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

AC frequency conversion speed regulation method simulating series excitation DC motor soft features

A technology of AC frequency conversion and speed regulation method, which is applied in the direction of AC motor control, electrical components, control system, etc., can solve problems such as excellent mechanical characteristic curve, and achieve the effect of extending cruising range, improving power factor and operating efficiency

Active Publication Date: 2015-12-16
TAIYUAN INST OF CHINA COAL TECH & ENG GROUP +1
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the mechanical characteristic curve of the existing low-voltage DC / AC variable frequency speed regulation system is too hard, the present invention provides an AC variable frequency speed regulation method for simulating the soft characteristics of the series excitation DC motor

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
  • AC frequency conversion speed regulation method simulating series excitation DC motor soft features

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] An AC frequency conversion speed regulation method for simulating the soft characteristics of a series-excited DC motor, the method is realized by the following steps:

[0013] 1) Assume that the highest speed of the AC motor when outputting the maximum torque is n1, assume that the rated speed of the AC motor is n2, assume that the highest speed of the AC motor is n3, and n1<n2<n3; connect the input end of the AC motor to the frequency converter The output terminal connection;

[0014] 2) Constant torque section control: When the AC motor is used for heavy-load starting and full-load climbing, the inverter adopts the torque vector control method to control the torque of the AC motor to maintain the maximum torque and limit the maximum power of the AC motor is the rated power, and at the same time limit the maximum speed of the AC motor to n1; when the load torque > the torque of the AC motor, the speed of the AC motor is automatically reduced; when the load torque < th...

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 frequency conversion speed regulation technology for a mine special battery vehicle, and particularly relates to an AC frequency conversion speed regulation method simulating series excitation DC motor soft features, so as to solve the problem that the mechanical feature curve of the existing low-voltage DC / AC frequency conversion speed regulation system is over rigid. The method is realized by adopting the following steps: 1) the input end of the AC motor and the output end of a frequency converter are connected; 2) when the AC motor is used for heavy-load starting and full-load climbing, the frequency converter adopts a torque vector control mode to control the torque of the AC motor to be maintained as the maximal torque; 3) when the AC motor is used for full-load level road driving, the frequency converter adopts a frequency given control mode to control the power of the AC motor to be the rated power; and 4) when the AC motor is used for idling driving, the frequency converter adopts a torque given control mode to control the torque of the AC motor to be maintained to be constant. The method of the invention is applied to the mine special battery vehicle.

Description

technical field [0001] The invention relates to the frequency conversion speed regulation technology of mine-used special storage battery vehicles, in particular to an AC frequency conversion speed regulation method for simulating the soft characteristics of a series-excited DC motor. Background technique [0002] At present, low-voltage DC / AC frequency conversion speed regulation system is generally used for traction of special mine battery vehicles to replace traditional series-excited DC motors. However, practice has shown that, compared with the traditional series-excited DC motor, although the low-voltage DC / AC variable frequency speed control system has many advantages, due to its own limitations, it cannot have the low-speed, high-torque, high-speed and small-rotation capabilities of the traditional series-excited DC motor. The soft characteristics of the moment lead to the problem of the mechanical characteristic curve being too hard, which leads to the problem of lo...

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): H02P23/00H02P27/06
Inventor 曹建文冯化刘国鹏姜铭许连丙布朋生呼守信贾运红薛志勇张小刚张爱荣
Owner TAIYUAN INST OF CHINA COAL TECH & ENG GROUP
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