CN201758478U - Dual-channel different-frequency power supply of gas-discharge lamp - Google Patents

Abstract

Provided is a dual-channel different-frequency power supply of a gas-discharge lamp. A power-frequency heavy-current power supply and a high-frequency low-current power supply, which are composed of a power factor compensation capacitor C1, a rectification inductor E, a filter capacitor C2 and a high-frequency power supply generation circuit F, are in parallel connection to supply power to a tube. The rectification inductor E needs not to provide starting excitation high voltage to the tube, so that a pure-inductance rectifier can be selected. When the tube normally illuminates, the operating voltage approaches the voltage of commercial power, thereby enhancing the utilization rate of the electric energy. The power of the high-frequency power supply generation circuit F when the tube is started and normally illuminates is less than 50W, and the frequency is design to be 2.5MHz-3MHz, which facilitates the excitation of free electrons in the tube and is beneficial to both luminous efficiency enhancement and electrode protection. The output power of the whole circuit is controlled by adjusting an inductor L1 and an inductor L2. A symmetric design is adopted, aiming to reduce the electromagnetic interference.

Description

The alien frequencies power supplied power supply of the two-way of gaseous discharge lamp

Technical field

The utility model is a kind of electron rectifier power supply that relates to gaseous discharge lamp.

Background technology

Gaseous discharge lamp has high-pressure sodium lamp, high-pressure mercury lamp, Metal halogen lamp, xenon lamp, fluorescent lamp etc., and at present, the rectifier that is complementary with these lamps can be divided into two kinds on the market, and a kind of is the inductance rectifier, and another kind is an electron rectifier.They all are to be the gaseous discharge lamp power supply with the single power supply, all have the defective that is difficult to overcome in actual use.

The power factor of inductance rectifier is not high, and the consumption of self will account for 4% to 10% of total energy consumption.Improve the power factor of inductance rectifier, though can take the capacitance compensation method to overcome,, compensation nearby can influence the life-span of lamp, so individual electric current is big, it is thick that input lead is wanted, and line loss is big; Though the consumption problem of inductance rectifier self can be used the low consumption inductance,, can have a strong impact on the startup of lamp again.

For electron rectifier,, the not high and power of energy conversion rate occurs and do little problem though solved the power factor problem.The efficient of existing electron rectifier is generally less than 90%, and power output is less than 500W.

Therefore, no matter the employed rectifier of existing gaseous discharge lamp is inductance rectifier or electron rectifier, and they all exist self intrinsic defective and insoluble technical barrier.The applicant is by long term studies and test, developed a kind of alien frequencies power supplied power supply of two-way of gaseous discharge lamp, it has adopted brand-new design idea, the one, utilize high frequency voltage to excite the medium in the fluorescent tube to produce the purpose that free electron reaches starter, the 2nd, adopt low consumed pure inductance rectifier rectification power frequency electricity to directly act on fluorescent tube.

The utility model content

The purpose of this utility model provides a kind of alien frequencies power supplied power supply of two-way of gaseous discharge lamp, this power supply input AC civil power, output circuit has two-way alien frequencies voltage to be supplied to gaseous discharge lamp, one the tunnel is high frequency power supply output, another road is the power frequency power supply circuits, both have the different division of labor and effect, and wherein the effect of high-frequency alternating current is starter and excites the medium in the fluorescent tube to produce the more freedom electronics; Industrial-frequency alternating current provides electric current for gaseous discharge lamp.

The alien frequencies power supplied power supply of the two-way of gaseous discharge lamp described in the utility model, it comprises the civil power input lead, the power supply shell, surface-mounted integrated circuit, double frequency output lead and power supply lid, described surface-mounted integrated circuit comprises: power factor compensation capacitance C1, inductor rectifier E, filter capacitor C2 and high frequency electric source generation circuit F, inductor rectifier E is made up of inductor L1 and inductor L2, inductor L1 is between mains electricity input end A and dual frequency power supplies output C, inductor L2 is between mains electricity input end B and dual frequency power supplies output D, power factor compensation capacitance C1 is between mains electricity input end A and mains electricity input end B, and filter capacitor C2 is between the winding wire of the winding wire of inductor L1 and inductor L2; The input of high frequency electric source generation circuit F is connected to the two ends of filter capacitor C2, the output of high frequency electric source generation circuit F links to each other with dual frequency power supplies output D with dual frequency power supplies output C, described high frequency electric source generation circuit F comprises bridge rectifier G, filter capacitor C5, switching transistor H, inductor L3, oscillating capacitance C6, high frequency transformer K, power coupling capacitance C3, C4, the interchange input of bridge rectifier G is connected to the two ends of filter capacitor C2, filter capacitor C5 is connected between the dc output end of bridge rectifier G, be connected between the dc output end of bridge rectifier G after two switching transistor H series connection, link to each other between oscillating capacitance C6 and inductor L3 series connection back one end and two the switching transistor H, the other end links to each other with high frequency transformer K.

In the alien frequencies power supplied power supply of the two-way of gaseous discharge lamp, because inductor rectifier E does not need to provide startup excitation high pressure to the venting electric light, so just can select the pure inductance rectifier of low magnetic consumption, no magnetic leakage, no resistance, when the fluorescent tube normal illumination, its operating voltage is near line voltage, thereby improved the utilance of electric energy.High frequency electric source generation circuit F is when tube starting and normal illumination; do not need to provide big electric current; we can more help exciting in the fluorescent tube free electron the Frequency Design of this circuit at 2.5MHz～3MHz, all are beneficial to improving light efficiency and guard electrode like this.

Because lamp tube ends has power frequency high-current supply and high frequency low-current power supply to power simultaneously, the power frequency high-current supply is added in lamp tube ends by the power frequency high-current supply that civil power forms after by inductor L1, inductor L2 rectification.The high frequency low current voltage that the high frequency low-current power supply is then produced by high frequency electric source generation circuit F is added in the two ends of fluorescent tube.When fluorescent tube started, at first the high frequency low current voltage that is produced by high frequency electric source generation circuit F was added in the two ends of fluorescent tube, made fluorescent tube generation aura and inspired free electron, and then make fluorescent tube send high light by the power frequency high-current supply.In the power frequency high-current supply, inductor L1 and inductor L2 except metering function, can also isolate the effect that the high frequency low current seals in the input of high frequency electric source generation circuit F and seals in electrical network on same iron core; Power factor compensation capacitance C1, inductor rectifier E, filter capacitor C2 also have filtering to fall the effect of electromagnetic interference except the compensation power factor.Power coupling capacitance C3, C4 be except there being the power coupling of high frequency electric source generation circuit F and fluorescent tube, and the electricity of isolating the power frequency high-current supply in addition seals in the effect among the high frequency electric source generation circuit F.

Power can be higher when fluorescent tube starts for high frequency electric source generation circuit F, and generally about 50W, fluorescent tube is regulated by tube impedance automatically after starting, and the power of high frequency electric source generation circuit F can drop to about 30W.Experiment showed, if the Frequency Design of high frequency electric source generation circuit F at 2.5MHz～3MHz, power is controlled in the 50W, this circuit fully can starter all gases discharge lamp, also can make and produce enough free electrons in all gases discharge lamp.

The power output of entire circuit is controlled by the size adjustment of inductor L1, inductor L2.

The circuit of the alien frequencies power supplied power supply of two-way of gaseous discharge lamp described in the utility model has been taked symmetric design, its objective is in order to reduce electromagnetic interference.The source that electromagnetic interference produces is analyzed as follows:

1. fluorescent tube: the electric current in the fluorescent tube has two kinds, and a kind of is power current, and another kind is high-frequency current (2.5MHz-3MHz), and high-frequency electrical fails to be convened for lack of a quorum and is distributed in the surface of power current, and the high-frequency current flow trace is stable.So not only reduced the stroboscopic and the dazzle of fluorescent tube, and power current is had certain effect of contraction, the electromagnetic interference of fluorescent tube generation is lower than what produce under the conventional conditions like this, and experimental result also proves this point.

2. because inductor L1 and inductor L2 do not have air gap, and magnetic leakage is little, so its electromagnetic interference is less than 10% of the electromagnetic interference of conventional rectifier.

3. high frequency electric source generation circuit F, this circuit is exactly the high-frequency power supply circuit of a 30W～50W, we have made full use of inductor L1 in this circuit, inductor L2, power factor compensation capacitance C1, the filter action of filter capacitor C2, inductor L1, inductor L2, power factor compensation capacitance C1, the parameter of filter capacitor C2 is that the requirement by rectification and Active PFC designs, the parameter of electric capacity is bigger 1000 times than the requirement of design filtering, the parameter of inductance is bigger 50 times than the requirement of design filtering, the inhibition effect of its electromagnetic interference exceeds 100～200 times than the designing requirement of filtering, can satisfy the requirement that suppresses electromagnetic interference fully.

4. in the starter and normal illumination process of fluorescent tube, free electron number in the fluorescent tube is more secure than the free electron number that existing other technology produces, what this had not only solved gaseous discharge lamp puts out phenomenon certainly, and has reduced the ripple coefficient of electric current, has also reduced electromagnetic interference.

Description of drawings

Fig. 1 is the utility model circuit theory diagrams;

Fig. 2 is a structural representation of the present utility model;

Wherein, 1-input lead; 2-power supply shell; The 3-surface-mounted integrated circuit; 4-double frequency output lead; 5-power supply lid;

A, B are the mains electricity input end; C, D are the dual frequency power supplies output; E is an inductor rectifier; F is a high frequency electric source generation circuit; G is a bridge rectifier; H is a switching transistor; K is a high frequency transformer; C1 is a power factor compensation capacitance; C2, C5 are filter capacitor; C3, C4 are the power coupling capacitance; C6 is an oscillating capacitance; L1, L2, L3 are inductor.

Embodiment

Below in conjunction with Figure of description embodiment of the present utility model is described:

The alien frequencies power supplied power supply of the two-way of gaseous discharge lamp described in the utility model, by civil power input lead 1, power supply shell 2, surface-mounted integrated circuit 3, double frequency output lead 4 and power supply lid 5 are formed, described surface-mounted integrated circuit 3 comprises: power factor compensation capacitance C1, inductor rectifier E, filter capacitor C2 and high frequency electric source generation circuit F, inductor rectifier E is by inductor L1, inductor L2, inductor L1 is between mains electricity input end A and dual frequency power supplies output C, inductor L2 is between mains electricity input end B and dual frequency power supplies output D, power factor compensation capacitance C1 is between mains electricity input end A and mains electricity input end B, and filter capacitor C2 is between the winding wire of the winding wire of inductor L1 and inductor L2; The input of high frequency electric source generation circuit F is connected to filter capacitor C2 two ends, the output of high frequency electric source generation circuit F links to each other with dual frequency power supplies output D with dual frequency power supplies output C, described high frequency electric source generation circuit F comprises bridge rectifier G, filter capacitor C5, switching transistor H, inductor L3, oscillating capacitance C6, high frequency transformer K, power coupling capacitance C3, C4, the interchange input of bridge rectifier G is connected to the two ends of filter capacitor C2, filter capacitor C5 is connected between the dc output end of bridge rectifier G, be connected between the dc output end of bridge rectifier G after two switching transistor H series connection, link to each other between oscillating capacitance C6 and inductor L3 series connection back one end and two the switching transistor H, the other end links to each other with high frequency transformer K.

Its course of work is as follows:

The power frequency high-current supply: civil power through inductor L2, is supplied with lamp tube ends after the inductor L1 current limliting from mains electricity input end A, B.

High frequency low-current power supply: from filter stream capacitor C 2 two ends input power frequency, after rectification, become direct current, become high-frequency alternating current through two switching transistor H again, again through high frequency transformer K transformation output high-frequency alternating current, output after power coupling capacitance C3, C4 are coupled.

Claims (1)

1. the alien frequencies power supplied power supply of the two-way of a gaseous discharge lamp, it is characterized in that: it comprises civil power input lead (1), power supply shell (2), surface-mounted integrated circuit (3), double frequency output lead (4) and power supply lid (5), described surface-mounted integrated circuit (3) comprising: power factor compensation capacitance C1, inductor rectifier E, filter capacitor C2 and high frequency electric source generation circuit F, inductor rectifier E is made up of inductor L1 and inductor L2, inductor L1 is between mains electricity input end A and dual frequency power supplies output C, inductor L2 is between mains electricity input end B and dual frequency power supplies output D, power factor compensation capacitance C1 is between mains electricity input end A and mains electricity input end B, and filter capacitor C2 is between the winding wire of the winding wire of inductor L1 and inductor L2; The input of high frequency electric source generation circuit F is connected to the two ends of filter capacitor C2, the output of high frequency electric source generation circuit F links to each other with dual frequency power supplies output D with dual frequency power supplies output C, described high frequency electric source generation circuit F comprises bridge rectifier G, filter capacitor C5, switching transistor H, inductor L3, oscillating capacitance C6, high frequency transformer K, power coupling capacitance C3, C4, the interchange input of bridge rectifier G is connected to the two ends of filter capacitor C2, filter capacitor C5 is connected between the dc output end of bridge rectifier G, be connected between the dc output end of bridge rectifier G after two switching transistor H series connection, link to each other between oscillating capacitance C6 and inductor L3 series connection back one end and two the switching transistor H, the other end links to each other with high frequency transformer K.

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