CN87216946U

CN87216946U - Bridge switch power supply for igniting gas discharger

Info

Publication number: CN87216946U
Application number: CN 87216946
Authority: CN
Inventors: 傅崇仁
Original assignee: Nankai University
Current assignee: Nankai University
Priority date: 1987-12-30
Filing date: 1987-12-30
Publication date: 1988-09-14

Abstract

The utility model belongs to the technical field of the power circuit design for igniting the gas discharge device. The utility model solves the technical problem that the traditional magnetic-leakage transformer ignites the neon lamp and results in low conversion efficiency. The power supply mainly uses a bridge switch circuit, wherein, the four arms of the bridge are formed from 2 semiconductor transistors and 2 capacitors. The utility model is mainly used for igniting the device which have the gas discharge class of the physical characteristic, for example, lasers, neon lamps, etc. The bridge switch power supply for igniting gas discharger can also ignite the filament lamp of which the rated voltage is below the commercial power.

Description

Bridge switch power supply for igniting gas discharger

The utility model belongs to the power circuit design field of lighting gas discharge device.

Tradition is lighted the mode that neon light generally adopts leakage transformer, and the gas discharge device power source special is made up of the step-down of power frequency civil power, rectification, oscillation step-up circuit at present.Its operation principle is: with the step-down of power frequency civil power, rectifying and wave-filtering is a direct current then with step-down transformer, produces audio frequency or superaudio vibration by single-ended or push-pull oscillator again, boosts through step-up transformer, and voltage multiplying rectifier is lighted gas discharge device.For example the JZ-1A type laser power supply of Shanghai Optical Instrument Factory No.2's production adopts above-mentioned principle.

The utility model purpose is to provide a volume little, in light weight, conversion efficiency height, the bridge switch power supply of the novel point combustion gas body discharge device of energy savings.It can be widely used in the device with this physical characteristic of gas discharge such as laser, neon light.Also can light incandescent lamp when this power circuit changes a little, this power supply is applicable to that the rated voltage of requirement is lower than the incandescent lamp of line voltage, and its conversion efficiency satisfies traditional ignition way height of incandescent lamp rated voltage through transformer conversion than civil power.

The designed this power supply of the utility model is by power frequency bridge rectification power＜1 〉, bridge switching circuit＜2 〉, output matching transformer＜3 〉, many voltage multiplying rectifiers power supply＜4 〉, restriction current element＜5〉is formed, the load that is applied＜6〉is the gas discharge device with this physical characteristic of gas discharge, as laser, neon light etc.

1. power frequency bridge rectification power＜1〉is by D ₁, D ₂, D ₃, D ₄4 semiconductor diodes constitute bridge rectifier again through C ₁Filtering capacitor filtering inserts high-frequency filter circuit in case of necessity and forms.

2. bridge switching circuit＜2〉is by BG ₁, BG ₂2 high back-pressure semiconductor transistor C ₁, C ₂2 are waited capacity capacitor to constitute bridge-type four arms and T ₁Positive feedback transformer and R ₁, R ₂, R ₃, R ₄4 resistor C ₂, C ₃2 capacitors are formed, and wherein the magnetic core of positive feedback transformer is a soft magnetic material, resistor R ₁, R ₂, R ₃, R ₄Offer BG respectively ₁, BG ₂Initial conduction bias current, capacitor C ₂, C ₃Respectively with resistance R ₂, R ₄Parallel connection is respectively BG ₁, BG ₂Provide the interchange bypass channel, transistor BG ₁, BG ₂Form single-ended push-pull circuit, wherein BG ₁Emitter and BG ₂Current collection power take-off very, this end and positive feedback transformer T ₁Elementary N ₁Coordination phase (band point end) connects N ₁The other end and output matching transformer T ₂Elementary series connection, positive feedback transformer T ₁Secondary N ₂Coordination phase (band point end) and transistor BG ₁Base stage connect N ₂Other end connecting resistance R ₁With R ₂The intersection, positive feedback transformer T ₁Secondary N ₃Coordination phase (band point end) connects resistance R ₃With R ₄Intersection N ₃The other end connect transistor BG ₂Base stage.

3. export coupling coefficient≤1 of matching transformer＜3 〉, T ₂The magnetic core of output matching transformer is a soft magnetic material.Work as T ₂The output matching transformer turns to autocoupling type or the mutual inductance type step-down transformer can be lighted incandescent lamp, and incandescent lamp is connected on T ₂On output matching transformer secondary, do not contain multiple voltage rectifier＜4〉in this circuit of lighting the incandescent lamp power supply and limit electric current original paper＜5 〉.

4. multiple voltage rectifier＜4〉is made up of several semiconductor diodes and capacitor, the multiplying power of voltage multiplying rectifier is not limit, when loaded work piece does not just need multiple voltage rectifier＜4〉circuit during at exchange status, load at this moment and secondary the getting final product of restriction electric current original paper series connection at output matching transformer＜3 〉.

5. restriction electric current original paper＜5〉is resistor under dc state, is capacitor, inductor under exchange status.

6. load＜6〉form that applies of this power supply is a serial or parallel connection.When restriction electric current original paper＜5〉consistent with discharging current or several discharge devices can be formed the load connection of series connection form, but and the load connection of the load recomposition parallel form of several such series connection forms.

The operation principle of above-mentioned power supply is: the power frequency civil power is the direct voltage of 270V-300V through bridge rectification power＜1〉rectification, bridge switching circuit＜2〉and output matching transformer＜3〉produce the audible communication vibration and boost, this voltage can obtain high direct voltage through multiple voltage rectifier＜4〉and come the build-up of luminance gas discharge device, makes it operate as normal.

The existing power supply of lighting gas discharge device is made up of civil power step-down transformer, rectification, vibration, booster circuit.Because use the civil power step-down transformer, so the conversion efficiency of whole power supply is low, and the utility model has adopted bridge switching circuit, has solved the low problem of this power supply conversion efficiency.Light incandescent lamp for the rated voltage of using transformer to make line voltage convert the incandescent lamp requirement to, as adopt the power supply of lighting incandescent lamp described in the utility model to have the high advantage of conversion efficiency equally.

Accompanying drawing 1 is for lighting the bridge switch power circuit schematic diagram of gas discharge device.In the frame of broken lines＜1〉is the power frequency bridge rectification power, and it is by D ₁, D ₂, D ₃, D ₄4 semiconductor diodes are formed bridge rectifier, C ₁Be filtering capacitor, 220

Expression power frequency line voltage.In the frame of broken lines＜2〉is bridge switching circuit, and it is by BG ₁, BG ₂Capacity capacitors such as 2 high back-pressure semiconductor transistors and 2 are formed bridge-type four arms, T ₁Be the positive feedback transformer, institute's target point is same-phase signal mark among the figure, and dotted line is the soft magnetic material magnetic core, R ₁, R ₂, R ₃, R ₄The expression resistor offers BG respectively ₁, BG ₂The usefulness of pipe work electric current, C ₂, C ₃For capacitor makes BG ₁, BG ₂Pipe work has bypass channel under exchanging.Be output matching transformer, T in the frame of broken lines＜3 〉 ₂Represent this transformer, the dotted line among the figure is the soft magnetic material magnetic core.In the frame of broken lines＜4〉is multiple voltage rectifier, and it is by D ₅, D ₆2 semiconductor diodes and C ₆, C ₇2 capacitors are formed.Be restriction current element, Z in the frame of broken lines＜5 〉 ₁Be resistor.Be load in the frame of broken lines＜6 〉, it is by f ₁To f _nIndividual gas discharge device is composed in series.

Accompanying drawing 2 is for lighting the bridge switch power circuit schematic diagram of incandescent lamp, and frame of broken lines＜1 〉,＜2 〉,＜3〉are all identical with the explanation of frame of broken lines＜1 〉,＜2 〉,＜3〉in the accompanying drawing 1, and the interior f of dotted line＜4〉represents incandescent lamp.

Line principle according to accompanying drawing 1 has been made model machine, and can light diameter 1cm length is the several neon lights of 100cm.The connecting mode of load can be a serial or parallel connection, and it is in parallel again as load the load of array series connection then also can to connect earlier.Made model machine according to the line principle of accompanying drawing 2 equally, lighted that rated voltage is the incandescent lamp of 10A for the 24V electric current on the projector.

Claims

1, a kind of power supply of lighting gas discharge device is by power frequency city piezoelectric transformer, rectification circuit, and oscillation step-up circuit constitutes.The utility model feature is power frequency bridge rectification power＜1〉constitute by 4 semiconductor diodes and filtering capacitor and insert high-frequency filter circuit in case of necessity and form, bridge switching circuit＜2〉be that to form wherein in the middle of bridge-type four arms two arms be that to form other two arms of single-ended push-pull circuit be capacity capacitors such as 2 to 2 high back-pressure semiconductor transistors for soft magnetic material and bridge-type four arms by the magnetic core of this transformer of positive feedback transformer, output matching transformer＜3〉the magnetic core of coupling coefficient≤1 this transformer be soft magnetic material, multiple voltage rectifier＜4〉form its multiplying power by several semiconductor diodes and capacitor and do not limit, when loaded work piece should remove multiple voltage rectifier＜4 under exchange status 〉, restriction current element＜5〉under dc state for being capacitor under the resistor exchange status, inductor, load are connected on restriction current element＜5〉back.

2, a kind ofly light the requirement that the incandescent lamp that is lower than city's voltage rated value needs to satisfy through transformer conversion the incandescent lamp rated voltage.To be power frequency bridge rectification power＜1〉by 4 semiconductor transistors and filtering capacitor constitute the utility model feature inserts high-frequency filter circuit in case of necessity and form, bridge switching circuit＜2〉by the magnetic core of this transformer of positive feedback transformer be soft magnetic material and bridge-type four arms form wherein in the middle of bridge-type four arms two arms be 2 high back-pressure semiconductor transistors to form other two arms of single-ended push-pull circuit be capacity capacitors such as 2, the magnetic core that output matching transformer＜3〉turns to autocoupling type or this transformer of mutual inductance type transformer is a soft magnetic material.

3,, it is characterized in that forming the load connection of series connection form, and the load of several such series connection forms can be formed the load connection of parallel form by restriction electric current original paper＜5〉consistent with discharging current or several discharge tubes according to the power supply of claim 1.