Dynamic surface control of permanent magnet synchronous motor based on load torque feedback

A permanent magnet synchronous motor, dynamic surface control technology, applied in the direction of motor generator control, electronic commutation motor control, control system, etc., can solve the problems of control system performance degradation, achieve good ability to deal with sudden changes, simple design, achieve easy results

Inactive Publication Date: 2019-07-09
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 that the performance of the control system decreases due to load changes during the operation of the permanent magnet synchronous motor, and proposes a dynamic surface control of the permanent magnet synchronous motor based on load torque feedback method

Method used

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  • Dynamic surface control of permanent magnet synchronous motor based on load torque feedback
  • Dynamic surface control of permanent magnet synchronous motor based on load torque feedback
  • Dynamic surface control of permanent magnet synchronous motor based on load torque feedback

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Experimental program
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specific Embodiment approach 1

[0021] Specific implementation mode one: refer to figure 1 Specifically illustrate this embodiment, the dynamic surface control method of a permanent magnet synchronous motor based on load torque feedback described in this embodiment, the method includes the following steps:

[0022] Step 1. A mathematical model of the permanent magnet synchronous motor is established, and a new type of state variable equation is defined.

[0023] Step 2. Design a new dynamic surface sliding mode controller based on the new state variable equation.

[0024] Step 3. Perform stability analysis on the designed observer.

[0025] Step 4. Design a disturbance observer based on exponential convergence to obtain the load torque feedback.

[0026] In this embodiment, the application proposes a dynamic surface control method for permanent magnet synchronous motors based on load torque feedback. By designing a new state variable equation of the permanent magnet synchronous motor system, the response o...

specific Embodiment approach 2

[0027] Embodiment 2: This embodiment is to further explain the dynamic surface control of the permanent magnet synchronous motor based on load torque feedback described in Embodiment 1. In this embodiment, Step 1 is specifically implemented in accordance with the following steps:

[0028] Establish the mathematical model of the surface-mounted permanent magnet synchronous motor in the d-q coordinate system:

[0029]

[0030] In the formula: u d , u q are the d-q axis components of the stator voltage; i d i q are the d-q axis components of the stator current; L s is the stator inductance; R is the stator resistance; ψ f is the permanent magnet flux linkage; ω m is the mechanical angular velocity of the motor; p n is the pole logarithm; T L Is the load torque; J is the moment of inertia; B is the damping coefficient.

[0031] For surface-mounted permanent magnet synchronous motors, using i d = 0, the rotor field-oriented control method can obtain a better control eff...

specific Embodiment approach 3

[0037] Specific embodiment three: This embodiment is to further illustrate the dynamic surface control of the permanent magnet synchronous motor based on load torque feedback described in the second specific embodiment. In this embodiment, step two is specifically implemented according to the following method:

[0038] Define the position error:

[0039] z 1 =x 1 -x 1d (25)

[0040] where x 1d is the instruction signal, then

[0041] Define the Lyapunov function

[0042]

[0043] but

[0044]

[0045] definition

[0046] z 2 =x 2 -α 1 (28)

[0047] but

[0048]

[0049] Pick but begging There will be a differential explosion when , so a low-pass filter is used to obtain it. take α 1 for low pass filter output, define and meet

[0050]

[0051] From formula (30) can get The resulting filter error is

[0052] Taking into account position tracking, virtual control and filtering errors, define the Lyapunov function

[0053]

[0054...

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Abstract

The invention relates to dynamic surface control of a permanent magnet synchronous motor based on load torque feedback, which belongs to the technical field of motor control. The dynamic surface control comprises the following steps: first, a mathematical model of a permanent magnet synchronous motor is established, a novel state variable equation is defined, and a novel dynamic surface sliding mode controller is designed based on the novel state variable equation; and then, a disturbance observer based on exponential convergence is designed to obtain the load torque feedback quantity, and high-precision observation of load torque is realized. According to the invention, the problem that the performance of the control system decreases due to the load change of the permanent magnet synchronous motor during operation can be solved, and the anti-disturbance capability of the permanent magnet synchronous motor control system can be improved. Moreover, the dynamic surface control is simplein design and easy to implement, and has high application value.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a dynamic surface control of a permanent magnet synchronous motor based on load torque feedback. 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 perfection of permanent magnet motor control technology, permanent magnet synchronous motors have been widely used in the industrial field. However, the permanent magnet synchronous motor is a complex object with multiple variables, strong coupling, nonlinearity and variable parameters. In order to obtain excellent control performance, some reliable control algorithms need to be studied. At present, the speed controller in the three-p...

Claims

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Application Information

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IPC IPC(8): H02P21/00
CPCH02P21/0003
Inventor王仲根沐俊文
OwnerANHUI UNIV OF SCI & TECH