CN218868107U

CN218868107U - Switch device with power supply peak signal suppression function

Info

Publication number: CN218868107U
Application number: CN202222544165.8U
Authority: CN
Inventors: 刘超; 徐海琴
Original assignee: Shanghai Aviation Electric Co Ltd
Current assignee: Shanghai Aviation Electric Co Ltd
Priority date: 2022-09-26
Filing date: 2022-09-26
Publication date: 2023-04-14
Anticipated expiration: 2032-09-26

Abstract

The utility model discloses a switching device who possesses power spike suppression function, include: the voltage reduction and stabilization absorption circuit comprises a voltage reduction and stabilization absorption module, a switch module, a solid-state relay and a differential mode inductor, wherein the voltage reduction and stabilization absorption module is used for carrying out voltage reduction to 5V on an aviation direct-current power supply 28V and playing a role in absorbing and filtering spike voltage, and the switch module is used for controlling the working state of the solid-state relay. The beneficial effects of the utility model reside in that: by using the switching device, the conduction radiation level of the CE107 product with the voltage of 28V can meet the limit requirement of GJB 151B.

Description

Switch device with power supply peak signal suppression function

Technical Field

The utility model relates to an airborne field, in particular, a switching device who possesses power peak signal suppression function.

Background

The idea of the IEC to establish the CE107 test item of the military products is to investigate whether the conduction emission of an AC/DC power line which is powered from the outside meets the limit value requirement of GJB 151B of a product with a switch. In a typical top-level document, the host will mostly require that the product pass the authentication test of the CE107, regardless of whether the product has a switch or not. At present, the current test situation is that a mechanical switch or a key switch is used for controlling the power on or off of a product, and because the switch is easy to generate contact discharge or switching noise in the switching-on or switching-off process, the passing rate of the product in CE107 is low, so that the difficulty of the identification test of the product is greatly increased. The switching device with the power supply spike signal suppression function has the advantages of good stability, good electromagnetic compatibility, low test cost and the like, and the switching device with the spike signal suppression function is used as a test switch of the CE107, so that the test is more efficient, the passing rate is higher, the electromagnetic compatibility is better, and the CE107 test of the military products can be changed to be efficient, convenient and stable.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem in the prior art and providing a novel switch device who possesses power peak signal suppression function.

In order to realize the purpose, the technical scheme of the utility model is as follows: a switching device with power supply spike suppression, comprising: the voltage reduction and stabilization absorption device comprises a voltage reduction and stabilization absorption module, a switch module, a solid-state relay module and a differential mode inductor, wherein the voltage reduction and stabilization absorption module is used for reducing voltage of an aviation direct-current power supply 28V to 5V and has the functions of absorbing and filtering spike voltage, and the switch module is used for controlling the working state of the solid-state relay.

As a preferred scheme of the switching device with the power spike suppression function, a first input end of the voltage-reducing and voltage-stabilizing absorption module is connected to an input phase of the aviation dc power supply, a second input end of the voltage-reducing and voltage-stabilizing absorption module is connected to a power supply loop phase of the aviation dc power supply, a first output end of the voltage-reducing and voltage-stabilizing absorption module is connected to a VCC end of the solid-state relay through the switching module, and the switching module is configured to selectively connect or disconnect the first output end of the voltage-reducing and voltage-stabilizing absorption module and the first input end VCC of the solid-state relay.

As a preferred scheme of the switching device with the power supply spike signal suppression function, the switching module is a toggle switch; preferably, the switch module is a single-pole two-position toggle switch.

As a preferable aspect of the switching device having the power spike suppression function, the step-down voltage stabilization absorption module includes: the integrated circuit LM2596 is a switching voltage regulator of a buck power management monolithic integrated circuit, the input of an aviation direct-current power supply is connected with the positive end of the diode D1, the negative end of the diode D1 is respectively connected with the first end of the capacitor C1, the first end of the capacitor C2 and the Vin end of the integrated circuit LM2596, the second end of the capacitor C2 is connected with the first end of the resistor R1, the On/Off end of the integrated circuit LM2596 is respectively connected with the second end of the resistor R1 and the first end of the resistor R2, the Out end of the integrated circuit LM2596 is respectively connected with the negative end of the diode D2 and the first end of the inductor L1, the second end of the inductor L1 is respectively connected with the feedback end of the integrated circuit, the first end of the capacitor C3 and the ground end, and the second end of the capacitor C1 is respectively connected with the second end of the resistor R2.

Compared with the prior art, the beneficial effects of the utility model reside in at least: by utilizing the switching device, the conduction radiation level of the CE107 28V direct current product can meet the requirement of the GJB 151B limit value, the rectification test time is reduced, the test cost is reduced, the structure is simple, the use is convenient, the reliability is high, and the electromagnetic compatibility is good.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of the voltage-reducing and voltage-stabilizing absorption module according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a solid-state relay module according to an embodiment of the present invention.

Fig. 4 is an external schematic view of an embodiment of the present invention.

Sequence numbers in the figure: 1. toggle switch 2, aluminum electrolytic capacitor 3.LM2596, common mode inductor 5, potentiometer 6, diode 7, solid state relay 8 and differential mode inductor.

Detailed Description

The present invention will be described in further detail with reference to the following drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

Referring to fig. 1 to 4, a switching device with power spike suppression is shown for testing of the aircraft electrical product CE 107.

The switching device includes: the voltage-reducing and voltage-stabilizing circuit comprises a voltage-reducing and voltage-stabilizing absorption module, a switch module, a solid-state relay and a differential mode inductor.

The voltage reduction and stabilization absorption module reduces the voltage of the aviation direct-current power supply 28V to 5V and plays a role in absorbing and filtering peak voltage.

The switch module is used for controlling the working state of the solid-state relay.

And the output end of the voltage reduction and stabilization absorption module provides 5V input control voltage for the solid-state relay.

And the first input end of the voltage-reducing and voltage-stabilizing absorption module is connected with the input phase of the aviation direct-current power supply. And the second input end of the voltage-reducing and voltage-stabilizing absorption module is connected with a power supply return line phase of the aviation direct-current power supply. In this embodiment, the aviation dc power supply is 28V.

And the first output end of the voltage reduction and stabilization absorption module is connected with the VCC end of the solid-state relay through the switch module. The switch module is used for selectively switching on or switching off the first output end of the voltage reduction and voltage stabilization absorption module and the first input end VCC of the solid-state relay. And the second output end of the voltage-reducing and voltage-stabilizing absorption module is connected with the second input end GND of the solid-state relay. In this embodiment, the switch module is a toggle switch. Preferably, the switch module is a single-pole two-position toggle switch.

And a first output end K1 of the solid-state relay is connected with an input phase of the aviation direct-current power supply through the differential mode inductor.

And a second output end K2 of the solid-state relay is used as an output end positive line of the switch device.

And the outgoing line of the power supply return line phase of the aviation direct-current power supply is used as the output end return line of the switching device.

The voltage reduction and stabilization absorption module comprises: integrated circuit LM2596, diodes D1 and D2, resistors R1 and R2, capacitors C1, C2 and C3 and inductor L1. The integrated circuit LM2596 is a switching voltage regulator of a buck power management monolithic integrated circuit. The input of the aviation direct current power supply is connected with the positive end of the diode D1. Diode D1 negative terminal meets respectively the first end of electric capacity C1, the first end of electric capacity C2, integrated circuit LM 2596's Vin end, electric capacity C2 second end meets the first end of resistance R1, integrated circuit LM 2596's On/Off end meets respectively resistance R1 second end, resistance R2 first end, integrated circuit LM 2596's Out end meets respectively diode D2 negative terminal, inductance L1 first end, inductance L1 second end meets respectively integrated circuit's feedback end, electric capacity C3 first end and ground, electric capacity C1 second end meets respectively resistance R2 second end. The absorption and the filtering of the peak voltage are completed by diodes D1 and D2, resistors R1 and R2, capacitors C1, C2 and C3, an inductor L1 and the differential mode inductor in the voltage reduction and voltage stabilization absorption module.

The solid-state relay is a novel non-contact switching device which is composed of solid-state electronic elements. The circuit is characterized in that the circuit is switched on and off without contact spark by utilizing the switching characteristics of electronic elements (such as a switching triode, a bidirectional thyristor and other semiconductor devices). The solid-state relay has two control modes of positive control and negative control, and the difference is the connection method of a control end power supply. In this embodiment, preferably, a positive control mode is as shown in fig. 3, GND is connected to a dc 28V bus return line, and contacts of the solid-state relays K1 and K2 are turned on or off by controlling on/off of a power supply of the VCC pin of the solid-state relay.

The foregoing is illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the invention in any way. Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto. The technical solution of the present invention can be applied to a plurality of possible variations and modifications, or modified equivalent embodiments, without departing from the scope of the technical solution of the present invention, by using the method and technical content disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A switching device having a power supply spike suppression function, comprising: the voltage reduction and stabilization absorption device comprises a voltage reduction and stabilization absorption module, a switch module, a solid-state relay module and a differential mode inductor, wherein the voltage reduction and stabilization absorption module is used for reducing voltage of an aviation direct-current power supply 28V to 5V and has the functions of absorbing and filtering spike voltage, and the switch module is used for controlling the working state of the solid-state relay.

2. The switch device with power spike suppression function according to claim 1, wherein the first input terminal of the buck-boost and voltage-stabilization absorber module is connected to the input phase of the aviation dc power supply, the second input terminal of the buck-boost and voltage-stabilization absorber module is connected to the power return phase of the aviation dc power supply, the first output terminal of the buck-boost and voltage-stabilization absorber module is connected to the VCC terminal of the solid-state relay through the switch module, and the switch module is configured to selectively connect or disconnect the first output terminal of the buck-boost and voltage-stabilization absorber module and the first input terminal VCC of the solid-state relay.

3. The switching device with power supply spike suppression function according to claim 1, wherein the switching module is a toggle switch.

4. The switching device with power supply spike suppression function according to claim 1, wherein the buck regulator absorption module comprises: the integrated circuit LM2596, the diodes D1 and D2, the resistors R1 and R2, the capacitors C1, C2 and C3 and the inductor L1, wherein the integrated circuit LM2596 is a switching voltage regulator of a buck power management monolithic integrated circuit, the input of an aviation direct current power supply is connected with the positive end of the diode D1, the negative end of the diode D1 is respectively connected with the first end of the capacitor C1, the first end of the capacitor C2 and the Vin end of the integrated circuit LM2596, the second end of the capacitor C2 is connected with the first end of the resistor R1, the On/Off end of the integrated circuit LM2596 is respectively connected with the second end of the resistor R1 and the first end of the resistor R2, the Out end of the integrated circuit LM2596 is respectively connected with the negative end of the diode D2 and the first end of the inductor L1, the second end of the inductor L1 is respectively connected with the second end of the integrated circuit, the first end of the capacitor C3 and the ground, and the second end of the capacitor C1 is respectively connected with the second end of the resistor R2.