CN202617484U

CN202617484U - Self-excited oscillation type high-frequency electronic generator

Info

Publication number: CN202617484U
Application number: CN2012201955374U
Authority: CN
Inventors: 谢立山; 陈裕嘉; 袁青辉; 杨红敏
Original assignee: GELINLAI ELECTRONIC TECHNOLOGY Co Ltd SHENZHEN
Current assignee: Guangdong Greenlight Photoelectric Tech Co Ltd
Priority date: 2012-05-02
Filing date: 2012-05-02
Publication date: 2012-12-19
Anticipated expiration: 2022-05-02

Abstract

The utility model provides a self-excited oscillation type high-frequency electronic generator, comprising a half-bridge starting type trigger circuit connected with an impressed current input current, a transformer coupling circuit connected with the trigger circuit, and a resonance matching circuit connected with the transformer coupling circuit, wherein the resonance matching circuit is connected with a high voltage gas discharge lamp and is formed by connecting two metal oxide semiconductor field effect transistors in series, the drains of the two metal oxide semiconductor field effect transistors are both connected with the trigger circuit, and the grids of the two metal oxide semiconductor field effect transistors are both connected with the transformer coupling circuit. The self-excited oscillation type high-frequency electronic generator disclosed by the utility model is simple, low in cost, high in efficiency, small in temperature rise and reliable during working.

Description

A kind of self-excited oscillation type high-frequency electronic generator

Technical field

The utility model relates to a kind of self-excited oscillation type high-frequency electronic generator.

Background technology

As everyone knows, (High intensity Discharge HID) is the general designation of mercury, sodium, gold, xenon lamp, i.e. mercury lamp, sodium vapor lamp, Metal halogen lamp, xenon lamp to high-voltage gas discharging light.Wherein the principle of xenon lamp is in the quartzy quartz glass tube of UV-cut uvioresistant; With the number of chemical gas filling; Wherein major part is an xenon (Xenon) and inert gas such as iodide, and then sees through booster (Ballast) low pressure (as 12 volts) direct voltage moment is pressurized to 23000 volts electric current, excites the xenon electronics in the quartz ampoule free through the high pressure amplitude of vibration; Between two electrodes, produce light source, Here it is so-called gas discharge.And, can improve the light color temperature value by the white superpower arclight that xenon produced, and the sunshine in similar daytime, the required magnitude of current is merely 3.5A during HID work, and brightness is three times of traditional based on halogen bulb, and useful life is than long 10 times of traditional based on halogen bulb.

With high_frequency sine wave driven high-voltage gas discharging light fluorescent tube, can reduce the sputtering loss of electrode, and arc stability, very favourable to the life-span of prolonging lamp tube, the relative power frequency of high frequency can improve the light efficiency about 15% again.In fact, when studying the HID lamp electronic ballast end of the eighties in last century, light a lamp, but initial frequency of utilization is mostly about 20KHz-70KHz, seldom above 120KHz with the high frequency frequency.Higher frequency fails to form product because technical difficulty and cost problem only rest on the laboratory.So, be that the above R&D work of high band 250KHz gets into a difficult position on the one hand, and the frequency below the 250KHz just drops within ' window ' of ' acoustic resonance ' and ' arc wafts '.In electronic ballast, present more use low-frequency square-wave drive pattern, and the application of high-frequency drive pattern is less.Reason is that there is ' acoustic resonance ' problem in the HID lamp in certain high band is used, and experiment shows that the probability that ' acoustic resonance ' takes place in this frequency range of 10KHz-250KHz is the highest.

The utility model content

The utility model proposes a kind of self-excited oscillation type high-frequency electronic generator, has solved " acoustic resonance " in the prior art the inconstant problem of power.

The technical scheme of the utility model is achieved in that

The utility model discloses a kind of self-excited oscillation type high-frequency electronic generator; Comprise that the half-bridge that links to each other with the impressed current input current starts the formula circuits for triggering; The transformer-coupled circuit that links to each other with described circuits for triggering; The resonance match circuit that links to each other with described transformer-coupled circuit, described resonance match circuit links to each other with high-voltage gas discharging light, and described resonance match circuit is connected in series mutually by two metal-oxide half field effect transistors and forms; The drain electrode of described two metal-oxide half field effect transistors all links to each other with circuits for triggering, and grid all links to each other with described transformer-coupled circuit.

In the described self-excited oscillation type high-frequency electronic of the utility model generator; Described self-excited oscillation type high-frequency electronic generator also comprises filter circuit; Be connected between described resonance match circuit and the described high-voltage gas discharging light, be used for described resonance match circuit is carried out filtering.

In the described self-excited oscillation type high-frequency electronic of the utility model generator, described high-voltage gas discharging light two ends are provided with two-way clamp diode, are used for exporting described high-voltage gas discharging light protection in safe range.

In the described self-excited oscillation type high-frequency electronic of the utility model generator, described transformer-coupled circuit input is provided with two-way clamp diode, is used for the voltage protection that exports described transformer-coupled circuit input in safe range.

In the described self-excited oscillation type high-frequency electronic of the utility model generator; Two secondary coils that described transformer-coupled circuit has primary coil and is coupled with it; The trigger impulse that described circuits for triggering produce is coupled to two secondary coils through the primary coil of transformer; Form two induced voltages that phase place is opposite, amplitude equates at two grids of described metal-oxide half field effect transistor; Make described resonance match circuit take turns conducting, produce ' drawing ', ' fillings ' electric current, and export described high-voltage gas discharging light near the square wave of 400V in the mid point generation amplitude of described metal-oxide half field effect transistor.

Implement a kind of self-excited oscillation type high-frequency electronic generator of the utility model, have following beneficial technical effects:

Circuit is simple, cost is low, efficient is high, temperature rise is little, reliable operation, can make 35 meters high mast lightings, is intended to replace 400W high-pressure sodium lamp commonly used at present.

Description of drawings

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiment of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is a kind of self-excited oscillation type high-frequency electronic of the utility model generator hardware construction sketch map;

A kind of self-excited oscillation type high-frequency electronic of Fig. 2 the utility model generator hardware partial circuit diagram.

Embodiment

To combine the accompanying drawing among the utility model embodiment below, the technical scheme among the utility model embodiment is carried out clear, intactly description, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.

See also Fig. 1 and Fig. 2; The preferred embodiment of the utility model, a kind of self-excited oscillation type high-frequency electronic generator comprises: the half-bridge that links to each other with the impressed current input current starts formula circuits for triggering 1; The transformer-coupled circuit 2 that links to each other with circuits for triggering 1; The resonance match circuit 3 that links to each other with transformer-coupled circuit 2, resonance match circuit 3 links to each other with high-voltage gas discharging light 6, and resonance match circuit 3 is connected in series mutually and is formed by two metal-oxide half field effect transistor Q1, Q2; The drain electrode of two metal-oxide half field effect transistors all links to each other with circuits for triggering 1, and grid all links to each other with transformer-coupled circuit 2.

Wherein, A kind of distortion as the preferred embodiment of the utility model; Self-excited oscillation type high-frequency electronic generator also comprises filter circuit 5 and the protective circuit of being made up of a plurality of electric capacity and inductance 4, is connected between resonance match circuit 3 and the high-voltage gas discharging light 6, and filter circuit 5 is used for resonance match circuit 3 is carried out filtering; Protective circuit 4 is used to protect the electric current through filter circuit 5 excessive, burns filter circuit 5 and high-voltage gas discharging light 6.

High-voltage gas discharging light 6 two ends are provided with two-way clamp diode TVS1, are used for exporting high-voltage gas discharging light 6 protections in safe range.

Transformer-coupled circuit 2 inputs are provided with two-way clamp diode TVS2, are used for the voltage protection that exports transformer-coupled circuit 2 inputs in safe range.

Since in HID two ends parallel connections two-way TVS1 clamp diode, effectively protected HID to manage triggering, prolonging lamp tube service life.At the elementary parallelly connected TVS2 of T1 transformer, make underarm on the half-bridge MOSFET to more effective protection, unusual or when triggering failure when output, TVS2 can be with the control of Electric potentials of N1 end within safety 2.The measured result demonstration should be invented safe and reliable, and light efficiency improves.

A kind of self-excited oscillation type high-frequency electronic generator course of work of the utility model is: transformer-coupled circuit 2 has two secondary coil N2, the N3 of primary coil N1 and coupling with it; The trigger impulse that circuits for triggering 1 produce is coupled to two secondary coil N2, N3 through the primary coil N1 of transformer; Two grids at two metal-oxide half field effect transistor Q1, Q2 form two induced voltages that phase place is opposite, amplitude equates; Make 3 conductings in turn of resonance match circuit; Produce ' drawing ', ' fillings ' electric current, and export described high-voltage gas discharging light 6 near the square wave of 400V in the mid point generation amplitude of metal-oxide half field effect transistor Q1, Q2.

The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection range of the utility model.

Claims

1. self-excited oscillation type high-frequency electronic generator; Comprise that the half-bridge that links to each other with the impressed current input current starts the formula circuits for triggering; The transformer-coupled circuit that links to each other with described circuits for triggering, the resonance match circuit that links to each other with described transformer-coupled circuit, described resonance match circuit links to each other with high-voltage gas discharging light; It is characterized in that; Described resonance match circuit is connected in series mutually by two metal-oxide half field effect transistors and forms, and the drain electrode of described two metal-oxide half field effect transistors all links to each other with circuits for triggering, and grid all links to each other with described transformer-coupled circuit.

2. self-excited oscillation type high-frequency electronic generator according to claim 1; It is characterized in that; Described self-excited oscillation type high-frequency electronic generator also comprises filter circuit; Be connected between described resonance match circuit and the described high-voltage gas discharging light, be used for described resonance match circuit is carried out filtering.

3. according to each described self-excited oscillation type high-frequency electronic generator of claim 1 to 2, it is characterized in that described high-voltage gas discharging light two ends are provided with two-way clamp diode, be used for exporting described high-voltage gas discharging light protection in safe range.

4. according to each described self-excited oscillation type high-frequency electronic generator of claim 1 to 2; It is characterized in that; Described transformer-coupled circuit input is provided with two-way clamp diode, is used for the voltage protection that exports described transformer-coupled circuit input in safe range.

5. self-excited oscillation type high-frequency electronic generator according to claim 1; It is characterized in that; Two secondary coils that described transformer-coupled circuit has primary coil and is coupled with it; The trigger impulse that described circuits for triggering produce is coupled to two secondary coils through the primary coil of transformer, forms two induced voltages that phase places are opposite, amplitude equates at two grids of described metal-oxide half field effect transistor, makes described resonance match circuit take turns conducting; Produce ' drawing ', ' fillings ' electric current, and export described high-voltage gas discharging light near the square wave of 400V in the mid point generation amplitude of described metal-oxide half field effect transistor.