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Permanent magnet synchronous motor position sensorless control based on non-singular terminal sliding mode

A permanent magnet synchronous motor, non-singular terminal technology, applied in motor generator control, electronic commutation motor control, control system and other directions, can solve the problem of low speed estimation accuracy, improve the rotor position and speed estimation accuracy, simplify The effect of designing, optimizing performance

Active Publication Date: 2019-06-28
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a solution to the problem of low accuracy of rotor position and rotational speed estimation in the absence of position vector control of permanent magnet synchronous motors, and propose a new terminal sliding mode observer based on fast power reaching law

Method used

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  • Permanent magnet synchronous motor position sensorless control based on non-singular terminal sliding mode
  • Permanent magnet synchronous motor position sensorless control based on non-singular terminal sliding mode
  • Permanent magnet synchronous motor position sensorless control based on non-singular terminal sliding mode

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specific Embodiment approach 1

[0026] Specific implementation mode one: refer to figure 1 Specifically illustrate this embodiment, the non-singular terminal sliding mode based permanent magnet synchronous motor position sensorless control method described in this embodiment, the method includes the following steps:

[0027] Step 1. Design an integral nonsingular fast terminal sliding surface.

[0028] Step 2. According to the mathematical model of the surface-mounted permanent magnet synchronous motor in the two-phase stationary coordinate system, the sliding mode observer is designed.

[0029] Step 3. Design the control law of the terminal sliding mode observer in combination with the fast power reaching law.

[0030] Step 4. Perform stability analysis on the designed observer.

[0031] In this embodiment, the application proposes a design method of a new terminal sliding mode observer based on fast power reaching law. By designing a new type of integral non-singular fast terminal sliding mode surface an...

specific Embodiment approach 2

[0032] Specific embodiment 2: This embodiment is to further explain the position sensorless control of permanent magnet synchronous motor based on non-singular terminal sliding mode described in specific embodiment 1. In this embodiment, the integral non-singular The singular fast terminal sliding mode surface is:

[0033]

[0034] In the formula: b, c, r>0; x 1 is the state variable of the system.

specific Embodiment approach 3

[0035] Specific embodiment three: This embodiment is to further illustrate the non-singular terminal sliding mode based permanent magnet synchronous motor position sensorless control described in specific embodiment one. In this embodiment, step two is specifically implemented according to the following method:

[0036] The current state equation of the surface-mounted permanent magnet synchronous motor based on the stationary coordinate system is established as follows:

[0037]

[0038] In the formula, i α i β is the stator current; u α , u β is the stator voltage; E α ,E β for the extended back EMF.

[0039] According to the mathematical model of the surface-mounted permanent magnet synchronous motor in the two-phase stationary coordinate system, the sliding mode observer equation is constructed as follows:

[0040]

[0041] In the formula, is the observed value of the stator current; u α , u β is the control input of the observer.

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Abstract

The invention relates to a permanent magnet synchronous motor position sensorless control based on a non-singular terminal sliding mode and belongs to the technical field of motor control. The specific steps comprise a step of firstly designing an integral non-singular fast terminal sliding surface, a step of designing a sliding mode observer and designing a control rule of a terminal sliding modeobserver with the combination of a fast power approach law, and a step of performing stability analysis on the designed observers. According to the invention, the rotor position and rotation speed estimation accuracy of a permanent magnet synchronous motor can be effectively improved, the design is simple and the engineering realization is easy, and the invention has a high application value.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a method for controlling a permanent magnet synchronous motor without a position sensor based on a non-singular terminal sliding mode. Background technique [0002] The permanent magnet synchronous motor has the obvious advantages of simple structure, reliable operation, small size, light weight, low loss, high efficiency, and the shape and size of the motor can be flexible and diverse. In recent years, with the improvement of the performance of permanent magnet materials and the improvement of permanent magnet motor control technology, permanent magnet synchronous motors have been widely used in various fields of production and life. However, the permanent magnet synchronous motor is a complex object with multiple variables, strong coupling, nonlinearity and variable parameters. In actual control, in order to obtain excellent control performance, it is necessary to obtain ...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P21/18
Inventor 王仲根沐俊文
Owner ANHUI UNIV OF SCI & TECH
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