CN201051490Y

CN201051490Y - Electromagnetic induction no polarity light source

Info

Publication number: CN201051490Y
Application number: CNU2007201511457U
Authority: CN
Inventors: 任文华
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-06-04
Filing date: 2007-06-04
Publication date: 2008-04-23
Anticipated expiration: 2017-06-04

Abstract

The utility model relates to an electromagnetic induction non-polar light source, and comprises an electrode-less lamp, a first transformer iron core, a second transformer iron core, a first coil winding, a second coil winding, and a radio-frequency power supply. The utility model is characterized in that the electrode-less lamp comprises a tubular lamp shell which forms a closed path, mercury and inert gases are contained in the lamp shell, a fluorescent coating layer is arranged on the inner surface of the lamp shell, the first transformer iron core and the second transformer iron core are arranged round the lamp shell, the first coil winding is formed by the serial connection of a first induction winding which is wound on the first transformer iron core and two starting windings which are wound on the lamp shell, the circle number of the starting winding is between 1 circle and 20 circles, at least partial windings of the second coil winding are wound on the second transformer iron core, and the radio-frequency power supply, the first coil winding, and the second coil winding are connected to form an input winding for being electrically connected. The utility model is characterized by fast starting speed, strong starting capacity, and simple auxiliary starting devices and the like.

Description

The electromagnetic induction electrodeless light source

Technical field

The utility model relates to glow discharge spot lamp, particularly the electrodeless light source of electromagnetic induction discharge.

Background technology

It from the patent No. 96191079.8 the known this electrodeless light source of Chinese patent.This kind electrodeless light source, comprise: electrodeless lamp, it comprises the tubular lamp shell that constitutes the closed-loop path, described lamp housing comprises two parallel pipes, near an end of two parallel pipes or its, link to each other with the first side pipe, near the other end of two parallel pipes or its, link to each other, thereby constitute the closed-loop path, be filled with the inert gas that pressure is lower than the mercuryvapour of 0.5 torr and plays the buffer gas effect in the lamp housing with the second side pipe; First transformer core and second transformer core around described lamp housing placement; Be separately positioned on the induction winding of first on described first transformer core and second transformer core and the second induction winding; Be coupled to the radio-frequency power supply of the described first induction winding and the second induction winding, be used for enough high-frequency energies are supplied with described mercuryvapour and described inert gas, so that in described lamp housing, produce the discharge that discharging current is equal to or greater than 2A; And the frequency of wherein said radio-frequency power supply is in the scope of 50KHz to 3MHz.In this kind electrodeless light source, in order to start smoothly, on the outer surface of described lamp housing, be provided with conductive strips as auxiliary actuating apparatus, these conductive strips are electrically connected with an output of radio-frequency power supply, so that the output voltage of radio-frequency power supply can be applied on the conductive strips, with the capacitive discharge of gas in the excitation lamp housing.The placement of this kind conductive strips is fixed and is electrically connected comparatively complexity, is unfavorable for producing in batches.The assistant starting effect of this kind conductive strips is also very limited in addition, and is long when the discharge loop of lamp housing, particularly the inflation in lower, the lamp housing of ambient temperature is pressed when higher, and this kind light source just is difficult to smooth startup.

Have been found that, the start-up course of this kind electrodeless light source roughly is such, the discharge breakdown of gas at first is that capacitive discharge by gas in the lamp housing causes in the lamp housing, just carry out the transition to inductively coupled discharge then, the puncture that is gas at first is the E type discharge of axial electric field, just carries out the transition to the H type discharge of induction field then.And the size of capacitive discharge and axial electric field and discharge capacity is big or small closely related, the axial electric field that applies is big more and capacity discharge capacity is big more, the intensity that is easy to generate capacitive discharge more and is produced is just strong more, the toggle speed of its light source is just fast more, and the startup ability of its light source is just strong more.The size of axial electric field is directly proportional with the voltage that applies, and the voltage that applies is normally provided by radio-frequency power supply, usually the output circuit of radio-frequency power supply provides the high pressure of its resonance when starting, and the high pressure of this resonance is by producing axial electric field in the gas of certain mode in lamp housing.If the toggle speed of electrodeless light source is fast more, just helps prolonging the life-span of radio-frequency power supply more, thereby prolong the life-span of whole electrodeless light source.

Summary of the invention

The purpose of this utility model is to provide that a kind of toggle speed is fast, the startup ability is strong and the simple electromagnetic induction electrodeless light source of auxiliary actuating apparatus.

In order to achieve the above object, the utility model adopts following technical scheme: according to the utility model, the electromagnetic induction electrodeless light source comprises:

Electrodeless lamp, it comprises the tubular lamp shell that constitutes the closed-loop path, and lamp housing contains mercury and inert gas, and the inner surface of lamp housing is provided with fluoresent coating;

First transformer core and second magnetic core of transformer are all placed around described lamp housing;

First coil windings, form by two startup windings in series that are wound in the induction winding of first on described first transformer core and be wound on the described lamp housing, the described first induction winding is serially connected with described two and starts between the winding, and the number of turns of described each startup winding is between 1 circle encloses to 20;

Second coil windings has at least part second coil windings to be wound on described second transformer core;

Radio-frequency power supply is electrically connected with the input winding that is formed by connecting by first coil windings, second coil windings, is used to provide radio-frequency (RF) energy.

Described second coil windings can all be wound on described second transformer core, and promptly described second coil windings is only constituted by being wound in the induction of second on described second transformer core winding.

Described second coil windings can by be wound in second on described second transformer core induction winding and be wound on the described lamp housing in addition two start windings in series and form, the described second induction winding is serially connected with described in addition two start between the windings.

Connection between described first coil windings, second coil windings can be series connection, also can be in parallel.

The frequency of described radio-frequency power supply is between 50KHz to 3MHz, usually between 100KHz to 400KHz.The number of turns of described each startup winding is generally selected in 2 circles between 8 circles.Described coil windings adopts multi cord to come coiling usually.

Described startup winding be wound in usually described transformer core around the lamp housing place, also can be wound in described transformer core around lamp housing near.

The tubular lamp shell of described formation closed-loop path comprises two parallel pipes, links to each other with the first side pipe near an end of two parallel pipes or its, near the other end of two parallel pipes or its, link to each other with the second side pipe, thus the formation closed-loop path.

The tubular lamp shell of described formation closed-loop path can be made of two straight tubes of two U type tubular lamp shells and two U type tubular lamp shells of connection, and two U type tubular lamp shells are not in the same plane, and described like this electrodeless lamp just has closed three-dimensional contouring.

The aperture size of described lamp housing is usually between 10mm to 80mm.On described lamp housing, can be provided with and expose the less insede exhaust pipe of size, the better simply external blast pipe of manufacture craft also can be set.

Described mercury and inert gas.Its mercury can be liquid mercury, also can be solid-state mercury, and as amalgam, its amalgam can be arranged in the blast pipe; Its inert gas can be inert gas and their mixtures such as argon, krypton.

Described transformer core can adopt loop configuration, also can adopt other structure.The used material of its transformer core adopts Ferrite Material usually, can select MnZn ferrite material as required for use, also can select nickel-zinc-ferrite material for use; Its transformer core preferably is cut into two, and the position, hole of cutting its transformer core of back is opened wide, so that described lamp housing can conveniently be put into the Kong Weizhong of transformer core, each end of the transformer core that is cut open is ground smoothly.

The utlity model has following good effect:

The utility model is provided with at least two and starts winding, described startup winding directly is wound on the described lamp housing, tight with contacting of lamp housing, and two spacings that start between the winding are less, can produce very big axial electric field in the gas in lamp housing like this, and two startup windings that are provided with like this, the electric capacity of its capacitive discharge is also bigger, therefore the utility model not only is easy to generate capacitive discharge, and can produce very strong capacitive character generating, improved the toggle speed and the startup ability of light source greatly.On described lamp housing, directly reel to start winding in addition as auxiliary actuating apparatus, its make simple, cost is very low, help improving its production efficiency and reduce cost.

Description of drawings

Fig. 1 is the schematic diagram of electromagnetic induction electrodeless light source of the present utility model;

Fig. 2 has showed second embodiment of electromagnetic induction electrodeless light source of the present utility model;

Fig. 3 has showed another embodiment of electromagnetic induction electrodeless light source of the present utility model.

Embodiment

Fig. 1 is the schematic diagram of electromagnetic induction electrodeless light source of the present utility model.The utility model comprises: electrodeless lamp, and it comprises the tubular lamp shell 1 that constitutes ring-shaped closed loop, and lamp housing contains mercury and inert gas argon, and the inner surface of lamp housing is provided with fluoresent coating; Be provided with first transformer core 2 and second magnetic core of transformer 7 around described lamp housing 1; On first transformer core 2, be provided with the first induction winding 4, and first transformer core around the lamp housing place be provided with two and start

windings

5,6, these two start winding and directly are wound on the described lamp housing, each number of turns that starts winding all is 5 circles, constituted first coil windings 3 by the first induction winding 4 and two startup winding 5,6 series connection, its first induction winding 4 is serially connected with two centres that start

windings

5,6; Second coil windings 8 only has one to be arranged on the induction of second on second magnetic core of transformer 7 winding 10; First coil windings 3 be connected on the radio-frequency power supply 9 after second coil windings 8 is in parallel.

When power connection, the output of radio-frequency power supply 9 provides the high pressure of a resonance, this high pressure is applied to two and starts on the winding 5,6, because these two spacings that start between the winding are less, therefore the high pressure of this resonance will produce very big electric field in the space near these two startup windings, make these two the rapid ionization punctures of gas that start near the lamp housing of winding, promptly cause the capacitive character generating rapidly; Two that are provided with so in addition start winding, and the electric capacity of its capacitive discharge is also bigger, causes the intensity of capacitive discharge also bigger.And such startup winding of reeling on lamp housing is simple, with low cost as its manufacture craft of auxiliary actuating apparatus.

Fig. 2 shows second embodiment of electromagnetic induction electrodeless light source of the present utility model.This embodiment is similar substantially to first embodiment shown in Figure 1, is that second coil windings 8, the connected mode that reaches first coil windings 3 and second coil windings 8 are different.Second coil windings 8 of present embodiment is to be in series by two the

startup windings

11,12 in addition that are wound in the induction of second on second transformer core 7 winding 10 and be wound on the described lamp housing, the second induction winding 10 is serially connected with between other two

startup windings

11,12, second coil windings 8 that is present embodiment has been set up a pair of startup winding, further improved the startup ability of light source, this starts the work particularly suitable for discharge loop than long lamp housing or under low temperature environment.In the embodiment shown in fig. 1, first coil windings 3 and second coil windings 8 are connected in parallel; And in the present embodiment, first coil windings 3 and second coil windings 8 are connected in series.

Fig. 3 shows the 3rd embodiment of electromagnetic induction electrodeless light source of the present utility model.In this embodiment, the lamp housing of described formation closed-loop path comprises two parallel pipes 13,14, end at two parallel pipes links to each other with first side pipe 15, links to each other with second side pipe 16 in the other end of two parallel pipes, thereby constitutes the closed-loop path of discharging.Be provided with first transformer core 2 around described first side pipe 15, be provided with second transformer core 7 around described second side pipe 16.On first transformer core 2, be provided with the first induction winding 4, and two the

startup windings

5,6 of on first side pipe 15, having reeled.Constituted first coil windings 3 by the first induction winding 4 and two startup winding 5,6 series connection, its first induction winding 4 is serially connected with two centres that start windings 5,6.Second coil windings 8 all is wound on second magnetic core of transformer 7, and promptly second coil windings 8 only has one to be arranged on the induction of second on second magnetic core of transformer 7 winding 10.First coil windings 3 is electrically connected with radio-frequency power supply 9 with second coil windings, 8 backs in parallel.

Although showed and described and thought preferred embodiment of the present utility model at present, apparent, those skilled in the art can carry out various changes and improvements, and does not deviate from the scope of the present utility model that is limited by appended claims.

Claims

1. electromagnetic induction electrodeless light source comprises:

Electrodeless lamp, it comprises the tubular lamp shell (1) that constitutes the closed-loop path, and lamp housing contains mercury and inert gas, and the inner surface of lamp housing is provided with fluoresent coating;

First transformer core (2) and second magnetic core of transformer (7) are all placed around described lamp housing;

First coil windings (3), be in series by two the startup windings (5,6) that are wound in the induction winding (4) of first on described first transformer core and be wound on the described lamp housing, the described first induction winding (4) is serially connected with described two and starts between the winding (5,6), and the number of turns of described each startup winding is between 1 circle encloses to 20;

Second coil windings (8) has at least part second coil windings to be wound on described second transformer core;

Radio-frequency power supply (9) is electrically connected with the input winding that is formed by connecting by first coil windings (3), second coil windings (8), is used to provide radio-frequency (RF) energy.

2. as the electromagnetic induction electrodeless light source that claim 1 limited, it is characterized in that described second coil windings all is wound on described second transformer core.

3. as electromagnetic induction electrodeless light source that claim 1 limited, it is characterized in that, described second coil windings by be wound in second on described second transformer core induction winding (10) and be wound on the described lamp housing in addition two start windings (11,12) and be in series, the described second induction winding is serially connected with between described two startup windings in addition.

4. as the electromagnetic induction electrodeless light source that claim 1 limited, it is characterized in that the frequency of wherein said radio-frequency power supply is between 50KHz to 3MHz.

5. as the electromagnetic induction electrodeless light source that claim 1 limited, it is characterized in that the number of turns of described each startup winding is between 2 circles enclose to 8.

6. as the electromagnetic induction electrodeless light source that claim 1 limited, it is characterized in that, described startup winding be wound in described transformer core around the lamp housing place.

7. as the electromagnetic induction electrodeless light source that claim 1 limited, it is characterized in that, described startup winding be wound in described transformer core around lamp housing near.

8. as electromagnetic induction electrodeless light source that claim 1 limited, it is characterized in that, described lamp housing comprises two parallel pipes (13,14), end at two parallel pipes links to each other with first side pipe (15), the other end at two parallel pipes links to each other with second side pipe (16), thereby constitutes the closed-loop path.

9. as the electromagnetic induction electrodeless light source that one of claim 1 to 8 limited, it is characterized in that the connection between described first coil windings, second coil windings is to be connected in parallel.

10. as the electromagnetic induction electrodeless light source that one of claim 1 to 8 limited, it is characterized in that the connection between described first coil windings, second coil windings is to be connected in series.