Alternating-current motor speed regulation circuit

A technology of AC motor and AC power supply, applied in the direction of AC motor control, electrical components, control system, etc., can solve the problems of increasing the cost of related components and high power consumption of related components, reducing heating loss, reducing bias power consumption, Volume saving effect

Pending Publication Date: 2018-02-02
GD MIDEA AIR-CONDITIONING EQUIP CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to provide an AC motor speed control circuit, and the purpose is to solve the problem of high power consumption of related components in the existing AC motor speed control circuit, which leads to an increase in the cost of related components

Method used

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  • Alternating-current motor speed regulation circuit
  • Alternating-current motor speed regulation circuit
  • Alternating-current motor speed regulation circuit

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Embodiment Construction

[0041] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0042] refer to figure 1 , figure 1 The structural diagram of the AC motor speed control circuit provided for the first embodiment of the present invention, for the convenience of explanation, only shows the parts related to the embodiment of the present invention, and the details are as follows:

[0043] The speed regulation circuit of the AC motor 60 provided by the embodiment of the present invention includes a first freewheeling module 10, a second freewheeling module 20, a rectifier module 30, a switch module 40 and an MCU5...

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Abstract

The present invention provides an AC motor speed regulating circuit, which includes a motor power supply circuit composed of a first freewheeling module or a second freewheeling module, a rectifier module and a switch module to supply power to the AC motor, and the AC power supply is the first continuous current through the switch module. The conduction power supply of the current module or the second freewheeling module realizes the discharge of the induced electromotive force generated on the main winding of the AC motor through the first freewheeling module or the second freewheeling module, thereby ensuring the normal operation of the AC motor . Moreover, the first freewheeling module and the second freewheeling module are composite tube structures composed of two triodes respectively. When discharging the induced electromotive force generated by the AC motor when the switch module is closed, due to the composite structure of the triodes, it passes The bias current provided by the switch module to maintain the conduction of the above-mentioned freewheeling module is very small, so the bias power consumption provided by the switch module can be greatly reduced, the volume of this part of the circuit is saved, and the heat loss is reduced.

Description

technical field [0001] The invention relates to the field of AC motor control, in particular to an AC motor speed regulating circuit. Background technique [0002] A current AC motor speed control circuit controls the high-speed switching of the electronic switch through the controller to output high-speed PWM (pulse width modulation) signals to realize the speed control of the AC motor, but the circuit has components that consume too much power and cause serious heating. At the same time, due to the high power consumption of the device, it is necessary to use bulky components, which leads to an increase in cost. Contents of the invention [0003] The main purpose of the present invention is to provide an AC motor speed regulating circuit, and the purpose is to solve the problem of high power consumption of related components in the existing AC motor speed regulating circuit, which leads to an increase in the cost of related components. [0004] In order to achieve the ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P27/08
CPCH02P27/08
Inventor 李洪涛
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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