JPS62168454A - Calling signal power unit - Google Patents

Abstract

PURPOSE:To miniaturize the titled unit and to lighten a weight by generating a DC by using a high frequency, and generating the AC of a calling signal by an oscillator whose frequency is equal to that of the calling signal, and a semiconductor element. CONSTITUTION:An intermitting part 1 intermits a current by a battery B1, makes the intermittent current of a high frequency conduct to the primary side winding n1 of a transformer T1, and the AC of a high voltage required for a calling signal is induced in secondary windings n2, n3 of the transformer T1. This AC is rectified and smoothed by generating circuits 7, 8, and two DCs whose polarity is opposite to each other are generated. Semiconductors 2,3 inserted in series into each output of the generating circuits 7, 8 are controlled alternately at every half period by the sine wave output signal of a fundamental oscillator 4, and by this control, the outputs of the generating circuits 7,8, which becomes the currents of a sine half wave are superposed so as to become an opposite polarity to each other. In this way, since a voltage conversion by a high frequency is executed, the transformer can be made small in size and light in weight.

Description

[Detailed Description of the Invention] [Summary] High-frequency intermittent current generated by the intermittent section is converted into high-voltage alternating current by a transformer, and the alternating current is rectified to generate direct current with opposite polarity.2! 1Jl generation circuit is provided, a semiconductor element is inserted into each of the outputs of the two sets of generation circuits, and the element resistance is alternately controlled every half cycle by the output signal of the sine wave oscillator, so that the controlled generation By superimposing the outputs of the circuits so that the polarities are opposite to each other, AC power for the calling signal is obtained.

[Industrial application field]

TECHNICAL FIELD The present invention relates to an improvement in a ringing signal power supply device used in a switchboard.

Switchboards are becoming more sophisticated and multi-functional due to computerization, and are one of the driving forces behind office automation.

The call signal of the exchange uses low frequencies such as 1611z and 20Hz, so even if the power supply device is electronic, the transformer used is large and heavy and requires a special mounting position. It is desired to provide a calling signal power supply device that can be mounted on a printed board and mounted at any location.

[Conventional technology]

FIG. 3 is a circuit diagram of a conventional call-out No. 5 power supply device.

In the figure, transistors Q2.
Q3 is turned on and off alternately to transfer the current of battery B2 to the primary winding n4. of constant voltage transformer T2. Alternately stream to n5,
A required call signal voltage is obtained at the secondary winding n6 of the transformer T2.

[Problem that the invention seeks to solve]

Conventional circuits use a transformer with sufficient inductance at an oscillation frequency equal to the calling signal frequency, for example 20 Hz, resulting in a large and heavy device, and the device is mounted in a specific location such as the bottom of a storage rack. There are problems in that it requires space and a large volume.

[Means for solving problems]

FIG. 1 is a diagram showing the principle of the calling signal power supply device of the present invention.

Reference numeral 1 denotes an intermittent part that cuts off the current from the battery B1 and causes a high-frequency intermittent current to flow through the primary winding nl of the transformer T1, and the secondary winding n2 . 1 of the transformer T1. N3 is connected to two sets of generating circuits 7.8 which rectify and smooth the alternating current induced in the winding and generate direct current having opposite polarities.

Reference numeral 2.3 denotes a semiconductor element inserted into the outputs of the two sets of generating circuits 7 and 8, which are alternately controlled every half cycle by the sine pump 5 of the basic oscillator 4.

[Effect]

The interrupter 1 interrupts the current from the battery B1, causes a high frequency intermittent current to flow through the primary winding n1 of the transformer T1, and causes the secondary winding n2 . A high voltage alternating current necessary for a calling signal is induced in n3.

The alternating current is rectified and smoothed by a generating circuit 7.8, and two sets of direct current having opposite polarities are generated.

The semiconductor elements 2 and 3 inserted in series with each output of the generating circuit 7.8 are controlled alternately every half period by the sine wave output signal of the basic oscillator 4, and the current is made into a half sine wave by this control. The outputs of the generating circuits 7 and 8 are superimposed so that they have opposite polarities.

In this way, an AC power source for the calling signal is obtained, but since the voltage is converted using high frequency, the transformer becomes smaller.
Since the other components are comprised of semiconductors and capacitors, it is possible to create a highly reliable, compact, lightweight device that can be mounted in any location.

〔Example〕

The present invention will be specifically explained below with reference to illustrated examples.

FIG. 2 is a circuit diagram of the calling signal power supply device of the present invention. The same reference numerals indicate the same objects throughout the figures.

In FIG. 2, the interrupter l in FIG. 1 corresponds to the pulse oscillator 5 and the transistor Q1, and the semiconductor elements 2.3 correspond to the photocoupler P1. Corresponds to P2.

The pulse oscillator 5 turns on and off the transistor Q1 at a high frequency, for example 100 K11z, and causes the current from the battery B1 to flow intermittently to the primary winding n1 of the transformer T1.

The current in the primary hoof wire n1 causes the secondary winding n2. The high voltage and high frequency wave induced in n3 is transmitted through diode 01.02 and capacitor C1°C of generation circuit 7.8.
2 to generate two sets of equal DC voltages with opposite polarities.

P; The output of the 2M generation circuit 7.8 is the photocoupler P1
゜Although it is issued via P2, the photocoupler PI, P2
is controlled every half period by a sine wave output signal of the basic oscillator 4 which oscillates at a ringing signal frequency, for example 20 Hz, and generates a sine half wave current.

Then, by superimposing the half-sine current so as to have opposite polarity, it becomes alternating current and forms a calling signal.

〔Effect of the invention〕

As explained in detail above, according to the present invention, a direct current is created using a high frequency, and an alternating current of the calling signal is created using an oscillator with a frequency equal to that of the calling signal and a semiconductor element, so that the device is small, lightweight, and highly reliable. It is effective, and since it can be printed and printed temporarily, it can be mounted in any position.

[Brief explanation of drawings]

FIG. 1 is a principle diagram of a calling signal power supply device of the present invention, FIG. 2 is a circuit diagram of a calling signal power supply device of the present invention, and FIG. 3 is a circuit diagram of a conventional calling signal power supply device. In the figure, 1 is an interrupter, 2.3 is a semiconductor element, 4 is a basic oscillator, 5 is a pulse oscillator, 7.8 is a generation circuit, Bl is a battery, TI is a transformer, nl, n2. n3 is a winding, 01.02 is a diode, CI and C2 are capacitors, and PL and P2 are photocouplers.

Claims (2)

[Claims] (1) Intermittent section that creates high-frequency current through intermittent operation (
1), the current is added to the primary winding (n1) of the transformer (T1), and the alternating current generated in the two secondary windings (n2, n3) is rectified.
Two sets of generating circuits (7, 8) that smooth and generate direct current with opposite polarities are provided, and semiconductor elements (2, 3) are inserted into each of the outputs of the two sets of generating circuits (7, 8). The element resistance of the semiconductor element (2, 3) is controlled alternately every half cycle by a sine wave signal of the basic oscillator (4) having a ringing signal frequency, and the element resistance of the semiconductor element (2, 3) is controlled alternately every half period. A calling signal power supply device characterized in that outputs are superimposed so as to have opposite polarities. (2) The calling signal power supply device according to claim 1, wherein the semiconductor elements (2, 3) are photocouplers.