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A Position Predictive Control Method for Permanent Magnet Synchronous Servo System

A technology of servo system and permanent magnet synchronization, which is applied in the direction of control system, control generator, vector control system, etc., can solve the problems affecting the machining accuracy, position control overshoot, and increase of following deviation, so as to improve dynamic performance, Easy to realize and ensure the effect of position control accuracy

Active Publication Date: 2020-05-29
JIAXING DEALOUR ELECTRIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The gain setting of the position controller is related to the load driven by the motor. When the gain is too large, it will cause mechanical shock and overshoot of the position control, which are not allowed
Reducing the gain can avoid the appearance of mechanical shock and overshoot, but it will increase the following deviation and affect the processing accuracy

Method used

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  • A Position Predictive Control Method for Permanent Magnet Synchronous Servo System
  • A Position Predictive Control Method for Permanent Magnet Synchronous Servo System
  • A Position Predictive Control Method for Permanent Magnet Synchronous Servo System

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Embodiment Construction

[0043] The technical solution of the present invention is described in detail below. The embodiment of the present invention is only for illustrating a specific structure, and the scale of the structure is not limited by the embodiment.

[0044] refer to figure 1 with figure 2 , the servo motor control usually adopts a typical three-closed-loop control. According to the known literature, the permanent magnet synchronous motor model with vector decoupling under coordinate transformation can be obtained as the following formula, and the system structure is as follows: figure 1 shown; figure 1 in which G p (s), G s (s) and G i (s) are the position, speed and current controllers of the servo motor;

[0045]

[0046] The permanent magnet synchronous motor model of decoupling control is: u′ q =n p ω rm (ψ f +L a i d )-u q , u′ d = u d +n p ω rm L a i q , each parameter is

[0047] u' q , u' d are the voltage components added to the winding impedance of the ...

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Abstract

The invention discloses a position prediction control method of a permanent-magnet synchronous servo system. A speed loop and a current loop of a servo control system and a motor system are kept to beunchanged; a position loop is designed as a matrix controller; and for position controlling, a matrix controller is designed based on a position error. The invention provides a matrix controller model; and the method is stable and is easy to realize in the system.

Description

technical field [0001] The invention belongs to the technical field of automatic control, and in particular relates to a position prediction control method of a permanent magnet synchronous servo motor. Background technique [0002] In the automatic control system, the system whose output can follow the change of the input with a certain accuracy is called a servo system. The servo system is composed of a servo drive device and a servo motor. The servo system using a permanent magnet synchronous motor as a servo motor is called a permanent magnet synchronous motor servo system. [0003] As the basic key technology of CNC machine tools and industrial robots, the permanent magnet synchronous servo system plays a decisive role in the technical indicators such as the accuracy and speed of the entire motion control system. In the prior art, there are generally three control methods for a servo control system, including a speed control method, a torque control method and a positi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/18H02P21/22
Inventor 潘安远张今朝陈志长史纯自
Owner JIAXING DEALOUR ELECTRIC TECH