Motor frequency change servo controlling system

A technology of servo control system and motor, applied in the field of frequency conversion servo control system, can solve the problems of unusable, high cost, speed-up limit of rotor centrifugal effect, etc., achieve simple manufacturing process, low manufacturing cost, and improve various performance indicators.

Inactive Publication Date: 2003-04-30
中国敏捷集团有限公司
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are the following problems: the brush motor needs frequent maintenance, cleaning, and replacement of brushes, which brings about high maintenance costs; the temperature rise or vibration of the motor will cause the permanent magnet to weaken or fall off, causing the output power of the motor to drop or even There are accidents involving personal safety; due to the weak magnetic field of the permanent magnet and the spark of the commutator, it is difficult to start directly from a static state; and due to the spark of the commutator, it cannot be used in some specific fields (such as explosion-proof) and it is difficult to speed up
Its principle is the same as that of the DC servo machine, so its control is more complicated than the above-mentioned DC machine, the control is difficult, and the cost is high. At the same time, there are problems of weakening or falling off of the permanent magnet caused by high temperature or vibration.
In addition, due to the weakening of the permanent magnet, the capacity of the motor is limited to a certain extent, and the centrifugal effect of the rotor limits the speed increase to a certain extent

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
  • Motor frequency change servo controlling system
  • Motor frequency change servo controlling system
  • Motor frequency change servo controlling system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] Fig. 1 is a schematic diagram illustrating the control principle of the control system of the present invention. The three-phase AC asynchronous motor is a rotating magnetic field generated by the current flowing through the stator coil to make the rotor rotate. The induced current of the rotor is proportional to the speed difference between the speed of the rotating magnetic field and the rotor (called slip or slip). In order to ensure that the rotating magnetic field and the induced current maintain an orthogonal relationship, AC vector control is required. Therefore, compared with DC servo motors and AC synchronous servo motors, its control is much more difficult. The invention integrates an AC vector control unit into an SOC CPU through microelectronic technology and semiconductor power module technology, and integrates a three-phase AC asynchronous motor control power supply into an ASIPM or SIMP. The principle is to input the required control mode to the SOC CPU ...

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 servo control system of frequency conversion for motor includes a squirrel-cage motor, a main loop part consisting of rectifying, filtering and contravariant circuits which are connected between the outer power supply and the squirrel-cage motor, a power supply part for providing power supply to the control main panel, and the control loop part integrating of chip in system grade, intelligent power module and output-input circuit. The system which uses AC squirrel-cage motor with three-phase in low cost, long service life and no requirement of permanent magnet as well as the intelligent control can control the position, rotary speed, accelerated speed and output torque of the motor in any size effectively through the programing.

Description

technical field [0001] The invention relates to a frequency conversion servo control system, in particular to a motor frequency conversion servo control system. Background technique [0002] With the rapid development of microelectronics technology and power semiconductor technology, frequency conversion technology has made great progress in AC asynchronous motors, which account for 85% of the total power load. As we all know, DC brushed servo motors and AC brushless servo motors occupy the mainstream position in the control field at present. [0003] The rotation of the DC brushed servo motor is a constant magnetic field generated by the permanent magnet on the stator side. After the rectification of the rotor, a current orthogonal to the stator magnetic field passes through the armature coil of the rotor to generate a turning force. This orthogonal relationship is automatically maintained by the brushes and the commutator, so the control is relatively simple. However, th...

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)
Inventor 张湘月
Owner 中国敏捷集团有限公司
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