CN202503454U

CN202503454U - Miniwatt emergency AC power supply

Info

Publication number: CN202503454U
Application number: CN2012201663766U
Authority: CN
Inventors: 黄宇嵩
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-04-19
Filing date: 2012-04-19
Publication date: 2012-10-24
Anticipated expiration: 2022-04-19

Abstract

The utility model discloses a miniwatt emergency AC power supply, composed of a 6V DC power supply, a transformer coupling LC oscillation circuit and frequency adjusting circuit, a boost circuit and a DC power supply indication circuit. Practice experiences indicate that when a power supply circuit is power off suddenly, a household emergency power supply is more real and feasible by taking a storage battery as the power supply and employing an inverter manufactured via an inverter technology. The miniwatt emergency AC power supply of the utility model is suitable for supporting the uses of the miniwatt household electrical appliances, such as fluorescent lamp, energy saving lamp, notebook computer, etc., can completely cope with the requirements, such as emergency illumination, etc., after the power supply circuit is power off for a short time, and is also suitable for the emergency illumination or fire-fighting emergency power supply of various miniature public places. The illumination time of the emergency power supply is greater than 30 minutes.

Description

The small-power alternating-current power supply of meeting an urgent need

Technical field

The utility model belongs to the application of electronic technology field, is about the emergent alternating-current power supply of a kind of small-power.

Background technology

Along with improving constantly of social development and people's daily life level, people are also increasingly high to the dependence of power supply, in case power failure brings very big influence or cause some losses for normal work, life and student's study.Emergency power supply is the stand-by power supply that is independent of outside the electrical network, and emergency power supply commonly used has three kinds: be independent of the generating set of normal mains supply, like diesel engine generator; Special supply line outside the regular link; Adopt the inverter of inversion transformation technique making as power supply with storage battery.Practical experience shows: supply line has a power failure suddenly, and the family expenses emergency power supply is more real feasible with the third mode.

The emergent alternating-current power supply of the described small-power of the utility model is fit to small-power household electrical appliance such as adapted fluorescent lamp, electricity-saving lamp, notebook computer; Can tackle the requirements such as emergency lighting after the supply lines short time has a power failure fully, also be applicable to the emergency lighting or the fire-fighting emergency power supply of various small-sized public places; This emergency power supply lighting hours was greater than 30 minutes.

Below specify the emergent alternating-current power supply of the described small-power of the utility model related relevant technologies content in implementation process.

The utility model content

Goal of the invention and beneficial effect: practical experience shows: supply line has a power failure suddenly, and the family expenses emergency power supply is more real feasible as the inverter mode that power supply adopts inversion transformation technique to make with storage battery.The emergent alternating-current power supply of the described small-power of the utility model is fit to small-power household electrical appliance such as adapted fluorescent lamp, electricity-saving lamp, notebook computer; Can tackle the requirements such as emergency lighting after the supply lines short time has a power failure fully, also be applicable to the emergency lighting or the fire-fighting emergency power supply of various small-sized public places; This emergency power supply lighting hours was greater than 30 minutes.

The circuit working principle: the emergent alternating-current power supply of small-power is formed Darlington by NPN transistor VT1, VT2, and the vibration winding L 1 of transformer T, feedback winding L 2 and capacitor C 1 constitute transformer coupled LC oscillating circuit.Linear potentiometer RP and resistance R 2 provide the offset operation electric current for oscillistor, and linear adjustment potentiometer RP can control the power output in the emergent source of electricity.The winding L of boosting 3 is responsible for output 220V alternating current.

Technical scheme: the small-power alternating-current power supply of meeting an urgent need, it is made up of 6V DC power supply, transformer coupled LC oscillating circuit and frequency regulating circuit, booster circuit and DC power supply indicating circuit, and its characteristic comprises:

Transformer coupled LC oscillating circuit and frequency regulating circuit thereof: vibration winding L 1, feedback winding L 2, linear potentiometer RP, resistance R 2 and capacitor C 1 by NPN transistor VT1, NPN transistor VT2, transformer T are formed; The end of the base stage connecting resistance R2 of NPN transistor VT1 and an end of capacitor C 1; The end of the other end wiring property potentiometer RP of resistance R 2; The anodal VCC of the other end of linear potentiometer RP and lever arm connection circuit thereof; The collector electrode of NPN transistor VT1 connects the collector electrode of NPN transistor VT2 and the vibration winding L 1 different name end of transformer T; The emitter of NPN transistor VT1 connects the base stage of NPN transistor VT2, the emitter connection circuit ground GND of NPN transistor VT2, the anodal VCC of vibration winding L 1 termination circuit of the same name of transformer T; The end of the same name of another termination feedback winding L 2 of capacitor C 1, the different name termination circuit ground GND of feedback winding L 2;

Booster circuit: winding L 3 two ends of boosting of transformer T are connected on the two ends of 220V supply socket CZ respectively.

The anodal VCC of connection circuit behind the anodal series electrical source switch SW of 6V DC power supply, the negative pole of 6V DC power supply links to each other with circuit ground GND.

Description of drawings

Accompanying drawing 1 is the embodiment circuit working schematic diagram that the utility model provides the emergent alternating-current power supply of a small-power; Pore in the accompanying drawing 1 on the transformer T winding is expressed as end of the same name.

Embodiment

Circuit working schematic diagram and description of drawings according to the emergent alternating-current power supply of small-power shown in the accompanying drawing 1; And according to the annexation between the components and parts in the said circuit of utility model content, and the components and parts technical parameter described in the execution mode requires to implement to realize the utility model.

The selection of components and parts and technical parameter

VT1 is a NPN transistor, and the model of selecting for use is a power transistor in the NPN types such as 2SC9013;

VT2 is a NPN type high power transistor, and selecting model for use is 3DD59A, β >=80;

LED selects ￠ 5 red light emitting diodes for use;

Resistance R 1, resistance R 2 are selected the metalfilmresistor of 1/4W for use, and resistance is 1K Ω;

RP is a linear potentiometer, and resistance is 510 Ω; C1 is an electric capacity of the dacron, and capacity is 0.22 μ F/50V;

SW is a mains switch, selects single-pole single-throw switch (SPST) for use; CZ is the 220V supply socket;

The DC DC current source is selected 6V, 7AH maintenance free cell for use.

Circuit production main points, circuit debugging and the use of the emergent alternating-current power supply of small-power

The making of transformer T: the magnetic core of transformer T is selected U type ferrite magnetic core or ring type magnetic core for use; Also available common E type or F type silicon steel sheet replace, but conversion efficiency will reduce, and vibration winding L 1, feedback winding L 2 are all selected the enamelled wire of ￠ 0.9mm for use; The coiling number of turns is respectively 45 circles, 30 circles; The winding L of boosting 3 is selected the enamelled wire of ￠ 0.67mm for use, and the coiling number of turns is 800 circles, and winding frame can use the thick hardboard of 1mm to make; Elementary winding and secondary boosting will add one deck insulation film between the winding, and note the end sign of the same name of two groups of primary coils;

As long as components and parts are good, welded and installed is errorless, in 220V supply socket CZ, connect the load of 80W after, can carry out circuit debugging, can hear slight frizzle after the energising, this explanation circuit starting of oscillation;

Linear adjustment potentiometer RP can control the power output of emergency power supply.If not starting of oscillation of circuit possibly be that the polarity of feedback winding L 2 has connect instead, can be with trying it again after vibration winding L 1 or 2 reversal connections of feedback winding L;

The capacity of capacitor C 1 can change the frequency of oscillation of circuit; The capacity of capacitor C 1 is more little; The frequency of oscillation of circuit is just high more; The frequency of oscillation that suitably improves alternating current emergency power supply circuit helps improving the conversion efficiency of emergency power supply, but frequency of oscillation should≤60Hz, otherwise might influence the safe in utilization of some electrical equipment;

The utility model is not provided with unloaded pressure limiting function, so its output voltage generally is higher than 250V when zero load;

The alternating current of emergency power supply output can be supplied power to the following power consumption equipment of 100W temporarily;

When finding phenomenons such as the lighting appearance is dim, flicker, should be that the electric weight of storage battery is not enough, in time charge to storage battery.

Claims

1. the emergent alternating-current power supply of a small-power, it is made up of 6V DC power supply, transformer coupled LC oscillating circuit and frequency regulating circuit, booster circuit and DC power supply indicating circuit, and its characteristic comprises:

Transformer coupled LC oscillating circuit and frequency regulating circuit thereof are made up of vibration winding L 1, feedback winding L 2, linear potentiometer RP, resistance R 2 and the capacitor C 1 of NPN transistor VT1, NPN transistor VT2, transformer T; The end of the base stage connecting resistance R2 of NPN transistor VT1 and an end of capacitor C 1; The end of the other end wiring property potentiometer RP of resistance R 2; The anodal VCC of the other end of linear potentiometer RP and lever arm connection circuit thereof; The collector electrode of NPN transistor VT1 connects the collector electrode of NPN transistor VT2 and the vibration winding L 1 different name end of transformer T; The emitter of NPN transistor VT1 connects the base stage of NPN transistor VT2, the emitter connection circuit ground GND of NPN transistor VT2, the anodal VCC of vibration winding L 1 termination circuit of the same name of transformer T; The end of the same name of another termination feedback winding L 2 of capacitor C 1, the different name termination circuit ground GND of feedback winding L 2;

Winding L 3 two ends of boosting of transformer T are connected on the two ends of 220V supply socket CZ respectively in the booster circuit.

2. the small-power according to claim 1 alternating-current power supply of meeting an urgent need is characterized in that: the anodal VCC of connection circuit behind the anodal series electrical source switch SW of 6V DC power supply, the negative pole of 6V DC power supply links to each other with circuit ground GND.