CN2221797Y - Miniature special DC regulated power supply - Google Patents

Abstract

The utility model discloses a new miniature special DC regulated power supply, being composed of six capacitors, two resistors, a double bridge integrated rectifying circuit and a sensitive switch. The utility model has the advantages of simple manufacture, low power consumption, low cost, small size, light weight, great practicability, etc.

Description

Microminiature special DC stabilized voltage supply

The utility model relates to a kind of novel transformation rectifying power supply apparatus, the power supply conversion electric power of especially miniaturization aspect.

Present known transformer conversion electric power structure is by transformer, rectifier, microswitch and civil power step by step also crosstalk be connected.Primary powers up in the time of will inserting the 220V civil power, and the 20mA quiescent current is arranged simultaneously, and in inferior grade coupled output one low-voltage, connects rectifier bridge, output dc voltage, micro machine work when pressing microswitch.Microswitch resets, outage, and micromotor quits work.This transformer converting power source connects under the civil power situation for a long time, and 3-4W power attenuation is on average arranged.Power transformer iron core adds the primary and secondary coil, and volume is big, and is relatively heavier.

The purpose of this utility model provides a kind of microminiature power source special, and it meets the micromotor job requirement as the transformer converting power source.And can economize on electricity miniaturization.Light practicality.

The purpose of this utility model is achieved in that C in insulation booth ₁C ₂C ₃C ₄Four capacitances in series.C ₃And C ₅It is Capacitance parallel connection.At integrated rectification circuit DBR7N307 input end D ₂And D ₄Between a discharge resistance branch in parallel.Make each electric connection terminal insert respectively DBR7N307 input D ₁D ₂D ₃D ₄With common terminal D ₉DBR7N307 output terminal (positive pole) D ₅(negative pole) D ₆Filter capacitor C in parallel ₆, two ends also connect micromotor.

When pressing serial connection mains terminal microswitch, on four main series capacitance connection end points, each point-to-point transmission will form a magnitude of voltage that is lower than civil power, and under the effect of rectifying tube, this voltage is a pulsating dc voltage in DBR7N307, sets simultaneously and chooses C ₁And C ₂The capacitance terminal pulsating volage is exported a direct current voltage for micro machine work by the DBR7N307 rectifying and wave-filtering.When microswitch resets, cut off the power supply.Electric capacity is by resistance, and rectification circuit and micro machine discharge.RestPose.Reach operate as normal, do not have the purpose of electric energy loss when not working.

Owing to adopt such scheme, select capacitances in series dividing potential drop value, cooperate with integrated rectification circuit, simple in structure.It is light mobile to whip in the working site, saves dedicated transformer and power pack.Have and manufacture simply, save electric energy, the small volume and less weight practicality.

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is electronic bobbin winoler power supply architecture and the circuit diagram that uses at present.

Among Fig. 1: frame of broken lines is the transformer frequency response box.1 transformer.2U sections core.3 transformer secondary output coils.4 frame of broken lines are electronic coiling handle for tool box.5 microswitches.6 rectifier bridges.7 micromotors.

Fig. 2 is power supply architecture of the present utility model and circuit diagram.

Among Fig. 2: 5 microswitches, R resistance, C ₁C ₂C ₃C ₄Electrochemical capacitor, 7 micro machines, the integrated rectification circuit of DBR7N307, D ₁D ₂D ₃D ₄Integrated rectification circuit input end, D ₅D ₆Output.D ₉Common terminal.

Civil power one end is connected in series microswitch (5) a bit in Fig. 2, another point and C ₁Capacitance cathode and D ₁Be electrically connected C ₁Negative pole and C ₂Electric capacity negative pole and RD ₂Be electrically connected C ₂Positive pole and C ₃C ₅The positive pole of Capacitance parallel connection and D ₉Be electrically connected C ₃C ₅Negative pole and C in parallel ₄Electric capacity negative pole and D ₃Be electrically connected C ₄The other end and RD with civil power ₄Be electrically connected, by the integrated rectification circuit D of DBR7N307 ₅(positive pole) end and D ₆(negative pole) end output-parallel C ₆Filter capacitor is electrically connected with micro machine (7).One group of practical parameter index: C ₁Electric capacity equals C ₂Electric capacity respectively is 220 μ f/63V, C ₃Electric capacity equals C ₄Electric capacity respectively is 47 μ f/400V, C ₅Electric capacity 22 μ f/400V, C ₆Electric capacity 47 μ f/100V, integrated rectification circuit model DBR7N307,2A/400V, R resistance 500K Ω/0.5W.Will reliably contact when welding between said elements, pad will add insulating sleeve.

Claims (1)

1. A kind of microminiature special DC voltage-stabilized power supply is characterized in that: C in insulation booth ₁Capacitance cathode and D ₁Be electrically connected C ₁Negative pole and C ₂Electric capacity negative pole and RD ₂Be electrically connected C ₂Positive pole and C ₃C ₅The positive pole of Capacitance parallel connection and D ₉Be electrically connected C ₃C ₅Negative pole and C in parallel ₄Electric capacity negative pole and D ₃Be electrically connected C ₄The other end and the RD of positive pole and civil power ₄Be electrically connected, by the integrated rectification circuit D of DBR7N307 ₅Positive terminal D ₆Negative pole end output-parallel C ₆Filter capacitor is electrically connected with micro machine (7).

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