CN2106472U - Capacitor mouth full wave ballast - Google Patents

Abstract

The utility model discloses a capacitor mouth full wave ballast, which belongs to the technical field of household appliances. The utility model can be used for the starting and the current limit of various florescent lamps. The utility model is characterized in that a full wave voltage doubling rectifier is connected in series with an AC capacitor; the double actions of the starting and the current limit of florescent lamps can be realized; the florescent lamp can be started without big surge current, and the service life of the florescent lamp can be prolonged. The utility model has the advantages of low cost, high reliability, less power consumption, fast starting, small size, and small weight. The utility model can improve the power factor of the circuit of power supply.

Description

Capacitor mouth full wave ballast

This utility model belongs to household appliance technical field, is used for the starter and the current limliting of all kinds of fluorescent lamps.

Prior art is the ballast that inland river, Sichuan electrical apparatus factory of optoelectronics industry company produces.The measure of surge current without limits when build-up of luminance on the one hand of this ballast, this just has a strong impact on the useful life of fluorescent tube.On the other hand will be with two anti-250 volts of voltages, the AC capacitor current limliting of capacity more than μ f, this has just increased manufacturing cost.

The objective of the invention is to release a kind of energy-conservation, durable, make fluorescent lamp long-life work and ballast with low cost to society.

Design of the present invention is as follows:

Electric capacity all-wave ballast is to adopt six semiconductor diodes to become full-wave voltage doubler and AC capacitor to be in series with four capacitance group and constitute.Realize the double action of high pressure starter and fluorescent lamp ballasting simultaneously.Fluorescent lamp lamp tube ends before build-up of luminance is that high pressure reaches kilovolt; Behind the fluorescent lamp build-up of luminance, its about 40 volts of voltage of under low pressure full-wave rectification loop, working.Operating current is by the ac capacitor restriction of serial connection.Add a concrete explanation below in conjunction with accompanying drawing: accompanying drawing 1 is the external form figure of this utility model electric capacity all-wave ballast, and wherein A, B are inputs; C, D are outputs; E is a shell; F is a core; G is a detection window.Accompanying drawing 2 is theory diagrams of this utility model.Accompanying drawing 3 is the circuit diagram of this utility model core, and wherein label 1 is AC capacitor, withstand voltage 250 volts, and capacitance is 2-5 μ f, and label 2 is an electrolytic capacitor, and its capacitance is big (about 2-5 μ f).3,4,5 is withstand voltage 600 volts, the small capacitor of the about 3000pf of capacitance.6 can select 1/2 watt for use, 120 ohm resistance for current-limiting resistance.No matter at any moment starter of positive-negative half-cycle, limit inrush currents effectively all.7 and 7 ' be all 1 ampere, 400 volts semiconductor diode.2 of A, B are 220 volts of voltages inputs of interchange, and 2 of C, D connect fluorescent lamp.

When this ballast is used for the fluorescent lamp of little wattage, can remove 7 ' and 3,5 each element.

Advantage of the present invention at first is energy-conservation.The one side power consumption of this ballast little (about 0.5 watt) own, this is littler several times than common inductance type ballast power consumption (about more than 3 watts).The fluorescent lamp that is work under this ballast on the other hand is capacity load, and normal domestic use electrical equipment such as electric fan, refrigerator etc. are inductive load, therefore simultaneously uses this ballast will improve the power factor of current supply circuit again in the family.For example 20 watts of inductance types and 20 watts of in parallel uses of capacitive ballast fluorescent lamp can make circuit power factor bring up to 0.71 by 0.23.Another characteristics of the present invention are small and light, and volume is less than 10cm ³, weight is less than 100 grams, and is and with low cost, when powering up, and build-up of luminance immediately, reliable operation.

Embodiment: see shown in the accompanying drawing 1,2,3 that wherein the parameter selection can be:

1 AC capacitor is withstand voltage 250 volts, capacitance is 2-5 μ f

2 electrolytic capacitor capacitances are 2-5 μ f

3,4,5 is withstand voltage 600 volts of small capacitor, the about 3000pf of capacitance

1/2 watt of 6 current-limiting resistance, 120 ohm

7 is 1 ampere of semiconductor diode, 400 volts

Present technique is done overtesting with 20 watts of fluorescent lamps, and accumulative total is lighted more than 500 time, works more than 600 hour, and fluorescent lamp is still worked normally.

Description of drawings:

Fig. 1 electric capacity all-wave ballast external form figure

A, B exchange 220 volts of voltage input ends

C, D output

The E shell

The F core

The G detection window

Fig. 2 electric capacity all-wave ballast theory diagram

H capacitance current-limiting device

The rectification of I full wave and voltage doubling

The J fluorescent lamp

Fig. 3 electric capacity all-wave ballast circuit figure

1 AC capacitor

2 electrolytic capacitors

3,4,5 small capacitors

6 current-limiting resistances

7 semiconductor diodes

7 ' semiconductor diode

Claims (3)

1, a kind of novel capacitor all-wave ballast that contains elements such as semiconductor rectifier diode, capacitor, resistance is characterized in that it being to be made of full-wave voltage doubler and AC capacitor series connection.

2, according to the described electric capacity all-wave of claim 1 ballast, it is characterized in that full-wave voltage doubler has:

1. 4-6 electric current is 1 ampere, and voltage is 400 volts semiconductor rectifier diode;

2. 1-2 electrolytic capacitor;

3. 2-4 withstand voltage 600 volts, the small capacitor of the about 3000pf of capacitance;

4. 1-2 current-limiting resistance.

3, according to the described electric capacity all-wave of claim 1 ballast, it is characterized in that the withstand voltage more than 250 volts of AC capacitor, capacitance is 2-5 μ f.

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