CN213279611U - Solid-state relay control circuit - Google Patents
Solid-state relay control circuit Download PDFInfo
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- CN213279611U CN213279611U CN202022505518.4U CN202022505518U CN213279611U CN 213279611 U CN213279611 U CN 213279611U CN 202022505518 U CN202022505518 U CN 202022505518U CN 213279611 U CN213279611 U CN 213279611U
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Abstract
The utility model discloses a solid-state relay control circuit, which comprises an oscillation wave generating circuit and an energy transfer circuit; the oscillating wave generating circuit generates square wave-like waveforms with specific frequency and specific duty ratio, the specific waveforms output by the oscillating wave generating circuit are used as control signals of the energy transfer circuit, the energy transfer circuit is controlled to execute corresponding actions, the capacity of a primary coil of a transformer of the energy transfer circuit is transferred to a secondary coil, and the driving control of the solid-state relay output circuit is completed. The utility model discloses a mode that field effect transistor and triode combined mutually reduces the control circuit consumption, field effect transistor can drive for very little electric current of pressure control type device under the condition that driving voltage satisfies, the triode can accelerate the charge-discharge of electric capacity for current type drive device, utilize the respective characteristics of device can realize control circuit's reliable work, promote electric energy conversion efficiency, avoid unnecessary energy loss, thereby reduce control circuit's overall consumption, for the miniaturization of solid state relay provides the circuit basis.
Description
Technical Field
The utility model relates to a solid state relay technical field, concretely relates to solid state relay control circuit.
Background
With the development of aviation, aerospace, electronic and computer control technologies, common control voltage specifications of voltage-driven solid-state relays for current systems are 5V and 28V. The core circuit of the solid-state relay with the 28V specification is basically consistent with the core circuit of the solid-state relay with the 5V specification, but the core circuit of the solid-state relay with the 28V specification needs to be ensured to normally work in a voltage division mode, so that the power consumption consumed by a voltage division resistor is large, the conversion efficiency of a control circuit is low, and the control circuit generates heat seriously on a product, so that the chip and miniaturization processes of the solid-state relay with the 28V specification are restricted.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve is the great problem of current solid state relay's control circuit consumption, provides a solid state relay control circuit.
In order to solve the above problems, the utility model discloses a realize through following technical scheme:
a solid-state relay control circuit comprises an oscillation wave generating circuit and an energy transfer circuit; the positive input end and the negative input end of the oscillation wave generating circuit are connected with the threshold circuit; the control output end of the oscillation wave generating circuit is connected with the control input end of the energy transfer circuit; the positive output end of the oscillatory wave generating circuit is connected with the positive input end of the energy transfer circuit, and the negative output end of the oscillatory wave generating circuit is connected with the negative input end of the energy transfer circuit; the output positive end and the output negative end of the energy transfer circuit are connected with the post-stage general circuit of the solid relay; the oscillating wave generating circuit generates square wave-like waveforms with specific frequency and preset duty ratio, the output preset waveforms are used as control signals of the energy transfer circuit, the energy transfer circuit is controlled to execute corresponding actions, the capacity of a primary coil of a transformer of the energy transfer circuit is transferred to a secondary coil, and the driving control of the solid-state relay output circuit is completed.
In the scheme, the oscillation wave generating circuit consists of resistors R1-R7, diodes V1-V2, a triode Q1, field effect transistors Q2-Q4 and a capacitor C1; one end of the resistor R1 is connected with the anode of the diode V1 and the base electrode of the triode Q1; the other end of the resistor R1 is connected with the drain electrode of the field effect transistor Q4 and one end of the resistor R7 to form a control output end of the oscillation wave generating circuit; one end of the resistor R2 is connected with the collector of the triode Q1; the other end of the resistor R2 is connected with the anode of the diode V2, one end of the capacitor C1, one end of the resistor R3, one end of the resistor R6 and one end of the resistor R7 to form an input positive end and an output positive end of the oscillation wave generating circuit; the other end of the resistor R3 is connected with the sources of field effect transistors Q2 and Q3; one end of the resistor R4 is connected with the drain electrode of the field effect transistor Q2, one end of the resistor R5 and the source electrode of the field effect transistor Q4 to form an input negative end and an output negative end of the oscillation wave generating circuit; the other end of the resistor R4 is connected with the drain electrode of the field effect transistor Q3 and the grid electrode of the field effect transistor Q4; the other end of the resistor R5 is connected with the other end of the resistor R6 and the grid of the field effect transistor Q3; the cathode of the diode V1 is connected with the emitter of the triode Q1, the cathode of the diode V2, the other end of the capacitor C1 and the gate of the field effect transistor Q2.
In the scheme, the energy transfer circuit consists of resistors R8-R13, a capacitor C2, diodes V3-V4, triodes Q5-Q6, a field-effect tube Q7 and a transformer T; one end of the capacitor C2 forms a control input end of the energy transfer circuit; the other end of the capacitor C2 is connected with one ends of the resistors R8 and R9; the other end of the capacitor R8 is connected with the emitter of the triode Q5 and one end of the primary coil of the transformer T to form the input positive end of the energy transfer circuit; the other end of the resistor R9 is connected with the base electrode of the triode Q5; one end of the resistor R10 is connected with an emitter of the triode Q5, and the other end of the resistor R10 is connected with the anode of the diode V3, the base of the triode Q6 and one end of the resistor R11; the other end of the resistor R11 is connected with one end of the resistor R12, the anode of the diode V4 and one end of the resistor R13 to form the input negative end of the energy transfer circuit; an emitter of the triode Q6 is connected with a cathode of the diode V3, a cathode of the diode V4 and a grid of the field effect transistor Q7; the drain electrode of the field effect transistor Q7 is connected with the other end of the primary coil of the transformer T and the other end of the resistor R13; two ends of the secondary coil of the transformer T form an output positive end and an output negative end of the energy transfer circuit respectively.
Compared with the prior art, the utility model has the characteristics of as follows:
1. the solid-state relay control circuit integrates the characteristics that the field effect transistor is a voltage control type and the triode is a current drive type device, and achieves the purpose of energy conservation.
2. The solid-state relay control circuit has the advantages that the design concept of the switching power supply is used for reference, so that the energy conversion efficiency is improved, unnecessary loss is reduced, and the solid-state relay control circuit is particularly suitable for a system with a 28V control power supply.
3. The solid-state relay control circuit reduces unnecessary loss, reduces the temperature rise of the control circuit, and can reduce the volume of a solid-state relay product by carrying out integrated design on the solid-state relay control circuit.
Drawings
Fig. 1 is a schematic diagram of a solid state relay control circuit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the following specific examples.
Referring to fig. 1, a solid state relay control circuit includes an oscillation wave generating circuit and an energy transfer circuit. The oscillating wave generating circuit generates square wave-like waveforms with specific frequency and specific duty ratio, the specific waveforms output by the oscillating wave generating circuit are used as control signals of the energy transfer circuit, the energy transfer circuit is controlled to execute corresponding actions, the capacity of the primary coil of the transformer is transferred to the secondary coil, and the driving control of the solid-state relay output circuit is completed.
The oscillatory wave generating circuit consists of resistors R1-R7, diodes V1-V2, a triode Q1, field-effect tubes Q2-Q4 and a capacitor C1; one end of the resistor R1 is connected with the anode of the diode V1 and the base electrode of the triode Q1; the other end of the resistor R1 is connected with the drain electrode of the field effect transistor Q4 and one end of the resistor R7 to form a control output end of the oscillation wave generating circuit; one end of the resistor R2 is connected with the collector of the triode Q1; the other end of the resistor R2 is connected with the anode of the diode V2, one end of the capacitor C1, one end of the resistor R3, one end of the resistor R6 and one end of the resistor R7 to form an input positive end and an output positive end of the oscillation wave generating circuit; the other end of the resistor R3 is connected with the sources of field effect transistors Q2 and Q3; one end of the resistor R4 is connected with the drain electrode of the field effect transistor Q2, one end of the resistor R5 and the source electrode of the field effect transistor Q4 to form an input negative end and an output negative end of the oscillation wave generating circuit; the other end of the resistor R4 is connected with the drain electrode of the field effect transistor Q3 and the grid electrode of the field effect transistor Q4; the other end of the resistor R5 is connected with the other end of the resistor R6 and the grid of the field effect transistor Q3; the cathode of the diode V1 is connected with the emitter of the triode Q1, the cathode of the diode V2, the other end of the capacitor C1 and the gate of the field effect transistor Q2.
The energy transfer circuit consists of resistors R8-R13, a capacitor C2, diodes V3-V4, triodes Q5-Q6, a field effect transistor Q7 and a transformer T; one end of the capacitor C2 forms a control input end of the energy transfer circuit; the other end of the capacitor C2 is connected with one ends of the resistors R8 and R9; the other end of the capacitor R8 is connected with the emitter of the triode Q5 and one end of the primary coil of the transformer T to form the input positive end of the energy transfer circuit; the other end of the resistor R9 is connected with the base electrode of the triode Q5; one end of the resistor R10 is connected with an emitter of the triode Q5, and the other end of the resistor R10 is connected with the anode of the diode V3, the base of the triode Q6 and one end of the resistor R11; the other end of the resistor R11 is connected with one end of the resistor R12, the anode of the diode V4 and one end of the resistor R13 to form the input negative end of the energy transfer circuit; an emitter of the triode Q6 is connected with a cathode of the diode V3, a cathode of the diode V4 and a grid of the field effect transistor Q7; the drain electrode of the field effect transistor Q7 is connected with the other end of the primary coil of the transformer T and the other end of the resistor R13; two ends of the secondary coil of the transformer T form an output positive end and an output negative end of the energy transfer circuit respectively.
The positive input end and the negative input end of the oscillation wave generating circuit are connected with the threshold circuit; the control output end of the oscillation wave generating circuit is connected with the control input end of the energy transfer circuit; the positive output end of the oscillatory wave generating circuit is connected with the positive input end of the energy transfer circuit, and the negative output end of the oscillatory wave generating circuit is connected with the negative input end of the energy transfer circuit; and the output positive end and the output negative end of the energy transfer circuit are connected with the post-stage general circuit of the solid relay. The resistors R1-R7 are proper in value, so that the working circuit of the oscillating wave generating circuit can be reduced to below 1mA, the ratio of the resistors R5 to R6 is adjusted, the amplitude, the frequency and the duty ratio of an oscillating waveform can be adjusted, the frequency and the duty ratio of the oscillating wave can be adjusted by the adjusting resistor R1, the grid voltage of the field effect transistor Q2 can be limited by the diode V2 to be not more than the grid breakdown voltage of the Q2, and the triode Q1 and the peripheral circuits thereof provide a discharging loop for the junction capacitors of the capacitor C1 and the field effect transistor Q2. The power of the primary coil is transferred to the secondary coil through the transformer to drive the output circuit of the solid-state relay. Under the control of the oscillating wave generating circuit, the field effect transistor Q7 is turned on and off continuously, a loop composed of the transformer T, the field effect transistor Q7 and the resistor R13 is turned on and off according to the action frequency of the field effect transistor Q7, at the moment, a primary coil of the transformer T generates an alternating magnetic field, a secondary coil of the transformer T generates electric energy through the alternating magnetic field to drive a post-stage general circuit of the solid-state relay, and the circuit can work normally under the current of about 2 mA.
The utility model discloses a mode that field effect transistor and triode combined mutually reduces the control circuit consumption, field effect transistor can drive for very little electric current of pressure control type device under the condition that driving voltage satisfies, the triode can accelerate the charge-discharge of electric capacity for current type drive device, utilize the respective characteristics of device can realize control circuit's reliable work, promote electric energy conversion efficiency, avoid unnecessary energy loss, thereby reduce control circuit's overall consumption, for 28V specification solid state relay miniaturization provides the circuit basis.
It should be noted that, although the above-mentioned embodiments of the present invention are illustrative, the present invention is not limited thereto, and therefore, the present invention is not limited to the above-mentioned embodiments. Other embodiments, which can be made by those skilled in the art in light of the teachings of the present invention, are considered to be within the scope of the present invention without departing from the principles thereof.
Claims (3)
1. A solid-state relay control circuit is characterized by comprising an oscillation wave generating circuit and an energy transfer circuit;
the positive input end and the negative input end of the oscillation wave generating circuit are connected with the threshold circuit; the control output end of the oscillation wave generating circuit is connected with the control input end of the energy transfer circuit; the positive output end of the oscillatory wave generating circuit is connected with the positive input end of the energy transfer circuit, and the negative output end of the oscillatory wave generating circuit is connected with the negative input end of the energy transfer circuit; and the output positive end and the output negative end of the energy transfer circuit are connected with the post-stage general circuit of the solid relay.
2. The solid-state relay control circuit as claimed in claim 1, wherein the oscillatory wave generating circuit is composed of resistors R1-R7, diodes V1-V2, a triode Q1, field effect transistors Q2-Q4 and a capacitor C1; one end of the resistor R1 is connected with the anode of the diode V1 and the base electrode of the triode Q1; the other end of the resistor R1 is connected with the drain electrode of the field effect transistor Q4 and one end of the resistor R7 to form a control output end of the oscillation wave generating circuit; one end of the resistor R2 is connected with the collector of the triode Q1; the other end of the resistor R2 is connected with the anode of the diode V2, one end of the capacitor C1, one end of the resistor R3, one end of the resistor R6 and one end of the resistor R7 to form an input positive end and an output positive end of the oscillation wave generating circuit; the other end of the resistor R3 is connected with the sources of field effect transistors Q2 and Q3; one end of the resistor R4 is connected with the drain electrode of the field effect transistor Q2, one end of the resistor R5 and the source electrode of the field effect transistor Q4 to form an input negative end and an output negative end of the oscillation wave generating circuit; the other end of the resistor R4 is connected with the drain electrode of the field effect transistor Q3 and the grid electrode of the field effect transistor Q4; the other end of the resistor R5 is connected with the other end of the resistor R6 and the grid of the field effect transistor Q3; the cathode of the diode V1 is connected with the emitter of the triode Q1, the cathode of the diode V2, the other end of the capacitor C1 and the gate of the field effect transistor Q2.
3. The solid-state relay control circuit as claimed in claim 1, wherein the energy transfer circuit is composed of resistors R8-R13, a capacitor C2, diodes V3-V4, triodes Q5-Q6, a field effect transistor Q7 and a transformer T; one end of the capacitor C2 forms a control input end of the energy transfer circuit; the other end of the capacitor C2 is connected with one ends of the resistors R8 and R9; the other end of the capacitor R8 is connected with the emitter of the triode Q5 and one end of the primary coil of the transformer T to form the input positive end of the energy transfer circuit; the other end of the resistor R9 is connected with the base electrode of the triode Q5; one end of the resistor R10 is connected with an emitter of the triode Q5, and the other end of the resistor R10 is connected with the anode of the diode V3, the base of the triode Q6 and one end of the resistor R11; the other end of the resistor R11 is connected with one end of the resistor R12, the anode of the diode V4 and one end of the resistor R13 to form the input negative end of the energy transfer circuit; an emitter of the triode Q6 is connected with a cathode of the diode V3, a cathode of the diode V4 and a grid of the field effect transistor Q7; the drain electrode of the field effect transistor Q7 is connected with the other end of the primary coil of the transformer T and the other end of the resistor R13; two ends of the secondary coil of the transformer T form an output positive end and an output negative end of the energy transfer circuit respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022505518.4U CN213279611U (en) | 2020-11-03 | 2020-11-03 | Solid-state relay control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022505518.4U CN213279611U (en) | 2020-11-03 | 2020-11-03 | Solid-state relay control circuit |
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| Publication Number | Publication Date |
|---|---|
| CN213279611U true CN213279611U (en) | 2021-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022505518.4U Active CN213279611U (en) | 2020-11-03 | 2020-11-03 | Solid-state relay control circuit |
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|---|---|
| CN (1) | CN213279611U (en) |
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2020
- 2020-11-03 CN CN202022505518.4U patent/CN213279611U/en active Active
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