SU706932A2 - Dc semiconductor relay - Google Patents

Description

(54) Semiconductor DC Relay

The invention relates to electrical engineering and can be used in power supply systems.

According to the main author. St. No. 600732 are known DC semiconductor relays, containing a 1-stage two-stage upper and lower limit amplifier on transistors with voltage dividers at the inputs, with the cascades interconnected through a threshold element and connected to a common reference voltage source, as well as an actuator organ.

The disadvantage of these relays is the large own energy consumption when adjusting the voltage over a wide range.

The aim of the invention is to reduce power consumption.

This is achieved by the fact that in a relay, with a two-stage upper and lower limit amplifier with transistors with voltage dividers at the inputs, the stages are interconnected through a threshold element and connected to a common source of reference voltage, as well as

executive organ, transistor of opposite type of conductivity, the base of which through the first resistor is connected to the collector of the transistor of the upper limit amplifier and through the second resistor to one of the power supply buses, while the collector of the additional transistor is connected to the executive organ in parallel with which the first diode is connected, and through a resistor - with a threshold element, and

the emitter is connected via the second diode to the mentioned power supply bus, three transistor current stabilizers are introduced: the first is connected to the collector circuit of the first cascade transistor, while the base of its transistor is connected to the emitter of the reverse conduction transistor, and the second between the power source emitter , the base of its transistor is connected to the emitter of the transistor of the first cascade, and the reference resistor introduced into the device is included in the emitter circuit, and the third is connected to the collector circuit of the reverse transistor conduction, the base of its transistor is connected

cut entered in the device; §1Gam - to the collector of the reverse conduction transistor and through the diode - to the aforementioned busbars: the second reference resistor introduced into the device.

The drawing shows a schematic diagram of the proposed relay.

The relay is designed as a two-stage amplifier with transistors 1 and 2. Both stages have a common source of reference voltage — a reference diode 3. At the output of transistor 1 of the first stage, voltage divider 4 is turned on, and at the input of transistor 2 there is an additional voltage divider 5. Between transistors I and 2 turn on Zener diode 6. The output of transistor 2 of the second stage is connected via resistor 7 to the power supply line 1.

The emitter of the reverse conduction transistor 8 is connected via the diode 9 to the same bus, and its collector is connected to the executive element 10. Resistor II of the positive feedback is connected between the input of the second transistor 2 and the executive element. In addition, the relay contains three transistor current regulators and iziscors 12, 13, 14, two reference resistors 15 and 16, resistor 17 and diode 18.

The relay works as follows.

As the voltage drops below the allowable limit, transistor 1 closes, the negative potential of its collector increases. At the same time, the zener diode 6 opens, the base current of the transistor 2 is injected, the transistor 2 opens. The collector current of transistor 2, flowed through a resistor 7, lms out 1sh 11 shshnie zapy) p11 "1 fr shge (johtora 8, created by diode 9. Thanks to positive feedback through resistor 11, transistor 8 jumps from aaKpbitoftoyo4pffoftoyo10pfto is saved in a mode, and the transistor 8 jumps from the aypcfbitof, and a10pf will be used by the resistor 11) the resistor 16 and the elements 17 and 18, Disconnected according to the current regulator circuit, draw the current through the transistor 8 to

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the value given by the reference resistor 16.

An increase in the voltage U, above the pitch of the limit, opens the transistor 2, when the voltage across the divider 5 exceeds the voltage of the reference diode 3. Then the process proceeds as described.

The collector current of transistor 1 is limited by a current stabilizer formed by

transistor 12, and the current of the diode transistor 13 ya level determined by the reference resistor 15.

Thus, with an increase in the monitored voltage, the consumption of the relay does not increase, which ensures a reduction in power consumption compared with the known device.

Claims (1)

Invention Formula DC semiconductor relay by author St. No. 600732, characterized in that, in order to reduce the consumption J power, it introduced three transistor current stabilizers: the first is in the collector circuit of the transistor of the first stage, while the base of its transistor is connected to the emitter of the reverse conduction transistor, the second between the emitter of the transistor  reverse conduction and power supply bus, the base of its transistor is connected to the emitter of the transistor of the first stage, and the reference resistor introduced into the device is included in the emitter circuit, and the third 5 into the collector circuit of the reverse conduction transistor, the base of its transistor is connected via the resistor inserted into the device to the collector of the reverse transistor transistor and through the diode to the specified power source, and the second reference voltage inserted into the device is connected to the emitter circuit. i2 (