Relay control circuit with low power consumption

Abstract

The utility model discloses a relay control circuit with low power consumption, which comprises a main control loop and a secondary control loop, the main control loop comprises a diode D3, a diode E27, an MOS tube Q5, a resistor R11, a resistor R15 and a resistor R108, the secondary control loop comprises an MOS tube Q3, a resistor R5, a resistor R8, a resistor R12 and a resistor R16, the negative electrode of the diode D3 is connected with the resistor R108 and 12V voltage, and the negative electrode of the diode E27 is connected with the resistor R16. The other end of the resistor R108 is connected with the positive electrode of a diode E27, and the negative electrode of the diode E27 is connected with a resistor R5, a resistor R8, the positive electrode of a diode D3 and the drain electrode of an MOS tube Q5. According to the utility model, after the current-limiting resistor is added, the current is limited to 120mA and is reduced by half compared with the normal working current of 300mA, so that the consumption of stored energy is greatly reduced, whether the power consumption is reduced or not can be switched and selected, and the power consumption of the relay module is reduced and the energy waste of the whole system is weakened by switching the driving enabling pin and controlling the driving circuit used by the relay.

Description

TECHNICAL FIELD

[0001] The utility model relates to relay technology field especially relates to a low -power consumption relay control circuit. BACKGROUND

[0002] The prior art adopts the single driving circuit, and the power consumption of the circuit is basically sustained, which has redundancy compared with the current of the normal operation of the relay, and there is a great waste of energy at the energy storage application end of the storage battery. SUMMARY

[0003] In order to make up for the deficiency of the prior art, the application provides a low-power consumption relay control circuit to solve the problems in the prior art.

[0004] In order to solve the above technical problems, the utility model provides the following technical scheme:

[0005] A low-power consumption relay control circuit, including main control loop and secondary control loop, main control loop includes diode D3, diode E27, MOS tube Q5, resistance R11, resistance R15 and resistance R108, secondary control loop includes MOS tube Q3, resistance R5, resistance R8, resistance R12 and resistance R16, the negative pole of diode D3 is connected with resistance R108 and 12V voltage, the other end of resistance R108 is connected with the positive pole of diode E27, the negative pole of diode E27 is connected with resistance R5, resistance R8, the positive pole of diode D3 and the drain of MOS tube Q5, the gate of MOS tube Q5 is connected with resistance R11 and resistance R15, the other end of resistance R11 is connected with signal RELAY_A, the other end of resistance R15 is grounded, the other end of resistance R5 is connected with the other end of resistance R8 and the drain of MOS tube Q3, the source of MOS tube Q3 is grounded, the gate of MOS tube Q3 is connected with resistance R12 and resistance R16, the other end of resistance R16 is grounded, the other end of resistance R12 is connected with signal RELAY_B.

[0006] As a further technical scheme of the utility model: the diode E27 is a light emitting diode.

[0007] As a further technical scheme of the utility model: the diode D3 is a voltage stabilizing diode.

[0008] As a further technical scheme of the utility model: the MOS tube Q3 is a P-MOS tube.

[0009] As a further technical scheme of the utility model: the MOS tube Q5 is a P-MOS tube.

[0010] One or more technical solutions provided in the application embodiment have at least the following technical effects or advantages:

[0011] This invention limits the current to 120mA by adding a current-limiting resistor, which is half of the normal operating current of 300mA. This greatly reduces the consumption of stored energy. Furthermore, it allows for switching between reducing power consumption and controlling the drive circuit used by the relay by switching the drive enable pin, thereby reducing the power consumption of the relay module and minimizing energy waste in the overall system. Attached Figure Description

[0012] Figure 1 This is the overall schematic diagram of this utility model. Detailed Implementation

[0013] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0014] Example 1, as Figure 1 As shown, a low-power relay control circuit includes a main control circuit and a secondary control circuit. The main control circuit includes diode D3, diode E27, MOSFET Q5, resistors R11, R15, and R108. The secondary control circuit includes MOSFET Q3, resistors R5, R8, R12, and R16. The cathode of diode D3 is connected to resistor R108 and a 12V voltage. The other end of resistor R108 is connected to the anode of diode E27. The cathode of diode E27 is connected to resistors R5, E27, R18, R19, and R108. The resistor R8, the positive terminal of the diode D3, and the drain of the MOSFET Q5 are connected. The gate of the MOSFET Q5 is connected to resistors R11 and R15. The other end of resistor R11 is connected to the signal RELAY_A, and the other end of resistor R15 is grounded. The other end of resistor R5 is connected to the other end of resistor R8 and the drain of the MOSFET Q3. The source of the MOSFET Q3 is grounded. The gate of the MOSFET Q3 is connected to resistors R12 and R16. The other end of resistor R16 is grounded, and the other end of resistor R12 is connected to the signal RELAY_B.

[0015] In this configuration, diode E27 is a light-emitting diode (LED). Diode D3 is a Zener diode. MOSFET Q3 is a P-MOS transistor. MOSFET Q5 is a P-MOS transistor.

[0016] The working principle is as follows:

[0017] The circuit adds another set of switchable drive circuit (secondary control circuit) to the conventional relay drive circuit (main control circuit), and adds two 200 ohm (R5, R8) parallel resistors to the circuit (secondary control circuit) to limit the power consumption of the relay while working normally; when the relay is started for the first time, the RELAY A port gives a signal to drive the MOS (Q5) to open, and the relay works normally to open, at this time the power consumption is the rated working current of the relay, then switch the RELAY B signal to drive the MOS (Q3) to open, and close the RELAY A port, at this time the relay uses the (secondary control circuit) drive circuit, and the limited current is 120mA, which reduces the power consumption of the relay in continuous use.

[0018] The design increases the current limiting resistor to be limited to 120mA, which is reduced by half compared with the normal working current of 300mA, greatly reducing the consumption of energy storage energy, and the switch can choose whether to reduce the power consumption.

[0019] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

[0020] In addition, it should be understood that although the present application is described in the specification in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is 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 have been properly combined to form other embodiments easily understood by those skilled in the art.

Claims

1. A low power consumption relay control circuit comprising a primary control loop and a secondary control loop, characterized in that: The main control circuit comprises a diode D3, a diode E27, a MOS Q5, a resistor R11, a resistor R15 and a resistor R108, and the secondary control circuit comprises a MOS Q3, a resistor R5, a resistor R8, a resistor R12 and a resistor R16, the negative pole of the diode D3 is connected with the resistor R108 and a 12V voltage, the other end of the resistor R108 is connected with the positive pole of the diode E27, the negative pole of the diode E27 is connected with the resistor R5, the resistor R8, the positive pole of the diode D3 and the drain of the MOS Q5, the gate of the MOS Q5 is connected with the resistor R11 and the resistor R15, the other end of the resistor R11 is connected with a signal RELAY_A, the other end of the resistor R15 is grounded, the other end of the resistor R5 is connected with the other end of the resistor R8 and the drain of the MOS Q3, the source of the MOS Q3 is grounded, the gate of the MOS Q3 is connected with the resistor R12 and the resistor R16, the other end of the resistor R16 is grounded, and the other end of the resistor R12 is connected with a signal RELAY_B.

2. The low power consumption relay control circuit according to claim 1, wherein The diode E27 is a light emitting diode.

3. The low power consumption relay control circuit according to claim 1, wherein The diode D3 is a voltage stabilizing diode.

4. The low power consumption relay control circuit according to claim 1, wherein The MOS Q3 is a P-MOS.

5. The low power consumption relay control circuit according to claim 1, wherein The MOS Q5 is a P-MOS.

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