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Relay driving device

A driving device and relay technology, which is applied in relays, circuits, electrical components, etc., can solve the problems of high coil conduction loss, the inability to realize fast closing of contacts, and the inability to realize rapid power-on of relay coils at the same time, so as to achieve accelerated opening And quick release, reduce the effect of heat loss

Inactive Publication Date: 2012-10-03
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of the existing technology is that the coil of the relay cannot be quickly powered on at the same time, the contacts of the relay cannot be closed quickly, and the loss of coil conduction after the contacts are closed is very high

Method used

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  • Relay driving device
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Embodiment Construction

[0017] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0018] figure 1 It is a schematic diagram of a relay driving device provided by an embodiment of the present invention. Such as figure 1 As shown, the relay driving device provided by the embodiment of the present invention includes a DC power supply 101 , a closing unit 102 , a releasing unit 103 , and a coil 104 of the relay. The device also includes a first transistor (Q1), and the relay driving signal is input into the closing unit 101 through the gate of the first transistor (Q1). When the relay drive signal is an off signal, the DC power supply 101 and the first capacitor (C1) in the closing unit 102 and a charging resistor (R4) form a loop, whereby the first capacitor (C1) is charged; When the signal is a closing signal, the first capacitor (C1) in the closing unit 102 forms a series relationship with the DC ...

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PUM

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Abstract

The embodiment of the invention relates to a relay driving device. The device provides power with voltage higher than rated voltage at the closing moment of a relay through a closing unit to quickly power on a coil of the relay, and the voltage of the power is gradually decreased along with the power-on of the coil of the relay, so that the closing unit can drive the coil of the relay by adopting sustaining voltage after the coil of the relay is conducted; and the device provides a reverse path for the coil of the relay at the releasing and turning-off moment of the relay, so that the electric energy of the coil of the relay can be quickly released. Therefore, by the relay driving device, the coil of the relay can be quickly powered on, the electric energy of the coil of the relay can be quickly released, and the loss of the coil in a conduction process is reduced by adopting the low sustaining voltage after the conduction of the coil.

Description

technical field [0001] The invention relates to a driving device, in particular to a relay driving device. Background technique [0002] At the moment of excitation and demagnetization of the excitation coil of the relay, an instantaneous large current is required to make the magnetic field build up or exit, that is, to make the contacts of the relay close or release. The use of conventional driving voltages can easily lead to slow closing or release of the driver contacts, and seriously even affect the function of the circuit or the function of the electrical product. [0003] Under the existing technology, the drive circuit uses two-stage suppression circuit to realize the voltage suppression under different timings. Through the timing control, the discharge suppression of the first low voltage can be realized, and then the second high suppression voltage is realized. The rapid release of the residual electric energy of the coil of the relay achieves the function of quick...

Claims

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Application Information

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IPC IPC(8): H01H47/22
Inventor 李洪辉赵韦伟
Owner HUAWEI TECH CO LTD