Power supply voltage stabilization control module for electrical equipment

Abstract

The utility model relates to the technical field of temperature monitoring, in particular to a power supply voltage stabilization control module for electrical equipment, which comprises a primary step-down circuit, a secondary step-down circuit and a differential amplification acquisition circuit. The primary step-down circuit comprises a voltage conversion unit U1, a protection diode T1, a fuse F1, capacitors C1, C2, C3 and C4 and an inductor L1; the secondary step-down circuit comprises a voltage conversion unit U2, capacitors C5, C6, C7 and C8 and an inductor L2; according to the utility model, the primary step-down circuit and the secondary step-down circuit are arranged to carry out step-down processing on the output voltage, and the output voltage is enabled to be more stable through the arrangement of the protection diode, the plurality of capacitors and the plurality of inductors on the primary step-down circuit and the secondary step-down circuit; through the arrangement of the differential amplification acquisition circuit, voltage exceeding 10V can be filtered out to protect a post-stage circuit.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature monitoring, in particular to a power supply voltage stabilization control module for electrical equipment. Background Art

[0002] During operation, the output voltage supplied by the power supply end of electrical equipment is 220V mains voltage, which is then converted into a reference voltage suitable for the various components inside the electrical equipment through a voltage converter. This process generally requires the installation of a step-down module. However, the step-down module inside the current electrical equipment does not perform targeted voltage differentiation during execution, resulting in unstable voltage output and thus failing to provide protection. For example, if the voltage is too high, it will damage the components. In view of this, we propose a power supply voltage stabilization control module for electrical equipment. Utility Model Content

[0003] The main purpose of the utility model is to provide a power supply voltage stabilization control module for electrical equipment, comprising: a primary step-down circuit, a secondary step-down circuit and a differential amplifier acquisition circuit;

[0004] The first-stage step-down circuit includes a voltage conversion unit U1, a protection diode T1, a fuse F1, capacitors C1, C2, C3, C4, and an inductor L1;

[0005] The secondary step-down circuit includes a voltage conversion unit U2, capacitors C5, C6, C7, C8, and inductor L2;

[0006] The differential amplifier acquisition circuit includes dual-channel operational amplifiers U3A, U3B, resistors R1, R2, R3, R4, R5, capacitors C9, C10, C11, C12, C13, and a protection diode D1.

[0007] Preferably, the fuse F1 is connected to the pin 2 of the voltage conversion unit U1 , and the protection diode T1 and the capacitor C4 are connected in parallel to the pins 2 and 1 of the voltage conversion unit U1 .

[0008] Preferably, the inductor L1 is connected to the pin 6 of the voltage conversion unit U1 , and the capacitors C1 , C2 , and C3 are connected in parallel and connected to the pins 6 and 7 of the voltage conversion unit U1 .

[0009] Preferably, capacitor C8 is connected to pins 2 and 1 of the voltage conversion unit U2, inductor L1 is connected to pin 6 of the voltage conversion unit U2, and capacitors C5, C6, and C7 are connected in parallel to pins 6 and 7 of the voltage conversion unit U2.

[0010] Preferably, resistors R1 and R2 are both connected to pin 6 of the dual-channel operational amplifier U3B, the other end of resistor R1 is grounded, and capacitors C9 and C10 are connected in parallel with one end connected to the IN2- terminal of the dual-channel operational amplifier U3B and the other end is grounded.

[0011] Preferably, resistor R5 is connected to pin 5 of the dual-channel operational amplifier U3B, resistor R4 is connected to pin 7 and pin 5 of the dual-channel operational amplifier U3B, and capacitors C11 and C12 are connected in parallel with one end connected to the IN2+ end of the dual-channel operational amplifier U3B and the other end is grounded.

[0012] Preferably, pin 7 of the dual-channel operational amplifier U3B is connected to pin 2 of the dual-channel operational amplifier U3A, and capacitor C13 and protection diode D1 are connected in parallel and in series with resistor R3 before being connected to pin 1 of the dual-channel operational amplifier U3A.

[0013] Preferably, pin 6 and pin 7 of the voltage conversion unit U1 are connected to pin 2 and pin 1 of the voltage conversion unit U2 , and pin 6 and pin 7 of the voltage conversion unit U2 are connected to resistor R2 and resistor R5 , respectively.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The utility model steps down the output voltage by setting up a primary step-down circuit and a secondary step-down circuit, and makes the output voltage more stable by setting up protection diodes and multiple capacitors and inductors thereon; and by setting up a differential amplification and acquisition circuit, it can filter out voltages exceeding 10V to protect the subsequent circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of a first-stage step-down circuit of the utility model;

[0017] Figure 2 This is a schematic diagram of the first-stage step-down circuit of the utility model;

[0018] Figure 3 This is a schematic diagram of the differential amplifier acquisition circuit of the utility model;. DETAILED DESCRIPTION

[0019] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the following is a detailed description of the specific implementation method, structure, characteristics and effects of the present invention in combination with the accompanying drawings and preferred embodiments.

[0020] See also Figures 1 to 3 , this embodiment provides a power supply voltage stabilization control module for electrical equipment, comprising: a primary buck circuit, a secondary buck circuit and a differential amplifier acquisition circuit;

[0021] The first-stage step-down circuit includes a voltage conversion unit U1, a protection diode T1, a fuse F1, capacitors C1, C2, C3, C4, and an inductor L1;

[0022] The secondary step-down circuit includes a voltage conversion unit U2, capacitors C5, C6, C7, C8, and inductor L2;

[0023] The differential amplifier acquisition circuit includes dual-channel operational amplifiers U3A, U3B, resistors R1, R2, R3, R4, R5, capacitors C9, C10, C11, C12, C13, and a protection diode D1.

[0024] Preferably, the fuse F1 is connected to the pin 2 of the voltage conversion unit U1 , and the protection diode T1 and the capacitor C4 are connected in parallel to the pins 2 and 1 of the voltage conversion unit U1 .

[0025] Preferably, the inductor L1 is connected to the pin 6 of the voltage conversion unit U1 , and the capacitors C1 , C2 , and C3 are connected in parallel and connected to the pins 6 and 7 of the voltage conversion unit U1 .

[0026] Preferably, capacitor C8 is connected to pins 2 and 1 of the voltage conversion unit U2, inductor L1 is connected to pin 6 of the voltage conversion unit U2, and capacitors C5, C6, and C7 are connected in parallel to pins 6 and 7 of the voltage conversion unit U2.

[0027] Preferably, resistors R1 and R2 are both connected to pin 6 of the dual-channel operational amplifier U3B, the other end of resistor R1 is grounded, and capacitors C9 and C10 are connected in parallel with one end connected to the IN2- terminal of the dual-channel operational amplifier U3B and the other end is grounded.

[0028] Preferably, resistor R5 is connected to pin 5 of the dual-channel operational amplifier U3B, resistor R4 is connected to pin 7 and pin 5 of the dual-channel operational amplifier U3B, and capacitors C11 and C12 are connected in parallel with one end connected to the IN2+ end of the dual-channel operational amplifier U3B and the other end is grounded.

[0029] Preferably, pin 7 of the dual-channel operational amplifier U3B is connected to pin 2 of the dual-channel operational amplifier U3A, and capacitor C13 and protection diode D1 are connected in parallel and in series with resistor R3 before being connected to pin 1 of the dual-channel operational amplifier U3A.

[0030] Preferably, pin 6 and pin 7 of the voltage conversion unit U1 are connected to pin 2 and pin 1 of the voltage conversion unit U2 , and pin 6 and pin 7 of the voltage conversion unit U2 are connected to resistor R2 and resistor R5 , respectively.

[0031] During specific operation, the voltage conversion unit U1 converts the output voltage from 24V to 12V, F1 is a fuse to prevent excessive loop current, and the protection diode T1 can filter out voltages exceeding 30V, playing a protective role. Capacitor C4 is a pre-charge capacitor to make the voltage entering the voltage conversion unit U1 more stable; capacitor C1, inductor L1, and capacitor C2 form a Π-type filter to filter out noise from the power supply output. Capacitor C3 is the output capacitor to make the output voltage more stable; the voltage conversion unit U2 further converts the output voltage from 12V to 5V, and capacitor C8 is a pre-charge capacitor with the same function as capacitor C4. Capacitor C5 and inductor L2 and capacitor C6 form a π-type filter to filter out the noise output by the power supply. Capacitor C7 is an output capacitor and has the same function as capacitor C3. The dual-channel operational amplifier U3B amplifies through the external resistor ratio, and the amplification factor is R1 / R2. In this embodiment, R1 / R2=2, that is, twice. The dual-channel operational amplifier U3A is a voltage follower. In order to make the output of the dual-channel operational amplifier U3A more stable, capacitors C9, C10, C11, and C12 are filter capacitors. Resistor R3 and capacitor C13 form a first-order RC filter. The protection diode D1 filters out voltages exceeding 10V to protect the subsequent circuit.

[0032] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A power supply voltage stabilization control module for electrical equipment, characterized in that: include: A primary step-down circuit, a secondary step-down circuit and a differential amplifier acquisition circuit; The first-stage step-down circuit includes a voltage conversion unit U1, a protection diode T1, a fuse F1, capacitors C1, C2, C3, C4, and an inductor L1; The secondary step-down circuit includes a voltage conversion unit U2, capacitors C5, C6, C7, C8, and inductor L2; The differential amplifier acquisition circuit includes dual-channel operational amplifiers U3A and U3B, resistors R1, R2, R3, R4, R5, capacitors C9, C10, C11, C12, C13, and a protection diode D1; Fuse F1 is connected to pin 2 of voltage conversion unit U1, protection diode T1 and capacitor C4 are connected in parallel and then connected to pin 2 and pin 1 of voltage conversion unit U1; inductor L1 is connected to pin 6 of voltage conversion unit U1, capacitors C1, C2, and C3 are connected in parallel and then connected to pin 6 and pin 7 of voltage conversion unit U1; capacitor C8 is connected to pin 2 and pin 1 of voltage conversion unit U2, inductor L1 is connected to pin 6 of voltage conversion unit U2, capacitors C5, C6, and C7 are connected in parallel and then connected to pin 6 and pin 7 of voltage conversion unit U2; resistors R1 and R2 are both connected to pin 6 of dual-channel operational amplifier U3B, the other end of resistor R1 is grounded, and one end of capacitors C9 and C10 is connected in parallel and then connected to IN of dual-channel operational amplifier U3B. 2-terminal, the other end is grounded; resistor R5 is connected to pin 5 of the dual-channel operational amplifier U3B, resistor R4 is connected to pin 7 and pin 5 of the dual-channel operational amplifier U3B, capacitors C11 and C12 are connected in parallel and one end is connected to the IN2+ terminal of the dual-channel operational amplifier U3B, and the other end is grounded; pin 7 of the dual-channel operational amplifier U3B is connected to pin 2 of the dual-channel operational amplifier U3A, capacitor C13 and protection diode D1 are connected in parallel and then connected in series with resistor R3 and then connected to pin 1 of the dual-channel operational amplifier U3A; pin 6 and pin 7 of the voltage conversion unit U1 are connected to pin 2 and pin 1 of the voltage conversion unit U2, and pin 6 and pin 7 of the voltage conversion unit U2 are connected to resistor R2 and resistor R5 respectively.

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