Power conversion control circuit for controlling weak current based on strong current

Abstract

A power conversion control circuit for controlling weak current based on strong current comprises a relay RY1, a rectifier DB1 and a key SW1, a mains supply is connected into the circuit through the key SW1 and connected into a rectifier bridge DB1 through a current-limiting resistor R1 and a filter capacitor C1, and after direct current is output through the rectifier bridge DB1, the direct current passes through an energy storage capacitor C2, a current-limiting resistor R2 and a voltage stabilizing diode Z1; and the strong current end of the relay RY1 is connected with a 220V commercial power terminal above the strong current end, and a commercial power live wire passes through an intersection point in front of the rectifier bridge DB1 to form a strong current load loop. Through a simple key switch and a rectification, voltage stabilization and relay control circuit, a weak current element is controlled through strong current input, a strong current load is further driven to work, and an economical and efficient control scheme is achieved.

Description

Technical field

[0002] The utility model relates to the technical field of power conversion control, in particular to a technical field of conversion control based on strong electricity controlling weak electricity. [Background Technology]

[0004] Many industrial and household applications currently require high-voltage (e.g., AC 220V) power conversion to drive a device. This low-voltage device then uses a microcontroller or other control unit to control the on / off of another high-voltage circuit. However, conventional switches for controlling high-voltage loads are often complex and costly. [Summary of the invention]

[0006] In response to the above problems, the utility model provides a simplified power conversion and relay control circuit. Through a simple key switch, a rectifier and voltage stabilizing circuit combined with a relay, the weak-current components are controlled by a strong-current input, and the strong-current load is further driven to achieve an economical and efficient control solution.

[0007] The power conversion control circuit involved in the present utility model includes a relay RY1, a rectifier DB1, and a button SW1, wherein the live wire and the neutral wire of the AC 220V mains power are connected to the circuit through the button SW1, and are connected to the rectifier bridge DB1 through the current limiting resistor R1 and the filter capacitor C1. After the DC power is rectified by the rectifier bridge DB1, it passes through the energy storage capacitor C2, the current limiting resistor R2, and the voltage regulator diode Z1 respectively; wherein two branches are connected in parallel between the positive and negative poles of the DC power, the first branch is connected to the energy storage capacitor C2, and the second branch is connected in parallel with the voltage regulator diode Z1, and the current limiting resistor R2 is connected in series in the DC positive pole circuit; finally, it is connected to the relay RY1, the high-voltage end of the relay RY1 is connected to the 220V mains terminal above, and the live wire of the mains power passes through the intersection before the rectifier bridge DB1 to form a high-voltage load circuit.

[0008] A discharge resistor R3 is connected in parallel to the filter capacitor C1. The discharge resistor R3 provides a way to gradually discharge the capacitor C1 to cope with the high voltage remaining on the filter capacitor C1 after the circuit is powered off.

[0009] The current limiting resistor R1 is used to limit the inrush current when the mains electricity enters the circuit, thereby protecting other components of the circuit.

[0010] The filter capacitor C1 filters the input mains power to reduce the impact of high-frequency noise and transient voltage on the circuit.

[0011] The voltage stabilizing diode Z1 is used to stabilize the DC voltage output by the energy storage capacitor C2 to 24V, ensuring that the circuit outputs a stable 24V voltage to supply the relay RY1.

[0012] A current limiting resistor R2 is provided at the voltage stabilizing diode Z1 , and the current limiting resistor R2 is used to protect the current at the voltage stabilizing diode Z1 to avoid damage to components due to excessive current.

[0013] The relay RY1 is a 24V DC relay. When the circuit outputs a stable 24V DC, the coil of the relay RY1 is energized, the relay RY1 starts to work, and connects the 220V high-voltage load circuit.

[0014] The control circuit involved in the utility model controls weak-current components through strong-current input through a simple key switch and a rectification, voltage stabilization and relay-controlled circuit, further drives the operation of strong-current loads, and realizes an economical and efficient conversion control solution.

Brief Description of the Drawings

[0016] Figure 1 This is a power conversion control circuit diagram based on strong current controlling weak current involved in the utility model; [Specific implementation method]

[0018] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention.

[0019] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] Please refer to the attached Figure 1 , which shows a schematic diagram of a power conversion control circuit that emphasizes controlling weak current involved in the utility model. The power conversion control circuit includes a relay RY1, a rectifier DB1, and a button SW1. Through the button SW1, the live wire and neutral wire of the AC 220V mains power are connected to the circuit to start powering the subsequent circuits.

[0021] After the mains power line is connected, it first passes through current-limiting resistor R1 to suppress the inrush current when the mains power enters the circuit and protect other circuit components. It then passes through filter capacitor C1 to filter the input mains power and reduce the impact of high-frequency noise and transient voltage on the circuit.

[0022] A discharge resistor R3 is connected in parallel with the filter capacitor C1. The discharge resistor R3 provides a path for the filter capacitor C1 to discharge gradually. When the circuit is powered off, a high voltage may remain on the filter capacitor C1. The discharge resistor R3 provides a path for the filter capacitor C1 to discharge gradually, ensuring that the voltage of the filter capacitor C1 does not maintain a high potential for a long time after power is off, thereby preventing the voltage of the filter capacitor C1 from affecting the operator or subsequent circuit components.

[0023] After passing through current-limiting resistor R1 and filter capacitor C1, the rectified AC voltage is connected to rectifier bridge DB1, which converts the AC power into pulsating DC power. The output of rectifier bridge DB1 has two polarity terminals: + (positive) and - (negative), providing DC voltage for subsequent circuits.

[0024] After being rectified by rectifier bridge DB1, the DC power is output and passes through energy storage capacitor C2, current-limiting resistor R2, and voltage-stabilizing diode Z1. Two branches are connected in parallel between the positive and negative poles of the pulsating DC power. The first branch is connected to energy storage capacitor C2. After the pulsating DC power is output, it is first smoothed by energy storage capacitor C2. Capacitor C2's main function is to eliminate ripples in the DC power, making the output voltage more stable and providing a stable DC voltage for subsequent circuits.

[0025] The second branch is connected in parallel with a Zener diode Z1, and a current-limiting resistor R2 is connected in series with the DC positive circuit. Zener diode Z1 stabilizes the DC voltage output from energy storage capacitor C2 to 24V, ensuring a stable 24V voltage is supplied to relay RY1. Current-limiting resistor R2 protects the Zener diode from damage to components caused by excessive current.

[0026] Finally, a stable 24V voltage is output to relay RY1. The high-voltage end of relay RY1 is connected to the 220V AC terminal above. The AC live wire passes through the intersection before the rectifier bridge DB1 to form a high-voltage load circuit.

[0027] The relay RY1 is a 24V DC relay. When the circuit outputs a stable 24V DC, the coil of the relay RY1 is energized, the relay RY1 starts to work, and connects the 220V high-voltage load circuit.

[0028] The working principle of the entire circuit is: when the button SW1 is pressed and the entire circuit is started, the circuit provides 24V DC power through the rectifier bridge DB1 and the voltage regulator circuit to drive the relay RY1 to work. The closed circuit of the relay RY1 energizes the upper high-voltage circuit and drives the operation of the high-voltage load.

[0029] As described above, it is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention is disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technology of the present invention that do not depart from the content of the technical solution of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A power conversion control circuit based on strong power to control weak power, characterized in that: The control circuit includes a relay RY1, a rectifier DB1, and a button SW1, wherein the live wire and the neutral wire of the AC 220V mains power are connected to the circuit through the button SW1, and are connected to the rectifier bridge DB1 through the current limiting resistor R1 and the filter capacitor C1. After the DC power is rectified by the rectifier bridge DB1, it passes through the energy storage capacitor C2, the current limiting resistor R2, and the voltage-stabilizing diode Z1 respectively; wherein two branches are connected in parallel between the positive and negative poles of the DC power, the first branch is connected to the energy storage capacitor C2, and the second branch is connected in parallel with the voltage-stabilizing diode Z1, and the current limiting resistor R2 is connected in series in the DC positive pole circuit; finally, it is connected to the relay RY1, and the high-voltage end of the relay RY1 is connected to the 220V mains terminal above, and the mains live wire passes through the intersection before the rectifier bridge DB1 to form a high-voltage load circuit.

2. The power conversion control circuit based on strong current controlling weak current according to claim 1, characterized in that: A discharge resistor R3 is connected in parallel to the filter capacitor C1. The discharge resistor R3 provides a way to gradually discharge the capacitor C1 to cope with the high voltage remaining on the filter capacitor C1 after the circuit is powered off.

3. The power conversion control circuit based on strong current controlling weak current according to claim 1, characterized in that: The current limiting resistor R1 is used to limit the inrush current when the mains electricity enters the circuit.

4. The power conversion control circuit based on strong current controlling weak current according to claim 1, characterized in that: The filter capacitor C1 filters the input mains power to reduce the impact of high-frequency noise and transient voltage on the circuit.

5. The power conversion control circuit based on strong current controlling weak current according to claim 1, characterized in that: The voltage stabilizing diode Z1 is used to stabilize the DC voltage output by the energy storage capacitor C2 to 24V, and the circuit outputs a stable 24V voltage to supply the relay RY1.

6. The power conversion control circuit based on strong current controlling weak current according to claim 5, characterized in that: A current limiting resistor R2 is provided at the voltage stabilizing diode Z1 , and the current limiting resistor R2 is used to limit the current at the voltage stabilizing diode Z1 to avoid excessive current.

7. The power conversion control circuit based on strong current controlling weak current according to claim 1, characterized in that: The relay RY1 is a 24V DC relay. When the circuit outputs a stable 24V DC, the coil of the relay RY1 is energized, the relay RY1 starts to work, and connects the 220V high-voltage load circuit.

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