CN2275318Y - Low voltage lamp - Google Patents

Abstract

A low voltage lamp has higher light effect than an ordinary incandescent lamp, but can be accessed to the commercial power to be used after the voltage reduction by a transformer. After the low voltage lamp is connected with the commercial power in series through a capacitor by the utility model, wherein, a fixed current voltage segment of 43.6%* the network voltage is existed, the low voltage lamp accessed with one or more low voltage lamps can be formed by designing.

Description

Low voltage lamp

The utility model is a kind of Low voltage lamp that can directly use on civil power.

At present, known low-pressure lamp is the improvement of ordinary incandescent lamp, but must can use on civil power through the transformer step-down, and this use is made troubles to the user, and appendiron core transformer has the electric energy loss of 5%-15% again, and weight is big, should not hang.The existing so-called electronic transformer in market owing to use electronic devices and components more, does not also really reach a standard on reliability and durability, and because wave distortion causes the interference of harmonic wave to communication.

The purpose of this utility model provide a kind of do not have above-mentioned shortcoming also without the Low voltage lamp of transformer step-down.

The purpose of this utility model is achieved in that light fixture comprises a combination capacitor and low-pressure lamp, and described electric capacity and low-pressure lamp are connected in series.Low-pressure lamp also comprises low-voltage halogen tungsten, and described combination capacitor can be the combination capacitor more than 1, and all electric capacity has independent leading point.Each electric capacity can be connected in series, and can be connected in parallel, and also can connection in series-parallel connect, and described low-pressure lamp can be more than 1, as long as 0.436 * line voltage value is satisfied in its series connection pressure drop.And can switch in parallel on each low-pressure lamp, with indivedual unlatchings or close low-pressure lamp.

Below in conjunction with accompanying drawing the utility model embodiment is described further

Fig. 1 is 1 to be low-pressure lamp among the utility model circuit theory diagrams figure, the 2nd, and paralleling switch, the 3rd, combination capacitor.

Fig. 2 is the combination capacitor topology example.

Fig. 3 is that mode is lifted one's head in four kinds of connections of example combination electric capacity.

C1≠C ₂ C ₂＞C ₁ I ₄＞I ₃＞I ₂＞I ₁

Combination capacitor is in the shell of insulation, loads onto one or several capacitors that low-loss meets the electrical network requirement of withstand voltage, and this non-standard capacitor is special production, so that and shell mechanism combination.The utility model is rectangle combination as an example, inside comprises two polypropylene capacitors, these two electric capacity can be connected, parallel connection, or single external form and show four kinds of capability values are as more than two capacitors, then with series connection, parallel connection, or connection in series-parallel and each are single externally shows more capability value.

In addition, can switch in parallel on each low voltage bulb.

Its rationale and computational methods of lighting low-pressure lamp are as follows: with 220 volts in Chinese electrical network is that the example supply frequency is 50HZ

Wherein U is 220 volts;

So I _C=220 * 314C peace or

As long as

Just can meet wherein W of design condition _RBe low-pressure lamp wattage U _RBe low-pressure lamp voltage.

The utility model is based on following principle, its connect pattern be the capacitor that is calculated with connect low voltage bulb, capacitor pressure drop U after 220 volts of electrical networks are connected _CWith low-pressure lamp pressure drop U _RWith the following relation of line voltage U～meet.Promptly

U _- ²＝U _C ²+U _R ²

Further calculate proof: make I _CThe U of decline 10% _RValue U _RBe:

198 volts are got by following formula

Promptly

Because of U _CDescend 10%, so divided by the I of Xc value _CAlso descend 10% in proportion at this moment $\frac{U_R}{U_{~}}=\frac{95.9}{220}=43.6\%$

More than calculate proof: the utility model is exactly to utilize this closely to decide the low-pressure lamp that Current Zone is lighted 1 or 8 12 volts.(with the series connection pattern), though load is changed 8 times, electric current changes＜10%.

Advantage of the present utility model such as following:

1, the cost with a combination capacitor does not exceed a transformer, light so 8 low When pressing lamp, equal to save 7 transformers, but the decrease cost.

2, condenser loss little, do not generate heat, not fragile.

3, definite value current flow heats osram lamp.Make bulb that one brightening process be arranged, make filament obtain good protection, prolonged the life-span of existing low-pressure lamp.

There is not Harmonic Interference when 4, lighting.

5, in light weight, make light fixture, be convenient to hang.

6, light fixture is capacitive reactances, and power factor of electric network is had certain compensating action.

7, because the isolation metering function of electric capacity is arranged,, so just can effectively prevent the effect of transient state charging current so each low-pressure lamp can use and the direct switching circuit in parallel of bulb.

8, as described in 7, so low-pressure lamp partly has the safety function of not being afraid of short circuit.

Claims (6)

1, a kind of Low voltage lamp is characterized in that described light fixture comprises a combination capacitor and low-pressure lamp, and described electric capacity and low-pressure lamp are connected in series.

2,, it is characterized in that described Low voltage lamp is the low-voltage halogen tungsten tool according to the described light fixture of claim 1.

3,, it is characterized in that described electric capacity comprises the combination capacitor more than 1 according to the Low voltage lamp of claim 1 or 2.

4, according to the described Low voltage lamp of claim 3, it is characterized in that described electric capacity, each electric capacity has independent leading point, and each electric capacity can be connected in series, and can be connected in parallel, and can connection in series-parallel connect.

5, according to the described light fixture of claim 1, it is characterized in that the quantity of described low-pressure lamp can be 〉=1; 0.436 * line voltage value is satisfied in low-pressure lamp series connection pressure drop.

6, Low voltage lamp according to claim 1, it is characterized in that can 1 switch in parallel on described each low-pressure lamp.

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