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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 invention provides an alternating-current motor speed regulation circuit. A first freewheel module or a second freewheel module, a rectifier module and a switch module form a motor power supply circuit to supply power to an alternating-current motor, an alternating-current power supply supplies power to the first freewheel module or the second freewheel module through the switch module, and the induced electromotive force generated on a main winding of the alternating-current motor is discharged through the first freewheel module or the second freewheel module, so that normal operation ofthe alternating-current motor is guaranteed. Moreover, each of the first freewheel module and the second freewheel module has a composite tube structure composed of two triodes. When the switch moduleis turned off, the induced electromotive force generated on the alternating-current motor is subjected to current discharge. Due to the triode composite structure, the bias current provided by the switch module for maintaining the conduction of the freewheel module is very small, so that the consumption of the bias power provided by the switch module can be greatly reduced, the size of the circuit is reduced, and the heating 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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