CN2228260Y

CN2228260Y - Power electronic relay

Info

Publication number: CN2228260Y
Application number: CN 95206554
Authority: CN
Inventors: 徐秉雁; 陈建设; 孙晖
Original assignee: 徐秉雁
Priority date: 1995-03-29
Filing date: 1995-03-29
Publication date: 1996-05-29
Anticipated expiration: 2005-03-29

Abstract

The utility model relates to a power electronic relay. The utility model is composed of a power electronic element with a radiator enveloped in a casing, an electromechanical relay, a control and trigger circuit and an over current protection circuit. The input control signal is led into the power electronic element and the electromechanical relay through the control and trigger circuit, the sampling current signal output by the power electronic element is transferred back to the control and trigger circuit in the over current protection circuit, the reference voltage signal and the input control signal in the circuit are compared, and the power electronic element and/or the electromechanical relay are/is controlled to open and close.

Description

The power electronic relay

The utility model belongs to technical field of electronic devices, relates to a kind of relay product that is used for electric automatization control.

Relay is the device for switching that is used to realize controlling and controlling with light current forceful electric power in the industrial automation system.Conventional electromechanical relay is mainly used electromagnetic induction principle, realizes control action by electromagnetic force adhesive contact switch, and its advantage is to have many group normally-open normally-closes contact, easy to install and carry out controlling Design etc. easily; But shortcoming is a contact switch is mechanically actuated operation, the unsuitable quick break-make of high-frequency, the high-power break-make life-span is short, driving power is big, noise is high and can not directly be driven by computer etc., manufacturing for specialities, as must be under especially big electric current and high pressure the product of break-make, its manufacture difficulty and cost are all than higher.This area can realize aspect the power control that electronically controlled relay surely belongs to solid-state relay (Solid State Relay at present, be called for short SSR), it will trigger element and the controllable silicon envelope is a solid, have that volume is little, power is big and some switch characteristics of silicon controlled, but its is simultaneously also corresponding to exist does not have normally-closed contact, control signal is special and also will join defective such as radiator during high-power use in addition, because the existence of above-mentioned defective, thereby the present direct replacement that also can't realize solid-state relay and electromechanical relay.

The purpose of this utility model provides and a kind ofly can auxiliaryly often open with having of directly replacing of conventional electromechanical relay, normally-closed contact and the power electronic relay that can carry out overcurrent protection to power device, in order to overcome the existing defective of existing conventional electromechanical relay and solid-state relay.

Technical solution of the present utility model is that power electronic element and radiator, control triggering electric circuit, the electromechanical relay that will comprise controllable silicon or solid-state relay or power electronics modules give integrated setting; between control triggering electric circuit and controllable silicon, be provided with current foldback circuit; this circuit will be input to control triggering electric circuit by the sample rate current feedback that power electronic element output obtains, and then realize the open and close of power controlling electronic component and/or electromechanical relay.

Below in conjunction with accompanying drawing the utility model content is described further.

Fig. 1 is a fundamental diagram of the present utility model.

Fig. 2 is the circuit diagram of the specific embodiment of Fig. 1.

As shown in Figure 1; power electronic relay described in the utility model is made of the integrated power electronic element that contains radiator 3 (comprising controllable silicon, power electronics modules or solid-state relay), electromechanical relay 4, control triggering electric circuit 1 and the current foldback circuit 2 that is packaged in the housing 5; introduce control signal by the input wires terminal on the housing 5, the Be Controlled circuit is connected with output wiring terminal.In the work; input control signal feeds power electronic element 3 and the electromechanical relay 4 that contains radiator through control triggering electric circuit 1; current foldback circuit 2 is obtained the sample rate current signal by power electronic element 3 outputs and is fed back to control triggering electric circuit 1; through with circuit 1 in after reference voltage signal and input control signal compare, and then the opening and closing of power controlling electronic component 3 and electromechanical relay 4.The power electronic element that contains radiator 3 described in the literary composition comprises controllable silicon, power electronics modules or the solid-state relay that combines with radiator.

The embodiment that is used to realize above-mentioned design can have multiple, and the circuit form that Fig. 2 provides relates to a kind of specific embodiment wherein.In this embodiment, control triggering electric circuit 1 is that the double operational circuit of KA5532 and silicon control zero-cross circuits for triggering that model is KJ008 constitute by model, 2 of the output of KA5532 circuit and KJ008 circuit, 7 pin UNICOMs, two outputs (5 of KJ008,8 pin) be applied to simultaneously on the control end of the controllable silicon 32 that contains radiator 31 and electromechanical relay J, it is the aluminium section bar radiator of YCW620 that radiator 31 shown in Fig. 2 is selected model for use, controllable silicon adopts the KS100/120 bidirectional triode thyristor, add heat-conducting silicone grease in the making and bond them together with fastening method between the two, the model of relay J is JP-80; Current foldback circuit comprises the current transformer CT that a model is CT100/5.The dynamic duty process of this embodiment is such: KJ008 is a kind of homemade integrated circuit that is exclusively used in the silicon control zero-cross triggering, current signal (sampled signal) that input control signal and controllable silicon 32 pass through and circuit reference voltage are imported the KJ008 circuit in the back through the double operational circuit differential ratio of KA5532, synchronizing voltage by with circuit in reference voltage carried out zero balancing after, converge with the differential comparator of input control signal in circuit, when input voltage during less than reference voltage, KJ008 sends trigger impulse when the synchro source zero passage, make controllable silicon 32 supply voltage be zero or electric current carry out switch when being zero.Number in the figure 5 is a housing; 6 are load.J ₁And J ₂Switch contact for electromechanical relay J.

Compared with prior art, the utlity model has following advantage:

One, conventional electromechanical relay, power electronic element, radiator, control triggering electric circuit etc. are given integrated design, make choice increase, the compact conformation of device and material, the standardized designs that helps device can be brought great convenience to the user.

Two, switching speed is fast, frequency is high, the life-span is long, noiseless, no-spark, thereby controls effectively, has improved the Equipment Control level, and can use in moisture resistance, corrosion-resistant, explosion-proof, fireproof special occasions.

Three, can with directly logotype such as computer, intelligence instrument, and then promote the application of modernized automatic control technology.

Four, properties of product are reliable and stable, and then also improved the stable and reliability of equipment, save and reduced replacing and maintenance cost.

Five, because the utility model has been realized the direct replacement with conventional electromechanical relay, both improved the class of relay product, on control method, still can adopt the method for original electromechanical relay again, so just make things convenient for renovating of product, thereby had remarkable economic efficiency and social benefit.

Claims

1; a kind of power electronic relay that is used for electrical control; it is characterized in that described power electronic relay is by the integrated power electronic element that contains radiator (3) that is packaged in the housing (5); electromechanical relay (4); control triggering electric circuit (1) and current foldback circuit (2) constitute; input control signal feeds power electronic element (3) and the electromechanical relay (4) that contains radiator through control triggering electric circuit (1); current foldback circuit (2) is obtained the sample rate current signal by power electronic element (3) output and is fed back to control triggering electric circuit (1); through with circuit (1) in after reference voltage signal and input control signal compare, and then the keying of power controlling electronic component (3) and/or electromechanical relay (4).

2, power electronic relay as claimed in claim 1 is characterized in that the said power electronic element (3) that contains radiator comprises controllable silicon, power electronics modules or the solid-state relay that combines with radiator.