JPH04103631U - Choke coil for large current - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a large current choke coil that is easy to assemble and has a large noise reduction effect. [Structure] A large current choke coil having a busbar attached in parallel to a mounting body such as a printed circuit board or a casing of a power supply device, and a core attached to the busbar,
The bus bar is bent into a convex shape with respect to the mounting body, and an EI type, E type is formed between the bent portion and the mounting body.
It is characterized by having a comb-teeth part inserted between core shapes such as E-type and C-type.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a large current choke coil suitable for use in a power supply device that handles large currents. In particular, the present invention relates to improvements in structures that efficiently reduce noise.

0002

[Conventional technology]

For noise reduction in a power supply device, for example, Utility Model Application Publication No. 1-1622 proposed by the present applicant is used. There is one disclosed in Publication No. 27. In such equipment, the output line is installed to reduce ripple and noise.

0003

[Problem that the idea aims to solve]

However, in a large-capacity power supply, the power supply line becomes thick due to the allowable current. do Due to heat capacity and other factors, soldering is no longer possible, so screw tightening using crimp terminals, etc. connection is required. This takes time to connect the wires, which increases the manufacturing cost of the power supply device. The problem was that the number of people was increasing. This invention solves these problems and is easy to assemble and has a large noise reduction effect. The purpose of this invention is to provide a large current choke coil.

0004

[Means to solve the problem]

The present invention, which achieves these objectives, is designed to improve the mounting of printed circuit boards and casings of power supplies. It has a busbar attached parallel to the attached body and a core attached to this busbar. This is a large current choke coil with the following configuration. That is, while bending the bus bar into a convex shape with respect to the mounting body, A comb of core shapes such as EI type, EE type, and C type is inserted between the bent part and the mounting body. It is characterized by the insertion of teeth.

[Effect]

Each component of the present invention operates as follows. Bend the busbar into a convex shape and is attached to this bent part to function as a choke coil. Busbar is installed Since it is fixed to the body, there is no need to connect choke coils that are associated with noise countermeasures. Become.

[0005]

【Example】

The present invention will be explained below using the drawings. FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is a sectional view of the main parts. In the diagram The printed circuit board 10 is a component of a power supply device, and is used to stabilize the output voltage. A capacitor 40 is installed. Bus bar 20 is parallel to the surface of printed circuit board 10 Here, it is screwed with a screw 12. Bus bar 20 is A conductor made of metal such as copper that has high rigidity and is not used for carrying large currents without insulation. Here, a set of two is used for the positive and negative electrodes. The bent portion 22 is a bus bar. 20 is bent into a convex shape relative to the printed circuit board 10, here it is bent into a U-shape. It has become. The core 30 is of the EE type and is placed horizontally on the printed circuit board 10. magnetically coupled with the bus bar 20. The comb tooth portion 32 is the middle tooth of the E-shaped core. and is inserted into the bent portion 22 to form a closed magnetic circuit together with the paired E-shaped core. ing.

[0006] FIG. 3 is an equivalent circuit diagram of the device of FIG. Capacitor C has positive and negative outputs on the output line. Connected between the power lines, choke coil L1 is connected to the positive line, and choke coil L1 is connected to the negative line. Cu coil L2 is inserted.

[0007] The assembly work for the device configured in this way will be described next. Bend the bus bar 20 Then, the bent portion 22 is formed and screwed to the printed circuit board 10. Next, comb tooth part 3 2 into the bent portion 22 to attach the core 30 to the printed circuit board 10.

[0008] In addition, in the above embodiment, a printed circuit board is used to attach the bus bar 20. 10 is illustrated, but the present invention is not limited to this, and can be applied to power supply casings, etc. Other mounting bodies may also be used. In addition to the EE type, the core shape also includes EI type and C type. Any material having a comb tooth portion 32 that can be attached to the bent portion 22 may be used.

[0009]

[Effect of the idea]

As explained above, the present invention has the following practical effects. Since the busbar 20 acts as a choke coil, in the case of a conventional coil The previously required wiring work is no longer required, and there are no seams in the output line conductor. This eliminates loss due to contact resistance. As in the embodiment, when the core 30 is placed horizontally with respect to the mounting body, the center of gravity of the core will be lower and earthquake resistance will be better.

[Brief explanation of drawings]

FIG. 1 is a structural perspective view showing an embodiment of the present invention.

FIG. 2 is a sectional view of a main part of the device in FIG. 1;

FIG. 3 is an equivalent circuit diagram of the device of FIG. 1;

[Explanation of symbols]

10...Printed circuit board (mounting body) 20...Bus bar 22...Bending part 30...Core 32...Comb teeth part

Claims (1)

[Scope of utility model registration request] 1. A large current choke coil comprising a busbar attached in parallel to a mounting body such as a printed circuit board or a casing of a power supply device, and a core attached to the busbar. is bent into a convex shape with respect to the mounting body, and there is an EI between this bent part and the mounting body.
A large current choke coil characterized by inserting a comb-teeth part into a core shape such as type, EE type, or C type.