Resistance-capacitance power supply circuit

Abstract

The utility model discloses a resistance-capacitance power supply circuit, which relates to the field of power supply and comprises a resistance-capacitance power supply module used for reducing voltage of input alternating current and then outputting the voltage to a voltage processing module; the voltage processing module is used for converting alternating current into direct current and supplying the direct current to the relay working module; the relay working module is used for working of a relay; whether the relay works or not, the current flows to the voltage stabilization output module through the relay working module. The stable voltage output module is used for outputting stable voltage to a load; compared with the prior art, the utility model has the beneficial effects that the relay working module and the voltage stabilization output module are connected in series, and the relay working units in the relay working module are also connected in series, so that the capacity of a CBB capacitor (capacitor C1) is selected according to the maximum load current in series loads, and compared with the traditional scheme, the capacity of the CBB capacitor is greatly improved. The CBB capacitor can be a capacitor with small capacity, the power consumption of the board is small, and the anti-surge capability of the circuit is strong.

Description

TECHNICAL FIELD

[0001] The utility model relates to power supply field, concretely is a kind of resistance-capacitance power supply circuit. BACKGROUND

[0002] The resistance-capacitance power supply of alternating current to direct current currently used in market, generally is after capacitive current limiting, voltage stabilizing tube is added to stabilize power supply, and then supply each load, this mode needs CBB capacitor capacity to be relatively large.Load lightens, and the current passing through voltage stabilizing tube increases, and the heat of voltage stabilizing tube is caused to burn out. Figure One The selection of CBB capacitor (capacitor C1) capacity is according to the sum of relay RY1, RY2 and 5V load current, when relay is turned off, the current flowing through relay is added to 12V voltage stabilizing tube, and the heat of voltage stabilizing tube is caused.

[0003] Therefore, the existing resistance-capacitance power supply CBB capacitor capacity is large, and the power consumption of board is also increased, and the anti-surge capacity is reduced, and needs improvement. CONTENT OF UTILITY MODEL

[0004] The utility model aims at providing a kind of resistance-capacitance power supply circuit to solve the problems raised in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A kind of resistance-capacitance power supply circuit, comprising:

[0007] Resistance-capacitance power supply module is used to output to voltage processing module after input alternating current is stepped down;

[0008] Voltage processing module is used to convert alternating current into direct current and supply relay working module;

[0009] Relay working module is used for relay work;Regardless of whether relay works, current flows to voltage stabilizing output module through relay working module;

[0010] Voltage stabilizing output module is used to output stable voltage and supply load;

[0011] Resistance-capacitance power supply module connects voltage processing module, voltage processing module connects relay working module, and relay working module connects voltage stabilizing output module.

[0012] As the further scheme of the utility model: resistance-capacitance power supply module includes capacitor C1, resistance R1, one end of capacitor C1 is connected with one end of resistance R1, P1 end of alternating current, the other end of capacitor C1 is connected with the other end of resistance R1, voltage processing module.

[0013] As a further scheme of the utility model: the voltage processing module includes rectifier BR1, capacitor C3, the first end of rectifier BR1 is connected to the blocking capacitor power supply module, the second end of rectifier BR1 is grounded, the third end of rectifier BR1 is connected to the P2 end of alternating current, the fourth end of rectifier BR1 is connected to one end of capacitor C3, relay work module, the other end of capacitor C3 is grounded.

[0014] As a further scheme of the utility model: the relay work module includes multiple relay work units, multiple relay work units are connected in series, the first relay work unit is connected to the voltage processing module, the last relay work unit is connected to the voltage stabilizing output module, the relay work unit includes relay RY1, diode D1, triode Q1, resistance R2, one end of relay RY1 is connected to the negative pole of diode D1 and the emitter of triode Q1, the other end of relay RY1 is connected to the positive pole of diode D1 and the collector of triode Q1, the base of triode Q1 is connected to one end of resistance R2, the other end of resistance R2 is introduced to the control signal of MCU, and the control signal of different relay work units introduced to the control signal of MCU is different.

[0015] As a further scheme of the utility model: the voltage stabilizing output module includes capacitor C4, capacitor EC1, voltage stabilizer U1, capacitor EC2 and capacitor C2, the input end of voltage stabilizer U1 is connected to one end of capacitor C4 and one end of capacitor EC1, the other end of capacitor C4 is grounded, the other end of capacitor EC1 is grounded, the ground end of voltage stabilizer U1 is grounded, the output end of voltage stabilizer U1 is connected to one end of capacitor EC2 and one end of capacitor C2, the other end of capacitor EC2 is grounded, and the other end of capacitor C2 is grounded.

[0016] As a further scheme of the utility model: the voltage processing module includes diode D1, diode D2 and capacitor C3, the negative pole of diode D1 is connected to the positive pole of diode D2 and the blocking capacitor power supply module, the positive pole of diode D1 is connected to the P2 end of alternating current, the negative pole of diode D2 is connected to one end of capacitor C3 and the relay work module, and the other end of capacitor C3 is connected to the P2 end of alternating current.

[0017] As a further scheme of the utility model: the voltage stabilizing output module includes diode D24 and capacitor EC1, the negative pole of diode D24 is connected to one end of capacitor EC1 and the relay work module, the positive pole of diode D24 is grounded, and the other end of capacitor EC1 is grounded.

[0018] Compared with the prior art, the relay working module and the voltage stabilizing output module are connected in series in the utility model, and the relay working unit in the relay working module is also connected in series, so that the selection of the capacity of the CBB capacitor (capacitor C1) is based on the maximum load current in the series load, compared with the traditional scheme, the CBB capacitor capacity can be selected as a small capacity capacitor, the power consumption of the board is small, and the circuit has strong surge resistance. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a circuit diagram of an existing resistance-capacitance power supply circuit.

[0020] Figure 2 It is a first circuit diagram of a resistance-capacitance power supply circuit.

[0021] Figure 3 It is a second circuit diagram of a resistance-capacitance power supply circuit. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0023] Please refer to Figure 2 and Figure 3 A resistance-capacitance power supply circuit comprises:

[0024] The resistance-capacitance power supply module is used for outputting the input alternating current after voltage reduction to the voltage processing module.

[0025] The voltage processing module is used for converting alternating current into direct current to supply the relay working module.

[0026] The relay working module is used for relay working; no matter whether the relay works or not, current flows to the voltage stabilizing output module through the relay working module.

[0027] The voltage stabilizing output module is used for outputting stable voltage to supply the load.

[0028] The resistance-capacitance power supply module is connected with the voltage processing module, the voltage processing module is connected with the relay working module, and the relay working module is connected with the voltage stabilizing output module.

[0029] In the embodiment, please refer to Figure 2 and Figure 3, the resistance-capacitance power supply module includes a capacitor C1 and a resistor R1, one end of the capacitor C1 is connected to one end of the resistor R1 and the P1 end of the alternating current, the other end of the capacitor C1 is connected to the other end of the resistor R1 and the voltage processing module.

[0030] After the alternating current is input, the resistance-capacitance voltage reduction is realized through the parallel connection of the capacitor C1 and the resistor R1, and the reduced voltage is supplied to the subsequent circuit.

[0031] In the embodiment, please refer to Figure 2 , the voltage processing module includes a rectifier BR1 and a capacitor C3, the first end of the rectifier BR1 is connected to the resistance-capacitance power supply module, the second end of the rectifier BR1 is grounded, the third end of the rectifier BR1 is connected to the P2 end of the alternating current, and the fourth end of the rectifier BR1 is connected to one end of the capacitor C3 and the relay working module, and the other end of the capacitor C3 is grounded.

[0032] After the reduced voltage is rectified by the rectifier BR1 and filtered by the capacitor C3, the voltage becomes stable direct current to supply the relay working module.

[0033] In the embodiment, please refer to Figure 2 and Figure 3 , the relay working module includes a plurality of relay working units, the plurality of relay working units are connected in series, the first relay working unit is connected to the voltage processing module, and the last relay working unit is connected to the voltage stabilizing output module, the relay working unit includes a relay RY1, a diode D1, a transistor Q1 and a resistor R2, one end of the relay RY1 is connected to the negative electrode of the diode D1 and the emitter of the transistor Q1, the other end of the relay RY1 is connected to the positive electrode of the diode D1 and the collector of the transistor Q1, one end of the resistor R2 is connected to the base of the transistor Q1, and the other end of the resistor R2 is connected to the control signal of the MCU, and the control signals of different relay working units are different.

[0034] Figure 2 , Figure 3 three relay working units are arranged in the embodiment, and the number of relay working units is not limited in actual use, and a single relay working unit is taken as an example for illustration, the base voltage of the transistor Q1 is controlled by the MCU, so that the conduction of the transistor Q1 is controlled by the MCU, when the transistor Q1 is turned on, the voltage difference between the two ends of the relay RY1 is small (i.e. the conduction voltage drop of the transistor Q1 can be ignored), the relay RY1 does not work, and the current is output to the voltage stabilizing output module after flowing through the transistor Q1. When the transistor Q1 is turned off, the relay RY1 works, and the current is output to the voltage stabilizing output module after flowing through the relay RY1. The maximum current is that the transistors of the three relay working units are all turned on, the impedance is ignored, and the maximum current is also the current of the voltage stabilizing output module. And Figure 1 the maximum current is the sum of the current flowing through the voltage stabilizer and the current flowing through the transistor. Therefore, the maximum current is reduced.

[0035] In the embodiment, please refer to Figure 2 , the voltage output module includes capacitor C4, capacitor EC1, voltage stabilizer U1, capacitor EC2, capacitor C2, the input end of voltage stabilizer U1 is connected with relay working module, one end of capacitor C4 and one end of capacitor EC1, the other end of capacitor C4 is grounded, the other end of capacitor EC1 is grounded, the ground end of voltage stabilizer U1 is grounded, the output end of voltage stabilizer U1 is connected with one end of capacitor EC2 and one end of capacitor C2, the other end of capacitor EC2 is grounded, and the other end of capacitor C2 is grounded.

[0036] After voltage stabilizer U1 is powered on and works, 5V voltage is output to supply load.

[0037] In the embodiment, please refer to Figure 3 , the voltage processing module includes diode D1, diode D2 and capacitor C3, the negative electrode of diode D1 is connected with the positive electrode of diode D2 and the blocking capacitor power supply module, the positive electrode of diode D1 is connected with the P2 end of alternating current, the negative electrode of diode D2 is connected with one end of capacitor C3 and relay working module, and the other end of capacitor C3 is connected with the P2 end of alternating current.

[0038] The voltage processing module can be in multiple ways, and here is another way, which is rectified by diode D1 and diode D2 and filtered by capacitor C3 to form smooth direct current.

[0039] In the embodiment, please refer to Figure 3 , the voltage output module includes diode D24 and capacitor EC1, the negative electrode of diode D24 is connected with one end of capacitor EC1 and relay working module, the positive electrode of diode D24 is grounded, and the other end of capacitor EC1 is grounded.

[0040] The voltage output module can be in multiple ways, and here is another way, which is based on the communication of voltage stabilizing diode, and the voltage on diode D24 is 5V to supply load.

[0041] The working principle of the utility model is: the blocking capacitor power supply module is used for reducing the input alternating current and outputting to the voltage processing module; the voltage processing module is used for converting alternating current into direct current to supply the relay working module; the relay working module is used for relay working; no matter whether the relay works or not, current flows to the voltage output module through the relay working module; and the voltage output module is used for outputting stable voltage to supply load.

[0042] For those skilled in the art, it is obvious that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting.

[0043] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A resistance-capacitance power supply circuit, characterized in that: The resistance-capacitance power supply circuit includes: The RC power supply module is used to reduce the voltage of the input AC power and output it to the voltage processing module; A voltage processing module is used to convert AC power into DC power to supply the relay working module; The relay working module is used for relay operation. Regardless of whether the relay is working or not, the current flows through the relay working module to the voltage stabilizing output module. Voltage stabilization output module, used to output stable voltage to supply load; The resistor-capacitor power supply module is connected to the voltage processing module, the voltage processing module is connected to the relay working module, and the relay working module is connected to the voltage stabilizing output module.

2. The RC power supply circuit according to claim 1, characterized in that: The RC power supply module includes a capacitor C1 and a resistor R1. One end of the capacitor C1 is connected to one end of the resistor R1 and the AC power terminal P1. The other end of the capacitor C1 is connected to the other end of the resistor R1 and the voltage processing module.

3. The RC power supply circuit according to claim 1, characterized in that: The voltage processing module includes a rectifier BR1 and a capacitor C3. The first end of the rectifier BR1 is connected to the RC power supply module, the second end of the rectifier BR1 is grounded, the third end of the rectifier BR1 is connected to the P2 end of the AC power, the fourth end of the rectifier BR1 is connected to one end of the capacitor C3 and the relay working module, and the other end of the capacitor C3 is grounded.

4. The RC power supply circuit according to claim 1, characterized in that: The relay working module includes multiple relay working units, which are connected in series. The first relay working unit is connected to the voltage processing module, and the last relay working unit is connected to the voltage stabilization output module. The relay working unit includes relay RY1, diode D1, transistor Q1, and resistor R2. One end of relay RY1 is connected to the cathode of diode D1 and the emitter of transistor Q1, and the other end of relay RY1 is connected to the anode of diode D1 and the collector of transistor Q1. The base of transistor Q1 is connected to one end of resistor R2, and the other end of resistor R2 introduces the control signal of MCU. Different relay working units introduce different control signals into MCU.

5. The RC power supply circuit according to claim 4, characterized in that: The voltage stabilizing output module includes capacitor C4, capacitor EC1, voltage regulator U1, capacitor EC2, and capacitor C2. The input end of the voltage regulator U1 is connected to the relay working module, one end of the capacitor C4, and one end of the capacitor EC1. The other end of the capacitor C4 is grounded. The other end of the capacitor EC1 is grounded. The ground end of the voltage regulator U1 is grounded. The output end of the voltage regulator U1 is connected to one end of the capacitor EC2 and one end of the capacitor C2. The other end of the capacitor EC2 is grounded. The other end of the capacitor C2 is grounded.

6. The RC power supply circuit according to claim 4, characterized in that: The voltage processing module includes a diode D1, a diode D2, and a capacitor C3. The cathode of the diode D1 is connected to the anode of the diode D2 and the RC power supply module. The anode of the diode D1 is connected to the P2 terminal of the AC power. The cathode of the diode D2 is connected to one end of the capacitor C3 and the relay working module. The other end of the capacitor C3 is connected to the P2 terminal of the AC power.

7. The RC power supply circuit according to claim 4, characterized in that: The voltage regulated output module includes a diode D24 and a capacitor EC1. The cathode of the diode D24 is connected to one end of the capacitor EC1 and the relay working module. The anode of the diode D24 is grounded, and the other end of the capacitor EC1 is grounded.

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