CN103052244A

CN103052244A - Domestic emergency fluorescent lamp

Info

Publication number: CN103052244A
Application number: CN2013100005477A
Authority: CN
Inventors: 丁希庆
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-01-04
Filing date: 2013-01-04
Publication date: 2013-04-17

Abstract

The invention provides a domestic emergency fluorescent lamp, consisting of a 6V direct current power source, a self-excitation oscillating circuit and a boosting and lighting circuit. The domestic emergency fluorescent lamp is characterized in that the selectively-used type of a power switch integrated circuit IC1 in the self-excitation oscillating circuit is TWH8751. Today, people depend on power supply more and more; once the power supply is interrupted, the normal work, the normal life and the normal student learning are affected greatly and even some losses are caused; the emergency fluorescent lamp is spare lighting equipment independent from the power grid; the common emergency lighting equipment mostly takes storage cells as a power source; the domestic emergency fluorescent lamp provided by the invention is applicable for use with the 6-8W fluorescent lamp in a matching way, and can satisfy requirement on emergency lighting during the temporary electricity interruption of supply lines; and additionally, the domestic emergency fluorescent lamp is also applicable for emergency lighting or firefighting emergency lighting in various small public sites.

Description

Family expenses emergency daylight lamp fixture

Technical field

The invention belongs to electronic technology and emergency lighting field, relate to a kind of family expenses emergency daylight lamp fixture.

Background technology

People are also more and more higher to the dependence of power supply now, in case power failure is brought very large impact will for normal work, life and Students ' Learning, even be caused some losses.Family expenses emergency daylight lamp fixture is the emergency lighting that is independent of outside the electrical network, emergency-lighting set commonly used mainly with storage battery as power supply.

Family expenses emergency daylight lamp fixture of the present invention is fit to adapted 6～8W fluorescent lamp, and it can tackle the requirement of supply lines short time emergency lighting when having a power failure, and also is applicable to emergency lighting or the fire emergency of various small-sized public places.

Below describe in force related correlation technique content of family expenses emergency daylight lamp fixture of the present invention in detail.

Summary of the invention

Goal of the invention and beneficial effect: people are more and more higher to the dependence of power supply now, in case power failure is brought very large impact will for normal work, life and Students ' Learning, even be caused some losses.The emergency fluorescent lamp is the emergency lighting that is independent of outside the electrical network, emergency-lighting set commonly used mainly with storage battery as power supply.Family expenses emergency daylight lamp fixture of the present invention is fit to adapted 6～8W fluorescent lamp, and it can tackle the requirement of supply lines short time emergency lighting when having a power failure, and also is applicable to emergency lighting or the fire emergency of various small-sized public places.

Technical scheme: family expenses emergency daylight lamp fixture, it by 6V DC power supply, self-maintained circuit, boost and lighting circuit forms, its feature comprises:

Self-maintained circuit: it is by power switch circuit IC1, resistance R 1, electric capacity of the dacron C2, the armature winding L1 of potentiometer RP and step-up transformer T forms, the model that power switch circuit IC1 selects is TWH8751, the 5th pin of power switch circuit IC1 is by the anodal VCC of resistance R 1 connection circuit, the 1st pin of power switch circuit IC1 connects the end of electric capacity of the dacron C2 and the end of potentiometer RP, the 3rd pin connection circuit ground GND of the other end of electric capacity of the dacron C2 and power switch circuit IC1, the 4th pin of power switch circuit IC1 connects the other end of potentiometer RP and the end of movable end and step-up transformer T armature winding L1 thereof, the anodal VCC of the other end connection circuit of step-up transformer T armature winding L1;

Boost and lighting circuit: it is comprised of boost winding L 2 and the fluorescent lamp RGD of step-up transformer T, the boost other end of winding L 2 of the boost termination circuit ground GND of an end of winding L 2 and fluorescent lamp RGD of step-up transformer T, step-up transformer T links to each other with the other end of fluorescent lamp RGD;

The 6V dc power anode links to each other with circuit anode VCC, and the 6V dc power cathode links to each other with circuit ground GND.

The circuit working principle: it is core parts that the circuit of family expenses emergency daylight lamp fixture adopts TWH8751 power switch circuit IC1; power switch circuit IC1 internal circuit is comprised of input stage, buffer amplifier and Darlington power stage; and be provided with feedback control loop and subtract the flow pattern output protection circuit, versatility is very strong.When the level of the 2nd pin gating end of power switch circuit IC1 〉=1.6V, the 1st pin input of power switch circuit IC1 to its 4th pin output without control action, that is: internal circuit final stage Darlington transistor cut-off, circuit no-output; The 2nd pin that only has power switch circuit IC1 be low level (＜1.2V) time, be added in the signal power ratio control switch integrated circuit IC1 output level effectively on the power switch circuit IC1 input.

Family expenses emergency daylight lamp fixture selects TWH8751 as the self-maintained circuit core parts, and its peripheral resistance R 1 is current-limiting resistance, and potentiometer RP, electric capacity of the dacron C2 are determining the circuit oscillation frequency, and electrochemical capacitor C1 is used for stablizing the voltage of 6V DC power supply.The vibration winding L 1 of oscillation step-up transformer is determining the height of oscillating voltage, the winding L 2 of boosting at oscillation step-up transformer can induce higher alternating voltage, thereby the conduction of the mercury vapour in the percussion fluorescent tube is pulled the trigger the light-emitting phosphor on the fluorescent lamp tube wall at last.

Description of drawings

Accompanying drawing 1 is the circuit working schematic diagram of family expenses emergency daylight lamp fixture; T is oscillation step-up transformer in the accompanying drawing 1.

Embodiment

Specification requirement according to the components and parts of the circuit working schematic diagram of the family expenses emergency daylight lamp fixture shown in the accompanying drawing 1 and description of drawings and the following stated is implemented, and can realize the present invention.

The selection of components and parts and technical parameter

IC1 is power switch circuit, the model of selecting is TWH8751, its packing forms is TOP-220, the required control electric current of TWH8751 input stage gating end is very little, 100～200 μ A only, buffer amplifier and Darlington power form output stage, and are provided with feedback control loop and subtract the flow pattern output protection circuit in inside; Power switch circuit IC1 has 5 pins, and pin function is respectively: input (IN), gating end (ST), circuit ground (GND), output (OUT) and positive source (VCC);

The resistance of resistance R 1 is that 680 Ω, power are 1/2W;

RP is potentiometer, and its resistance is 220K Ω;

C1 is electrochemical capacitor, and capacity is 470 μ F/16V;

C2 is electric capacity of the dacron, and capacity is 0.01 μ F;

RGD is fluorescent lamp, and optional is the fluorescent lamp of 6～8W with power;

DC power supply is selected 6V, 4AH storage battery, and DC power supply is also used 4 joint 1# manganese-zinc batteries when emergent.

Circuit production main points and circuit debugging

1. the making of step-up transformer T: magnetic core is selected U-shaped FERRITE CORE or ring type magnetic core, also available common EI type or FF type silicon steel sheet replace, but conversion efficiency will reduce, around 45 circles, the winding L of boosting 2 usefulness ￠ 0.12～0.15mm enamelled wire is around 1500 circles with ￠ 0.3～0.4mm enamelled wire for armature winding L1;

2. the circuit of family expenses emergency daylight lamp fixture is as long as the components and parts performance of using is intact, annexation according to components and parts shown in the accompanying drawing 1 is welded, the physics wiring is conscientiously checked and check errorless after, the circuit of this device need not debugged and can work;

3. adjustable potentiometer RP lever arm is spun on the centre position during circuit debugging, can makes fluorescent lamp RGD luminous after connecting the 6V DC power supply, adjust potentiometer RP the complete machine Current Control is got final product at 260mA～320mA;

4. use 4 joint 1# MnZn dry cells, family expenses emergency daylight lamp fixture lighting hours was greater than 90 minutes.When finding the phenomenons such as the fluorescent lamp appearance is dim, flicker, should be that the electric weight of 6V DC power supply is not enough, in time change dry cell, or in time storage battery be charged.

Claims

1. family expenses emergency daylight lamp fixture, it by 6V DC power supply, self-maintained circuit, boost and lighting circuit forms, its feature comprises:

Described self-maintained circuit is by power switch circuit IC1, resistance R 1, electric capacity of the dacron C2, the armature winding L1 of potentiometer RP and step-up transformer T forms, the model that power switch circuit IC1 selects is TWH8751, the 5th pin of power switch circuit IC1 is by the anodal VCC of resistance R 1 connection circuit, the 1st pin of power switch circuit IC1 connects the end of electric capacity of the dacron C2 and the end of potentiometer RP, the 3rd pin connection circuit ground GND of the other end of electric capacity of the dacron C2 and power switch circuit IC1, the 4th pin of power switch circuit IC1 connects the other end of potentiometer RP and the end of movable end and step-up transformer T armature winding L1 thereof, the anodal VCC of the other end connection circuit of step-up transformer T armature winding L1;

Described boost and lighting circuit is comprised of boost winding L 2 and the fluorescent lamp RGD of step-up transformer T, the boost other end of winding L 2 of the boost termination circuit ground GND of an end of winding L 2 and fluorescent lamp RGD of step-up transformer T, step-up transformer T links to each other with the other end of fluorescent lamp RGD;

Described 6V dc power anode links to each other with circuit anode VCC, and the 6V dc power cathode links to each other with circuit ground GND.