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Controller for electromagnetic system of universal contactor

An electromagnetic system and controller technology, applied to circuits, relays, electrical components, etc., can solve problems such as low connection capacity, unreliable pull-in, large vibration of contacts and cores, etc., to achieve long electrical life and shorten arcing the effect of time

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

Experimental program
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Embodiment Construction

[0016] 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.

[0017] refer to figure 2 , 3 , the universal contactor electromagnetic system controller of the present invention, the AC control power supply is firstly supplied to the controller after bridge rectification composed of D1, D2, D3, and D4, and the DC voltage is applied to the excitation coil through the full voltage of the diode D5 and the field effect transistor Q3 On L1, the full-voltage excitation circuit continues ...

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Abstract

The present invention discloses one kind of controller for electromagnetic system of universal contactor. The present invention features the regulation of exciting winding voltage via controlling the duty ratio of power supply in switching on, maintaining the core closed state with the aftercurrent loop comprising the exciting winding and one FET, the shut-off of the timer controlled after the operation of the core and the end of vibration for smooth switching on, and turning off the FET with a delayer for fast attenuation of the aftercurrent in switching 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 breaking m...

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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