CN205829478U

CN205829478U - A kind of rectification filtering circuit with LED green indicating lamp

Info

Publication number: CN205829478U
Application number: CN201620777229.0U
Authority: CN
Inventors: 王展英; 胡方坤
Original assignee: Suzhou Bangtuo Electromechanical Science & Technology Co Ltd
Current assignee: Suzhou Bangtuo Electromechanical Science & Technology Co Ltd
Priority date: 2016-07-22
Filing date: 2016-07-22
Publication date: 2016-12-21
Anticipated expiration: 2026-07-22

Abstract

The utility model discloses a kind of rectification filtering circuit with LED green indicating lamp, including the rectification module being connected with alternating current power supply, rectification module output connects electric capacity C1 and electric capacity C2 and is filtered, it is characterized in that: being connected between positive pole and the ground of described electric capacity C1 has discharge loop, and described discharge loop is in series with LED.Resistance R33, R35 and LED DS3 of series connection is included on described discharge loop.Described electric capacity C1 is electrochemical capacitor, and C2 is corrective capacity；Described resistance R33=R35, rated power is much smaller than alternating current power supply input power.The discharge loop simple in construction that this utility model increases, increases cost hardly, serves the effect of electric discharge instruction.Being used to refer to main circuit when converter works normally work, when power is off, the electric discharge of instruction electric capacity is the most complete, and the dismounting for staff provides safe and reliable guarantee, it is to avoid because of the voltage on electric capacity, electric shock accidents occurs, causes damage.

Description

A kind of rectification filtering circuit with LED green indicating lamp

Technical field

This utility model relates to converter, particularly to a kind of rectification filtering circuit with LED green indicating lamp.

Background technology

Mostly use now the frequency transformation mode of AC-DC-AC in the middle of frequency conversion speed-adjusting system.In the industry and life In the most multiplex be three-phase AC380V or the alternating current of biphase AC220V voltage, after rectifying and wave-filtering, produce unidirectional current Pressure.In order to improve filter effect, reduce ripple, generally use bigger electric capacity as RC filter circuit.So break when device After electricity, the electricity on filter capacitor cannot discharge, and electric capacity two ends still exist higher voltage, when attaching/detaching apparatus, very Easily cause electric shock accidents.

Utility model content

This utility model purpose is: provide a kind of rectification filtering circuit with LED green indicating lamp, it is to avoid converter because of Voltage on electric capacity and there is electric shock accidents, cause damage.

The technical solution of the utility model is:

A kind of rectification filtering circuit with LED green indicating lamp, including the rectification module being connected with alternating current power supply, rectification Module output connects electric capacity C1 and electric capacity C2 and is filtered, it is characterised in that: it is connected between positive pole and the ground of described electric capacity C1 and has Discharge loop, described discharge loop is in series with LED.

Preferably, described discharge loop includes resistance R33, R35 and LED DS3 of series connection.

Preferably, described electric capacity C1 is electrochemical capacitor, and C2 is corrective capacity；Described resistance R33=R35, rated power is the least In alternating current power supply input power.

The utility model has the advantages that:

Compared with prior art, the discharge loop simple in construction that this utility model increases, increase cost hardly, serve The effect of electric discharge instruction.Being used to refer to main circuit when converter works normally work, when power is off, the electric discharge of instruction electric capacity is No complete, the dismounting for staff provides safe and reliable guarantee, it is to avoid because of the voltage on electric capacity, electric shock accidents occurs, Cause damage.

Accompanying drawing explanation

Below in conjunction with the accompanying drawings and this utility model is further described by embodiment:

Fig. 1 is the schematic diagram of the rectification filtering circuit with LED green indicating lamp described in the utility model.

Detailed description of the invention

As it is shown in figure 1, the rectification filtering circuit with LED green indicating lamp disclosed in this utility model, including with hand over Rectifier module D 25XB60 that stream power supply connects, rectification module output connects the school of electrochemical capacitor C1 and 0.1uF of 220uF/450V Positive electric capacity C2 is filtered, and the DC voltage obtaining DC310 carries out frequency transformation.This utility model is to add in this loop Discharge loop, is made up of R33, R35 and DS3 in Fig. 1.When there is no discharge loop, after power-off, on electric capacity C1 and C2 voltage without Method discharges, and will be chronically at electriferous state, and not only damage the electric capacity life-span, and further increase the danger of electric shock.This discharges back Road is when converter works, and as power supply indicator, LED luminescence explanation main circuit voltage is normal；LED does not works and major loop event is described Barrier.When power is off, if LED still has light, illustrate still to have on filter capacitor voltage；When LED knocks out, illustrate on filter capacitor Tension discharge complete.Only when LED knocks out, converter plant can be dismounted, otherwise may have Danger Electric shock risk.

The resistance of this utility model discharge loop is relatively big, the least less than 5mA, electricity at converter current during operation Heating in resistance is little, and such electric current accounting for 250W and above converter is the least.It addition, resistance is two power For 2W resistance, the space taking PCB is little.The main purpose of this discharge loop is to provide safety to protect to the dismounting after power-off Barrier.The resistance value ratio of the discharge resistance owing to selecting is relatively big, and the time of electric discharge can be long.Also has the side of other discharge loop Method, such as: with relay, during power-off, connect discharge loop, with the discharge loop etc. of audion composition.

Above-described embodiment only for technology of the present utility model design and feature are described, its object is to allow and is familiar with technique People will appreciate that content of the present utility model and implement according to this, protection domain of the present utility model can not be limited with this.All The modification that spirit according to this utility model main technical schemes is done, all should contain at protection domain of the present utility model Within.

Claims

1. with a rectification filtering circuit for LED green indicating lamp, including the rectification module being connected with alternating current power supply, rectification mould Block output connects electric capacity C1 and electric capacity C2 and is filtered, it is characterised in that: it is connected between positive pole and the ground of described electric capacity C1 and puts Electricity loop, described discharge loop is in series with LED.

Rectification filtering circuit the most according to claim 1, it is characterised in that: include the resistance of series connection on described discharge loop R33, R35 and LED DS3.

Rectification filtering circuit the most according to claim 2, it is characterised in that: described electric capacity C1 is electrochemical capacitor, and C2 is school Positive electric capacity；Described resistance R33=R35, rated power is much smaller than alternating current power supply input power.