JPH03239136A - Feeder system - Google Patents

Abstract

PURPOSE:To improve safety, to lower leakage flux and to reduce noises by forming insulating sections to the opposed surfaces of a primary coil and secondary coil and covering the peripheries of the primary coil and the secondary coil with a package having low reluctance. CONSTITUTION:Insulating sections 6a, 6b are formed on each opposed surface in the primary coils 4a and secondary coils 4b of an output transformer. The peripheries of the primary coils 4a and the secondary coils 4b except the opposed surfaces are covered with packages 7a, 7b having low reluctance or electric resistance. A parting plate 9 installed on the rear side of a discharge lamp 5 functions as a metallic reflecting plate, and reflects the light of the discharge lamp 5 to the outside. A surface cover 8 is mounted outside the discharge lamp 5, and formed of a material having the excellent transmitting properties of light.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a power supply device that supplies high-frequency power to a discharge lamp load on the next side of an output transformer by electromagnetic induction.

(Prior Art) FIG. 6 is a partially cutaway diagram showing the configuration of a conventional electric discharge power supply device disclosed in, for example, Japanese Patent Application Laid-Open No. 56-147380. In the figure, 4a and 4b are a primary coil and a secondary coil that constitute the output lance, where the secondary coil 4a is not provided on the socket side, and the secondary coil 4b is provided on the discharge lamp 5 side. . 13a is a lamp receiving part on the socket side, and 13b is a socket mounting part on the discharge lamp 5 side.

-1- The primary coil 4a on the socket side is connected to an AC power source (not shown), and the mounting part 13b is screwed onto the lamp receiving part 13a, and the discharge lamp 5 is inserted into the socket.
When the output transformer is turned on, high frequency power is induced in the secondary coil 4a and the secondary coil 4b forming an output transformer. Then, this induced power is supplied to the discharge lamp 5, and the discharge lamp 5 is turned on. In addition, if the discharge lamp 5 is removed from the socket, the discharge lamp 5
goes out.

In the device configured in this manner, electric power is supplied by electromagnetic induction, so accidents such as electric shock are prevented and safety is high.

[C Invention or J Problem to be Solved] Although the conventional power supply device is configured as shown below, there are problems in that it is not very safe, but it leaks a lot of magnetic flux and generates a lot of noise.

This invention was made to solve the above-mentioned problems, and has high safety, low magnetic flux leakage, and
The objective is to obtain a power supply device that can reduce noise.

[Means to solve problem J]

The power supply device according to the present invention provides insulating parts with high electrical resistance on the opposing surfaces of the primary coil and the secondary coil of the output transformer of an inverter that generates high-frequency power, and also provides the primary coil and the secondary coil of the output transformer. is covered with an envelope made of a material with low magnetic resistance or electrical resistance except for the facing surface, and the electric power induced in the secondary coil of the output transformer is supplied to a discharge lamp load connected to the secondary coil. It is composed of

(Function) In the power supply device of the present invention, power is transmitted from the primary coil, which has insulating parts on each facing surface, to the secondary coil by electromagnetic t+ conduction, and this power is transmitted to the discharge lamp load connected to the secondary coil. At this time, leakage of magnetic flux is suppressed because the secondary coil and the secondary coil are covered with an envelope having low magnetic resistance or electrical resistance.

(Embodiment) Fig. 1 is a block diagram showing a first embodiment of the present invention, and the same reference numerals as in Fig. 6 indicate the same components.In the figure, 4a and 4b constitute an output transformer. 5 is a discharge lamp which is a load connected to the secondary coil 4b, and 6a and 6b are the secondary coils 4a.
and the insulating parts provided on the opposing surfaces of the secondary coil 4b, respectively, and are made of a material with high electrical resistance. 7a.

Reference numeral 7b denotes an envelope that covers the primary coil 4a and the secondary coil 4b except for the opposing surfaces, and is made of a material with low magnetic resistance or electrical resistance. Reference numeral 8 denotes an outer surface cover of the discharge lamp 5, which is made of a material with good light transmittance.

Reference numeral 9 denotes a partition plate that partitions the secondary coil 4b and the discharge lamp 5 in the secondary side envelope 7b, and also serves as a metal reflection plate that reflects the light of the discharge lamp 5 to the outside.

FIG. 2 is a circuit diagram of the above device. In the figure, 1 is an AC power supply, 2 is a rectifier circuit that converts the AC into DC, 3 is an inverter that converts the output of the rectifier circuit 2 back to AC, 4 is an output transformer of the inverter 3, and the secondary coil 4a is the inverter. 3 is connected.

The inverter 3 is equipped with a switching element, its drive control circuit, etc., and causes the output transformer 4 to generate high-frequency power. This high frequency power, that is, the high frequency power induced in the secondary coil 4b of the output transformer 4, is supplied to the discharge lamp 5 connected to the secondary coil 4b, thereby lighting the discharge lamp 5.

Here, the primary coil 4a and the secondary coil 4b of the output transformer 4 are provided with insulating parts 6a and 6b on their opposing surfaces, and power is supplied by electromagnetic induction, so accidents such as electric shock are prevented. In addition, since the surroundings of the secondary coil 4a and the secondary coil 4b except for this opposing surface are covered with envelopes 7a and 7b with low magnetic resistance or electrical resistance, there is little leakage magnetic flux. , noise can be reduced. Furthermore, a partition plate 9 provided on the rear side of the discharge lamp 5
Since it has a metal reflector, it can be used to create bright lighting equipment.

FIG. 3 is a block diagram showing a second embodiment of the present invention, and FIG. 3(a) shows the configuration of the secondary side of the output transformer 4, and FIG.
b) shows the configuration on the front cover side.

In this embodiment, the front cover 8 of FIG. 1 is replaced with a metal mesh 1.
Even with such a configuration, the same effects as in the above embodiment can be obtained.

Further, FIG. 4 is a configuration diagram showing a third embodiment of the present invention. In this embodiment, a transformer 11 is provided to cause the discharge lamp 5 to discharge without electrodes. Further, like the embodiment shown in FIG. 3, a metal mesh 10 is used for the front cover. FIG. 5 shows the configuration of the electric circuit.

As described above, by causing the discharge lamp 5 to discharge without electrodes, maintenance becomes free, and lamp replacement becomes unnecessary. Therefore, the surface cover of the discharge lamp 5 made of the metal mesh 10 or the like can have a waterproof structure.

(Effects of the Invention) As described above, according to the present invention, an insulating portion is provided on the opposing surfaces of the primary coil and the secondary coil that constitute the output transformer,
In addition, the primary and secondary coils, excluding the facing surfaces, are covered with an envelope with low magnetic resistance or electrical resistance, and power is transmitted from the secondary coil to the secondary coil by electromagnetic induction and supplied to the discharge lamp load. This not only prevents accidents such as electric shock and is highly safe, but also has low magnetic flux leakage.
This has the effect of reducing noise.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing a first embodiment of the present invention, FIG. 2 is a circuit configuration diagram of the same as the above, and FIG. 3(a). (b) is a block diagram showing a second embodiment of the invention, FIG. 4 is a block diagram showing a third embodiment of the invention, FIG. 5 is an electric circuit diagram of the same, and FIG. 6 is a diagram showing a conventional device. FIG. 1... AC power supply 2... Rectifier circuit 3... Inverter 4... Output transformer 4a... - Next coil 4b...・Secondary coil 5...Discharge lamp 6a, 6b...Insulation section 7a, 7b...Envelope 8...Surface cover 9... . . . Partition plate 10 . . . Metal mesh 11 . . . Transformer Note that the same reference numerals in the drawings indicate the same or equivalent parts.

Claims (1)

[Claims] Insulating parts with high electrical resistance are provided on the opposing surfaces of the primary coil and secondary coil of the output transformer of the inverter that generates high-frequency power, and the primary coil and secondary coil of this output transformer are magnetically resistive except for the opposing surfaces. Alternatively, a power supply device is characterized in that it is covered with an envelope made of a material with low electrical resistance, and the power induced in the secondary coil of the output transformer is supplied to a discharge lamp load connected to the secondary coil.