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Fault detection circuit and electronic equipment

A fault detection circuit and voltage detection technology, applied in the direction of measuring current/voltage, measuring electricity, measuring electrical variables, etc., can solve problems such as failure to detect stepper motors or drive circuits

Pending Publication Date: 2022-03-01
NINGBO AUX ELECTRIC +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of this application is to provide a fault detection circuit and electronic equipment to solve the problem in the prior art that the stepper motor or drive circuit cannot be fault detected

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  • Fault detection circuit and electronic equipment
  • Fault detection circuit and electronic equipment

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Embodiment Construction

[0025] In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0026] As mentioned in the background technology, at present, when the stepper motor of the expansion valve of the air conditioner is working, open circuit, short circuit or abnormality of the drive circuit may occur, which may cause the expansion valve angle to be wrong, which in turn affects the system pressure and causes the air conditioner to be abnormal.

[0027] In view of this, in order to realize fault detection, this application provides a fault detection circuit, which collects the working current of the stepper motor by setting a differential operation amplifier module, and sends related signals to the controller, so that the control The controller determines whether the drive module or the stepper motor is faulty.

[0028] The ...

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Abstract

The invention provides a fault detection circuit and electronic equipment, and relates to the technical field of fault detection. The fault detection circuit comprises a controller, a differential operation amplification module and a driving module, the controller is electrically connected with the differential operation amplification module and the driving module, the differential operation amplification module is further electrically connected with the driving module, and the driving module is used for being connected with a stepping motor; wherein the differential operation amplification module is used for collecting working current of the stepping motor and outputting detection voltage to the controller according to the working current; the controller is used for determining whether the driving module or the stepping motor fails or not according to the detection voltage and a preset first voltage when the stepping motor does not work; the controller is further used for determining whether the driving module or the stepping motor breaks down or not according to the detection voltage and a preset second voltage when the stepping motor works. According to the fault detection circuit and the electronic equipment provided by the invention, fault detection of the driving module and the stepping motor can be accurately realized.

Description

technical field [0001] The invention relates to the technical field of fault detection, in particular to a fault detection circuit and electronic equipment. Background technique [0002] The existing air-conditioning technology is developing rapidly. Because of the advantages of the expansion valve, the pressure of the air-conditioning system is gradually changed from capillary regulation to expansion valve regulation. The drive of the expansion valve is basically a stepping motor, while the control of the stepping motor in the prior art is basically In open loop, the angle of the expansion valve is controlled entirely by reset and counting steps. When the stepper motor is open circuited, short-circuited or the circuit of the stepper motor is abnormal, the expansion valve angle may be wrong, which will affect the system pressure and cause the air conditioner to be abnormal. [0003] However, there is currently no relevant detection circuit designed for stepping motor or driv...

Claims

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Application Information

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IPC IPC(8): G01R31/34G01R31/28G01R31/52G01R31/54G01R19/165
CPCG01R31/34G01R31/343G01R31/2836G01R19/16576G01R31/52G01R31/54
Inventor 赵新荣
Owner NINGBO AUX ELECTRIC
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