CN219145015U

CN219145015U - Front-stage surge voltage suppression circuit of power supply system

Info

Publication number: CN219145015U
Application number: CN202222960377.4U
Authority: CN
Inventors: 刘伟; 彭涛; 贾万林; 纪红军; 吴晓宇; 袁钾光; 杨济铭
Original assignee: Anshan Zsen Electronic Technology Co ltd
Current assignee: Anshan Zsen Electronic Technology Co ltd
Priority date: 2022-11-08
Filing date: 2022-11-08
Publication date: 2023-06-06
Anticipated expiration: 2032-11-08

Abstract

The utility model provides a power supply system front-stage surge voltage suppression circuit, and relates to the technical field of power supply system front-stage. The utility model comprises a resistor R4, a diode D1, a triode Q2, a resistor R3, an optical coupler U1, a resistor R2 and a triode Q1, wherein the resistor R4 is connected with the triode Q2 in parallel, the triode Q2 is connected with the resistor R3 in series, and the output end of the optical coupler U1 is connected with the resistor R2 and the triode Q1 in sequence. The utility model uses the negative serial MOS tube 431 as a reference to perform the pre-voltage stabilizing function, prevents the high-voltage surge voltage from damaging the later-stage equipment, and greatly improves the reliability and the stability of the whole.

Description

Front-stage surge voltage suppression circuit of power supply system

Technical Field

The utility model relates to the technical field of a front stage of a power supply system, in particular to a front stage surge voltage suppression circuit of the power supply system.

Background

In a power supply system, an excessive surge voltage may exist at a certain moment, so that a rear-stage circuit is damaged, and the rear-stage equipment cannot work normally.

Disclosure of Invention

Aiming at the defects in the problems, the utility model provides a power supply system front-stage surge voltage suppression circuit which uses a negative-series MOS tube 431 as a reference to perform a pre-voltage stabilization function, so that the damage of high-voltage surge voltage to rear-stage equipment is prevented, and the overall reliability and stability are greatly improved.

In order to solve the above problems, the present utility model provides a power supply system front-stage surge voltage suppression circuit, which includes a resistor R4, a diode D1, a triode Q2, a resistor R3, an optocoupler U1, a resistor R2 and a triode Q1, wherein the resistor R4 is connected in parallel with the triode Q2, the triode Q2 is connected in series with the resistor R3, and an output end of the optocoupler U1 is sequentially connected with the resistor R2 and the triode Q1.

Preferably, the circuit further comprises a diode D1, wherein the cathode of the diode D1 is connected with the resistor R4, and the anode of the diode D1 is connected with the cathode of the input voltage.

Preferably, the capacitor C1 is further included, the positive electrode of the capacitor C1 is connected with the triode Q2, and the negative electrode of the capacitor C1 is connected with the negative electrode of the input voltage.

Preferably, the circuit further comprises a resistor R8, a resistor R6, a resistor R7 and a diode D2, wherein the cathode of the diode D2 is connected with the optical coupler U1, the anode of the diode D2 is connected with the cathode of the input voltage, the resistor R8, the resistor R6 and the resistor R7 are sequentially connected, and the voltage division of the resistor R8, the resistor R6 and the resistor R7 provides an output voltage division ratio for the diode D2.

Preferably, the optical coupler also comprises a resistor R5, and the resistor R5 is connected with the input end of the optical coupler U1.

Preferably, the transistor also comprises a resistor R1, wherein the resistor R1 is connected with the triode Q1 in parallel.

Compared with the prior art, the utility model has the following advantages:

the utility model uses the negative serial MOS tube 431 as a reference to perform the pre-voltage stabilizing function, prevents the high-voltage surge voltage from damaging the later-stage equipment, and greatly improves the reliability and the stability of the whole.

Drawings

Fig. 1 is a schematic structural view of an embodiment of the present utility model.

Detailed Description

The present utility model will be further described in detail with reference to the drawings and examples, which are not intended to limit the utility model, in order to make the objects, technical solutions and advantages of the present utility model more apparent.

As shown in fig. 1, the embodiment of the utility model includes a resistor R4, a diode D1, a triode Q2, a resistor R3, an optocoupler U1, a resistor R2, a triode Q1, a diode D1, a capacitor C1, a resistor R8, a resistor R6, a resistor R7, a diode D2, a resistor R5, and a resistor R1, wherein the resistor R4 is connected in parallel with the triode Q2, the triode Q2 is connected in series with the resistor R3, and an output end of the optocoupler U1 is connected with the resistor R2 and the triode Q1 in sequence. The negative electrode of the diode D1 is connected to the resistor R4, and the positive electrode of the diode D1 is connected to the negative electrode of the input voltage. The positive pole of electric capacity C1 is connected with triode Q2, and electric capacity C1's negative pole is connected with the negative pole of input voltage. The negative electrode of the diode D2 is connected with the optocoupler U1, the positive electrode of the diode D2 is connected with the negative electrode of the input voltage, the resistor R8, the resistor R6 and the resistor R7 are sequentially connected, and the resistor R5 is connected with the input end of the optocoupler U1. Resistor R1 is connected in parallel with transistor Q1.

In this embodiment, in the circuit, the resistor R4, the triode Q2, the diode D1, the capacitor C1, and the resistor R3 pre-stabilizing circuit voltage provides a stabilizing voltage for the optocoupler U1 and the triode Q1, the triode Q1 is a main power tube, the resistor R1 and the resistor R2 divide voltage to provide a conducting voltage for the triode Q1, the resistor R5 limits current for the optocoupler U1 and the diode D2, the resistor R8, the resistor R6, and the resistor R7 divide voltage to provide an adjusting output voltage division ratio for the diode D2, and when the input voltage exceeds a preset value, the resistor R8, the resistor R6, and the resistor R7 adjust the diode D2 to control the optocoupler U1 and the triode Q1 to stabilize voltage, thereby realizing the limitation of the surge voltage.

All electric components in the scheme are connected with an adaptive power supply through wires by a person skilled in the art, and an appropriate controller is selected according to actual conditions so as to meet control requirements, specific connection and control sequences, and the electric connection is completed by referring to the following working principles in the working sequence among the electric components, wherein the detailed connection means are known in the art, and the following main description of the working principles and processes is omitted from the description of electric control.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

In the description of the present specification, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the technical solutions of the present patent and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present patent application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present patent application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

In this specification, unless clearly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in this specification will be understood by those of ordinary skill in the art in view of the specific circumstances.

In this specification, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims

1. The utility model provides a power supply system front-stage surge voltage suppression circuit which characterized in that, including resistance R4, diode D1, triode Q2, resistance R3, optocoupler U1, resistance R2 and triode Q1, resistance R4 is parallelly connected with triode Q2, and triode Q2 is established ties with resistance R3, and optocoupler U1's output is connected with resistance R2 and triode Q1 in proper order.

2. The power supply system pre-stage surge voltage suppression circuit according to claim 1, further comprising a diode D1, wherein a cathode of the diode D1 is connected to the resistor R4, and an anode of the diode D1 is connected to a cathode of the input voltage.

3. The power supply system pre-stage surge voltage suppression circuit according to claim 2, further comprising a capacitor C1, wherein an anode of the capacitor C1 is connected to the transistor Q2, and a cathode of the capacitor C1 is connected to a cathode of the input voltage.

4. A power supply system pre-stage surge voltage suppression circuit according to claim 3, further comprising a resistor R8, a resistor R6, a resistor R7, and a diode D2, wherein a cathode of the diode D2 is connected to the optocoupler U1, an anode of the diode D2 is connected to a cathode of the input voltage, the resistor R8, the resistor R6, and the resistor R7 are sequentially connected, and the voltage division of the resistor R8, the resistor R6, and the resistor R7 provide an adjusted output voltage division ratio for the diode D2.

5. The power supply system pre-stage surge voltage suppression circuit according to claim 4, further comprising a resistor R5, wherein the resistor R5 is connected to the input of the optocoupler U1.

6. The power supply system pre-stage surge voltage suppression circuit according to claim 5, further comprising a resistor R1, wherein the resistor R1 is connected in parallel with the transistor Q1.