Normally-closed type power supply main switch device and automatic power off method of automatic short circuit

A technology of power switch and switchgear, which is applied in the direction of overcurrent protection, protection switch operation/release mechanism, etc., which can solve the problems of vehicle fire, failure to automatically cut off the vehicle power supply in time, and achieve the effect of improving safety

Active Publication Date: 2013-01-30
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a normally closed power supply main switch that works automatically. The current sampling unit is used inside the switch to detect whether there is a short circuit, and when the short circuit occurs, the vehicle power supply is automatically cut off. The vehicle power supply, when the short circuit cannot automatically cut off the vehicle power supply in time, the vehicle fire problem caused

Method used

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  • Normally-closed type power supply main switch device and automatic power off method of automatic short circuit

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with embodiment. Such as figure 1 Shown:

[0016] A normally closed power switch device, comprising a housing (1), a terminal (4), a current transformer (5), a power conversion chip (6), a main control chip (7), a MOS tube (8), Moving contact (9), static contact (10), spring (11), battery (12), electromagnetic coil (13), steel column (14), iron core (15), wherein the power conversion chip (6) is The main control chip (7) provides voltage, which can convert the voltage of 12V to 5V, and the drain of the MOS tube (8) is connected to the control terminal of the electromagnetic coil (13); the source of the MOS tube (8) is connected to the battery (12) Negative connection; MOS tube grid is connected to the main control chip (7); the power supply end of the electromagnetic coil (13) is normally connected to the positive pole of the storage battery (12); the electromagnetic coil (13) is wound on the iron co...

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Abstract

The invention relates to a normally-closed type power supply main switch device which comprises a shell (1), a current sampling unit connected with an integral load, a main control chip (7), a movable contact (9) and a static contact (10), wherein a magnetic coil (13) is wound on an iron core (15) and a steel column (14), and the magnetic coil (13) is supplied with power by a storage battery (12). The normally-closed type power supply main switch device is characterized by also comprising switch parts respectively connected with the magnetic coil (13) and the main control chip (7); the current sampling unit is respectively connected with the static contact and the main control chip; and the main control chip (7) collects a signal of a start switch (2) and a current signal of the current sampling unit for controlling the switch parts.

Description

technical field [0001] The invention belongs to the technical field of automatic control, and relates to a normally-closed power supply master switch device. Background technique [0002] The main power switch of the car is divided into electromagnetic type and mechanical type. The electromagnetic type is to control the switch to connect the electromagnetic coil circuit, and use the electromagnetic suction to connect the moving contact with the static contact, so as to connect the electrical load of the vehicle to the power supply of the vehicle; The mechanical type is to use manpower to pull the switch handle to connect the moving contact with the static contact and turn on the power supply of the vehicle. Whether it is an electromagnetic or mechanical power switch, its purpose is to cut off the power supply of the vehicle when the vehicle circuit fails (short circuit, fire, etc.), so as to avoid the occurrence of vicious events such as vehicle burning and personal injury. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H71/24H02H3/08
Inventor 王宜海韩勇蔡敏周积茂王明明
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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