Dead-beat prediction current control method for permanent magnet synchronous motor

A technology of permanent magnet synchronous motor and current prediction, applied in the direction of motor control, motor generator control, AC motor control, etc., can solve the problems of inductance parameter disturbance and so on

Active Publication Date: 2020-08-18
TIANJIN UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the existing methods, to propose a permanent magnet synchronous motor deadbeat current control method based on the dynamic proportional coefficient, and to solve the problems caused by digital problems in t

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  • Dead-beat prediction current control method for permanent magnet synchronous motor
  • Dead-beat prediction current control method for permanent magnet synchronous motor
  • Dead-beat prediction current control method for permanent magnet synchronous motor

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Embodiment Construction

[0034] The embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0035] The deadbeat predictive current control method of the permanent magnet synchronous motor based on the dynamic proportional coefficient in this embodiment is realized on the basis of the hardware of the general digital control drive system of the permanent magnet synchronous motor. The most basic hardware includes a digital signal processor (DSP), a contactless Hall current sensor, a position sensor, an inverter, a DC power supply, and a permanent magnet synchronous motor.

[0036] The block diagram of the control system that realizes the present invention's dead-beat predictive current control method for permanent magnet synchronous motors based on dynamic proportional coefficients is as follows: figure 1 As shown, its control system includes a signal acquisition module, a coordinate transformation module, a speed controller, a load ...

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Abstract

The invention discloses a dead-beat prediction current control method for a permanent magnet synchronous motor. The method aims at overcoming the defects of: easily influencing the permanent magnet synchronous motor by digital system delay, inductance parameter mismatching and the like when dead-beat prediction current control is carried out, mainly observing load torque and obtaining a dynamic proportionality coefficient according to a preset dynamic proportionality coefficient expression; and combining the stator current sampling value of the current period, the stator current estimation value of the next period and the stator current instruction value through a dynamic proportionality coefficient, and performing dead-beat prediction current control by taking the combined value as feedback current in a prediction current controller, so that high-performance control on the permanent magnet synchronous motor is achieved. On the premise that the dynamic response speed of the control system is kept, the problem that the control system is influenced by digital system delay and inductance parameter disturbance is solved, the transient response performance of the system is enhanced, andthe robustness of the system is improved.

Description

technical field [0001] The invention relates to the technical field of control of permanent magnet synchronous motors, in particular to a deadbeat prediction current control method of permanent magnet synchronous motors based on dynamic proportional coefficients. Background technique [0002] Permanent magnet synchronous motor has the advantages of high efficiency, high power density, high reliability, simple structure, small size, etc., and with the continuous improvement of the performance of permanent magnet materials in recent years, it is widely used in machining, aerospace, rail transit And other high-performance servo industry. In the existing permanent magnet synchronous motor control technology, we usually use vector control for it, specifically including the double closed-loop control of the speed outer loop and the current loop, in which the design of the current loop determines the dynamic response speed of the permanent magnet synchronous motor control system A...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P21/13H02P21/14H02P21/18H02P21/20H02P21/22H02P25/022
CPCH02P21/0003H02P21/13H02P21/14H02P21/18H02P21/20H02P21/22H02P25/022H02P2207/05
Inventor 陈益广李正时
Owner TIANJIN UNIV
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