [0003] Traditional permanent magnet synchronous motor model predictive current control often needs to calculate the predicted current according to the stator resistan...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/28H02P21/14H02P21/22H02P25/022H02P27/06
CPCH02P6/28H02P21/14H02P21/22H02P25/022H02P27/06H02P2205/01H02P2207/05
Inventor 吴翔吕泽昊李超朱季枫张甲哲张旭谭国俊
Owner CHINA UNIV OF MINING & TECH
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