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Continuous model prediction control method and device for surface-mounted permanent magnet synchronous motor

A permanent magnet synchronous motor, model predictive control technology, applied in the direction of motor control, motor generator control, AC motor control, etc., can solve problems such as external disturbance, permanent magnet synchronous motor parameter mismatch, parameter sensitivity, etc.

Pending Publication Date: 2021-09-07
QUANZHOU INST OF EQUIP MFG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The traditional continuous model predictive control method relies on the system model and is very sensitive to parameters. There are problems such as parameter mismatch and external disturbance during the operation of permanent magnet synchronous motors.

Method used

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  • Continuous model prediction control method and device for surface-mounted permanent magnet synchronous motor
  • Continuous model prediction control method and device for surface-mounted permanent magnet synchronous motor
  • Continuous model prediction control method and device for surface-mounted permanent magnet synchronous motor

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Embodiment 1

[0074] This embodiment provides a continuous model predictive control method for surface-mounted permanent magnet synchronous motors, such as figure 1 shown, including:

[0075] Step 10, discretize the d-q axis mathematical model of the permanent magnet synchronous motor, and obtain the d-q axis model of the incremental permanent magnet synchronous motor through the difference between k beat and k-1 beat, thereby eliminating the influence of the flux linkage parameter, wherein k is greater than the natural number of 1;

[0076] Step 20, constructing a least squares identification strategy, inputting the input and output data of the d-axis and q-axis into the least squares identification strategy in turn to obtain the observed values ​​of the voltage increment coefficient and the current increment coefficient;

[0077] Step 30, feeding the observed values ​​of the voltage increment coefficient and current increment coefficient into the d-q axis model of the incremental permane...

Embodiment 2

[0129] In this embodiment, a continuous model predictive control device for a surface-mounted permanent magnet synchronous motor is provided, such as figure 2 shown, including:

[0130] Incremental model construction module, observation value acquisition module, compensation module, weight function module and convergence module;

[0131] The incremental model building block is used to discretize the d-q axis mathematical model of the permanent magnet synchronous motor, and obtain the d-q axis model of the incremental permanent magnet synchronous motor through the difference between the k beat and the k-1 beat, thereby eliminating the flux linkage parameter Influence, wherein, k is a natural number greater than 1;

[0132] The observed value acquisition module is used to construct a least squares identification strategy, and sequentially input the input and output data of the d axis and the q axis into the least squares identification strategy to obtain the observed values ​​...

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Abstract

The embodiment of the invention discloses a continuous model prediction control method for a surface-mounted permanent magnet synchronous motor. The method comprises the following steps of firstly, eliminating the influence of flux linkage mismatch of the permanent magnet synchronous motor by adopting an incremental model, and reducing the number of model parameters of a d-q axis to two, so that the parameters can be directly solved through an algebraic method in one control period. However, the method is easily interfered by sampling precision and noise, so that a forgetting factor recursive least square method is further introduced in the embodiment to identify the model parameters in real time, and the influence of the model parameter mismatch is compensated. In the design of a continuous model prediction controller, a sliding mode reaching law concept of a weighting function is introduced, and the differential component of the weighting function is gradually converged to 0 by planning a sliding mode reaching function, so that the continuous model prediction controller with better performance is realized. According to the continuous model prediction control method and device of the surface-mounted permanent magnet synchronous motor provided by the invention, the continuous adaptive sliding mode prediction control is realized.

Description

technical field [0001] The invention relates to the technical field of surface-mounted permanent magnet synchronous motors, in particular to a continuous model predictive control method and device for surface-mounted permanent magnet synchronous motors. Background technique [0002] The permanent magnet synchronous motor provides excitation with permanent magnets, which makes the structure of the motor relatively simple, reduces the cost of processing and assembly, and saves the collector ring and brush that are prone to problems, which improves the reliability of the motor operation; and because no excitation is required current, without field losses, increasing the efficiency and power density of the motor. The permanent magnet synchronous motor has the advantages of small size, high power density, large adjustment range, and strong torque output capability, and is widely used in the field of motion control. [0003] The traditional continuous model predictive control met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00H02P25/022
CPCH02P21/0003H02P21/0007H02P25/022H02P2207/055
Inventor 汪凤翔何龙夏安俊李政柯栋梁黄东晓于新红
Owner QUANZHOU INST OF EQUIP MFG
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