JPS5848825Y2 - DC power supply - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a DC power supply device used in equipment that carries out communication by transmitting high frequency energy onto a power supply line.

The present invention is effective and has many advantages when used, for example, in a DC power supply device such as a wireless telephone that carries a carrier wave on a power supply line to make a telephone call.

Conventionally, this type of equipment has had a power transformer inside the equipment body and a rectifier circuit that converts alternating current to direct current.

Therefore, when exporting to the United States, it was necessary to obtain UL approval.

In addition, even if the appearance or circuit is slightly different, each model has UL certification.
required approval.

These procedures were extremely troublesome in terms of procedures and costs.

Focusing on this point, this proposal separates the DC power supply section from the main body, and uses a choke to prevent carrier waves from going to the coupling condenser and DC power supply section so that the carrier wave can be easily placed on the power supply line for the DC power supply device. It is characterized by the arrangement of coils.

By using this power supply for all models, there is no need to obtain UL approval for each model, and you only need to obtain UL approval for one model of the DC power supply that can be used for various models, speeding up delivery times and reducing costs. The object of the present invention is to provide a DC power supply device that enables the following.

An embodiment of the present invention will be sequentially described with reference to the drawings.

FIG. 1 shows a connection diagram of the present invention, and FIG. 2 is a schematic connection diagram showing a connection situation with a device such as a wireless telephone that uses a carrier wave on a power line.

12 is the DC power supply device of the present invention, and 1 and 2 are the D of the present invention.
C indicates the input terminals of the power supply device, and the ends of input terminals 1 and 2 are connected to a commercial power source (AC 100V 50/60L) outlet.

Reference numerals 10 and 11 are output terminals to which a predesigned DC voltage is output.

9 is an AC-DC converter which may be of any type.

The most popular type is a rectifier circuit that combines a rectifier and a capacitor.

The input and input terminals 1 and 2 of this AC-DC converter 9
Choke coils 3 and 4 are connected between them, and choke coils 5 and 6 are also connected between the output of the AC-DC converter 9 and output terminals 10 and 11.

3, 4, and 5.6, the inductance is the same, and the value is selected to block the carrier frequency carried on the power supply line.

Further, capacitors 7 and 8 are connected between terminals 1 and 10 and between terminals 2 and 11.

This allows the carrier wave to pass through. A portion 25 surrounded by a dashed line in FIG. 2 is a schematic connection diagram of the main body of the wireless telephone.

Terminals 26 and 27 represent the DC power input terminals of the wireless telephone.

Reference numeral 15 denotes a transmitting section that generates a carrier wave frequency, and its output is transmitted to a secondary winding 17 via a primary winding 16 of an output transformer 18.

The capacitors 21 and 22 operate as direct current cutting capacitors, and form a series resonant circuit with the inductance 19 and 20 for the carrier frequency, thereby playing the role of an impedance converter.

The inductance 13.14 is a choke coil similar to the 3.degree. 4.5.6, and is inserted so that the carrier wave is not attenuated at the 10B line terminal 24.

The 10B terminal 24 is supplied with power to other parts not shown.

If the wireless telephone body 25 has a slightly different appearance and circuit (the DC power supply voltage is the same), the DC power supply device 12
If the wireless telephone main body 25 is a different model, the DC power input terminals 26 and 27 can be
If the terminals 10 and 11 of the C power supply device 12 are connected and used, there is no need for UL approval of the wireless telephone main body 25, and the associated effort and expense can be considerably reduced.

[Brief explanation of drawings]

FIG. 1 is a schematic connection diagram of a DC power supply device which is an embodiment of the present invention, and FIG. 2 is a connection diagram showing the connection status between the power supply device of the present invention and a device that uses a carrier wave on a power line. Here 9... AC-DC converter, 1, 2
...Input terminal, 10.11...Output terminal, 3, 4, 5.6...Inductance, 7,
8... Container.

Claims (1)

[Scope of utility model registration request] A power supply device for equipment that performs communication by carrying a carrier wave on a power line, comprising an AC-DC converter, a pair of input terminals to which a commercial power supply voltage is supplied, and a pair of output terminals from which the output of the ACDC converter is output. Respective inductances for carrier blocking connected between the input terminal and the input of the AC-DC converter and between the output terminal and the output of the AC-DC converter, and a pair of opposing input terminals and the output terminals. A DC power supply device comprising a capacitor connected between the capacitors and passing a carrier wave.