CN208478239U - A kind of all-wave resistance-capacitance depressurization relay drive circuit of low-power consumption - Google Patents
A kind of all-wave resistance-capacitance depressurization relay drive circuit of low-power consumption Download PDFInfo
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- CN208478239U CN208478239U CN201820630831.0U CN201820630831U CN208478239U CN 208478239 U CN208478239 U CN 208478239U CN 201820630831 U CN201820630831 U CN 201820630831U CN 208478239 U CN208478239 U CN 208478239U
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Abstract
A kind of all-wave resistance-capacitance depressurization relay drive circuit of low-power consumption, the boost control circuit connected with the resistance-capacitance depressurization power supply circuit of 5VDC voltage, MCU control circuit, relay drive circuit with the first I/O port of MCU in MCU control circuit including generating 12VDC voltage, 5V voltage output end connection in the voltage input end and capacitance-resistance voltage reduction circuit of boost control circuit, the second I/O port of MCU is connect with relay drive circuit in MCU control circuit, and relay coil one end of relay drive circuit is connected to the output end of boost control circuit；5V voltage output end in capacitance-resistance voltage reduction circuit is connected to the power control terminal of MCU in MCU control circuit, and the utility model booster circuit makes relay driving electric current reduce 1 times, reduces the operating current of capacitance-resistance voltage reduction circuit, circuit is simpler and minimizes.
Description
Technical field
The utility model relates to the control system fields of household electrical appliance, and in particular to a kind of all-wave resistance-capacitance depressurization of low-power consumption
Relay drive circuit.
Background technique
With the growth of the market demand of Mobile portable formula household electrical appliance (small household appliances), household electrical appliance miniaturization, miniaturization
Development speed it is more rapid；Due to the small size of small household electrical appliance, the requirement of low cost, resistance-capacitance depressurization power supply circuit is in little Jia
It is widely used in electric product.
But the effective power under resistance-capacitance depressurization power supply circuit mode is relatively low, the specification type of the device of capacitance-resistance voltage reduction circuit
After number determining, the electric current of output has also just determined therewith, and the bearing power being attached thereto is more certain, cannot change it is big, when
When relay or heavy load is added in rear end, obtaining electric current just will increase capacitance, not only increase cost, increase volume, and
Also it will increase circuit standby power consumption, to greatly increase the energy consumption of product and influence the safety and stability of product.
Utility model content
To solve the above problems, providing a kind of all-wave resistance-capacitance depressurization relay drive circuit of low-power consumption.
The purpose of this utility model is achieved in that
A kind of all-wave resistance-capacitance depressurization relay drive circuit of low-power consumption, including 12VDC voltage and 5VDC voltage can be generated
Resistance-capacitance depressurization power supply circuit, MCU control circuit, relay drive circuit, further include first with MCU in MCU control circuit
The boost control circuit of I/O port connection, the voltage input end of the boost control circuit and the resistance-capacitance depressurization power supply circuit
In the connection of 5V voltage output end, the second I/O port of MCU is connect with relay drive circuit in the MCU control circuit, institute
The relay coil one end for the relay drive circuit stated is connected to the output end of boost control circuit；The resistance-capacitance depressurization supplies
5V voltage output end in circuit is electrically connected to the power control terminal of MCU in MCU control circuit.
The resistance-capacitance depressurization power supply circuit includes first capacitor C1, the second capacitor C2, third capacitor C3, the 4th capacitor
C4, rectifier bridge D1, voltage-stabiliser tube D2, first resistor R1, second resistance R2, linear voltage regulator VR1, wherein the one end first capacitor C1 is electric
It is connected to mains electricity input end, decompression processing is carried out to alternating current, then the alternating current after decompression is input among rectifier bridge D1, is rectified
Mains AC is rectified into direct current and passes through voltage-stabiliser tube D2 for direct current pressure stabilizing into direct current 5V and 12V by bridge D1.
The boost control circuit includes the first triode T1A, the second triode T1B, diode D4, the 5th capacitor
C5,3rd resistor R3, wherein the base stage of the first triode T1A is connected by the first I/O port of the first current-limiting resistance R4 and MCU, the
The base stage of one triode T1A also passes through the first pull down resistor R5 ground connection, and the collector of the first triode T1A passes through the second current limliting electricity
Resistance R6 is connect with the base stage of the second triode T1B, and the 4th resistance R7 is equipped between the second triode T1B base stage and emitter, the
The emitter of two triode T1B is connected to the anode of diode D4, and the anode of diode D4 is also and in resistance-capacitance depressurization power supply circuit
The connection of 12VDC voltage output end, the cathode of diode D4 are connected to the anode of the 5th capacitor C5, the anode output of the 5th capacitor C5
24V voltage, the cathode of the 5th capacitor C5 is connected to one end of 3rd resistor R3, while this end of 3rd resistor R3 is additionally coupled to
The collector of two triode T1B, the other end ground connection of 3rd resistor.
The relay drive circuit includes relay K1, third transistor T2A, diode D3, wherein the three or three pole
The base stage of pipe T2A is connected by the second I/O port of third current-limiting resistance R8 and MCU, and the base stage of third transistor T2A also passes through the
Two pull down resistor R9 ground connection, the collector of third transistor T2A are connected to one end of coil, and the other end of coil is connected to boosting
The positive 24V voltage output end of the 5th capacitor C5 of control circuit.
The utility model has the beneficial effects that be loaded based on relay in the utility model, in order to reduce bearing power, subtract
The volume and capacity of filter capacitor in small capacitance-resistance voltage reduction circuit, release voltage low characteristic high using voltage when the actuating of relay,
12V DC is increased to by booster circuit moment to use 12V D/C voltage guard relay after 24V DC drives the actuating of relay
State makes relay driving electric current reduce 1 times, the operating current of capacitance-resistance voltage reduction circuit is substantially reduced, to keep circuit simpler
Single and miniaturization.
Detailed description of the invention
Fig. 1 is the circuit diagram of the load connection circuit of the resistance-capacitance depressurization of the utility model.
Specific embodiment
As shown in the picture, the all-wave resistance-capacitance depressurization relay drive circuit of a kind of low-power consumption, including 12VDC voltage can be generated
With resistance-capacitance depressurization power supply circuit, MCU control circuit, the relay drive circuit of 5VDC voltage, further include in MCU control circuit
The boost control circuit of the first I/O port connection of MCU, the voltage input end of the boost control circuit and the capacitance-resistance drop
The 5V voltage output end connection in power supply circuit is pressed, the second I/O port and relay driving electricity of MCU in the MCU control circuit
Road connection, relay coil one end of the relay drive circuit is connected to the output end of boost control circuit；Described
5V voltage output end in resistance-capacitance depressurization power supply circuit is electrically connected to the power control terminal of MCU in MCU control circuit.
The resistance-capacitance depressurization power supply circuit includes first capacitor C1, the second capacitor C2, third capacitor C3, the 4th capacitor
C4, rectifier bridge D1, voltage-stabiliser tube D2, first resistor R1, second resistance R2, linear voltage regulator VR1, wherein the one end first capacitor C1 is electric
It is connected to mains electricity input end, the other end is connected to one end of second resistance R2, and first resistor R1 is in parallel with first capacitor C1, and second
The other end of resistance R2 is connected to one end of rectifier bridge D1, and the other end of rectifier bridge is connected to the cathode of the D2 of voltage-stabiliser tube, pressure stabilizing
The plus earth of pipe D2, the second capacitor C2 is in parallel with voltage-stabiliser tube D2, and the positive terminal of the second capacitor C2 is connected to linear voltage regulator VR1
Input terminal, the output end of linear voltage regulator VR1 is connected to one end of third capacitor C3, the other end ground connection of third capacitor C3,
4th capacitor C4 is in parallel with third capacitor C3；
The one end first capacitor C1 electrically connects mains electricity input end, carries out decompression processing to alternating current, then by the city after decompression
Electricity is input among rectifier bridge D1, rectifier bridge D1 by mains AC be rectified into direct current and by voltage-stabiliser tube D2 direct current is steady
It is pressed into direct current 5V and 12V.
The boost control circuit includes the first triode T1A, the second triode T1B, diode D4, the 5th capacitor
C5,3rd resistor R3, wherein the base stage of the first triode T1A is connected by the first I/O port of the first current-limiting resistance R4 and MCU, the
The base stage of one triode T1A also passes through the first pull down resistor R5 ground connection, and the collector of the first triode T1A passes through the second current limliting electricity
Resistance R6 is connect with the base stage of the second triode T1B, and the 4th resistance R7 is equipped between the second triode T1B base stage and emitter, the
The emitter of two triode T1B is connected to the anode of diode D4, and the anode of diode D4 is also and in resistance-capacitance depressurization power supply circuit
The connection of 12VDC voltage output end, the cathode of diode D4 are connected to the anode of the 5th capacitor C5, the anode output of the 5th capacitor C5
24V voltage, the cathode of the 5th capacitor C5 is connected to one end of 3rd resistor R3, while this end of 3rd resistor R3 is additionally coupled to
The collector of two triode T1B, the other end ground connection of 3rd resistor.
The relay drive circuit includes relay K1, third transistor T2A, diode D3, wherein the three or three pole
The base stage of pipe T2A is connected by the second I/O port of third current-limiting resistance R8 and MCU, and the base stage of third transistor T2A also passes through the
Two pull down resistor R9 ground connection, the collector of third transistor T2A are connected to one end of coil, and the other end of coil is connected to boosting
The positive 24V voltage output end of the 5th capacitor C5 of control circuit.
When relay K1 needs work to be closed, the first I/O port of MCU exports high level, drives boost control circuit, will
12V D/C voltage moment is increased to 24V, while the second I/O port of MCU drives relay drive circuit, relay K1 inhale and, when after
Electric appliance K1 inhales and the first I/O port of rear MCU exports low level, and 24V voltage is released by 3rd resistor R3 to 12V DC, because
It is greater than the release voltage of relay K1 for 12V D/C voltage, the suction and state of guard relay coil can be continued.
The utility model by increase a boost control circuit, realize relay inhale and when moment increase voltage, provide
Larger suction and electric current are inhaled and maintain a lesser electric current afterwards, to reduce capacitance, with low in energy consumption, stability is strong, cost
Low advantage.
Above-described is only preferred embodiments of the present invention, it is noted that for those skilled in the art
For, under the premise of not departing from the utility model general idea, several changes and improvements can also be made, these also should be considered as
The protection scope of the utility model.
Claims (4)
1. a kind of all-wave resistance-capacitance depressurization relay drive circuit of low-power consumption, including 12VDC voltage and 5VDC voltage can be generated
Resistance-capacitance depressurization power supply circuit, MCU control circuit, relay drive circuit, it is characterised in that: further include in MCU control circuit
The boost control circuit of the first I/O port connection of MCU, the voltage input end of the boost control circuit and the capacitance-resistance drop
The 5V voltage output end connection in power supply circuit is pressed, the second I/O port and relay driving electricity of MCU in the MCU control circuit
Road connection, relay coil one end of the relay drive circuit is connected to the output end of boost control circuit；Described
5V voltage output end in resistance-capacitance depressurization power supply circuit is electrically connected to the power control terminal of MCU in MCU control circuit.
2. the all-wave resistance-capacitance depressurization relay drive circuit of low-power consumption as described in claim 1, it is characterised in that: the resistance
Holding step-down power supply circuit includes first capacitor (C1), the second capacitor (C2), third capacitor (C3), the 4th capacitor (C4), rectifier bridge
(D1), voltage-stabiliser tube (D2), first resistor (R1), second resistance (R2), linear voltage regulator (VR1), wherein first capacitor (C1) is electric
It is connected to mains electricity input end, decompression processing is carried out to alternating current, then the alternating current after decompression is input among rectifier bridge (D1), it is whole
Mains AC is rectified into direct current and passes through voltage-stabiliser tube (D2) for direct current pressure stabilizing into direct current 5V and 12V by stream bridge (D1).
3. the all-wave resistance-capacitance depressurization relay drive circuit of low-power consumption as described in claim 1, it is characterised in that: the liter
Pressing control circuit includes the first triode (T1A), the second triode (T1B), diode (D4), the 5th capacitor (C5), third electricity
It hinders (R3), wherein the base stage of the first triode (T1A) is connect by the first current-limiting resistance (R4) with the first I/O port of MCU, first
The base stage of triode (T1A) also passes through the first pull down resistor (R5) ground connection, and the collector of the first triode (T1A) passes through the second limit
Leakage resistance (R6) is connect with the base stage of the second triode (T1B), and the second triode (T1B) is equipped with the 4th between base stage and emitter
Resistance (R7), the emitter of the second triode (T1B) are connected to the anode of diode (D4), the anode of diode (D4) also with resistance
Hold the connection of 12VDC voltage output end, the cathode of diode (D4) in step-down power supply circuit and be connected to the anode of the 5th capacitor (C5),
The anode output 24V voltage of 5th capacitor (C5), the cathode of the 5th capacitor (C5) are connected to one end of 3rd resistor (R3), simultaneously
This end of 3rd resistor (R3) is additionally coupled to the collector of the second triode (T1B), the other end ground connection of 3rd resistor (R3).
4. the all-wave resistance-capacitance depressurization relay drive circuit of low-power consumption as described in claim 1, it is characterised in that: it is described after
Electrical apparatus driving circuit includes relay (K1), third transistor (T2A), diode (D3), wherein the base of third transistor (T2A)
Pole is connect by third current-limiting resistance (R8) with the second I/O port of MCU, and the base stage of third transistor (T2A) also passes through the second drop-down
Resistance (R9) ground connection, the collector of third transistor (T2A) are connected to one end of coil, and the other end of coil is connected to boosting control
The positive 24V voltage output end of the 5th capacitor (C5) of circuit processed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820630831.0U CN208478239U (en) | 2018-04-28 | 2018-04-28 | A kind of all-wave resistance-capacitance depressurization relay drive circuit of low-power consumption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820630831.0U CN208478239U (en) | 2018-04-28 | 2018-04-28 | A kind of all-wave resistance-capacitance depressurization relay drive circuit of low-power consumption |
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| Publication Number | Publication Date |
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| CN208478239U true CN208478239U (en) | 2019-02-05 |
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| CN201820630831.0U Active CN208478239U (en) | 2018-04-28 | 2018-04-28 | A kind of all-wave resistance-capacitance depressurization relay drive circuit of low-power consumption |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111458473A (en) * | 2020-05-26 | 2020-07-28 | 扬州大学 | Method for reducing power consumption of large water area water quality monitoring sensing node |
-
2018
- 2018-04-28 CN CN201820630831.0U patent/CN208478239U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111458473A (en) * | 2020-05-26 | 2020-07-28 | 扬州大学 | Method for reducing power consumption of large water area water quality monitoring sensing node |
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