Motor driving system without electrolytic capacitor and control method and device of motor driving system

A motor drive system, electrolytic capacitor technology, applied in the direction of AC motor control, control system, electrical components, etc., can solve the problems of DC bus voltage can not output enough torque, damage to electric control, motor out of control, etc., to avoid compressor motor Out of control or motor drive system damage, avoid out of control or motor drive system damage, reliable operation effect

Active Publication Date: 2016-12-07
GD MIDEA AIR-CONDITIONING EQUIP CO LTD +1
View PDF6 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, since the capacitance of film capacitors or ceramic capacitors is very small, usually only 1%-2% of the capacitance of conventional high-voltage electrolytic capacitors, when the input AC voltage changes suddenly, the DC bus voltage will also change accordingly. If the motor cannot be controlled in time, the motor will be out of control or the el

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 driving system without electrolytic capacitor and control method and device of motor driving system
  • Motor driving system without electrolytic capacitor and control method and device of motor driving system
  • Motor driving system without electrolytic capacitor and control method and device of motor driving system

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0040] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention, but should not be construed as limiting the present invention.

[0041] The following describes the electrolytic capacitor-free motor drive system and its control method and device proposed by the embodiments of the present invention with reference to the accompanying drawings.

[0042] figure 1 It is a schematic structural diagram of an electrolytic capacitor motor drive system according to an embodiment of the present invention. Such as figure 1 As shown, the electrolytic capacitor-free motor drive system includes: an input inductor 1, a rectifier circuit 2, a DC...

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 motor driving system without an electrolytic capacitor and a control method and device of the motor driving system. The method comprises the following steps of detecting an input AC voltage of the motor driving system in real time; calculating a current highest running frequency of a compressor motor according to the input AC voltage; and controlling the compressor motor according to the current highest running frequency. By the method, the current highest running frequency of the compressor motor is calculated according to the input AC voltage, the highest rotational speed of the compressor motor can be timely limited when the input AC voltage abruptly changes, so that the compressor motor is effectively prevented from being out of control or the motor driving system is effectively prevented from being damaged, and the compressor motor and the motor driving system are enabled to stably and reliably run.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to an electrolytic capacitor motor drive system and its control method and device. Background technique [0002] With the improvement of consumers' energy-saving requirements for electromechanical products, permanent magnet synchronous motors with higher efficiency have been more and more widely used. [0003] The DC bus voltage of the conventional variable frequency drive is in a stable state, and the inverter part is relatively independent of the input AC voltage, so that the control of the inverter part does not need to consider the instantaneous change of the input AC voltage, which is convenient for the realization of the control method. However, this design method needs to be equipped with an electrolytic capacitor with a large capacitance, which increases the size of the drive and increases the cost. Moreover, the life of the electrolytic capacitor is limited, and its effectiv...

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): H02P23/28
Inventor 霍军亚张国柱
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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