CN201639843U

CN201639843U - Driving power supply for metal halide lamps

Info

Publication number: CN201639843U
Application number: CN2010201271277U
Authority: CN
Inventors: 陈锦坚
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-03-01
Filing date: 2010-03-01
Publication date: 2010-11-17
Anticipated expiration: 2020-03-01

Abstract

The utility model relates to a driving power supply for metal halide lamps. The driving power supply is characterized in that the driving power supply consists of a surge voltage-inhibiting/anti-radio frequency interference circuit, a bridge rectifier and filter circuit, a passive power factor corrosion circuit, an inverter drive circuit, a frequency conversion and acceleration circuit and a high-frequency transformation and discharge circuit. Compared with the prior art, the utility model has the advantages of simple structure, low manufacturing cost and reliable operation.

Description

A kind of metal halide lamp driving power

Technical field:

The utility model relates to a kind of lamp driving power of high voltage startup.

Background technology:

Existing metal halide lamp has two kinds with driving power, and a kind of is the inductance type driving power, and a kind of is the electronic type driving power.The inductance type driving power is owing to need to use the copper cash of mass expensive, the cost height, and volume is big; The electronic type driving power is owing to be that the electric current that is produced is a low frequency, its frequency range and audio frequency range are overlapping, acoustic resonance takes place easily, for this reason, need to adopt single-chip microcomputer and correspondent control circuits, overcome the generation of acoustic resonance, owing to need to adopt single-chip microcomputer and circuit that some are extra by the program of complexity, therefore, this electronic type driving power also is the shortcoming that exists manufacturing cost high.

Summary of the invention:

Goal of the invention of the present utility model is to provide a kind of simple in structure, low cost of manufacture, reliable metal halide lamp driving power.

The utility model is achieved in that and comprises surge voltage inhibition/anti-radio frequency interference circuit, bridge rectifier filter circuit, the passive power factor correcting circuit, the inverse changing driving circuit that have capacitor C 5, capacitor C 6, the frequency inverted accelerating circuit that has transformer T1, the high frequency transformation discharge circuit that is connected in turn.During use, the two ends of HID lamp (metal halide lamp) are connected to secondary power output and the high frequency transformation discharge circuit of transformer T1.In the moment of energising, the utility model provides high-frequency high-voltage to the HID lamp, makes the discharge conducting of HID lamp and lights luminous.Because the electric current of driving HID lamp work is the high-frequency current up to hundreds of K, thereby avoided the frequency range of audio frequency effectively, avoided the generation of acoustic resonance, simultaneously, had to drive the work of HID lamp effectively.

Wherein, mainly to act on be to prevent from that electrical network from causing ballast to disturb and ballast work is that the high frequency that produces constitutes interference to electrical network to surge voltage inhibition/anti-radio frequency interference circuit; It is that AC rectification is become the required direct voltage of subsequent conditioning circuit that bridge rectifier filter circuit mainly acts on; It is the ON time that increases input current that passive power factor correcting circuit mainly acts on, and makes the sine wave of the waveform of power supply input current near input voltage, reduces the harmonic distortion of electric current, also makes input current and the same identical bits of input voltage simultaneously; Reduce phase difference between the two; Inverse changing driving circuit and frequency inverted accelerating circuit play a part power switch, change direct voltage into the high frequency power signal; High frequency transformation discharge circuit mainly is that Fu must be times over the voltage of the secondary output of high frequency transformer to offer metal halide lamp.

Compared with the prior art the utility model owing to adopted the circuit that can produce high-frequency current, therefore, has simple in structure, low cost of manufacture, reliable advantage.

Description of drawings:

Fig. 1 is a circuit diagram block diagram of the present utility model;

Fig. 2 is a circuit diagram of the present utility model.

Embodiment:

Now in conjunction with the accompanying drawings and embodiments the utility model is described in further detail:

As shown in Figure 1, the utility model comprises surge voltage inhibition/anti-radio frequency interference circuit, bridge rectifier filter circuit, the passive power factor correcting circuit, the inverse changing driving circuit that have capacitor C 5, capacitor C 6, the frequency inverted accelerating circuit that has transformer T1, the high frequency transformation discharge circuit that is connected in turn.

As shown in Figure 2,

The 220V AC power that electrical network is sent here is passed through C1, C2, C3, C4, deliver to by D1 behind the surge voltage inhibition/anti-radio frequency interference circuit that L1 forms, D2, D3, D4, C4 forms bridge rectifier filter circuit, wherein the main effect of surge voltage inhibition/anti-radio frequency interference circuit is high frequency clutter and the interference signal in the filtering electrical network, the electromagnetic radiation leakage of also avoiding simultaneously producing in the power supply is to the outside, to external world interference when reducing the work of the utility model electric ballast, through delivering to by C5 after the filtering of pulsating dc voltage behind the bridge rectifier filter circuit by capacitor C 4, C6, C8, C9, D5, D6, D7, L2-1, the passive power factor correcting circuit that L2-2 forms is supplied with respectively by R2, R3, C11, D8, D9, DB1 and by R5, V1, V2, R4, Z1, Z2, Z3, Z4, T1 (comprises elementary winding T1-1, secondary winding T1-2, T1-3, T1-4) inverse changing driving circuit of Zu Chenging, have the frequency inverted accelerating circuit of transformer T1, direct voltage passes through R2, advance to such an extent that charge to integrating capacitor C11 after the R3 current limliting; When reaching 30 to 40 volts, the C11 both end voltage adds to bidirectional trigger diode DB1 by diode D9, this moment the DB1 triggering and conducting, and there is electric current to flow into field effect transistor V2 control grid, make the V2 conducting, the path that electric current is flowed through is C6 → T1-1 → V2 drain electrode → ground, and the growth trend of V2 drain current is at the elementary winding T of high frequency transformer _1-1Last generation induced electromotive force, the while is level (T secondarily _1-2, T _1-3) also produce induced electromotive force, its polarity is to make to use the end of representing of the same name for following on each winding, thereby the grid potential of V2 is raise, grid current, drain current further strengthen, promptly in circuit, produce following chain reaction: trigger current → ig2 ↑ → id2 ↑ → vg2 ↑ make the V2 conducting saturated by above positive feedback effect, after the V2 conducting, the electric charge of integrating capacitor C11 is by diode D8 and field effect transistor V2 discharge, its voltage descends, no longer make the trigger tube conducting, this branch road also no longer exerts an influence to the V2 grid.So, by R1, R3, C11, and the triggering signal that provides of D9 only behind power connection, V2 is played trigger action.After V1, V2 took turns to operate, its operating frequency was higher, and V2 is very short deadline, and C11 has little time to be charged fully in the short like this time.And after the V2 conducting, C11 discharges again.Like this, the voltage above it is the very little sawtooth waveforms of some amplitudes, does not reach the voltage that is enough to make the DB1 conducting.Therefore, in case circuit conversion, V1, V2 take turns conducting with end after, DB1 will be no longer can conducting, V2 is also cut little ice.

After field effect transistor V2 conducting, beginning id2, ig2, Vg2 all increases, at a time vg2 reaches a peak value, ig2 also has a peak value, later on because the decline of high frequency transformer permeability, vg2, VT1-3 will descend with the rising of id2, ig2 also descends. and along with the increase of ig2 and the decline of magnet ring permeability, the situation that the voltage V T1-3 of high frequency transformer on level is lower than vg2 can occur, make grid current reverse, the ig2 change adds negative value, rely on this reverse current, V2 withdraws from from saturation condition, enters magnifying state, after entering magnifying state, the positive feedback of the decline of current i d2 by magnet ring reduces ig2, and id2 further reduces, V2 soon saltus step for ending, meanwhile, voltage on the high frequency transformer winding T1-2 changes polarity, on negative just down, postponed a period of time after V1 have electric current to produce, to produce induced electromotive force opposite when increasing in the high frequency transformer, and produce following process with id2.Id1 ↑ → vg1 ↑ → ig1 ↑ finally V1 becomes conducting by ending rapidly.Said process repeats down again and again, V1, V2 take turns conducting with end, at high frequency voltage of the secondary generation of high frequency transformer, by 6 voltage doubling rectifing circuits high frequency transformer is carried out voltage multiplying rectifier again, to obtain higher metal halide lamp starting resistor

The utility model also can be applicable on the gaseous discharge lamps such as sodium vapor lamp.

Claims

1. a metal halide lamp driving power is characterized in that comprising the surge voltage inhibition/anti-radio frequency interference circuit, bridge rectifier filter circuit, passive power factor correcting circuit, inverse changing driving circuit, frequency inverted accelerating circuit, the high frequency transformation discharge circuit that are connected in turn.

2. metal halide lamp driving power according to claim 1, it is characterized in that inverse changing driving circuit comprises R2, R3, C11, D8, D9, DB1, the frequency inverted accelerating circuit comprises R5, V1, V2, R4, Z1, Z2, Z3, Z4, T1, and T1 comprises elementary winding T1-1, secondary winding T1-2, T1-3, T1-4.