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Alternating current (AC) motor speed regulation circuit and air conditioner

An AC motor, AC technology, applied in the direction of AC motor control, motor control, electrical components, etc., can solve problems such as high cost, abnormal control, circuit device damage, etc., to avoid device damage, improve EMC performance, and reduce costs.

Active Publication Date: 2017-09-12
GD MIDEA AIR CONDITIONING EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide an AC motor speed regulating circuit and an air conditioner, and the purpose is to solve the problems of the existing AC motor speed regulating circuit that the cost is relatively high and the circuit components are damaged due to abnormal control

Method used

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  • Alternating current (AC) motor speed regulation circuit and air conditioner
  • Alternating current (AC) motor speed regulation circuit and air conditioner
  • Alternating current (AC) motor speed regulation circuit and air conditioner

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Embodiment Construction

[0064] 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.

[0065] refer to figure 2 , figure 2 The structural diagram of the AC motor speed regulation circuit module provided for the first embodiment of the present invention, for the convenience of description, only shows the parts related to the embodiment of the present invention, and the details are as follows:

[0066] The AC motor speed regulation circuit provided by the embodiment of the present invention includes an AC input terminal, a first rectification module 10, a load 20, a second rectification module 30, a switch module ...

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Abstract

The invention provides an AC motor speed regulation circuit and an air conditioner. The AC motor speed regulation circuit comprises an AC input end, a first rectification module, a load, a second rectification module, a switch module, a first freewheeling module, a second freewheeling module, and an MCU. The first freewheeling module or the second freewheeling module is used to supply induction electromotive force of an AC motor winding coil with a freewheeling loop, and the freewheeling loop passes through the first rectification module and the load of the circuit, and then extra electronic switch freewheeling is not required. The first freewheeling module and the second freewheeling module are formed by devices having a unidirectional conduction function, and therefore costs are reduced greatly, and during the freewheeling, the control of the MCU is not required, and the freewheeling can be realized completed by a simple hardware circuit, and therefore working reliability is high, the problem of the prior art of the damages on the devices caused by the control is prevented, and current EMC performance is improved.

Description

technical field [0001] The invention relates to the field of AC motor control, in particular to an AC motor speed regulating circuit and an air conditioner. Background technique [0002] A current AC motor speed control circuit such as figure 1 As shown, the L or N line of the AC power supply is connected in series with the AC motor, which is input to the rectifier module. The electronic switch K1 is connected in series in the two output circuits of the rectifier module. At the same time, another electronic switch K2 is connected in parallel at both ends of the motor. The MCU outputs PWM (pulse width Modulation) signal controls the conduction and cut-off of the electronic switch K1. When K1 is turned on, the AC power supply forms a current path through the AC motor, rectifier module, and K1 to provide the working current for the AC motor. When K1 is turned off, the MCU controls K2 to turn on. After K1 is closed, the induced electromotive force generated on the winding of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P25/16
CPCH02P25/16H02P29/032
Inventor 李洪涛李豪
Owner GD MIDEA AIR CONDITIONING EQUIP CO LTD
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