Middle voltage electromotor cutting wave dual DSP digital speed adjusting system for IGBT reverser

A speed control system, digital speed control technology, applied in the direction of AC motor control, control system, electrical components, etc., can solve the problems of reduced reliability, damage of boost chopper, high voltage of rotor circuit, etc., to avoid interference and Coupling, convenient and reliable use, and the effect of improving reliability

Inactive Publication Date: 2008-02-13
广东华拿东方能源有限公司
View PDF0 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, during use, it was found that setting up overturn protection brought some new problems: when the thyristor inverter overturns and cuts off its DC main circuit, it will cause the rotor circuit to open instantaneously and generate high voltage, so an overvoltage protection circuit must b

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
  • Middle voltage electromotor cutting wave dual DSP digital speed adjusting system for IGBT reverser
  • Middle voltage electromotor cutting wave dual DSP digital speed adjusting system for IGBT reverser
  • Middle voltage electromotor cutting wave dual DSP digital speed adjusting system for IGBT reverser

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046] IGBT inverter medium voltage motor chopper type dual DSP digital speed control system of the present invention, referring to Fig. 1, MD is a motor system, including motor M and its starter, control switch and power distribution and other auxiliary equipment. The speed control system FC includes the chopper type speed control main circuit using IGBT inverter and the digital intelligent control part of double DSP. In the main circuit, the uncontrollable rectifier DR in the speed control system FC is connected to the rotor winding through the brush and slip ring of the motor (KM1 and KM2 are disconnected during normal operation, and KM3 is closed), and the IGBT inverter TI is connected to the power grid through the transformer TAW . BC in the speed control system FC is a step-up chopper (composed of LS, SD, CS, C, BOD, and SCR), FR is a frequency-sensitive rheostat starter (or variable water resistance starter), KM1, KM2 and KM3 are three-phase contactors. The fast diode...

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

A chopping double-DSP digital speed governing system of a medium voltage motor having an IGBT inverter comprises an uncontrollable rectifier, a boosting chopper and an IGBT inverter. The boosting chopper and the IGBT inverter are controlled through two internal ring current controllers. The speed of an external ring of the speed governing system and the voltage of an external ring of the inverter are controlled through two DSPs. The speed governing system and a motor system are controlled in a programmable way through a programmable controller. The system is applicable for ordinary wound asynchronous motors, internal feedback wound asynchronous motors, wound-cage brushless doubly-fed motors and wound-cage internal feedback brushless motors, and eliminates the problem of damaging equipments because of inversion resulting from grid failure out and out. The invention is highly reliable, is simple and convenient to be used, has excellent man-machine interface, can achieve remote monitoring and management, is highly digitalized, saves energy and is environmentally protective; the control error is small; the means of communication is flexible; and the cost is low.

Description

technical field [0001] The invention relates to the technical field of AC motor speed regulation control, in particular to an IGBT inverter medium-voltage motor chopper type double DSP digital speed regulation system. Background technique [0002] Medium and high voltage motors are widely used to drive fans and water pumps. If speed regulation can be used to adjust air volume and water pressure, a large amount of electric energy can be saved. Therefore, the market demand for medium and high voltage speed regulation systems with excellent performance and moderate cost is very high. exuberant. The popularization and application of digital control chips represented by DSP and single-chip microcomputer and the popularization and use of fuzzy logic intelligent control strategy have laid a foundation for the digital intelligent control of medium-voltage AC asynchronous motor speed regulation. [0003] In the AC motor speed control system, the existing high-power (>200KW) mediu...

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
IPC IPC(8): H02P27/05H02P27/06
Inventor 马小亮梁惠冰
Owner 广东华拿东方能源有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap