CN201805610U

CN201805610U - Improved electronic ballast of high-voltage sodium lamp

Info

Publication number: CN201805610U
Application number: CN2010205460634U
Authority: CN
Inventors: 李建春
Original assignee: HEBEI HAICHUAN ELECTRONIC TECHNOLOGY Co Ltd
Current assignee: HEBEI HAICHUAN ELECTRONIC TECHNOLOGY Co Ltd
Priority date: 2010-09-29
Filing date: 2010-09-29
Publication date: 2011-04-20
Anticipated expiration: 2020-09-29

Abstract

The utility model relates to an improved electronic ballast of a high-voltage sodium lamp, belonging to the technical field of illuminating equipment and aiming at providing a novel electronic ballast for the high-voltage sodium lamp. The improved electronic ballast consists of a rectifying and filtering circuit, a power factor correcting circuit, a resonance and suppression generating circuit, an overtemperature compensation circuit and a starting power modulating circuit which are connected in sequence, wherein the power factor correcting circuit consists of a transformer T1, an integrated circuit chip IC3, a pulse driving power tube V3, a diode, a resistor and a capacitor; a primary winding of the transformer T1 is an inductor, and a secondary winding of the transformer T1 is a zero-current detecting coil; an output end of the integrated circuit chip IC3 is connected with a grid of the pulse driving power tube V3; and a source of the V3 is connected with an current input end of the IC3, and a drain of the V3 is connected with an input end of the resonance and suppression generating circuit. The improved electronic ballast has the advantages that the power consumption is low, the power factor is high, the power can be adjusted automatically, the power output is constant, no strobe exists, the influence to a power grid is little, and the service life of a lamp tube can be prolonged.

Description

A kind of improved electronic ballast of high voltage sodium lamp

Technical field

The utility model relates to the ballast that a kind of high-pressure sodium lamp uses, and belongs to technical field of lighting fixtures.

Background technology

High-pressure sodium lamp is a kind of high-intensity gas discharge lamp, because it has luminous efficiency height and suitable wavelengths, and is widely used in outdoor lighting places such as road, factory, station.Be accompanied by socioeconomic fast development, a large amount of power consumptions arranged every year, and the most employings in this public illumination place is the high high-pressure sodium lamp of luminous efficiency in various public illuminations place.The overwhelming majority that operation is used on the circuit is traditional Inductive ballast at present, low because of its power factor, own loss is big, electrical network has been caused have a strong impact on, and has not only increased electric load, and make the confession power generating equipment can not get sufficient utilization, cause a large amount of energy wastes.

Electric ballast has the advantage of many uniquenesses with respect to traditional Inductive ballast, such as, power factor height, volume be little, in light weight, save raw material, cost is low, make light fixture that higher luminous efficiency etc. be arranged, remedied the shortcoming of Inductive ballast, energy-saving effect is obvious, has brought huge social and economic benefit.But present electronic ballast of high voltage sodium lamp is not smooth in promoting the use of, and its main cause is that present electric ballast exists following shortcoming:

1, circuit complexity, big, the reliability reduction of volume are not suitable for large-scale promotion and use;

2, need regulate power output by regulating input voltage, the phenomenon of turning off the light in the adjustment process, bright lamp rate reduces;

3, temperature rise is too high, and electronic devices and components are in the high temperature critical excitation, and the original paper reliability can not get ensureing that the life-span reduces greatly;

4, versatility is relatively poor, can not be applicable to various brand fluorescent tubes of the same type, makes troubles for maintenance in the future.

Because present product is subjected to multiple factor affecting such as working temperature, fluorescent tube quality, power grid quality at work easily, in operational environment, can't guarantee its stability, its reliability is reduced greatly, can not adapt to the real work needs, necessity that the great-power electronic ballast on the present market is significantly improved technically.

Summary of the invention

Technical problem to be solved in the utility model provide a kind of low in energy consumption, have High Power Factor and power can be regulated automatically, the improved electronic ballast of high voltage sodium lamp in constant, the no stroboscopic of power output, reliability height,, energy prolonging lamp tube little to electric network influencing useful life.

The technical scheme that solves the problems of the technologies described above is:

A kind of improved electronic ballast of high voltage sodium lamp, it is by current rectifying and wave filtering circuit, circuit of power factor correction, give birth to resonance and suppress circuit, the excess temperature compensating circuit, the starting power modulation circuit is formed, foregoing circuit connects successively, described circuit of power factor correction is by transformer T1, integrated circuit die I C3, pulsed drive power tube V3, diode D2, D3, resistance R 15 ~ R9, capacitor C 7 ~ C9 forms, the primary winding of transformer T1 is connected on the output of current rectifying and wave filtering circuit, auxiliary winding connects the zero current detection input of integrated circuit die I 3C by resistance R 2, the output of current rectifying and wave filtering circuit connects the voltage input end of integrated circuit die I C3 by resistance R 1, the grid of the output termination pulsed drive power tube V3 of integrated circuit die I C3, the source electrode of pulsed drive power tube V3 connects the current input terminal of integrated circuit die I C3, and the drain electrode of pulsed drive power tube V3 connects gives birth to the input that resonance suppresses circuit.

Above-mentioned improved electronic ballast of high voltage sodium lamp, described starting power modulation electric routing transformer T2, integrated circuit die I C1, pulsed drive power tube V1, V2, diode D5, inductance L 3, resistance R 25 ~ R29, capacitor C 13 ~ C19 forms, the voltage input end of integrated circuit die I C1 connects power supply, the output of integrated circuit die I C1 connects the grid of pulsed drive power tube V1 by the coupling of transformer T2, the grid of another output termination pulsed drive power tube V2 of integrated circuit die I C1, the source electrode of pulsed drive power tube V1 is connected with the drain electrode of pulsed drive power tube V2, connect the back and be connected with inductance L 3 and capacitor C 19 composition LC series circuit inputs, capacitor C 19 connects fluorescent tubes.

Adopt the electronic ballast of high voltage sodium lamp of this structure to have the following advantages:

1. oneself power consumption reduces.The oneself power consumption of electric ballast is about 10W, is about 1/4 of inductance rectifier, has saved electric energy greatly.

2. power is regulated automatically.Electric ballast adopts the mode of intelligent frequency-conversion to regulate power, thereby realizes intelligent dimming, regulates brightness under the less actual conditions of car, people in the second half of the night, avoids unnecessary waste.

3. High Power Factor.The power factor of electric ballast is more than 0.98, and Inductive ballast does not add under the situation of compensation, has only 0.4, adds compensation can only reach about 0.8 yet, and power consumption efficiency is low, uses electric ballast can reduce the cost of investment of the phase of just building greatly.

4. the output of permanent power, prolonging lamp tube useful life.Owing to have the automatic frequency-conversion function, reduce the fluctuation of electrical network and to the impact of fluorescent tube, thereby prolonged the useful life of fluorescent tube greatly.

5. there are not stroboscopic, reliability height, little to electric network pollution.Electric ballast is worked under the high frequency of 20-100KHz, and color rendering is good, no stroboscopic phenomenon.Electric ballast has power factor control circuit and power conditioning circuitry in addition, not influenced by voltage ripple of power network, continues good illumination effect.

Description of drawings

Fig. 1 is an electric functional-block diagram of the present utility model;

Fig. 2 is circuit theory diagrams of the present utility model.

Mark is as follows among the figure: current rectifying and wave filtering circuit 1, circuit of power factor correction 2, living resonance suppress circuit 3, excess temperature compensating circuit 4, starting power modulation circuit 5.

Embodiment

Show among the figure that the utility model is connected to form successively by current rectifying and wave filtering circuit 1, circuit of power factor correction 2, living resonance inhibition circuit 3, excess temperature compensating circuit 4, starting power modulation circuit 5.

Show among the figure that current rectifying and wave filtering circuit 1 is made up of rectifying tube D1, inductance L 1, L2, capacitor C 1, C2, C3, C4, C5 resistance R t, Rv.The 220V/50Hz civil power shields when short circuit overcurrent by fuse FU, the electromagnetic interface filter by being made up of capacitor C 1, C2, C3, C4, inductance L 1, L2 again, the radio frequency interference in the filtering circuit.By resistance R t, it is the negative tempperature coefficient thermistor original paper, is used to suppress the power connection surge current impact of moment.Again by rectifying tube D1, C5 current rectifying and wave filtering circuit, civil power is become key player on a team's alternating current of 100Hz, be input to following circuit of power factor correction 2.

Show among the figure that circuit of power factor correction 2 is made up of transformer T1, integrated circuit die I C3, pulsed drive power tube V3, diode D2, D3, resistance R 15 ~ R9, capacitor C 7 ~ C9.In the drawings among the embodiment of Xian Shiing, integrated circuit die I C3 adopts the MC33262 integrated circuit, its pin definitions is as follows: 1 pin-Voltage Feedback, 2 pin-compensation end, 3 pin-multiplier input, 4 pin-current sample input, 5 pin-zero current detection input, 6 pin-ground connection, 7 pin-driving output, 8 pin-voltage input.This IC interior has zero current detector, quadrature multiplier, self-starting timer, totem output and overvoltage, current foldback circuit.The primary winding of transformer T1 is the inductor of circuit of power factor correction 2, and auxiliary winding is the zero current detection coil; Diode D3 is a fly-wheel diode; Capacitor C 8 is a building-out capacitor, guarantees its reliable startup; Resistance R 6 is an overcurrent sample resistance; Capacitor C 7 is a filter capacitor.

When electric current in the primary winding of transformer T1 is zero, zero current detector action among the integrated circuit die I C3, make the pulse of its 7 pin output certain width, pulsed drive power tube V3 conducting during this period, voltage rises and energy storage in the primary winding of transformer T1, V3 turn-offs from pulse decline beginning pulsed drive power tube utmost point pipe, self induction electromotive force gives capacitor C 9 chargings by diode D3, thereby form the direct voltage of 400V at its two ends, the envelope waveform of input current and input voltage is approximate, and homophase, makes the power factor of its circuit approach 1.This circuit structure is simple, and peripheral circuit element is few, has reduced the volume of circuit, has reduced circuit cost and has improved reliability.

Show among the figure, give birth to resonance inhibition circuit 3 and form by integrated circuit die I C2, resistance R 10 ~ R16, capacitor C 10-C12, diode D4.Integrated circuit die I C2 adopts the MC14060 clock chip among the embodiment of Xian Shiing in the drawings, control its output frequency by adjusting resistance R 15, R16, capacitor C 12, the output square wave is after the 7 pin output of integrated circuit die I C2, by the triangular wave that resistance R 11 produces a certain frequency for capacitor C 11 chargings, be added to 2 pin of integrated circuit die I C1 again by resistance R 12, R13, R14.Thereby the output frequency of 6,7 pin of the integrated circuit die I C1 in the starting power modulation circuit 5 is come and go, effectively suppress to give birth to the generation of resonance.

Show among the figure, excess temperature compensating circuit 4 is made up of resistance R 17 ~ R24, triode D6, D7, when ballast is operated in rated temperature range, make triode D6 be in magnifying state by regulating resistance R 18, R19, R20, R21, regulate resistance R 23 again, R24 makes triode D7 be in cut-off state.When temperature raise, the turn-on voltage of triode D6, D7 reduced, and this moment, triode D6 was in saturation condition, and triode D7 is in conducting-saturation condition, makes it in parallel with resistance R 26, plays the effect of regulating power.

Show among the figure, starting power modulation circuit 5 is by transformer T2, integrated circuit die I C1, pulsed drive power tube V1, V2, diode D5, inductance L 3, resistance R 25 ~ R29, capacitor C 13 ~ C19 forms, the voltage input end of integrated circuit die I C1 connects power supply, the output of integrated circuit die I C1 connects the grid of pulsed drive power tube V1 by the coupling of transformer T2, the grid of another output termination pulsed drive power tube V2 of integrated circuit die I C1, the source electrode of pulsed drive power tube V1 is connected with the drain electrode of pulsed drive power tube V2, connect the back and be connected with inductance L 3 and capacitor C 19 composition LC series circuit inputs, capacitor C 19 connects fluorescent tubes.

In the drawings among the embodiment of Xian Shiing, integrated circuit die I C1 is the MC33152 chip, adopt 8 pin SOIC encapsulation, this circuit has preheating, igniting and three kinds of mode of operations of operation, after connecting circuit, there has been 15V voltage to add power supply for integrated circuit die I C1 on the VCC, made the pulsed drive pulsed drive power tube V1, the V2 alternate conduction that produce on 7 pin 6.

After the VCC voltage on the integrated circuit die I C1 pin 8 surpasses threshold voltage, enter preheating mode, integrated circuit die I C1 internal electric source is to the charging of the capacitor C PH on 4 pin, and the voltage on the capacitor C PH begins to raise from 0V, finishes preheating when reaching 2.9V.Determine by CPH warm-up time.

After preheating finishes, enter ignition mode.Under this pattern, capacitor C PH goes up voltage and is raised to 5V from 2.9V, and switching frequency is linear to be reduced, and when the natural frequency of surface sweeping frequency and LC series circuit, resonance takes place then, and the high-voltage pulse of generation is lighted lamp.

When capacitor C PH went up voltage above 5V, integrated circuit die I C1 entered operational mode.

Foregoing description only proposes as several enforceable technical schemes of electronic ballast of high voltage sodium lamp of the present utility model, not as the single restrictive condition to its technical scheme itself.

Claims

1. improved electronic ballast of high voltage sodium lamp, it is characterized in that: it is by current rectifying and wave filtering circuit [1], circuit of power factor correction [2], give birth to resonance and suppress circuit [3], excess temperature compensating circuit [4], starting power modulation circuit [5] is formed, foregoing circuit connects successively, described circuit of power factor correction [2] is by transformer T1, integrated circuit die I C3, pulsed drive power tube V3, diode D2, D3, resistance R 15 ~ R9, capacitor C 7 ~ C9 forms, the primary winding of transformer T1 is connected on the output of current rectifying and wave filtering circuit [1], auxiliary winding connects the zero current detection input of integrated circuit die I C3 by resistance R 2, the output of current rectifying and wave filtering circuit [1] connects the voltage input end of integrated circuit die I C3 by resistance R 1, the grid of the output termination pulsed drive power tube V3 of integrated circuit die I C3, the source electrode of pulsed drive power tube V3 connects the current input terminal of integrated circuit die I C3, and the drain electrode of pulsed drive power tube V3 connects gives birth to the input that resonance suppresses circuit [3].

2. improved electronic ballast of high voltage sodium lamp according to claim 1, it is characterized in that: described starting power modulation circuit [5] is by transformer T2, integrated circuit die I C1, pulsed drive power tube V1, V2, diode D5, inductance L 3, resistance R 25 ~ R29, capacitor C 13 ~ C19 forms, the voltage input end of integrated circuit die I C1 connects power supply, the output of integrated circuit die I C1 connects the grid of pulsed drive power tube V1 by the coupling of transformer T2, the grid of another output termination pulsed drive power tube V2 of integrated circuit die I C1, the source electrode of pulsed drive power tube V1 is connected with the drain electrode of pulsed drive power tube V2, connect the back and be connected with inductance L 3 and capacitor C 19 composition LC series circuit inputs, capacitor C 19 connects fluorescent tubes.