CN208112504U

CN208112504U - A kind of buffer starting device

Info

Publication number: CN208112504U
Application number: CN201820712689.4U
Authority: CN
Inventors: 杨明
Original assignee: Sichuan Ai Gebit Technology Co Ltd
Current assignee: Sichuan Ai Gebit Technology Co Ltd
Priority date: 2018-05-14
Filing date: 2018-05-14
Publication date: 2018-11-16
Anticipated expiration: 2028-05-14

Abstract

The utility model discloses a kind of buffer starting devices, including NTC thermistor, relay, field-effect tube and delay circuit, the NTC thermistor is electrically connected in appliance circuit, and the NTC thermistor is electrically connected with the contact of the relay, coil one end of the relay is electrically connected to a power source, the other end is electrically connected with the output end of the field-effect tube, and the control terminal of the field-effect tube is electrically connected with the delay circuit, and the input terminal of the delay circuit is electrically connected to a power source.A kind of buffer starting device provided by the utility model can play better protective effect in starting moment to high-power circuit.

Description

A kind of buffer starting device

Technical field

The utility model relates to a kind of buffer starting devices.

Background technique

High-power electric appliance starting instant starting currents are larger, in order to mitigate impact, NTC thermistor of generally connecting, still NTC thermistor must select high current low resistance, even if the high warming temperature of resistance value reduces, be also likely to burn, rise Less than good buffer function.

Utility model content

Technical problems based on background technology, the utility model proposes a kind of buffer starting devices.

The utility model proposes a kind of buffer starting device technique scheme it is as follows：

A kind of buffer starting device, which is characterized in that including NTC thermistor, relay, field-effect tube and delay electricity Road, the NTC thermistor are electrically connected in appliance circuit, and the NTC thermistor and the contact of the relay are electrically connected It connects, coil one end of the relay is electrically connected to a power source, and the other end is electrically connected with the output end of the field-effect tube, the field The control terminal of effect pipe is electrically connected with the delay circuit, and the input terminal of the delay circuit is electrically connected to a power source.

Optionally, the field-effect tube uses N-channel MOS pipe, the grid and the delay circuit of the N-channel MOS pipe Electrical connection, the source electrode ground connection of the N-channel MOS pipe, drain electrode are electrically connected with the coil of the relay.

Optionally, electrolytic capacitor is also electrically connected between the source electrode and drain electrode of the field-effect tube.

A kind of buffer starting device provided by the utility model can play preferably high-power circuit in starting moment Protective effect.

Detailed description of the invention

Fig. 1 is the utility model module diagram.

Fig. 2 is the utility model circuit diagram.

Specific embodiment

Combined with specific embodiments below the utility model is made further to explain.

Embodiment

Referring to Fig.1-2, a kind of buffer starting device proposed in the present embodiment, including NTC thermistor 1, relay 2, Field-effect tube 3 and delay circuit 5, the NTC thermistor 1 is electrically connected in appliance circuit, and the NTC thermistor 1 Be electrically connected with the contact K1 of the relay 2, coil one end of the relay 2 is electrically connected with power supply VCC, the other end with it is described The output end of field-effect tube 3 is electrically connected, and the control terminal of the field-effect tube 3 is electrically connected with the delay circuit 5, the delay electricity The input terminal on road 5 is electrically connected to a power source.Delay circuit 5 in the present embodiment is by first capacitor C1, the second electrolytic capacitor C2, third Capacitor C3 and the 6th resistance R6, the 7th resistance R7 composition.

In this embodiment scheme, the field-effect tube 3 uses N-channel MOS pipe Q1, the grid of the N-channel MOS pipe Q1 with The delay circuit 5 is electrically connected, and the source electrode ground connection of the N-channel MOS pipe Q1, drain electrode is electrically connected with the coil of the relay 2.

As the improvement of above-described embodiment scheme, electrolysis is also electrically connected between the source electrode and drain electrode of the field-effect tube 3 Capacitor 4.

The buffer starting device that above-described embodiment scheme provides, in starting moment, starting current passes through high value NTC temperature-sensitive Resistance 1 is electrically activated to high-power circuit preliminary filling, and high-current relay 2 is attracted after several seconds, gives big function by high power relay 2 The power supply of rate circuit, relay 2 continue to the function of current in shutdown moment, since coil has, high-voltage breakdown control in order to prevent The field-effect tube of relay processed, needs the source electrode and drain electrode parallel electrolytic capacitor C10 of scene effect pipe, and storage relay 2 turns off wink Between the charge that generates, guarantee that field-effect tube 3 will not be breakdown.

The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not It is confined to this, anyone skilled in the art is within the technical scope disclosed by the utility model, practical according to this Novel technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model Within enclosing.

Claims

1. a kind of buffer starting device, which is characterized in that including NTC thermistor, relay, field-effect tube and delay electricity Road, the NTC thermistor are electrically connected in appliance circuit, and the NTC thermistor and the contact of the relay are electrically connected It connects, coil one end of the relay is electrically connected to a power source, and the other end is electrically connected with the output end of the field-effect tube, the field The control terminal of effect pipe is electrically connected with the delay circuit, and the input terminal of the delay circuit is electrically connected to a power source.

2. a kind of buffer starting device according to claim 1, which is characterized in that the field-effect tube uses N-channel MOS Pipe, the grid of the N-channel MOS pipe are electrically connected with the delay circuit, the source electrode ground connection of the N-channel MOS pipe, drain electrode and institute State the coil electrical connection of relay.

3. a kind of buffer starting device according to claim 1, which is characterized in that the source electrode of the field-effect tube and drain electrode Between be also electrically connected with electrolytic capacitor.