Electromagnetic valve drive device with fault diagnosis function and self-protection function

A solenoid valve driving and fault diagnosis technology, which is applied to valve devices, valve operation/release devices, valve details, etc., can solve problems such as poor judgment accuracy, large amount of CPU resources, and slow response speed

Inactive Publication Date: 2015-11-11
苏州市大力电器有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

This method occupies a large amount of CPU resources, has slow response speed, and poor judgment accuracy, especially in the fault diagnosis of high-speed switching solenoid valves.

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  • Electromagnetic valve drive device with fault diagnosis function and self-protection function

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Embodiment Construction

[0015] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0016] figure 1 It is a structural block diagram of a solenoid valve drive device with fault diagnosis and self-protection functions in an embodiment of the present invention; the solenoid valve drive device includes a microcontroller ECU, a driver, a high-voltage drive MOSFET switch, a low-voltage drive MOSFET switch, a low-side MOSFET switch, a current Sampling comparison circuit and CPLD logic module, described microcontroller ECU is respectively connected driver and CPLD logic module, and described driver and CPLD logic module are respectively connected three MOSFET switches, and described current sampling comparison circuit is connected low-e...

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Abstract

The invention discloses an electromagnetic valve drive device with a fault diagnosis function and a self-protection function. The electromagnetic valve drive device comprises a microcontroller ECU, a driver, a high-voltage drive MOSFET switch, a low-voltage drive MOSFET switch, a lower-end MOSFET switch, a current sampling and comparing circuit and a CPLD logic module. The microcontroller ECU is connected with the driver and the CPLD logic module. The driver and the CPLD logic module are connected with the three MOSFET switches. The current sampling and comparing circuit is connected with the lower-end MOSFET switch and the CPLD logic module. The electromagnetic valve drive device with the fault diagnosis function and the self-protection function is simple in structure. Different faults of an electromagnetic valve are quickly detected by means of the CPLD technology. Besides, the electromagnetic drive device is protected when the faults happen. The electromagnetic valve drive device has the excellent performance of being accurate in fault judgment, high in response speed and few in occupied CPU resource.

Description

technical field [0001] The invention relates to a solenoid valve drive device, in particular to a solenoid valve drive device with fault diagnosis and self-protection functions, belonging to the technical field of electric appliances. Background technique [0002] There are two main types of solenoid valve faults: open circuit and short circuit. The open circuit fault is manifested as: during the working process of the solenoid valve, due to collision, vibration and other reasons, the wiring harness of the solenoid valve is not well connected or the coil itself is broken, resulting in an open circuit in the drive circuit or an increase in the resistance of the electromagnetic coil; when the open circuit fault occurs , the current in the solenoid valve is always zero or rises slowly. The short-circuit fault is manifested as: during the working process of the solenoid valve, due to factors such as collision and vibration, the wrong contact of different wire harnesses is cause...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K31/06F16K37/00
CPCF16K31/06F16K37/0025
Inventor 陈平
Owner 苏州市大力电器有限公司
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