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Controller PI parameter tuning method based on rotational inertia of motor

A technology of moment of inertia and parameter tuning, applied in motor control, motor generator control, AC motor control, etc., can solve the problems of slowing down the dynamic response of the system, unstable control system, reducing the stability of the control system, etc., to improve the stability performance, improved accuracy and rapidity

Inactive Publication Date: 2016-08-17
DONGHUA UNIV
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AI Technical Summary

Problems solved by technology

The change of the moment of inertia will reduce the stability of the entire control system
This will not only slow down the dynamic response of the system, but also cause the instability of the entire control system

Method used

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  • Controller PI parameter tuning method based on rotational inertia of motor
  • Controller PI parameter tuning method based on rotational inertia of motor
  • Controller PI parameter tuning method based on rotational inertia of motor

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Embodiment Construction

[0027] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0028] The present invention relates to a speed controller PI parameter tuning method based on the moment of inertia of the motor. The prerequisite is that the moment of inertia of the motor needs to be identified. Therefore, it is necessary to establish an identification model for the moment of inertia of the motor. According to the principle of the model reference adaptive algorithm, the establishment The reference model abou...

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Abstract

The invention relates to a controller PI parameter tuning method based on rotational inertia of a motor. Firstly, the rotational inertia of the motor is recognized, and then speed controller PI parameters are adjusted according to the relation between the rotational inertia and the PI parameters and the minimum resonance peak principle. According to the method, a rotation speed signal and a current signal of the motor are acquired, the motor is controlled through a rotation speed calculation module, coordinate conversion, a PI controller, SVPWM and IGBT reverse transformation, then output rotation speed and current serve as input of a recognition module, an S function is set according to the feedback principle, error accumulation values between rotation inertias J in different time periods are calculated, and different gain factors are selected according to different errors so as to improve recognition accuracy and quickness. After the rotational inertia is recognized, the speed controller PI parameters are adjusted according to the relation between the rotational inertia and the PI parameters, and stability and anti-interference capacity of a system are improved.

Description

technical field [0001] The invention relates to the technical field of automatic control, in particular to a controller PI parameter tuning method based on the moment of inertia of a motor. Background technique [0002] With the development of modern control technology and the improvement of motor technology, permanent magnet synchronous motors have been widely used in servo applications due to their small size and large air gap flux density. In recent years, the development of industrialization has put forward higher requirements for the speed and precision of the servo system. [0003] At present, the commonly used permanent magnet synchronous motor basically adopts a three-loop control structure, in which the inner loop is a current control loop, the middle loop is a speed control loop, and the outer loop is a position loop. The controller uses a PI regulator. The function of the current loop is to improve the rapidity of the system and suppress the internal interference...

Claims

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Application Information

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IPC IPC(8): H02P21/14H02P25/022
CPCH02P21/143H02P2207/05
Inventor 周武能钱炜李倩倩柳鑫周琳
Owner DONGHUA UNIV
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