A permanent magnet synchronous motor control system and its predictive control method

A permanent magnet synchronous motor and control system technology, applied in the control system, vector control system, motor generator control, etc., can solve problems such as large deviation of motor parameters, poor dynamic and steady-state performance of the system, and unmodeled disturbances , to achieve the effects of reducing prediction error and prediction delay, improving dynamic and steady-state performance, and strong parameter robustness

CN111293940BActive Publication Date: 2021-10-08TIANJIN POLYTECHNIC UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2021-10-08

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Abstract

The invention discloses a permanent magnet synchronous motor control system, comprising a space vector pulse width modulator, a three-phase bridge inverter module, a permanent magnet synchronous motor and a signal acquisition module for collecting feedback signals, characterized in that the signal acquisition The module collects the motor rotor angular velocity, rotor position angle, three-phase current at the motor input side, the DC bus voltage of the inverter module, and the duty cycle of the output of the space vector pulse width modulator; the control system also includes a function for predicting the space vector pulse width modulation The composite multi-level regulation module of the output duty ratio of the converter; the composite multi-level regulation module includes a prediction module, a prediction compensation module, a prediction correction module, and a first-level regulation module, a second-level regulation module, and a third-level regulation module connected in sequence. The invention also discloses a predictive control method of the permanent magnet synchronous motor. The invention improves the dynamic and steady state performance of the system at high speed and low control frequency, and at the same time has strong parameter robustness, and the steady state has no static difference and oscillation.
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Description

technical field

[0001] The invention relates to the field of permanent magnet synchronous motor control, in particular to a permanent magnet synchronous motor control system and a predictive control method thereof. Background technique

[0002] At present, Model Predictive Control (MPC) is widely used in industrial process control (such as chemical and petroleum industries) due to its advantages of realizing nonlinear system control, considering complex constraints and simple design. In the permanent magnet synchronous motor drive system, the algorithm uses the precise mathematical model of the motor to predict the state solution under the action of different control variables, and selects the optimal control variable that should act in the next control cycle, so as to realize the current energy of the motor. Accurately follow the command current value. Model predictive control can make the motor current obtain good dynamic and steady-state response, but there are certain p...

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Embodiment Construction

[0044] In order to further understand the invention content, characteristics and effects of the present invention, the following embodiments are enumerated hereby, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0045] See Figure 1 to Figure 2 , a permanent magnet synchronous motor control system, the control system includes a space vector pulse width modulator, a three-phase bridge inverter module, a permanent magnet synchronous motor and a signal acquisition module for collecting feedback signals, the signal acquisition module collects Motor rotor angular velocity, rotor position angle, three-phase current at the input side of the motor, DC bus voltage of the inverter module, and duty cycle of the output of the space vector pulse width modulator; the control system also includes: used to sample the motor rotor angular velocity, The first transformation module that transforms the sampled value of the rotor position angle and the samp...