Permanent magnet synchronous motor model-free prediction control method based on extended state observer

A permanent magnet synchronous motor, expansion state technology, applied in motor generator control, electronic commutation motor control, control system and other directions, can solve the problems of poor system control performance, motor noise, current static difference, etc., to achieve good dynamic Performance and steady state performance, good control effects, effects of addressing hardware platform limitations

Inactive Publication Date: 2020-03-24
NORTH CHINA UNIVERSITY OF TECHNOLOGY
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  • Application Information

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Problems solved by technology

[0005] The invention aims to solve the problems of motor noise, steady-state torque, large current ripple, current static difference, and poor system control performance when the motor parameters are inaccurate in the traditional model predictive control scheme

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  • Permanent magnet synchronous motor model-free prediction control method based on extended state observer
  • Permanent magnet synchronous motor model-free prediction control method based on extended state observer
  • Permanent magnet synchronous motor model-free prediction control method based on extended state observer

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Embodiment Construction

[0023] The following examples can enable those skilled in the art to understand the present invention more fully, but do not limit the present invention in any way.

[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings, wherein the d-axis current command generation method in step 2 is as follows: As an example, but only for explaining the present invention, not for limiting the scope of the present invention:

[0025] figure 1 It is a hardware circuit structure diagram of the present invention, including a three-phase voltage source, a three-phase diode rectifier bridge, a DC side capacitor, a permanent magnet motor, a voltage and current sampling circuit, a DSP (Digital Signal Processing, digital signal processing) controller and a drive circuit. The voltage and current sa...

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Abstract

The invention relates to a permanent magnet synchronous motor model-free prediction control method based on an extended state observer, and the method comprises the steps: A, estimating unknown and disturbance parts of a system through employing a linear extended state observer, and not relating to motor parameters; and B, enabling the motor reference current vector and the feedback current vectorto pass through a permanent magnet synchronous motor model-free controller based on an extended state observer, obtaining a reference voltage vector by using a complex vector current regulator, and obtaining six paths of switching signals of an inverter after PWM modulation, thereby realizing control of the motor. According to the invention, the problems of large motor noise, steady-state torque,large current ripple, static current difference and poor system control performance in a traditional model prediction control scheme when motor parameters are inaccurate are solved.

Description

technical field [0001] The invention relates to a model-free predictive control method for a permanent magnet synchronous motor based on an extended state observer. Background technique [0002] Model predictive control (MPC) appeared in the process control of the industrial field in the late 1970s, and was widely used in the process industry such as chemical industry in the early stage. In the 1990s, German scholar Holtz first applied model predictive control to the field of power electronic transmission. In recent years, with the improvement of the performance of digital processors and the reduction of their cost, the large amount of calculation is no longer an obstacle restricting the development of MPC. It is gradually become a research hotspot. At present, MPC has become an important branch of control methods in the field of power electronic transmission. [0003] However, MPC relies on plant mathematical models and parameter accuracy. In practical applications, cha...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00H02P21/13
CPCH02P21/0003H02P21/13
Inventor 张永昌姜皓黄兰兰
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY
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