Unlock instant, AI-driven research and patent intelligence for your innovation.

Method, device and system for controlling excitation converter of electrically excited synchronous motor

A technology of excitation current and synchronous motor, applied in the direction of motor generator control, electronically commutated motor control, control system, etc., can solve problems such as complex control algorithm, system interference, and phase calculation error of the control system, so as to reduce reactive power , improve the power factor, improve the effect of reliability

Pending Publication Date: 2021-05-07
CHAJNA MAJNING DRAJVS EHND AUTOMEHJSHN KO
View PDF15 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the excitation current of electrically excited synchronous motors is mostly obtained by means of AC-DC conversion. This control method is based on the phase control of the power grid to control the on-off of power semiconductor devices. The control algorithm is complex and requires hardware to collect the grid voltage. Risk of phase calculation errors in the control system due to disturbances

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method, device and system for controlling excitation converter of electrically excited synchronous motor
  • Method, device and system for controlling excitation converter of electrically excited synchronous motor
  • Method, device and system for controlling excitation converter of electrically excited synchronous motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0066] In order to deepen the knowledge and understanding of the present invention, the technical solutions of the present invention will be further introduced below in conjunction with the accompanying drawings and specific embodiments.

[0067] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the invention. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. Based on the embodiments of the prese...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method, device and system for controlling an excitation converter of an electrically excited synchronous motor. The method comprises the steps of calculating a corresponding excitation current given value according to the starting state of the motor; carrying out excitation current proportional-integral regulation control on the excitation current given value and the excitation current feedback value; taking the proportional-integral regulation control output as an expected value of the output direct current voltage; and comparing the expected value of the output direct current voltage with the triangular carrier wave to generate a PWM signal to control the on-off of the IGBT, thereby realizing the control on the excitation current and further realizing the control on the main magnetic field of the electrically excited synchronous motor. The alternating current-direct current conversion mode adopted in the prior art is changed, the power grid voltage phase does not need to be collected, the reliability of the system is improved, and the dependence of the control system on the power grid voltage phase is reduced.

Description

technical field [0001] The invention relates to the field of motor control, in particular to an excitation control method, device and system for an electric excitation synchronous motor. Background technique [0002] Because the excitation of electric excitation synchronous motor can be adjusted independently, the stability of the motor magnetic field and the adjustable power factor can be realized by adjusting the excitation current, which is suitable for high-power transmission occasions. [0003] In the prior art, the excitation current of electrically excited synchronous motors is mostly obtained by means of AC-DC conversion. This control method is based on the phase control of the power grid to control the on-off of power semiconductor devices. The control algorithm is complex and requires hardware to collect the grid voltage. Risk of disturbances leading to phase calculation errors in the control system. [0004] How to reduce the control complexity of the rotor excit...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/22H02P21/14H02P21/00H02P25/03
CPCH02P21/22H02P21/14H02P21/0003H02P25/03
Inventor 谭国俊杨波封安波盛朗孙璐
Owner CHAJNA MAJNING DRAJVS EHND AUTOMEHJSHN KO