CN214624883U - Relay drive circuit with wide-voltage input and double-voltage output - Google Patents
Relay drive circuit with wide-voltage input and double-voltage output Download PDFInfo
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- CN214624883U CN214624883U CN202121038772.6U CN202121038772U CN214624883U CN 214624883 U CN214624883 U CN 214624883U CN 202121038772 U CN202121038772 U CN 202121038772U CN 214624883 U CN214624883 U CN 214624883U
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- 230000000087 stabilizing effect Effects 0.000 abstract description 6
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Abstract
The utility model discloses a relay drive circuit of two pressure outputs of wide pressure input, including BUCK circuit major loop, drive circuit and voltage feedback loop, drive circuit and BUCK circuit major loop are connected, BUCK circuit major loop is connected with voltage feedback loop, voltage feedback loop still is connected with drive circuit and is used for adjusting drive circuit's output voltage, and voltage feedback loop includes zener diode Z1, zener diode Z2, resistance R11, triode Q2, resistance R4, triode Q5, resistance R6 and resistance R9. The utility model can reduce one path of power supply, when the contactor with resistance characteristic is used, after the contactor is conducted, the triode Q5 is driven to be conducted through the control signal, and then the triode Q2 is conducted, and the voltage stabilizing diode Z1 is bypassed to achieve the purpose of low-voltage output and power consumption reduction; when the contactor with the built-in power supply is used, the master control does not give an enable signal, and the voltage of +12V is output at the moment to ensure that the contactor works normally.
Description
Technical Field
The utility model relates to a power technical field, more specifically say, in particular to relay drive circuit of two pressure outputs of wide pressure input.
Background
The application of the relay and the contactor in the power supply industry is very wide, the driving winding of the relay is mostly of a resistance type, and the contactor is also provided with a built-in power supply module. For a resistor type contactor, the higher the driving voltage is, the larger the power consumption is, and the existing common technology needs to generate two power supplies through one flyback circuit: typically a +12V supply for turn-on and a +5V supply for sustain. The wiring diagram is shown in fig. 1, which can reduce power consumption for resistive driving windings, but has two disadvantages: 1. the need for a larger capacitor increases cost; 2. for the contactor with a built-in power supply, the circuit cannot reduce power consumption, the circuit has the possibility that the contactor cannot be driven due to the requirement of the built-in power supply contactor on starting current, and meanwhile, the relay can be disconnected due to the fact that the maintaining voltage is too low, and the circuit cannot be normally used. Therefore, it is necessary to develop a relay driving circuit with wide voltage input and dual voltage output.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a relay drive circuit of two pressure outputs of wide pressure input to overcome the defect that prior art exists.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a relay driving circuit with wide-voltage input and double-voltage output comprises a BUCK circuit main loop, a driving loop and a voltage feedback loop, wherein the driving loop is connected with the BUCK circuit main loop, the BUCK circuit main loop is connected with the voltage feedback loop, the voltage feedback loop is further connected with the driving loop and used for adjusting output voltage of the driving loop, the voltage feedback loop comprises a Zener diode Z1, a Zener diode Z2, a resistor R11, a triode Q2, a resistor R4, a triode Q5, a resistor R6 and a resistor R9, a cathode of the Zener diode Z1 is connected with an emitter and a driving loop of a triode Q2, an anode of the Zener diode Z1 is connected with a collector of a triode Q2 and a cathode of the Zener diode Z2, a base of a triode Q2 is connected with a collector of a triode Q5 through the resistor R4, an emitter of the triode Q5 is grounded, and a base of the triode Q5 is connected with a resistor R6, The resistor R9 is connected, the other end of the resistor R9 is grounded, one end of the resistor R11 is connected with the anode of the voltage stabilizing diode Z2, and the other end of the resistor R11 is connected with a main loop of the BUCK circuit.
Further, the driving circuit comprises a resistor R2, a resistor R3, a resistor R5, a capacitor C3, a resistor R8, a triode Q4 and a triode Q6, wherein a base of the triode Q4 is connected with a resistor R5 and a collector of a triode Q6, an emitter of the triode Q4 is grounded, a collector of the triode Q4 is connected with a resistor R3 and a capacitor C3, the other end of the capacitor C3 is connected with a base of the triode Q6 and a resistor R11, a base of the triode Q6 is grounded through a resistor R8, a resistor R3 is further connected with a resistor R2, and the resistor R2 and the resistor R3 are both connected with a BUCK circuit main circuit.
Further, the main loop of the BUCK circuit comprises a triode Q1, an inductor L1 and a diode D3, a resistor R2 is connected between an emitter and a base of the triode Q1, the base of the triode Q1 is further connected with a resistor R3, a collector of the triode Q1 is connected with a cathode of the diode D3 and an inductor L1, the inductor L1 is further connected with an emitter of the triode Q2, and an anode of the diode D3 is grounded.
Compared with the prior art, the utility model has the advantages of: the utility model can reduce one path of power supply, when the contactor with resistance characteristic is used, after the contactor is conducted, the triode Q5 is driven to be conducted through the control signal, and then the triode Q2 is conducted, and the voltage stabilizing diode Z1 is bypassed to achieve the purpose of low-voltage output and power consumption reduction; when the contactor with the built-in power supply is used, the master control does not give an enable signal, and the voltage of +12V is output at the moment to ensure that the contactor works normally. The circuit can perfectly solve the defects of the existing scheme and can obtain better practical effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a circuit diagram of the prior art.
Fig. 2 is a circuit diagram of the relay driving circuit with wide voltage input and dual voltage output according to the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention can be more clearly and clearly defined.
Referring to fig. 2, the utility model discloses a relay drive circuit of two pressure outputs of wide pressure input, including BUCK circuit major loop, drive circuit and voltage feedback loop, drive circuit and BUCK circuit major loop are connected, BUCK circuit major loop is connected with voltage feedback loop, voltage feedback loop still is connected with drive circuit and is used for adjusting the output voltage of drive circuit, voltage feedback loop includes zener diode Z1, zener diode Z2, resistance R11, triode Q2, resistance R4, triode Q5, resistance R6 and resistance R9, zener diode Z1's negative pole and triode Q2's projecting pole, drive circuit are connected, zener diode Z1's positive pole and triode Q2's collecting electrode, zener diode Z2's negative pole is connected, triode Q2's base passes through resistance R4 and triode Q5's collecting electrode and is connected, triode Q5's projecting pole ground connection, triode Q5's base and resistance R6, The resistor R9 is connected, the other end of the resistor R9 is grounded, one end of the resistor R11 is connected with the anode of the voltage stabilizing diode Z2, and the other end of the resistor R11 is connected with a main loop of the BUCK circuit.
In this embodiment, the driving circuit includes a resistor R2, a resistor R3, a resistor R5, a capacitor C3, a resistor R8, a transistor Q4, and a transistor Q6, a base of the transistor Q4 is connected to a collector of the resistor R5 and a collector of the transistor Q6, an emitter of the transistor Q4 is grounded, a collector of the transistor Q4 is connected to the resistor R3 and the capacitor C3, another end of the capacitor C3 is connected to a base of the transistor Q6 and the resistor R11, the base of the transistor Q6 is also grounded through a resistor R8, the resistor R3 is also connected to the resistor R2, and the resistor R2 and the resistor R3 are both connected to the BUCK circuit main circuit.
In this embodiment, the BUCK circuit main loop includes a triode Q1, an inductor L1, and a diode D3, a resistor R2 is connected between an emitter and a base of the triode Q1, a base of the triode Q1 is further connected with a resistor R3, a collector of the triode Q1 is connected with a cathode of the diode D3 and an inductor L1, the inductor L1 is further connected with an emitter of the triode Q2, and an anode of the diode D3 is grounded.
The utility model discloses a theory of operation does: when the circuit is in an initial state, the triode Q4 is driven to be conducted through the resistor R5, the triode Q1 is conducted, the inductor L1 charges, the output voltage is increased, when the output voltage is larger than the sum of reverse clamping voltages of the Zener diodes Z1 and Z2 (wherein the reverse conducting voltages of Z1 and Z2 are 5.1V), the triode Q6 is conducted, the triode Q4 is turned off, the triode Q1 is turned off, and the output circuit enters a voltage stabilizing output stage. At the moment, the circuit outputs +12V in a voltage-stabilizing mode, after the contactor acts, the enabling signal can be selected according to the type of the contactor to conduct the triode Q5, the triode Q2 is conducted, and the voltage-stabilizing diode Z1 is bypassed. At this time, the feedback loop of the main loop is a triode Q2, a Zener diode Z2 and a resistor R11, and the feedback voltage is the conduction voltage of the Zener diode Z2 plus the conduction voltage drop of the triode Q2. The main loop output is now about + 6V.
The utility model discloses a BUCK topology constitutes in addition simple voltage feedback, and the voltage feedback return circuit is established ties through two zener diode and is realized, and zener diode Z1 of establishing ties is parallelly connected with a PNP triode Q2's C, E utmost point, and the base of triode passes through resistance R4, triode Q5, resistance R6 links to control signal to the realization is according to the function of obstructed contactor type selection output voltage, and need not fix the voltage that produces two kinds of differences. Through the implementation of the utility model, one path of power supply can be reduced, when the contactor with the resistance characteristic is used, after the contactor is conducted, the triode Q5 is driven to be conducted through the control signal, and then the triode Q2 is conducted, and the voltage stabilizing diode Z1 is bypassed to achieve the purpose of low-voltage output and power consumption reduction; when the contactor with the built-in power supply is used, the master control does not give an enable signal, and the voltage of +12V is output at the moment to ensure that the contactor works normally. The circuit can perfectly solve the defects of the existing scheme and can obtain better practical effect.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, various changes and modifications can be made by the owner within the scope of the appended claims, and the protection scope of the present invention should not be exceeded by the claims.
Claims (3)
1. The utility model provides a relay drive circuit of two pressure outputs of wide voltage input which characterized in that: the drive circuit is connected with the main circuit of the BUCK circuit, the main circuit of the BUCK circuit is connected with the voltage feedback circuit, the voltage feedback circuit is also connected with the drive circuit and is used for adjusting the output voltage of the drive circuit, the voltage feedback circuit comprises a Zener diode Z1, a Zener diode Z2, a resistor R11, a triode Q2, a resistor R4, a triode Q5, a resistor R6 and a resistor R9, the cathode of the Zener diode Z1 is connected with the emitter of a triode Q2 and the drive circuit, the anode of the Zener diode Z1 is connected with the collector of a triode Q2 and the cathode of the Zener diode Z2, the base of the triode Q2 is connected with the collector of the triode Q5 through the resistor R4, the emitter of the triode Q5 is grounded, the base of the triode Q5 is connected with the resistors R6 and R9, the other end of the resistor R9 is grounded, one end of the resistor R11 is connected with the anode of the Zener diode Z2, the other end of the resistor R11 is connected with a main loop of the BUCK circuit.
2. The wide voltage input dual voltage output relay drive circuit according to claim 1, characterized in that: the driving circuit comprises a resistor R2, a resistor R3, a resistor R5, a capacitor C3, a resistor R8, a triode Q4 and a triode Q6, the base of the triode Q4 is connected with the collectors of the resistor R5 and the triode Q6, the emitter of the triode Q4 is grounded, the collector of the triode Q4 is connected with the resistor R3 and the capacitor C3, the other end of the capacitor C3 is connected with the base of the triode Q6 and the resistor R11, the base of the triode Q6 is grounded through a resistor R8, a resistor R3 is further connected with a resistor R2, and the resistor R2 and the resistor R3 are both connected with a BUCK circuit main circuit.
3. The wide voltage input dual voltage output relay drive circuit according to claim 1, characterized in that: the main loop of the BUCK circuit comprises a triode Q1, an inductor L1 and a diode D3, a resistor R2 is connected between an emitter and a base of the triode Q1, a base of the triode Q1 is further connected with a resistor R3, a collector of the triode Q1 is connected with a cathode of the diode D3 and an inductor L1, the inductor L1 is further connected with an emitter of the triode Q2, and an anode of the diode D3 is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121038772.6U CN214624883U (en) | 2021-05-16 | 2021-05-16 | Relay drive circuit with wide-voltage input and double-voltage output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121038772.6U CN214624883U (en) | 2021-05-16 | 2021-05-16 | Relay drive circuit with wide-voltage input and double-voltage output |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214624883U true CN214624883U (en) | 2021-11-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121038772.6U Active CN214624883U (en) | 2021-05-16 | 2021-05-16 | Relay drive circuit with wide-voltage input and double-voltage output |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214624883U (en) |
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2021
- 2021-05-16 CN CN202121038772.6U patent/CN214624883U/en active Active
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Address after: 510000, No. 2, 4, 6, 8, 10, and 12 Donghua Huaye Road, Renhe Town, Baiyun District, Guangzhou City, Guangdong Province (Airport Baiyun) Patentee after: GUANGZHOU FELICITY SOLAR TECHNOLOGY Co.,Ltd. Country or region after: China Address before: No.23, Donghua Xingfu street, Renhe Town, Baiyun District, Guangzhou, Guangdong 510000 Patentee before: GUANGZHOU FELICITY SOLAR TECHNOLOGY Co.,Ltd. Country or region before: China |
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