A high-power mixed DC contactor and its control method

A DC contactor and hybrid DC technology, applied in relays, electrical components, electrical switches, etc., can solve the problems of MOSFET electrical breakdown failure and high development costs, and achieve the effect of eliminating bouncing arcs and improving electrical life.

Inactive Publication Date: 2008-09-17
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, as the power increases, the development cost of this method is higher, and it is easy to caus

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  • A high-power mixed DC contactor and its control method
  • A high-power mixed DC contactor and its control method
  • A high-power mixed DC contactor and its control method

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0020] This embodiment is a hybrid DC contactor applied to high-power occasions, which eliminates the influence of arcs during the on-off process, greatly improving the reliability of electrical contact and the electrical life of the contactor. It is composed of a high-power DC contactor and an arc extinguishing system. The arc extinguishing system is further divided into a contactor closed arc extinguishing part and a contactor disconnected arc extinguishing part. DC contactor U2 is composed of contactor bracket, dynamic and static contacts, electromagnetic coil, etc. Its control voltage is 110V, and the power supply system U1 outputs 110V power signal to the contactor coil to generate suction to make the contactor contacts close and conduct; after power failure The electromagnetic attraction disappears and the contacts separate. In normal high-pow...

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Abstract

The invention provides a high power mixed direct current contactor and a method thereof, the invention is composed of a direct current contactor main body and an arc extinguishing system. The direct current contactor comprises a movement contact, a main body bracket, an electromagnetic coil and other parts, completing switching effect. The arc extinguishing system comprises a contactor closed electric arc eliminating part and a contactor disconnection arc extinguishing part. The closed electric arc part of the mixed direct current contactor is composed of a electric source switching circuit, a signal separating and collecting circuit, a control circuit and a MOSFET drive circuit; electric power electric switch is switched on and the jumping electric arc is removed by detecting the contact closed signal; the disconnection process contact electric arc eliminating part is composed of a maintaining circuit, a judging circuit, a control switch circuit and an energy absorbing circuit, utilizing the absorption property of the electric power capacitance energy to eliminate the electric arc generated when the contactor contact breaks the high power load; design of a PCB plate distribution is optimized to reduce the influence of parasitical parameters to a maximum extent, enabling the high power mixed direct current contactor to completely eliminate the influence of the electric arc in the process of breaking operation.

Description

(1) Technical field [0001] The invention relates to a high-power hybrid DC contactor based on power electronics technology and capacitor parallel connection technology. (2) Background technology [0002] Railway is an important national infrastructure, national economic artery and popular means of transportation. Accelerating the development of railways plays an important role in promoting economic and social development and realizing the grand goal of building a well-off society in an all-round way. DC electromagnetic contactor is an electrical component widely used in the power supply system of railway locomotives and vehicles, and its reliability and life directly affect the reliability and safety of the entire system. When the DC contactor is connected or disconnected with a high-power load, there will be vibration, vibration, arcing, ablation and other phenomena of the contact, which will cause abnormal contact resistance of the contact, contact bonding and other fault...

Claims

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Application Information

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IPC IPC(8): H01H9/30H01H47/02H01H47/18
Inventor 翟国富田宇张斌瑞王淑娟沙友涛周月阁申泽军
Owner HARBIN INST OF TECH
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