Motor speed regulating voltage Vsp cut-off circuit of air conditioning system of brushless motor

A voltage cut-off, air-conditioning system technology, applied in the direction of a single motor speed/torque control, machine/engine, emergency protection circuit devices, etc. Unsatisfactory, motor damage and other problems, to improve operation safety and reliability, avoid motor damage, and solve the effect of simple control circuit

Active Publication Date: 2015-03-04
CHINA YANGZI GRP CHUZHOU YANGZI AIR CONDITIONERCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The heating capacity of fixed-speed air conditioners and the noise of AC motors have been bothering technicians in the industry, making the use of fixed-speed air conditioners unsatisfactory
There is no cut-off circuit for indoor and outdoor motors, which is easy to cause damage to the motor when the power is cut off

Method used

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  • Motor speed regulating voltage Vsp cut-off circuit of air conditioning system of brushless motor
  • Motor speed regulating voltage Vsp cut-off circuit of air conditioning system of brushless motor
  • Motor speed regulating voltage Vsp cut-off circuit of air conditioning system of brushless motor

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Embodiment Construction

[0022] see Figure 6 and Figure 7 , the motor speed regulation voltage Vsp cut-off circuit of the brushless motor air-conditioning system, including the indoor motor speed regulation voltage cut-off circuit and the outdoor motor speed regulation voltage cut-off circuit; the indoor motor speed regulation voltage cut-off circuit includes the first voltage dividing and shaping circuit, the first DC voltage detection circuit and Vsp1 voltage cut-off circuit; the first voltage divider shaping circuit is composed of resistor R21, resistor R22 and capacitor EC8; the first DC voltage detection circuit includes voltage regulator tube Z3, resistor R23 and transistor Q2; Vsp1 voltage cut-off circuit includes Resistors R24-R26, switch transistor Q3, wherein the switch transistor Q3 is used as the executive element of the Vsp1 voltage cut-off circuit; the resistor R26 is connected to the indoor DC fan motor speed control circuit of the brushless motor air-conditioning system;

[0023] Th...

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Abstract

The invention discloses a motor speed regulating voltage Vsp cut-off circuit of an air conditioning system of a brushless motor. The cut-off circuit comprises an indoor motor speed regulating voltage cut-off circuit and an outdoor motor speed regulating voltage cut-off circuit, wherein the indoor motor speed regulating voltage cut-off circuit comprises a first partial voltage shaping circuit, a first direct-current voltage detection circuit and a Vsp1 voltage cut-off circuit; and the outdoor motor speed regulating voltage cut-off circuit comprises a second partial voltage shaping circuit, a second direct-current voltage detection circuit and a Vsp2 voltage cut-off circuit. The cut-off circuit disclosed by the invention has the advantages that indoor and outdoor fan motors are prevented from being damaged when power failure occurs, the operational safety and reliability of the motor is improved, and the like.

Description

technical field [0001] The invention relates to a motor speed regulating voltage Vsp cut-off circuit of a brushless motor air-conditioning system. Background technique [0002] The heating capacity of fixed-speed air conditioners and the noise of AC motors have been bothering technicians in the industry, making the use of fixed-speed air conditioners unsatisfactory. In the existing fixed-speed air conditioners, most of the indoor and outdoor fan motors use AC induction motors, and most of the outdoor motors are controlled by one gear of speed. When the power grid voltage is high, the noise of the outdoor motor is too large; when the power grid voltage is low, the speed of the outdoor motor is too low and the heat dissipation effect is poor. Although a small number of high-efficiency fixed-speed air conditioner fans use DC brushless motors, only outdoor fan motors use DC brushless motors, and their control is extremely simple, only providing a fixed driving voltage for the D...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/08H02P6/08F24F11/00F04D27/00
Inventor 方立勇张婷
Owner CHINA YANGZI GRP CHUZHOU YANGZI AIR CONDITIONERCO
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