Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A control method for the start-up process of a high-power doubly salient motor drive system

A doubly salient motor, starting process technology, applied in motor generator/starter, reduction gear of AC motor, starter of a single DC motor, etc., can solve soft start overheating, grid side overcurrent, soft start switch Problems such as large current demand, to achieve the effect of improving reliability and reliable starting operation

Active Publication Date: 2016-08-24
无锡市亿东电子有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to ensure the reliable voltage build-up of the PWM converter on the grid side, it is usually necessary to reduce the output voltage at the light load or no-load to establish the output voltage of the DC side. Serious overcurrent phenomenon occurs on the grid side during the voltage building process of the rectifier, and the current demand for its soft start switch is very large, resulting in overheating of the soft start, unable to operate normally, and affecting the normal voltage building of the grid side system

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
  • A control method for the start-up process of a high-power doubly salient motor drive system
  • A control method for the start-up process of a high-power doubly salient motor drive system
  • A control method for the start-up process of a high-power doubly salient motor drive system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] See figure 1 , figure 2 As shown, the soft-start switch 1, the input filter 2, and the grid-side converter 3 are connected to the grid-side controller 4 to form a grid-side control system, and the doubly salient pole motor 5 and the generator-side converter 6 are connected to the generator-side driver 7 to form a machine side control system, one side of the grid-side control system is connected to the power grid 8, and the grid-side converter 3 and the generator-side converter are decoupled and connected through the DC filter capacitor C4, wherein the soft-start switch 1 is composed of switches S1~S3, S4~S6 and Composed of resistors R1~R3, switches S4~S6 and resistors R1~R3 ​​form a current limiting circuit, switches S1~S3 are the main switches, and the soft start switch 1 can be cut off by closing the main switches S1~S3 to realize short circuit; input filter The device 2 is composed of inductors L1~L3, capacitors C1~C3, and inductors L4~L6. It uses an LCL filter str...

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 relates to the technical field of motor control, in particular to a control method of the starting process of a drive system of a high-power double-salient-pole motor. The motor side of the system does not obviously impact the high-power double-salient-pole motor, so that reliable starting and running of the high-power double-salient-pole motor are guaranteed; meanwhile, the power factor of the network side is guaranteed, and the reliability of the system is effectively improved. A soft start switch, an input filter and a network-side converter of the system are connected with a network-side controller to form a network-side control system. The double-salient-pole motor and a motor-side converter are connected with a motor-side driver to form a motor-side control system. One side of the network-side control system is connected with a power grid. The network-side converter and the motor-side converter are connected through a direct-current filtering capacitor in a decoupling mode. The network-side control system and the motor-side control system conduct signal interaction through control ports and coordinate with each other for control. When the direct current side output voltage is constant, the starting current of the double-salient-pole motor is set to be a rated value, the double-salient-pole motor operates in a maximum torque starting control mode, and starting control of the double-salient-pole motor is completed quickly.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a method for controlling the start-up process of a high-power doubly salient motor drive system. Background technique [0002] As the application fields of motor drive systems are becoming more and more widespread, in high-power drive occasions, such as central air-conditioning drive systems, large machine tool drive systems, etc., due to the very large capacity of the drive system, the AC-DC-AC conversion used in traditional motor drive inverters In the inverter system, the grid-side AC-to-DC converter adopts the diode rectification method. Due to the nonlinear characteristics of the diode, a large amount of high-order harmonic current will be generated in the grid, which will cause serious harmonic pollution and reactive power increase to the grid. , endangering the power quality of the power grid. In order to ensure the safe and economical operation of power grids and h...

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 Patents(China)
IPC IPC(8): H02P1/18
Inventor 魏佳丹郑青青周勇何健
Owner 无锡市亿东电子有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com