JPH04290410A - Electromagnetic apparatus - Google Patents

Abstract

PURPOSE:To entirely miniaturize and lighten the case body for storing electromagnetic apparatus and a capacitor. CONSTITUTION:An electromagenetic body 10 and a storage case 23, wherein capacitors 16 and 18 are arranged, are stored in a case body 26 in which to charge resin 28. In the storage case 22, an engaging part 23 to be set on the iron core 11 of the electromagnetic appratus 10 is made. The heat from the electromagnetic apparatus 10 is not connected to capacitors 16 and 18 by charged resin 28. The case body 26 can be miniturized and lightened by lessening the space between the electromagnetic appratus 10 and the capacitors 16 and 18. The capacitors 16 and 18 are protected mechanically, and the storage case 22 is positioned and retained in the electromagnetic apparatus 10, and automatic assembling also becomes possible.

Description

[Detailed description of the invention]

[Object of the invention]

0002

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic device in which a main body of an electromagnetic device, such as a ballast for a discharge lamp, and a capacitor, such as a power factor correction capacitor or a noise prevention capacitor, are incorporated into one case.

0003

[Prior Art] As shown in FIG. 4, an electromagnetic device such as a ballast for a discharge lamp of this type includes an electromagnetic device main body 4 consisting of an iron core 2 and a coil 3 in a case body 1; 4
A power factor correction capacitor 5, a noise prevention capacitor 6, and a discharge resistor 7 connected to the casing body 1 are filled with resin 8, and the electromagnetic equipment body 4, capacitors 5, 6, and resistor 7 are filled with the resin 8. The structure is such that it is buried inside the building.

0004

[Problems to be Solved by the Invention] In the electromagnetic equipment having the structure shown in FIG. Since the temperature is considerably lower than 120 degrees Celsius, the capacitors 5 and 6 must be housed in the case body 1 at a distance so as not to be affected by the temperature of the electromagnetic device body 4, and as a result, the case body 1 becomes large. There is an unavoidable problem of increase in size and weight, and this tendency is particularly noticeable in capacitors that are not housed in an external case.Moreover, their mechanical strength is low, which is an obstacle to automatic assembly. .

The present invention has been made in view of the above-mentioned problems, and allows the capacitor to be disposed close to the main body of the electromagnetic device, and allows the case body that houses the main body of the electromagnetic device and the capacitor to be made small, thereby reducing the overall size. The present invention provides electromagnetic equipment that can be made lighter.

[Configuration of the invention]

[0007]

[Means for Solving the Problems] The electromagnetic device of the present invention includes an electromagnetic device main body consisting of an iron core and a coil attached to the iron core, a capacitor connected to the electromagnetic device main body, and a capacitor connected to the electromagnetic device main body. and a case body in which the capacitor is housed and filled with resin, the capacitor is isolated from the filled resin in a storage case that forms a fitting part to be fitted to the iron core of the electromagnetic device body, and is disposed inside the case body. It was then stored.

[0008]

[Operation] In the electromagnetic device of the present invention, the capacitor is housed in a storage case and is isolated from the filled resin, and this storage case is held in the electromagnetic device body by fitting the fitting part into the iron core of the electromagnetic device body. Since the capacitor is placed in an air space inside the storage case, heat from the electromagnetic device body is not conducted to the capacitor by the filled resin, and the distance between the electromagnetic device body and the capacitor can be reduced and the distance between the capacitor and the electromagnetic device body can be reduced. This allows the electromagnetic equipment main body and the capacitor to be made smaller and lighter.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of an embodiment of the present invention will be described with reference to FIGS. 1 to 3 regarding a discharge lamp ballast.

Reference numeral 10 denotes an electromagnetic device body consisting of an iron core 11 and a coil 12 attached to the iron core 11.
2 is wound around the coil bobbin 13.
It is connected to the terminal piece 15 of the terminal block section 14 formed at 3.

Reference numeral 16 denotes a power factor improvement capacitor, to which a lead wire 17 is connected to the terminal piece 15. Reference numeral 18 denotes a noise prevention capacitor which also serves as a resonance capacitor during startup, and a lead wire 19 is connected to the terminal piece 15. is connected, and furthermore, 20
A discharge resistor is connected to the terminal piece 15 so that a lead wire 21 is connected in parallel with the power factor improving capacitor 16.

Reference numeral 22 denotes a storage case that houses the power factor improvement capacitor 16, the noise prevention capacitor 18, and the discharge resistor 20, and is made of synthetic resin into a rectangular housing shape with an opening at the top and the electromagnetic capacitor at the side. Iron core 11 of device body 10
A fitting portion 23 that fits into the end portion of is integrally formed. In addition, a lid 24 made of synthetic resin that closes the upper opening of the storage case 22 has a lead wire 17 of the power factor improvement capacitor 16, a lead wire 19 of the noise prevention capacitor 18, and a discharge resistor 20. An insertion hole 25 is formed through which the lead wire 21 is inserted. And this lid body 2
4 is held in a closed state by adhering to the opening of the storage case 22 with an adhesive, screwing, or depending on the shape of the storage case, by screwing or engaging with an uneven portion.

Reference numeral 26 denotes a case body formed of a metal plate or the like, and openings at both ends thereof are closed by end plates 27 from which the terminal pieces 15 are guided outward. This case body 26 accommodates the electromagnetic device main body 10 and a storage case 22 in which a fitting portion 23 is fitted to the iron core 11. The case body 26 is filled with a relatively high viscosity resin 28, such as a polyester resin containing silica powder, for example.
The electromagnetic device main body 10 and the storage case 22 are embedded in this filling resin 28. Since the resin 28 has a high viscosity, even if the lid 24 does not tightly seal the opening of the storage case 22, a large amount of the resin 28 will not enter into the storage case 22.

Next, the operation of this embodiment will be explained.

Since the power factor improvement capacitor 16, the noise prevention capacitor 18 and the discharge resistor 20 are housed in the storage case 22 and housed in the case body 26, the power factor improvement capacitor 16, the noise prevention capacitor 18 and The discharge resistor 20 is isolated from the resin 28 filled in the case body 26 and is arranged in an air space inside the storage case 22, so that the heat from the electromagnetic device main body 10 is conducted through the resin 28 and heated. Therefore, the electromagnetic device main body 10 and the storage case 22 can be brought close to each other, and the case body 26 can be made small. In addition, since the case body 26 can be made small, the resin 2 to be filled can be
The amount of 8 is also reduced, making it lightweight. Furthermore, each capacitor 1
6, 18 and the resistor 20 are arranged in an air layer and do not come into contact with the outside air, increasing reliability. Furthermore, since each of the capacitors 16, 18 and the resistor 20 are arranged within the storage case 22, they are mechanically protected during internal wiring, and inexpensive capacitors and resistors without an insulating case can be used.

The storage case 22 also contains the electromagnetic device main body 10.
Since the fitting part 23 is fitted to the iron core 11 of the storage case 2
2 can be held in position, making automated assembly easy. Moreover, this fitting part 23 can also serve as an end cap of the iron core 11.

The power factor improving capacitor 1 is inserted into the insertion hole 25 of the lid 24 that closes the upper opening of the storage case 22.
Since the lead wire 17 of No. 6, the lead wire 19 of the noise prevention capacitor 18, and the lead wire 21 of the discharge resistor 20 are inserted, the lid body 24 functions as an insulating plate, and the lead wires 17, 1
9 and 21 are prevented from coming into contact with each other, and the lead wire 1
There is no need to insulate 7, 19, 21 with an insulating tube or the like, and the terminal piece 25 and lead wires 17, 19, 2
Even if there is a difference in pitch from 1, there is no risk of short circuits.

The fitting portion 23 of the storage case 22 may be closed or communicated with the interior.

[0019]

Effects of the Invention According to the present invention, a capacitor is disposed within a storage case in which a fitting portion is formed to be fitted into the iron core of an electromagnetic device body, and the capacitor is disposed within this storage case. Since the capacitor is housed in the case together with the main body and is isolated from the resin filling, the capacitor is placed in an air space within the storage case, and the heat from the electromagnetic device body is not conducted to the capacitor by the resin filling. The distance between the electromagnetic device and the capacitor can be reduced to allow closer access, the case can be made smaller, and the amount of resin filled can be reduced, making it lighter in weight.Since the capacitor is placed inside the storage case, it can be easily accessed by the machine. Furthermore, the storage case is positioned and held on the core of the electromagnetic device, making automated assembly possible.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view of a part of an electromagnetic device showing an embodiment of the present invention.

FIG. 2 is a perspective view of a storage case for the electromagnetic device.

FIG. 3 is a perspective view of the lid of the storage case.

FIG. 4 is a longitudinal sectional front view of a part of a conventional electromagnetic device.

[Explanation of symbols]

10　　　　Electromagnetic equipment body 11 Iron core 12 Coil 16, 18 Capacitor 22 Storage case 23 Fitting part 26 Case body 28 Filled resin

Claims (1)

[Claims] [Claim 1] An electromagnetic device main body consisting of an iron core and a coil attached to the iron core, a capacitor connected to the electromagnetic device main body, and a case body that houses the electromagnetic device main body and the capacitor and is filled with resin. An electromagnetic device, characterized in that the capacitor is housed in a storage case that forms a fitting part that fits into the iron core of the electromagnetic device body and is disposed inside the case body, separating the capacitor from the filling resin. .