Relay switching power supply circuit and relay device

Abstract

The application provides a relay switching power supply circuit and a relay device, the circuit comprising: a voltage reduction unit for converting a wide range of input voltage into a stable low voltage output; a voltage regulation unit electrically connected with the voltage reduction unit for voltage regulation of the voltage output by the voltage reduction unit, so that the output voltage of the circuit adapts to the rated voltage requirement of the relay, wherein the voltage regulation unit comprises a feedback compensation unit, a first filter unit and a voltage division unit, the feedback compensation unit being electrically connected with the first filter unit and the voltage division unit respectively, and the first filter unit being electrically connected with the voltage division unit. The synergistic effect of the voltage reduction unit and the voltage regulation unit of the application realizes dynamic balance regulation of the output voltage, so that the output voltage of the circuit adapts to the rated voltage requirement of the relay, thereby improving the applicability of the relay switch in different power supply environments.

Description

Technical Field

[0001] This application belongs to the field of relay switching technology, and relates to a relay switching power supply circuit and a relay device. Background Technology

[0002] In traditional host computer control switch technology, existing relay switches typically adopt a design with fixed rated voltage and output voltage. This design exposes significant limitations when facing complex and ever-changing power supply environments.

[0003] The design using fixed rated voltage and output voltage has the following main problems: 1. When the input voltage deviates from the rated value (such as overvoltage or undervoltage), overvoltage may cause the coil to burn out due to overheating, and undervoltage may cause arc damage due to unstable contact engagement, leading to switch malfunction or failure, seriously affecting the stability and reliability of the system; 2. The output voltage of traditional relay switch circuits is strictly limited to the design rated value and cannot be dynamically adjusted, resulting in a relatively simple function; 3. Since the rated voltage parameter of traditional relay switches is not adjustable, in order to adapt to different voltage requirements, it is necessary to rely on redundant configuration of multiple specifications of equipment, which increases the equipment procurement cost and installation and maintenance cost. Summary of the Invention

[0004] This application provides a relay switching power supply circuit and a relay device to solve the problems of circuit instability, single function, and high cost caused by the fact that the relay switch is limited by a fixed output voltage and cannot adapt to the rated voltage requirements of different relays in the prior art.

[0005] A first aspect of this application provides a relay switching power supply circuit, the circuit comprising:

[0006] A step-down unit, which converts a wide range of input voltages into a stable low-voltage output;

[0007] A voltage regulation unit, electrically connected to the step-down unit, is used to regulate the voltage output by the step-down unit so that the output voltage of the circuit is adapted to the rated voltage requirement of the relay. The voltage regulation unit includes a feedback compensation unit, a first filter unit, and a voltage divider unit. The feedback compensation unit is electrically connected to the first filter unit and the voltage divider unit, respectively. The first filter unit is electrically connected to the voltage divider unit.

[0008] In one embodiment, the step-down unit is an SGM6132.

[0009] In one embodiment, the feedback compensation unit includes a resistor R1 and a capacitor C1 connected in series. The resistor R1 is electrically connected to the first filter unit, and the capacitor C1 is electrically connected to the step-down unit.

[0010] In one embodiment, the first filtering unit includes a capacitor C2, and the voltage divider unit includes a resistor R2 and a resistor R3 connected in series, with the capacitor C2 and the resistor R3 connected in parallel.

[0011] In one embodiment, the voltage regulation unit further includes a capacitor C3, which is electrically connected to the step-down unit via a first connection path, to the feedback compensation unit via a second connection path, to the first filter unit via a third connection path, to the voltage divider unit via a fourth connection path, and grounded via a fifth connection path.

[0012] In one embodiment, the circuit further includes a second filtering unit, which is electrically connected to the step-down unit and is used to filter out high-frequency noise in the output voltage of the step-down unit.

[0013] In one embodiment, the second filtering unit includes a resistor R4, a capacitor C4, and an inductor L1 connected in series. One end of the resistor R4 is electrically connected to the step-down unit, and the other end of the resistor R4 is electrically connected to the capacitor C4. The inductor L1 is electrically connected to the voltage regulation unit and the voltage output terminal, respectively.

[0014] In one embodiment, the circuit further includes diode D1 and diode D2;

[0015] The positive terminal of diode D1 is electrically connected to the second filter unit and the voltage regulation unit, respectively, and the negative terminal of diode D1 is electrically connected to the voltage output terminal.

[0016] The positive terminal of diode D2 is connected to ground and electrically connected to the step-down unit, and the negative terminal of diode D2 is electrically connected to the step-down unit and the second filter unit.

[0017] In one embodiment, the circuit further includes a capacitor C5, which is electrically connected to the step-down unit, the voltage input terminal, and ground.

[0018] According to a second aspect of this application, a relay device includes a relay and the circuit described above, the circuit being electrically connected to the relay and configured to dynamically adjust the output voltage according to the rated voltage requirement of the relay to control the on / off state of the relay.

[0019] As described above, this application achieves a wide voltage input function by setting a step-down unit and regulates the voltage output of the step-down unit by setting a voltage regulation unit, which can adapt to a wide range of input voltages, such as 4.5V-28.5V. This greatly improves the applicability of the relay switch in different power supply environments. At the same time, the synergistic effect of the step-down unit and the voltage regulation unit realizes dynamic balance regulation of the output voltage, so that the output voltage of the circuit can better match the rated voltage requirements of the relay, thereby enabling it to better control the on / off state of the relay. Attached Figure Description

[0020] Figure 1 The diagram shown is a schematic representation of a relay switching power supply circuit provided as an exemplary embodiment.

[0021] Figure 2 The diagram shown is a schematic representation of a relay switching power supply circuit provided as an exemplary embodiment.

[0022] Figure 3 The diagram shows a structural schematic of a relay switching power supply circuit provided as another exemplary embodiment.

[0023] Figure 4 The diagram shown is a schematic representation of a relay switching power supply circuit provided as another exemplary embodiment.

[0024] Explanation of reference numerals in the instruction manual:

[0025] 1. Step-down unit; 2. Voltage regulation unit; 21. Feedback compensation unit; 22. First filter unit; 23. Voltage divider unit; 3. Second filter unit. Detailed Implementation

[0026] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, unless otherwise specified, the following embodiments and features in the embodiments can be combined with each other.

[0027] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. Therefore, the drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0028] The following embodiments of this application provide a relay switching power supply circuit and a relay device, which solve the problems of circuit instability, single function and high cost caused by the fact that the relay switch is limited by the fixed output voltage and cannot adapt to the rated voltage requirements of different relays in the prior art.

[0029] To address the aforementioned technical problems, this application proposes a relay switching power supply circuit and a relay device, which can achieve dynamic balance adjustment of the input and output voltages over a wide range, so that the output voltage of the circuit can better match the rated voltage requirements of the relay, thereby enabling better control of the relay's on / off state.

[0030] like Figure 1 and Figure 2 As shown, in a first aspect of this application, a relay switching power supply circuit is provided, the circuit comprising:

[0031] A step-down unit 1 is used to convert a wide range of input voltages into a stable low voltage output. A voltage regulation unit 2 is electrically connected to the step-down unit 1 and is used to regulate the voltage output of the step-down unit 1 so that the output voltage of the circuit is adapted to the rated voltage requirement of the relay. The voltage regulation unit 2 includes a feedback compensation unit 21, a first filter unit 22, and a voltage divider unit 23. The feedback compensation unit 21 is electrically connected to the first filter unit 22 and the voltage divider unit 23, respectively. The first filter unit 22 is electrically connected to the voltage divider unit 23.

[0032] This application achieves a wide voltage input function by setting a step-down unit 1, which can adapt to a wide range of input voltages, such as 4.5V-28.5V, greatly improving the applicability of the relay switch in different power supply environments. At the same time, the synergistic effect of the step-down unit 1 and the voltage regulation unit 2 realizes dynamic balance regulation of the output voltage, so as to better control the on and off state of the relay.

[0033] The high stability of the step-down unit 1 in this application prevents the coil from burning out due to overheating when the circuit is over-voltaged, and prevents arc damage due to unstable contact engagement when the circuit is under-voltaged, thereby reducing switch malfunctions or failures and improving circuit stability and reliability.

[0034] This application achieves dynamic balance regulation of the output voltage, so that the output voltage of the relay switching circuit is no longer limited to a fixed value. At the same time, it eliminates the need to configure multiple relay switches for different relay voltage requirements, thereby reducing equipment procurement costs and installation and maintenance costs and improving economic efficiency.

[0035] In one specific embodiment, the step-down unit 1 is an SGM6132. The SGM6132 can support a wide input range of 4.5V to 28.5V (with an ultimate withstand voltage of 31V).

[0036] The core function of the SGM6132 in this application is to convert a wide range of input voltages (e.g., 4.5V to 28.5V) into a stable low-voltage output (e.g., 0.8V to 22V), with a maximum output current of 3A and an efficiency of up to 91%. In relay switching circuits, it provides stable power support for relay drive modules (such as transistors, MOSFETs, or optocouplers), ensuring reliable operation of the relay coil under different load conditions. The output voltage value can be adjusted by changing the resistor value in the voltage divider unit.

[0037] In one specific embodiment, such as Figure 1 and Figure 2 As shown, the feedback compensation unit 21 includes a resistor R1 and a capacitor C1 connected in series. The resistor R1 is electrically connected to the first filter unit 22, and the capacitor C1 is electrically connected to the step-down unit 1.

[0038] This application achieves precise adaptation of the output voltage by setting a feedback compensation unit 21 to generate a compensation adjustment command based on the deviation between the feedback signal of the voltage divider unit 23 and the preset reference signal.

[0039] In one specific embodiment, such as Figure 1 and Figure 2 As shown, the first filter unit 22 includes a capacitor C2, and the voltage divider unit 23 includes a resistor R2 and a resistor R3 connected in series, with the capacitor C2 and the resistor R3 connected in parallel.

[0040] In this application, capacitor C2 can be selected from electrolytic capacitors and ceramic capacitors with appropriate capacitance and voltage rating, and inductor can be selected from power inductors with appropriate inductance values. Working together with the SGM6132 chip, it can further optimize the input voltage quality.

[0041] This application achieves filtering of the voltage across resistor R3 by setting a first filter unit 22 in parallel across resistor R3, thereby stabilizing circuit performance.

[0042] In one specific embodiment, such as Figure 1 and Figure 2 As shown, the voltage regulation unit 22 also includes a capacitor C3. The capacitor C3 is electrically connected to the step-down unit 1 through a first connection path, the capacitor C3 is electrically connected to the feedback compensation unit 21 through a second connection path, the capacitor C3 is electrically connected to the first filter unit 22 through a third connection path, the capacitor C3 is electrically connected to the voltage divider unit 23 through a fourth connection path, and the capacitor C3 is grounded through a fifth connection path.

[0043] When step-down unit 1 is powered on, the connected capacitor C3 is charged through the chip's internal constant current source. The capacitor voltage gradually rises from 0V until it reaches the internal reference voltage. At this point, the soft start is complete, and the output voltage begins to stabilize and regulate. The slope of the capacitor voltage rise is given by the formula... The decision is made, where t is the soft start time and V is the value of V. ref Here, C is the internal reference voltage, C3 is the capacitance value, and I is the constant current source inside the chip. By adjusting the capacitance value, the soft-start time can be controlled, thereby regulating the rise rate of the output voltage.

[0044] This application controls the charging and discharging process through capacitor C3, thereby controlling the rate of voltage change and achieving precise control of the software startup cycle.

[0045] In another exemplary embodiment, such as Figure 3 and Figure 4 As shown, the circuit also includes a second filter unit 3, which is electrically connected to the step-down unit 11 and is used to filter out high-frequency noise in the output voltage of the step-down unit 1.

[0046] Specifically, the second filter unit 3 includes a resistor R4, a capacitor C4 and an inductor L1 connected in series. One end of the resistor R4 is connected to the step-down unit 1, and the other end of the resistor R4 is connected to the capacitor C4. The inductor L1 is connected to the voltage regulation unit 2 and the voltage output terminal OUT.

[0047] The resistor R4, capacitor C4, and inductor L1 in this application can be connected in series to form a bandpass filter. The resistor R4 suppresses out-of-band noise and suppresses transient current caused by the charging and discharging of capacitor C4, thus avoiding voltage drops or oscillations. The capacitor C4 and inductor L1 can be selected to select the specific frequency signal required by the circuit.

[0048] This application provides a second filter unit at the output of the step-down unit 1 to perform high-frequency filtering on the output voltage of the step-down unit 1. This can prevent the relay contacts from generating high-frequency transient voltages and currents due to the disconnection of inductive loads or arc discharge at the moment of switching. It can also reduce problems such as false triggering and signal distortion caused by electromagnetic interference.

[0049] like Figure 2 and Figure 4 As shown, the circuit also includes diodes D1 and D2; the positive terminal of diode D1 is electrically connected to the second filter unit and the voltage regulation unit 22, respectively, and the negative terminal of diode D1 is electrically connected to the voltage output terminal OUT, for regulating the output voltage and suppressing reverse current; the positive terminal of diode D2 is grounded and electrically connected to the step-down unit 11, and the negative terminal of diode D2 is electrically connected to the step-down unit 11 and the second filter unit, respectively, for regulating the voltage output by the step-down unit 11.

[0050] This application uses two diodes to perform multi-stage voltage regulation of the circuit's output voltage, ensuring the stability and reliability of the circuit voltage.

[0051] like Figure 2 and Figure 4 As shown, the circuit also includes a capacitor C5, which is electrically connected to the step-down unit 11, the voltage input terminal IN, and ground, respectively, and is used to perform high-frequency filtering on the input voltage.

[0052] This application effectively protects the internal circuitry of the relay switch by setting up multi-stage voltage regulation and multi-stage filtering circuits, reducing the risk of equipment damage caused by voltage fluctuations and interference, and improving the reliability and stability of the circuit system.

[0053] Specifically, such as Figure 4 As shown, a relay switching power supply circuit is provided. In this circuit, the second pin of the SGM6132 is connected to the voltage input terminal IN and the capacitor C5; the third pin of the SGM6132 is connected to the negative terminal of diode D2, which is also connected to the end of inductor L1 away from the voltage output terminal OUT, and the positive terminal of diode D2 is grounded; the fourth and ninth pins of the SGM6132 are both grounded; the first pin of the SGM6132 is connected to resistor R4, which is connected in series with capacitor C4, inductor L1 to the positive terminal of diode D1, and the negative terminal of diode D1 is connected to the voltage output terminal OUT; the fifth pin of the SGM6132 is connected to resistor R2 to the positive terminal of diode D1 and resistor R3 to ground; the sixth pin of the SGM6132 is connected to capacitor C1, which is connected in series with resistor R1 to ground; the eighth pin of the SGM6132 is connected to capacitor C3, which is grounded; and capacitor C2 is connected in parallel across resistor R3.

[0054] This application achieves a wide voltage input function by setting up SGM6132, which can adapt to a wide range of input voltages, such as 4.5V-28.5V, greatly improving the applicability of the relay switch in different power supply environments. At the same time, through the synergistic effect of SGM6132, resistor R1, capacitor C1, capacitor C2, resistor R3, and resistor R2, dynamic balance adjustment of the output voltage is achieved, so as to better control the on and off state of the relay.

[0055] The high stability of the SGM6132 in this application prevents coil burnout due to overheating during overvoltage and arc damage due to unstable contact engagement during undervoltage, thereby reducing switch malfunctions or failures and improving circuit stability and reliability.

[0056] This application achieves dynamic balance regulation of the output voltage, so that the output voltage of the relay switching circuit is no longer limited to a fixed value. At the same time, it eliminates the need to configure multiple relay switches for different relay voltage requirements, thereby reducing equipment procurement costs and installation and maintenance costs and improving economic efficiency.

[0057] In a second aspect of this application, a relay device is also provided, the device including a relay (not shown) and a circuit provided in any of the above embodiments, the circuit being electrically connected to the relay, the circuit being configured to dynamically adjust the output voltage according to the rated voltage requirement of the relay to control the on / off state of the relay.

[0058] The relay switching power supply circuit provided by the above embodiments of this application can realize dynamic balance adjustment of the output voltage so that the output voltage of the circuit is adapted to the rated voltage requirement of the relay, thereby enabling better control of the on / off state of the relay.

[0059] The descriptions of the processes or structures corresponding to the above figures each have their own emphasis. For parts of a process or structure that are not described in detail, please refer to the relevant descriptions of other processes or structures.

[0060] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

Claims

1. A relay switching power supply circuit characterized by comprising: The circuit includes: A step-down unit, which converts a wide range of input voltages into a stable low-voltage output; A voltage regulation unit, electrically connected to the step-down unit, is used to regulate the voltage output by the step-down unit so that the output voltage of the circuit is adapted to the rated voltage requirement of the relay. The voltage regulation unit includes a feedback compensation unit, a first filter unit, and a voltage divider unit. The feedback compensation unit is electrically connected to the first filter unit and the voltage divider unit, respectively. The first filter unit is electrically connected to the voltage divider unit.

2. The circuit of claim 1, wherein, The step-down unit is an SGM6132.

3. The circuit of claim 2, wherein, The feedback compensation unit includes a resistor R1 and a capacitor C1 connected in series. The resistor R1 is electrically connected to the first filter unit, and the capacitor C1 is electrically connected to the step-down unit.

4. The circuit according to claim 3, characterized in that, The first filtering unit includes a capacitor C2, and the voltage divider unit includes a resistor R2 and a resistor R3 connected in series, with the capacitor C2 and the resistor R3 connected in parallel.

5. The circuit according to claim 1, characterized in that, The voltage regulation unit further includes a capacitor C3, which is electrically connected to the step-down unit through a first connection path, electrically connected to the feedback compensation unit through a second connection path, electrically connected to the first filter unit through a third connection path, electrically connected to the voltage divider unit through a fourth connection path, and grounded through a fifth connection path.

6. The circuit according to claim 1, characterized in that, The circuit also includes a second filtering unit, which is electrically connected to the step-down unit and is used to filter out high-frequency noise in the output voltage of the step-down unit.

7. The circuit according to claim 6, characterized in that, The second filtering unit includes a resistor R4, a capacitor C4, and an inductor L1 connected in series. One end of the resistor R4 is electrically connected to the step-down unit, and the other end of the resistor R4 is electrically connected to the capacitor C4. The inductor L1 is electrically connected to the voltage regulation unit and the voltage output terminal, respectively.

8. The circuit according to claim 6, characterized in that, The circuit also includes: diode D1 and diode D2; The positive terminal of diode D1 is electrically connected to the second filter unit and the voltage regulation unit, respectively, and the negative terminal of diode D1 is electrically connected to the voltage output terminal. The positive terminal of diode D2 is connected to ground and electrically connected to the step-down unit, and the negative terminal of diode D2 is electrically connected to the step-down unit and the second filter unit.

9. The circuit according to claim 1, characterized in that, The circuit also includes a capacitor C5, which is electrically connected to the step-down unit, the voltage input terminal, and ground.

10. A relay device, characterized in that, The device includes a relay and the circuit according to any one of claims 1 to 9, the circuit being electrically connected to the relay, and the circuit being configured to dynamically adjust the output voltage according to the required rated voltage of the relay to control the on / off state of the relay.

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