Single power supply voltage division isolation output circuit

Abstract

The utility model discloses a single power supply voltage-dividing isolation output circuit, which comprises a switching power supply, a fuse, a first filter capacitor, a second filter capacitor and a power supply group, the anode of the switching power supply is sequentially connected with a fuse, a first filter capacitor, a second filter capacitor and a plurality of power supply groups; the first filter capacitor and the second filter capacitor are connected with the cathode of the switching power supply; each power supply group comprises a plurality of power supply circuits, and each power supply circuit comprises a first divider resistor, a second divider resistor and a voltage stabilizing diode; the first divider resistor is connected with the positive electrode of the switching power supply and the second divider resistor, the second divider resistor and the positive electrode of the voltage stabilizing diode are grounded, and the negative electrode of the voltage stabilizing diode is connected between the first divider resistor and the second divider resistor and is connected with electric equipment. The circuit has the advantages that a plurality of mutually isolated channels are expanded through voltage stabilization of the voltage stabilizing circuit after voltage division by adopting the resistor, so that the change of each path of voltage does not influence the change of other branches, and the normal work of each branch is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic circuits, in particular to a single-power supply voltage-dividing isolation output circuit. Background Art

[0002] When using a single switching power supply to power multiple devices, if the output impedance of a branch circuit in the downstream stage is low after conduction, the voltage of other branches in the same parallel circuit will be reduced due to the equal voltage of the parallel circuit, causing the other branches to malfunction. The traditional solution may require multiple separate and isolated power supplies to power the devices, which not only takes up space but also wastes costs and resources. Utility Model Content

[0003] The purpose of the utility model is to provide a single power supply voltage division isolation output circuit, thereby solving the above-mentioned problems existing in the prior art.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A single-power supply voltage-dividing isolation output circuit includes a switching power supply, a fuse, a first filter capacitor, a second filter capacitor, a power supply group, and a connector terminal; the positive electrode of the switching power supply is sequentially connected to the fuse, the first filter capacitor, the second filter capacitor, and multiple power supply groups; the ends of the first filter capacitor and the second filter capacitor away from the switching power supply are both connected to the negative electrode of the switching power supply and grounded; the ends of the power supply group away from the switching power supply are connected to the electrical equipment;

[0006] Each power supply group includes multiple parallel power supply circuits, each of which includes a first voltage-dividing resistor, a second voltage-dividing resistor and a voltage-stabilizing diode; one end of the first voltage-dividing resistor is connected to the positive electrode of the switching power supply, the other end of the first voltage-dividing resistor is connected to one end of the second voltage-dividing resistor, and the other end of the second voltage-dividing resistor is grounded; the positive electrode of the voltage-stabilizing diode is grounded, and the negative electrode of the voltage-stabilizing diode is connected between the first voltage-dividing resistor and the second voltage-dividing resistor and is connected to the electrical equipment at that point.

[0007] Preferably, the power supply circuit further includes a working status indicator light, which is connected in series upstream of the first voltage-dividing resistor.

[0008] Preferably, the switching power supply is a 36V switching power supply.

[0009] Preferably, the voltage stabilizing diode is a 12V voltage stabilizing diode.

[0010] Preferably, the power supply group is connected to the power-consuming equipment via a connector terminal.

[0011] Preferably, the connection point between the cathode of the voltage-stabilizing diode and the first and second voltage-dividing resistors is connected to the electrical equipment via a connector terminal.

[0012] The beneficial effects of this utility model are as follows: 1. By using resistors to divide the voltage, followed by stabilization by a voltage stabilization circuit, multiple isolated channels are created, ensuring that voltage changes in one channel do not affect changes in other branches, thereby ensuring the normal operation of each branch. 2. It reduces the number of power modules required; theoretically, the number of branch voltage expansions should not exceed the maximum operating current of the power modules. Furthermore, it reduces installation space, reducing the need for compact installation space. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of the output circuit in the embodiment of the present utility model;

[0014] Figure 2 It is a specific structural diagram of the output circuit in the embodiment of the utility model. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0016] like Figure 1 As shown, in this embodiment, a single-power supply voltage-dividing isolation output circuit is provided, characterized in that: it includes a switching power supply DC1, a fuse F31, a first filter capacitor C1, a second filter capacitor C2, a power supply group, and a connector terminal; the positive electrode of the switching power supply is connected to the fuse, the first filter capacitor, the second filter capacitor, and multiple power supply groups in sequence, and the ends of the first filter capacitor and the second filter capacitor away from the switching power supply are connected to the negative electrode of the switching power supply and grounded; the end of the power supply group away from the switching power supply is connected to the electrical equipment;

[0017] Each power supply group includes multiple parallel power supply circuits, and the power supply circuit includes a working status indicator light ( Figure 1 LED1~LEDN in), the first voltage divider resistor ( Figure 1 F1~FX in), the second voltage divider resistor ( Figure 1 F2~FX+1) and Zener diode ( Figure 1D1~DN in it); one end of the working status indicator light is connected to the positive electrode of the switching power supply, the other end of the working status indicator light is connected to one end of the first voltage dividing resistor, the other end of the first voltage dividing resistor is connected to one end of the second voltage dividing resistor, and the other end of the second voltage dividing resistor is grounded; the positive electrode of the Zener diode is grounded, and the negative electrode of the Zener diode is connected between the first voltage dividing resistor and the second voltage dividing resistor and is connected to the electrical equipment at this point.

[0018] In this embodiment, the power supply group is connected to the power consumption device via a plug-in terminal. Specifically, the cathode of the voltage stabilizing diode and the connection point between the first voltage dividing resistor and the second voltage dividing resistor are connected to the power consumption device via a plug-in terminal.

[0019] like Figure 2 As shown, in this embodiment, the output circuit includes three power supply groups, each of which includes ten power supply circuits. LEDs 1 through 30 are circuit status indicators, indicating whether a circuit is powered. If powered, the lights illuminate; if not, it indicates a circuit anomaly. Resistors F1 through F61 are voltage dividers, providing voltage division. D1 through D30 are Zener diodes, stabilizing the voltage. The circuit shown above generates a 12V voltage after voltage division, so a 12V Zener diode is used. P1 through P3 are connector terminals. Connect the stabilized output voltage of the corresponding circuit to the corresponding terminal, depending on the actual situation, to provide a stable voltage to the electrical device.

[0020] The switching power supply DC1 in the output circuit provides a 36V supply. F31 is a fuse that trips when high current flows, protecting the downstream circuitry. C1 and C2 are filter capacitors, ensuring a more stable voltage at the downstream circuitry. The output circuit conserves power through voltage stabilization and voltage division. In the event of an unbalanced load, this does not affect the front-end switching power supply to other load circuits, thus reducing installation space and costs.

[0021] By adopting the above technical solution disclosed in the utility model, the following beneficial effects are obtained:

[0022] This utility model provides a single-power supply voltage-dividing, isolated output circuit. This circuit utilizes resistor-based voltage division, followed by voltage stabilization by a voltage-stabilizing circuit, to create multiple, isolated channels. This ensures that voltage changes in one channel do not affect changes in other branches, thus ensuring the proper functioning of each branch. This circuit design significantly reduces the number of power modules required; theoretically, the number of branch voltage expansions should not exceed the maximum operating current of the power module. It also reduces installation space, minimizing the need for compact installation space.

[0023] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A single-power supply voltage-dividing isolation output circuit, characterized in that: It includes a switching power supply, a fuse, a first filter capacitor, a second filter capacitor, a power supply group, and a connector terminal; the positive electrode of the switching power supply is connected to the fuse, the first filter capacitor, the second filter capacitor, and multiple power supply groups in sequence, and the ends of the first filter capacitor and the second filter capacitor away from the switching power supply are connected to the negative electrode of the switching power supply and grounded; the end of the power supply group away from the switching power supply is connected to the electrical equipment; Each power supply group includes multiple parallel power supply circuits, each of which includes a first voltage-dividing resistor, a second voltage-dividing resistor and a voltage-stabilizing diode; one end of the first voltage-dividing resistor is connected to the positive electrode of the switching power supply, the other end of the first voltage-dividing resistor is connected to one end of the second voltage-dividing resistor, and the other end of the second voltage-dividing resistor is grounded; the positive electrode of the voltage-stabilizing diode is grounded, and the negative electrode of the voltage-stabilizing diode is connected between the first voltage-dividing resistor and the second voltage-dividing resistor and is connected to the electrical equipment at that point.

2. The single-power supply voltage-dividing isolation output circuit according to claim 1, characterized in that: The power supply circuit further includes a working status indicator light, which is connected in series upstream of the first voltage-dividing resistor.

3. The single-power supply voltage-dividing isolation output circuit according to claim 1, characterized in that: The switching power supply is a 36V switching power supply.

4. The single-power supply voltage-dividing isolation output circuit according to claim 1, characterized in that: The voltage stabilizing diode is a 12V voltage stabilizing diode.

5. The single-power supply voltage-dividing isolation output circuit according to claim 1, characterized in that: The power supply group is connected to the power-consuming equipment via the connector terminals.

6. The single-power supply voltage-dividing isolation output circuit according to claim 5, characterized in that: The connection point between the cathode of the voltage stabilizing diode and the first voltage dividing resistor and the second voltage dividing resistor is connected to the electric device via a connector terminal.

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