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Controller for electromagnetic system of universal contactor

An electromagnetic system and contactor technology, applied in the direction of circuits, relays, electrical components, etc., can solve the problems of low connection capacity, unreliable pull-in, low breaking capacity, etc., achieve long electrical life, shorten arcing time, and break fast effect

Inactive Publication Date: 2004-01-21
ZHEJIANG CHINT ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] What the present invention aims to solve is that the existing contactors have long freewheeling time when breaking, low breaking capacity, no short-circuit protection function, large vibration of contacts and iron core when closing, unreliable pull-in and low connecting capacity The problem

Method used

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  • Controller for electromagnetic system of universal contactor
  • Controller for electromagnetic system of universal contactor
  • Controller for electromagnetic system of universal contactor

Examples

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Embodiment Construction

[0020] figure 1 Shown is the schematic diagram of the existing AC contactor electromagnetic system controller. The AC 220V voltage is stepped down by a series capacitor and then bridge-type rectified to supply power to the excitation coil. The travel switch K is connected in parallel with the capacitor and is connected to the iron core The linkage makes the capacitor C short-circuit to achieve high-voltage excitation and low-voltage maintenance. The disadvantages of the controller with this structure have been mentioned before, so I won't repeat them here.

[0021] refer to figure 2 , 3 , the universal contactor electromagnetic system controller of the present invention is applicable to both DC and AC control power supplies. When the control power supply is a DC power supply, the controller is directly connected to the DC power supply. When the control power supply is AC, it is converted into DC by the rectifier circuit and then added to the controller. The control power...

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Abstract

The present invention discloses one kind of controller for electromagnetic system of universal contactor. The present invention features the whole voltage excitation in switching on, the switching off of FET with an electronic timer before cutting off the whole voltage excitation loop after the iron core is closed and stabilized, and low DC voltage excitation to the electromagnet with a switching power supply; and turning off the FET in the aftercurrent loop with an electronic delayer in switching off for fast attenuation and off. The contactor with the said controller has the capacity of switching on and off short-circuit current similar to that of a breaker, and may be cooperated with weak electrical control circuit to realize remote automatic control.

Description

technical field [0001] The invention relates to a controller of an electromagnetic system of an AC contactor. The AC contactor of the controller of the electromagnetic system of the invention can quickly shut off the freewheeling circuit after the power is cut off, so that the separation speed of the iron core is much higher than that of the traditional contactor , so that it has the ability to break short-circuit current, so it is more specifically a controller of a general contactor electromagnetic system. Background technique [0002] The magnetic flux of the iron core changes positively and negatively during the connection process of the contactor using an AC electromagnet. When the magnetic flux passes through 0, the suction force is 0, so the closing force fluctuates. When breaking, due to the continuous flow of the short circuit ring, the core demagnetization time is long, resulting in breaking The delay time is long and the breakin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H47/02
Inventor 王有元
Owner ZHEJIANG CHINT ELECTRIC CO LTD
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