Control circuit of AC contactor

A technology for AC contactors and control circuits, applied to circuits, relays, electrical components, etc., can solve the problems of increasing components, increasing costs, and failure rates, and achieves the effects of low circuit cost, convenient power source, and simple structure

Inactive Publication Date: 2017-07-07
CHENGDU RAJA NEW ENERGY AUTOMOTIVE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of driving the AC contactor by the low-voltage-high-voltage conversion circuit adds an additional part of the voltage conversion circuit, and the components are greatly increased, which has the risk of increasing the cost and failure rate

Method used

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  • Control circuit of AC contactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1: figure 1 The structural diagram of the AC contactor control circuit provided for the embodiment of the present invention, such as figure 1 As shown, the control element includes a field effect transistor 7, a relay (1) 8 and a relay (2) 9, the AC power supply includes an AC power supply (1) 4 and an AC power supply (2) 5, and the AC contactor 1 is provided with an auxiliary contact ( A) 10 and auxiliary contact (B) 11.

[0042] When the AC contactor 1 pull-in control signal is input from the control signal input port 2, the pull-in signal and GND are at a high level, the field effect transistor 7 is turned on, and the relay (1) 8 and relay (2) 9 are pulled in. Select the AC power supply for the circuit, the AC power supply (1) 4 and the AC power supply (2) 5 are formed by the auxiliary contact (A) 10, the diode (1) 13, the relay (1) 8, the current limiting resistor 12 and the AC contactor 1 path. The AC power source (1) 4 and the AC power source (2) 5 char...

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PUM

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Abstract

The invention discloses a control circuit of an AC contactor. The control circuit comprises power supplies, the AC contactor, a control signal input port, a control element and an energy storage element; the power supplies include an AC power supply and a DC auxiliary power supply; the AC contactor is provided with auxiliary contact points connected with the power supplies; the control signal input port inputs signals for controlling opening/closing of the AC contactor; the control element controls connection/disconnection of the AC contactor with/from a loop of the power supplies; and the energy storage element provides a pull-in voltage for the AC contactor. According to the circuit structure, the auxiliary contact points of the AC contact are combined with the control element, no complex driving circuit is included, high-voltage power is not needed to maintain closing of the AC contactor, and the circuit reliability is high; and electric energy is convenient to get, the AC power supply and the DC auxiliary power supply are used in the circuit, the structure is simple, and the circuit cost is low.

Description

technical field [0001] The invention relates to a control circuit, in particular to a control circuit of an AC contactor. Background technique [0002] Equipment such as inverters, frequency converters, chargers, charging cabinets, and charging piles belong to the field of electric energy conversion, all of which involve the use of alternating current, and there are both alternating current and low-voltage direct current auxiliary control power in the circuit. AC contactors are commonly used in the main circuits of these devices to make and break circuits. It can be seen that it is very important to the whole system to control the on-off of the AC contactor conveniently and reliably. At present, the methods for controlling the on-off of the AC contactor include 1. directly using the AC to control the AC contactor, and 2. a method of driving the AC contactor with a low-voltage-high voltage conversion circuit. [0003] 1. Directly use the AC to control the AC contactor, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H47/04
CPCH01H47/043
Inventor 徐浩贾雷王晓文宋波
Owner CHENGDU RAJA NEW ENERGY AUTOMOTIVE TECH CO LTD
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