CN218301223U

CN218301223U - Power supply high-frequency filtering isolation device

Info

Publication number: CN218301223U
Application number: CN202222230370.7U
Authority: CN
Inventors: 王猛; 王强
Original assignee: Zhongmi'an Chengdu Technology Co ltd
Current assignee: Zhongmi'an Chengdu Technology Co ltd
Priority date: 2022-08-24
Filing date: 2022-08-24
Publication date: 2023-01-13
Anticipated expiration: 2032-08-24

Abstract

The utility model discloses a high-frequency filtering and isolating device for a power supply, which comprises an outer shell, a wire inlet cavity arranged at the front end of the outer shell, a wire inlet terminal arranged in the wire inlet cavity, a wire outlet terminal arranged at the rear end of the outer shell, and a high-frequency filtering and isolating circuit arranged in the outer shell and connected with the wire inlet terminal and the wire outlet terminal; the high-frequency filtering isolation circuit comprises a first filtering circuit, a voltage stabilizing network and a compensation network; the first filter circuit is connected with the incoming line terminal and filters high-frequency signals; and the voltage stabilizing network is connected with the compensation network and is used for stabilizing voltage and compensating zero drift. By the proposal, the utility model has the advantages of structure, filtering keep apart reliably, have very high practical value and spreading value in power technical field.

Description

Power supply high-frequency filtering isolation device

Technical Field

The utility model belongs to the technical field of the power technology and specifically relates to a power high frequency filtering isolating device.

Background

The power filter is an electrical equipment which can effectively filter the frequency point of specific frequency or frequencies except the frequency point in the power line. The power filter is connected to the power line to obtain a power signal with a specific frequency or eliminate the power signal with the specific frequency. Since a large amount of high-frequency noise exists in the ac circuit, the high-frequency components in the power supply are filtered in the design of the power supply to avoid affecting subsequent devices. At present, a power filter in the prior art has the problems of voltage disturbance and the like after high-frequency filtering treatment.

Therefore, it is urgently needed to provide a high-frequency filtering and isolating device for a power supply, which has a simple structure and reliable filtering and isolating.

SUMMERY OF THE UTILITY MODEL

To the above problem, an object of the utility model is to provide a power high frequency filtering isolating device, the utility model discloses a technical scheme as follows:

a high-frequency filtering and isolating device for a power supply comprises an outer shell, a wire inlet cavity, a wire inlet terminal, a wire outlet terminal and a high-frequency filtering and isolating circuit, wherein the wire inlet cavity is formed in the front end of the outer shell, the wire inlet terminal is arranged in the wire inlet cavity, the wire outlet terminal is arranged at the rear end of the outer shell, and the high-frequency filtering and isolating circuit is arranged in the outer shell and is connected with the wire inlet terminal and the wire outlet terminal; the high-frequency filtering isolation circuit comprises a first filtering circuit, a voltage stabilizing network and a compensation network; the first filter circuit is connected with the incoming line terminal and filters high-frequency signals; and the voltage stabilizing network is connected with the compensation network and is used for stabilizing voltage and compensating zero drift.

Further, the output of the first filter circuit is connected with a voltage stabilizing network, and voltage disturbance suppression is performed.

Furthermore, the output of the first filter circuit is connected with a compensation network, and zero drift compensation is carried out.

Preferably, the voltage stabilizing network consists of a voltage stabilizing power device GV, a resistor R2 and a capacitor C5 which are connected in parallel.

Preferably, the compensation network consists of a capacitor C6 and a resistor R3 connected in series.

Further, the first filter circuit is an LC filter network; the inductor L1, the inductor L2, the capacitor C2, the resistor R1, the capacitor C3 and the capacitor C4 are included; the inductor L1 and the inductor L2 are arranged in parallel, and the input end of the inductor is connected with the incoming line terminal; the capacitor C2 and the resistor R1 are arranged in parallel; the capacitor C3 and the capacitor C4 are arranged in series; the capacitor C3 and the capacitor C4 are grounded.

Further, the capacitor C2 and the resistor R1 are connected in parallel and are arranged in one-to-one correspondence with the input ends of the inductor L1 and the inductor L2.

Preferably, the power supply high-frequency filtering isolation device further comprises an isolation network connected with the output of the voltage stabilizing network or the compensation network; the isolation network comprises an inductor L3, an inductor L4 and a capacitor C7; the inductor L3 and the inductor L4 are arranged in parallel; the capacitor C7 is connected between the outputs of the inductors L3 and L4.

Preferably, the front end of the outer shell is provided with a plurality of connecting holes.

Further, a capacitor C1 is connected between the inputs of the first filter circuit.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model skillfully sets the first filter circuit to filter high-frequency signals, and utilizes the voltage stabilizing network to suppress voltage disturbance, thereby ensuring the stable and reliable voltage after high-frequency filtering; then, a compensation network is used for zero drift compensation; the utility model discloses utilize the cooperation of steady voltage network and compensation network, guarantee that the filtering keeps apart reliably. To sum up, the utility model has the advantages of structure, filtering keep apart reliably, have very high practical value and spreading value in power technical field.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as a limitation of the scope of protection, and for those skilled in the art, other related drawings may be obtained from these drawings without inventive effort.

Fig. 1 is a schematic view of the appearance structure of the present invention.

Fig. 2 is a schematic diagram of a first high-frequency filter isolation circuit of the present invention.

Fig. 3 is a schematic diagram of a second high-frequency filter isolation circuit according to the present invention.

Fig. 4 is a schematic diagram of a third high-frequency filter isolation circuit of the present invention.

In the drawings, the names of the parts corresponding to the reference numerals are as follows:

1. an outer housing; 2. connecting holes; 3. a wire inlet cavity; 4. an incoming terminal; 5. and an outlet terminal.

Detailed Description

To make the objectives, technical solutions and advantages of the present application more clear, the present invention will be further described with reference to the accompanying drawings and examples, and embodiments of the present invention include, but are not limited to, the following examples. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Examples

As shown in fig. 1 to 4, the present embodiment provides a power supply high-frequency filtering isolation device, which includes an outer casing 1, a wire inlet cavity 3 provided at the front end of the outer casing 1, a plurality of connecting holes 2 provided at the front end of the outer casing 1, a wire inlet terminal 4 provided in the wire inlet cavity 3, a wire outlet terminal 5 provided at the rear end of the outer casing 1, and a high-frequency filtering isolation circuit provided in the outer casing 1 and connected to the wire inlet terminal 4 and the wire outlet terminal 5. In the present embodiment, it should be noted that the terms of "first", "second", and the like in the present embodiment are used only for distinguishing the same kind of components, and the scope of protection is not particularly limited. In the present embodiment, the terms of orientation such as "front end", "rear end", "peripheral edge", "center", and the like are explained based on the drawings. Moreover, the parameters of the electrical component of the embodiment are set in the prior art, and are set according to the frequency band of the high-frequency signal, which is a conventional calculation setting manner, and thus detailed description and specific parameters thereof are omitted here.

In a first mode, the high-frequency filtering isolation circuit comprises a first filtering circuit, a voltage stabilizing network, a compensation network and an isolation network which are connected in sequence. The first filter circuit is connected with the incoming line terminal 4 and filters out high-frequency signals; the output of the first filter circuit is connected with a voltage stabilizing network and carries out voltage disturbance suppression. The voltage stabilizing network is connected with the compensation network and used for stabilizing voltage and compensating zero drift.

Specifically, the input of the inductor L1 and the input of the inductor L2 are connected to the live line Lin and the neutral line Gin of the incoming line terminal 4, respectively, and a capacitor C2 and a resistor R1 connected in parallel are provided between the outputs of the inductor L1 and the inductor L2; in addition, in the present embodiment, a capacitor C3 and a capacitor C4 are provided, wherein the capacitor C3 and the capacitor C4 are grounded. In this way, the inductor L1 and the capacitor C3 form a high frequency filter network, and the inductor L2 and the capacitor C4 form a high frequency filter network. Thus, a high frequency filter circuit can be formed. In addition, in the present embodiment, a capacitor C1 is connected in parallel to the input terminals of the inductor L1 and the inductor L2.

In this embodiment, a voltage stabilizing network is disposed at the rear end of the first filter circuit, and the voltage stabilizing network is composed of a voltage stabilizing power unit GV, a resistor R2 and a capacitor C5 which are connected in parallel. The voltage stabilizing power device GV and the capacitor C5 are used for offsetting fluctuation of rising and voltage drop compensation so as to realize the voltage stabilizing function. In addition, in the present embodiment, the compensation network is used to perform zero drift compensation, and is composed of a capacitor C6 and a resistor R3 connected in series.

In this embodiment, the isolation network includes an inductor L3, an inductor L4, and a capacitor C7; the inductor L3 and the inductor L4 are arranged in parallel; the capacitor C7 is connected between the outputs of the inductors L3 and L4.

In a second way, the high-frequency filtering isolation circuit of this embodiment includes a first filtering circuit, a voltage stabilizing network, a compensation network, and an isolation network, which are connected in sequence. The first filter circuit is connected with the incoming line terminal 4 and filters high-frequency signals; the output of the first filter circuit is connected with a voltage stabilizing network and is used for suppressing voltage disturbance. The voltage stabilizing network is connected with the compensation network and performs voltage stabilization and zero drift compensation.

In the first filter circuit, the input of an inductor L1 and an inductor L2 are respectively connected with the live line Lin and the zero line Gin of the incoming line terminal 4, a capacitor C2 and a resistor R1 are connected in parallel between the input ends of the inductor L1 and the inductor L2, a capacitor C3 and a capacitor C4 are connected in series between the output ends of the inductor L1 and the inductor L2, and the capacitor C3 and the capacitor C4 are grounded, so that a high-frequency filter circuit can be formed.

Meanwhile, in the present embodiment, a voltage stabilizing network is disposed at the rear end of the first filter circuit, and the voltage stabilizing network is composed of a voltage stabilizing power unit GV, a resistor R2, and a capacitor C5, which are connected in parallel. The voltage stabilizing power device GV and the capacitor C5 are used for offsetting fluctuation of rising and voltage drop compensation so as to realize the voltage stabilizing function. In addition, in the present embodiment, the compensation network is used to perform zero drift compensation, and is composed of a capacitor C6 and a resistor R3 connected in series.

In a third way, the high-frequency filter isolation circuit of this embodiment includes a first filter circuit, a compensation network, a voltage stabilization network, and an isolation network, which are connected in sequence. Further, the first filter circuit adopts the following connection mode: the input of the inductor L1 and the input of the inductor L2 are respectively connected with the live wire Lin and the zero wire Gin of the incoming wire terminal 4, a capacitor C2 and a resistor R1 are connected between the input ends of the inductor L1 and the inductor L2 in parallel, a capacitor C3 and a capacitor C4 are connected between the output ends of the inductor L1 and the inductor L2 in series, and the capacitor C3 and the capacitor C4 are grounded, so that a high-frequency filter circuit can be formed.

In this embodiment, zero offset compensation may be performed on the filtered signal, and then voltage stabilization may be performed; the compensation network consists of a capacitor C6 and a resistor R3 connected in series. The voltage stabilizing network consists of a voltage stabilizing power device GV, a resistor R2 and a capacitor C5 which are connected in parallel. The voltage stabilizing power device GV and the capacitor C5 are used for offsetting fluctuation of rising and voltage drop compensation so as to realize the voltage stabilizing function.

Among the three modes, the third mode is more reliable, zero offset compensation is firstly carried out, reference voltage is guaranteed, and voltage stabilization is carried out on the basis, so that reliable filtering isolation is realized.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and is not a limitation to the protection scope of the present invention, but all adopt the design principle of the present invention, and the changes made by performing non-creative work on this basis, all should belong to the protection scope of the present invention.

Claims

1. A high-frequency filtering and isolating device for a power supply comprises an outer shell (1), a wire inlet cavity (3) arranged at the front end of the outer shell (1), a wire inlet terminal (4) arranged in the wire inlet cavity (3), and a wire outlet terminal (5) arranged at the rear end of the outer shell (1), and is characterized by further comprising a high-frequency filtering and isolating circuit which is arranged in the outer shell (1) and connected with the wire inlet terminal (4) and the wire outlet terminal (5); the high-frequency filtering isolation circuit comprises a first filtering circuit, a voltage stabilizing network and a compensation network; the first filter circuit is connected with the incoming line terminal (4) and filters out high-frequency signals; and the voltage stabilizing network is connected with the compensation network and is used for stabilizing voltage and compensating zero drift.

2. The high-frequency filtering and isolating device for the power supply according to claim 1, wherein the output of the first filter circuit is connected to a voltage stabilizing network for voltage disturbance suppression.

3. The high-frequency filtering and isolating device for power supply of claim 1, wherein the output of the first filter circuit is connected with the compensation network and performs zero drift compensation.

4. The high-frequency filtering and isolating device for the power supply according to claim 2 or 3, wherein the voltage stabilizing network is composed of a voltage stabilizing power GV, a resistor R2 and a capacitor C5 which are connected in parallel.

5. A high-frequency filtering and isolating device for power supply according to claim 2 or 3, wherein said compensation network is composed of a capacitor C6 and a resistor R3 connected in series.

6. The high-frequency filtering and isolating device for the power supply according to claim 1, wherein the first filter circuit is an LC filter network; the inductor L1, the inductor L2, the capacitor C2, the resistor R1, the capacitor C3 and the capacitor C4 are included; the inductor L1 and the inductor L2 are arranged in parallel, and the input of the inductor L1 and the input of the inductor L2 are connected with the incoming line terminal (4); the capacitor C2 and the resistor R1 are arranged in parallel; the capacitor C3 and the capacitor C4 are arranged in series; the capacitor C3 and the capacitor C4 are grounded.

7. The high-frequency filtering and isolating device for the power supply according to claim 6, wherein the capacitor C2 and the resistor R1 are connected in parallel and are arranged in one-to-one correspondence with the input ends of the inductor L1 and the inductor L2.

8. A high-frequency filtering and isolating device for a power supply according to claim 2 or 3, further comprising an isolating network connected to the output of the voltage stabilizing network or the compensating network; the isolation network comprises an inductor L3, an inductor L4 and a capacitor C7; the inductor L3 and the inductor L4 are arranged in parallel; the capacitor C7 is connected between the outputs of the inductors L3 and L4.

9. The high-frequency filtering and isolating device for the power supply as claimed in claim 1, wherein a plurality of connecting holes (2) are formed in the front end of the outer shell (1).

10. A high frequency filtering isolator for power supply according to claim 2, wherein a capacitor C1 is connected between the inputs of said first filter circuit.