[introduction] relay of open flow solid state is a kind compositive the electronic switch device of the semiconductor switch that does not have contact and drive circuit. It controls dc route through signal of feebleminded bad news, realize the switch control of the electric current in circuit.

Fundamental definition

Relay of open flow solid state is a kind compositive the electronic switch device of the semiconductor switch that does not have contact and drive circuit. It controls dc route through signal of feebleminded bad news, realize the switch control of the electric current in circuit.

Working principle

Dominate circuit: The control circuit of relay of dc solid state inputs port and composition of circuit of a control by normally. Control voltage appropriately through inputting port to bring to bear on, control circuit brings to bear on parts of an apparatus of half-and-half conductor switch proper voltage, make its are in thereby guide connect or off-state.

Semiconductor switch parts of an apparatus: This is the crucial part of relay of dc solid state, use power MOSFET or power IGBT to wait for semiconductor device normally. When control circuit brought to bear on when proper voltage, the grid of semiconductor switch parts of an apparatus or base will by drive, form thereby guide all road, make electric current can have shed solid state relay.

Input: Relay of dc solid state has the input of low power comsumption normally, can come with the electric current of microamper level incentive control circuit. Input can be photoelectricity segregation parts of an apparatus, be like opto-coupler, it is OK will input smooth signal of voltage signal translate into, the means that keeps apart through light delivers control circuit.

Output circuit: The output circuit of relay of dc solid state is mixed by a laden port normally composition of parts of an apparatus of switch of a semiconductor. When semiconductor switch parts of an apparatus is in on-state, form between output circuit and load even all road, electric current can shed overload. Conversely, when semiconductor switch parts of an apparatus is in off-state, disconnect between output circuit and load, electric current cannot shed overload.

Advantage

Response rate is rapid: Can reach small second level.
Interference rejection sex is strong: Can resist the electromagnetism of certain level is disturbed.
Direct and compatible number controls a system: Convenient as compositive as digital system.
Service life is long: Compare traditional and mechanical relay, have longer service life.

Relay of open flow solid state circuit graph

If the in-house circuit of relay of open flow solid state and graphic symbol pursue 12, 15 are shown, control voltage carries an input by IN, through photoelectricity coupler will control signal coupling to come to be accused to carry, via switch of the drive after enlarge tubal VT guides. Solid state relay is outputted in carrying OUT to receive circuit be accusinged, output carries OUT to have, the cent of negative pole.

Circuit, and output uses canal of one-way brilliant brake or pipe of two-way brilliant brake partly, the glow diode that the control tension that uses an input makes photoelectricity coupler is in-house gives off light, the one-way brilliant brake that outputs end through in-house control circuit post-trigger is in charge of or canal of two-way brilliant brake guides, then drive is laden, if the appearance of electric equipment of dimension of partial solid state pursues 12, 14 are shown.

If the in-house circuit of relay of open flow solid state and graphic symbol pursue 12, 15 are shown, control voltage carries an input by IN, through photoelectricity coupler will control signal coupling to come to be accused to carry, via switch of the drive after enlarge tubal VT guides. Solid state relay is outputted in carrying OUT to receive circuit be accusinged, output carries OUT to have, the cent of negative pole.

If the in-house circuit that communicates relay of type solid state and graphic symbol pursue 12, 16 are shown, what differ with open flow is, switch component uses two-way brilliant brake to be in charge of VS, because this communicates relay of type solid state to output end,OUT is not had, the cent of negative pole, can control those who communicate loop to be connected.

Use an occasion

Automation device control character: Wait like control of industrial automation product line, robot, its are fast switch speed and the work efficiency that high accuracy controls ability to be able to improve automation system greatly and accuracy.

Inverter of smooth hot season controls: Can realize the sudden switch of dc electric current, be controlled thereby and stabilize communication to export voltage and electricity.

Domain of electric power electron: If communicate the circumstance such as compressor of electric machinery, electric welder, air, transducer, solid state relay has switch rate fast, life capability of long, interference rejection is strong wait for an advantage, can increase the work efficiency of equipment and stability effectively.

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