Driving circuit of motor, driving current adjusting method and air conditioning system

A technology of driving current and driving circuit, applied in the field of air-conditioning system and motor driving circuit, can solve the problems of driving failure, refrigerant can not be recovered, and the size of the driving signal does not match the motor model, so as to improve the operation stability and safety. Effect

Pending Publication Date: 2022-07-05
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a motor drive circuit, a drive current adjustment method, and an air-conditioning system to solve the problem in the prior art that the size of the drive signal does not match the model of the motor, resulting in drive failure and failure to recycle the refrigerant

Method used

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  • Driving circuit of motor, driving current adjusting method and air conditioning system
  • Driving circuit of motor, driving current adjusting method and air conditioning system
  • Driving circuit of motor, driving current adjusting method and air conditioning system

Examples

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Embodiment 1

[0058] As the refrigerant of the air-conditioning system, the content of the refrigerant is very important for the cooling effect of the air-conditioning system. If the refrigerant leaks for some reason and the content is reduced, it will affect the cooling effect of the air conditioning system, and secondly, because some refrigerants are toxic, it will cause hidden dangers to the life safety of users. Therefore, it is necessary to take measures to prevent the above-mentioned problems caused by the leakage of the refrigerant. figure 1 Schematic diagram of refrigerant recovery for the existing air conditioning system, such as figure 1 As shown, in practical applications, if refrigerant leakage occurs, the refrigerant is generally recovered to the outdoor unit by controlling the opening and closing of the valve of the inlet pipe of the outdoor unit and the closing of the valve of the outlet pipe, wherein the opening and closing of the above-mentioned valves are driven by the mot...

Embodiment 2

[0065] This embodiment provides another driving circuit for a motor, image 3 is a structural diagram of a drive circuit of a motor according to another embodiment of the present invention, as shown in image 3 As shown in the figure, in order to adjust the drive current to match the motor model when the drive current does not match the motor model, the microcontroller integrates a micro-control unit MCU, which includes: a judgment unit for judging the drive current Whether the phase of the signal is consistent with the preset phase; the first execution unit is used to control the duty cycle of the output pulse width modulated wave to remain unchanged when the phase of the driving current is consistent with the preset phase; the second execution unit, When the phase of the driving current is inconsistent with the preset phase, the duty cycle of the pulse width modulated wave output by the microcontroller is adjusted to adjust the driving current of the motor.

[0066] Specifi...

Embodiment 3

[0076] This embodiment provides an air-conditioning system, including a valve, which is arranged on an outlet pipe or an inlet pipe of an outdoor unit of the air-conditioning system, and whose opening and closing are controlled by a motor. The air-conditioning system in this embodiment also includes the above-mentioned motor. The drive circuit is used to adjust the drive current to make the drive current match the motor model when the drive current does not match the motor model, which can avoid the mismatch between the size of the drive signal and the motor model, resulting in drive failure and failure of the refrigerant to be recovered. It improves the stability and safety of the air-conditioning system.

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Abstract

The invention discloses a driving circuit of a motor, a driving current adjusting method and an air conditioning system. The driving circuit comprises a driving chip which is connected with a phase detection terminal of the motor, a microcontroller and each phase of the motor and is used for detecting the phase of a driving current of the motor and outputting a detection signal to the microcontroller; the input end of the adjusting circuit is connected with the microcontroller, and the output end of the adjusting circuit is connected to the reference voltage input end of the driving chip; and the microcontroller is used for adjusting the duty ratio of the pulse width modulation wave output by the microcontroller according to the phase of the driving current of the motor so as to adjust the reference voltage input by the driving chip, so that the driving chip adjusts the driving current of the motor based on the reference voltage. By means of the control method and device, the problems that driving fails and refrigerants cannot be recycled due to the fact that the size of the driving signal is not matched with the model of the motor can be solved, and the operation stability and safety of an air conditioner system are improved.

Description

technical field [0001] The present invention relates to the technical field of electronic circuits, and in particular, to a drive circuit of a motor, a drive current adjustment method and an air conditioning system. Background technique [0002] As the refrigerant of the air-conditioning system, the content of the refrigerant is very important for the cooling effect of the air-conditioning system. If the refrigerant leaks for some reason and the content is reduced, it will affect the cooling effect of the air conditioning system, and secondly, because some refrigerants are toxic, it will cause hidden dangers to the life safety of users. Therefore, it is necessary to take measures to prevent the above-mentioned problems caused by the leakage of the refrigerant. In practical applications, if refrigerant leakage occurs, the refrigerant is generally recovered to the outdoor unit by controlling the opening of the valve of the inlet pipe of the outdoor unit and the closing of the...

Claims

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Application Information

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IPC IPC(8): H02P23/00H02P29/40H02P8/12F24F11/88F24F11/36F24F11/46F24F11/64F16K31/04
CPCH02P23/0004H02P29/40H02P8/12F24F11/88F24F11/36F24F11/46F24F11/64F16K31/046Y02B30/70
Inventor 方林胡冠华侯彬张元辉王金壅
Owner GREE ELECTRIC APPLIANCES INC
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