CN201328212Y - Power supply device of centralized energy-saving lamp - Google Patents

Abstract

The utility model discloses a power supply device of a centralized energy-saving lamp. The power supply device comprises an EMC filter circuit, a bridge rectifier circuit and a PFC circuit, wherein the EMC filter circuit carries out filter processing on an external impressed current, the bridge rectifier circuit rectifies the current after filter processing, and the filter rectification current is finally supplied to the energy-saving lamp through the PFC circuit. The power supply device provided by the utility model is compatible with the prior lamps, can supply power to the prior lamps, and also can be used for making lamps without a rectification circuit and a main capacitance; and meanwhile, the power supply device can uniformly provide central power supply for a plurality of integrative energy-saving lamps within a local scope, thereby greatly improving the power factor of a power distribution system and the circuit utilization efficiency.

Description

Centralized saving lamp power source device

Technical field:

The utility model relates to a kind of centralized electricity-saving lamp technology, particularly a kind of centralized saving lamp power source device that power factor of energy-saving lamp can be provided.

Background technology:

The integrated electric electricity-saving lamp is the novel energy-conserving light source of recent fashionable domestic and international market, it has distinguishing features such as volume is little, in light weight, the quick startup of the high and low voltage of light efficiency, can directly replace incandescent lamp bulb, be used for various illuminations and decorate the place, mention people's favor, become the energy-conserving product that state key is promoted, used in a large number in factory, public building, family.

The integrated electric electricity-saving lamp has following deficiency in application facet when having above-mentioned advantage:

1, the integrated electric power factor of energy-saving lamp is on the low side

In alternating current circuit, the cosine of the phase difference between voltage and the electric current (Ф) is called power factor, represents with symbol cos Ф.As shown in Figure 1, numerically, power factor is the ratio of active power and apparent power, and formula is: cos Ф=P/S, i.e. power factor=available power ÷ gross power.

But circuit of electronic ballast generally all is the low power factor circuit, employing be bridge rectifier, capacitor filtering.After the opening power, to electric capacity charging, when supply voltage is lower than voltage on the electric capacity, source current is 0, and load is by capacitances to supply power.Like this, have only near supply voltage diode peak value conducting to charge to electric capacity, thereby the current lead-through angle is very little, waveform is very poor, and higher harmonic content is big, and power factor is low, generally has only 0.5-0.65.The integrated lamp of low wattage all is this ballast in the market.

Because cheap, the compact conformation of these product prices does not have ability to arrange power factor compensation circuit, certainly will require electric power system to consider power factor compensation device separately.

But these electrical equipment use amounts are very big, and are especially especially surprising in place use amounts such as office, meeting room, classrooms.The existence of a large amount of reactive powers is not only wasted user's pile, and has been reduced supply transformer efficient, has strengthened line current and then has increased copper loss.Therefore this part low power factor electrical equipment also needs local compensation.

But for a long time, the technical development on the powerful bucking-out system that with the enterprise is unit is very fast, and light small and exquisite, simple, flexible, the easy to operate mini power factor compensation device technology of configuration be installed stay cool substantially.

2, integrated electric electricity-saving lamp failure rate height

The integrated electric electricity-saving lamp is owing to complex circuit, and compact conformation is in the acceptable price in market, its failure rate is high always, the user is generally reflected " energy-conservation economical ", and wherein the overwhelming majority is a ballast wiring board fault, and fluorescent tube itself seldom damages prior to wiring board.

3, integrated electric electricity-saving lamp EMC partly is wanting in consideration

The integrated electric electricity-saving lamp is because structure is very compact, and power is low, does not have arrangement space EMC circuit.

4, " cluster use "

Because integrated electric electricity-saving lamp itself makes in interior decoration, the mode of " cluster use " is mostly adopted in the use of low wattage electronic energy-saving lamp, and the layout of " babysbreath " formula is of common occurrence.

The utility model content:

The utility model is at the problem at above-mentioned integrated electric electricity-saving lamp place, and provides a kind of centralized saving lamp power source device to solve the integrated electric electricity-saving lamp because the caused a series of problems of power supply.

In order to achieve the above object, the technical solution adopted in the utility model:

Centralized saving lamp power source device, this device comprises EMC filter circuit, bridge rectifier, pfc circuit, described EMC filter circuit carries out Filtering Processing to external impressed current earlier, electric current after the Filtering Processing carries out rectification through bridge rectifier again to be handled, and the electric current of filter rectification is powered to electricity-saving lamp by pfc circuit control at last.

Described pfc circuit is active PFC, its by embedded PFC chip with and peripheral parametric circuit, BOOST give birth to piezoelectricity sense, metal-oxide-semiconductor, main electrochemical capacitor and form; This embedded PFC chip receives the current signal behind filter rectification, and gives birth to piezoelectricity sense, metal-oxide-semiconductor and the realization of the main electrochemical capacitor power supply to electricity-saving lamp by the peripheral parametric circuit of control, BOOST.

Described pfc circuit also can adopt passive PFC, and it is made up of diode and electrochemical capacitor.

The utlity model has following advantage according to what technique scheme obtained:

1, improves power factor (PF), centralized saving lamp power source belongs to power factor compensation series products on the spot carrying out distribution system design, use the unified a plurality of integrated energy-saving lamp centrally connected power supplies given in the subrange of this product, can improve power factor (PF), the circuit utilization ratio of distribution system greatly.

2, promote electricity-saving lamp quality, reduction electricity-saving lamp cost, adopt the illuminator of centralized saving lamp power source, electricity-saving lamp can save rectification circuit and main capacitance.Reduced cost like this, saved valuable inner space, can be used for arranging fin to be used for to drive part heater element heat radiation, improved simultaneously light fixture reliability, prolonged the life-span.

3, concentrate EMC filtering, reduced the conducted interference of whole illuminator.

Description of drawings:

Further specify the utility model below in conjunction with the drawings and specific embodiments.

Fig. 1 is the power factor (PF) schematic diagram.

The integrated electronic energy-saving lamp ballasting circuit of Fig. 2 figure.

Fig. 3 is the initiatively circuit theory diagrams of PFC mode of the utility model.

Fig. 4 is the circuit theory diagrams of the passive PFC mode of the utility model.

Embodiment:

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

Referring to Fig. 2, the normal ballasting circuit that adopts of its integrated electronic energy-saving lamp mainly is made up of bridge rectifier and electric capacity, oscillating circuit, drive circuit.Its bridge rectifier is made up of diode D1-D4, and electric capacity comprises C1-C5, and drive circuit mainly is made up of Q1 and Q2, and oscillating circuit mainly is made up of inductance L 1, L2; It carries out rectification by bridge rectifier to electric current handles, and again through capacitor filtering, drives oscillating circuit by drive circuit at last and produces oscillating circuit with to lamp tube power supply.

Above-mentioned ballasting circuit is the low power factor circuit, and what it adopted is bridge rectifier, capacitor filtering.After the opening power, to electric capacity charging, when supply voltage is lower than voltage on the electric capacity, source current is 0, and load is by capacitances to supply power.Like this, have only near supply voltage diode peak value conducting to charge to electric capacity, thereby the current lead-through angle is very little, waveform is very poor, and higher harmonic content is big, and power factor is low, generally has only 0.5-0.65.

For fear of above-mentioned situation, a kind of electric power system of High Power Factor is provided, the utility model has adopted centralized saving lamp power source principle scheme as shown in Figure 3 and Figure 4.

Centralized saving lamp power source as shown in the figure, it mainly is made up of EMC filter circuit, bridge rectifier, pfc circuit etc.; Since the difference of PFC design, the formula of can taking the initiative and passive type power source design:

Embodiment 1

As shown in Figure 3, be active power source design, the EMC filter circuit is made up of piezo-resistance F1, inductance L 1 and capacitor C 1, C2 in the circuit, and its annexation is not given unnecessary details as shown in the figure; Bridge rectifier is made of diode D1-D4, and its annexation is not given unnecessary details as shown in the figure; Pfc circuit by embedded PFC chip U1 with and peripheral parametric circuit, BOOST are given birth to piezoelectricity sense L2, metal-oxide-semiconductor T1, main electrochemical capacitor is formed, its annexation is not given unnecessary details as shown in the figure; This embedded PFC chip receives the current signal behind filter rectification, and gives birth to piezoelectricity sense, metal-oxide-semiconductor and the realization of the main electrochemical capacitor power supply to electricity-saving lamp by the peripheral parametric circuit of control, BOOST, to improve the power factor of electric power system.

Embodiment 2

As shown in Figure 4, be the power source design of passive type, EMC filter circuit is wherein interconnected by piezo-resistance F2, inductance L 21-L23, capacitor C 21-C29 to be formed, and its concrete annexation is not given unnecessary details as shown in the figure; Bridge rectifier is consistent with the bridge rectifier in the active power source design, and D21-24 connects to form successively by diode, and it is connected as shown in the figure with the EMC filter circuit, is not given unnecessary details; Pfc circuit in this scheme is interconnected by capacitor C 30-33, diode D25-28 and resistance R 21-24 to be formed, and its concrete annexation is not given unnecessary details as shown in the figure.When the power source design that obtains according to technique scheme carries out work, the electric current that enters is carried out Filtering Processing, carry out entering pfc circuit after the rectification through bridge rectifier again by the EMC filter circuit; When the electric current of process reached the conduction value of diode D25, whole pfc circuit will charge electricity-saving lamp is driven; If when the electric current of process does not reach the conduction value of diode D25, whole pfc circuit will can not charge, and promptly can not drive electricity-saving lamp.

When designing, can select different parameters, realize the power supply of 40W, 60W, 80W, 100W, 200W, 300W, all sizes such as 500W, 1000W according to such scheme.

The utility model can with existing light fixture compatibility, can give existing light fixture power supply, can customizedly not have the light fixture of rectification circuit and main capacitance yet.

More than show and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims (3)

1, centralized saving lamp power source device, this device comprises EMC filter circuit, bridge rectifier, pfc circuit, it is characterized in that, described EMC filter circuit carries out Filtering Processing to external impressed current earlier, electric current after the Filtering Processing carries out rectification through bridge rectifier again to be handled, and the electric current of filter rectification is powered to electricity-saving lamp by pfc circuit control at last.

2, centralized saving lamp power source device according to claim 1 is characterized in that, described pfc circuit is active PFC, its by embedded PFC chip with and peripheral parametric circuit, BOOST give birth to piezoelectricity sense, metal-oxide-semiconductor, main electrochemical capacitor and form; This embedded PFC chip receives the current signal behind filter rectification, and gives birth to piezoelectricity sense, metal-oxide-semiconductor and the realization of the main electrochemical capacitor power supply to electricity-saving lamp by the peripheral parametric circuit of control, BOOST.

3, centralized saving lamp power source device according to claim 1 is characterized in that, described pfc circuit is a passive PFC.

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