JPS6328533B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a phase pulse signal generating circuit that generates a phase pulse signal on a commercial frequency voltage waveform of an AC distribution line or an AC voltage waveform of a dedicated line.

A conventional phase pulse signal generating circuit, as shown in the basic circuit of FIG. configured,
When the electronic switch 4 is turned on, the capacitor 3 is rapidly charged, and the AC distribution lines 1 and 1' are momentarily short-circuited, causing vibrations due to the inductance 2, the capacitor 3, and the constants of the distribution lines 1 and 1'. occurs, and a phase pulse signal is transmitted.

The waveform of the above phase pulse signal changes greatly depending on the timing at which the electronic switch 4 is turned off.
As shown in FIG. 2A, if the time from time T ₁ when electronic switch 4 is turned on to time T ₂ when it is turned off is increased, inductance 2 and capacitor 3 are connected to distribution line 1 through electronic switch 4. ,1′
The time it takes to be connected to the inductance 2 increases.
Then, the capacitor 3 and the circuit network of the distribution lines 1, 1' enter into a resonant state, and subsequent vibrations 7, 8 having the same frequency as the phase pulse signal 6 are generated on the alternating voltage wave 5. Also, if the time from the time T ₁ when the electronic switch is turned on to the time T ₂ when it is turned off is made small so that the inductance 2 and the capacitor 3 are disconnected from the distribution lines 1 and 1' in a short time, , the vibration system changes significantly at time T ₂ and the distortion 9 shown in FIG. 2B occurs between the phase pulse signal 6 and the subsequent vibrations 7, 8.

These distortions 9 or subsequent vibrations 7, 8 are unnecessary for the phase pulse signal 6, and a large number of channels are set within one cycle of the carrier AC voltage wave, and each channel is In order to transmit the phase pulse signal, there is a problem in that it becomes susceptible to effects when the transmission interval of the phase pulse signal is shortened and becomes harmful.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and provide a phase pulse signal generating circuit that is free from distortion and has less subsequent vibration.

To achieve this objective, the present invention comprises an electronic switch that turns off within one period after the first half-wave of the phase pulse signal, and between the lines to which an alternating voltage is applied. A subsequent vibration control circuit consisting of a resistor or a resistor and a capacitor is connected to prevent the occurrence of distortion depending on the timing of turning off the electronic switch, and the subsequent vibration control circuit reduces subsequent vibration. It is characterized by

Hereinafter, the present invention will be explained in detail based on illustrated embodiments.

FIG. 3 is a phase pulse signal generation circuit diagram showing one embodiment of the present invention.

An inductance 10 is connected in series between the distribution lines 1 and 1' to which an alternating current voltage is applied.
A phase pulse signal injection circuit 14 comprising a capacitor 11, a directional electronic switch 12 such as a transistor or a thyristor, and a diode 13 connected in antiparallel to the electronic switch 12;
A subsequent vibration control circuit 18 consisting of an inductance 15, a capacitor 16, and a resistor 17 connected in series is connected in parallel. The phase pulse signal injection circuit 14 and the subsequent vibration control circuit 18 form a phase pulse signal transmission circuit.

19 and 20 show the loads connected to the distribution lines 1 and 1' using equivalent circuits.
0 are formed by inductances 21, 22, capacitors 23, 24, and resistors 25, 26, respectively.

FIG. 4 shows a phase pulse signal generated by turning on the electronic switch 12. In FIG.

Below, FIGS. 3 and 4 will be explained.

At time T ₁ when the phase pulse signal 28 is transmitted on the AC voltage wave 27, the electronic switch 12 is turned on by the trigger signal, and the inductance 10
The capacitor 11 is rapidly charged through the AC voltage wave 27, and the AC distribution lines 1 and 1' are momentarily short-circuited, and a dip portion 29 of the phase pulse signal 28 is generated on the AC voltage wave 27. When the capacitor 11 is charged and the polarity is reversed at time _T2 , the capacitor 11 is discharged by the diode 13,
An over portion 30 of the phase pulse signal 28 occurs. At the above time _T2 , electronic switch 1
2 remains on, the polarity of the phase pulse signal 28 smoothly reverses.

At time T ₃ , the electronic switch 12 is turned off, but a current in the direction opposite to that of the electronic switch 12 is flowing through the capacitor 11 due to the diode 13 , so that the phase pulse signal injection circuit 14 and The power distribution line 1' is kept connected until the discharge of the capacitor 11 is completed, thereby preventing distortion from occurring before time _T4 .

After time T ₄ , the phase pulse signal injection circuit 14
Since the distribution lines 1 and 1' are disconnected, the subsequent vibration 31 is rapidly attenuated, and the electronic switch 12 detects the end of one cycle of the phase pulse signal 28.
This is smaller than when it is turned off after T ₄ .

Further, when the phase pulse signal 28 is generated, the subsequent vibrations generated by the loads 19, 20 and the circuit network of the distribution lines 1, 1' are caused by the loads 19, 20 when the impedance of the loads 19, 20 is small. The vibration energy is consumed by the inductances 21, 22, capacitors 23, 24, resistors 25, 26, etc. of the load 1.
When the impedances 9 and 20 are large, large subsequent vibrations are given to the phase pulse signal 28. Such subsequent vibrations can be prevented from occurring because vibration energy is consumed by the subsequent vibration control circuit 18 formed by the inductance 15, capacitor 16, and resistor 17.

In the embodiment shown in FIG. 3, an inductance 15, a capacitor 16, and a resistor 17 are used in the subsequent vibration control circuit 18, but the inductance 15 may be replaced with an inductance connected to the distribution lines 1 and 1'. , it is also possible to use only the resistor 17 and omit the capacitor 16. Furthermore, the present invention can also be applied to a phase pulse signal generating circuit that transmits a phase pulse signal when a charged capacitor discharges.

As explained above, according to the present invention, the electronic switch is constituted by an electronic switch that turns off within one cycle after the first half wave of the phase pulse signal, and Since a subsequent vibration control circuit consisting of a resistor or a resistor and a capacitor is connected, distortion of the phase pulse signal can be prevented and subsequent vibrations can be reduced.

[Brief explanation of drawings]

Figure 1 is a circuit diagram showing a basic example of a conventional phase pulse signal transmission circuit, and Figure 2A is a time diagram showing the on/off of the electronic switch in Figure 1, the phase pulse signal generated thereby, and the subsequent vibration. Chart,
FIG. 2B is a time chart showing the phase pulse signal, distortion, and subsequent vibration generated by turning on and off the electronic switch shown in FIG. The circuit diagram shown in FIG. 4 is a time chart of the phase pulse signal generated by the illustrated embodiment of FIG. 1, 1'... Distribution line, 10... Inductance,
11... Capacitor, 12... Electronic switch, 1
3... Diode, 14... Phase pulse signal injection circuit, 15... Inductance, 16... Capacitor, 17... Resistor, 18... Subsequent vibration control circuit, 19, 20... Load, 27... AC voltage wave ,
28... Phase pulse signal, 31... Subsequent vibration.

Claims (1)

[Claims] 1. In a phase pulse signal transmitting circuit that transmits a phase pulse signal by turning on an electronic switch connected between the lines of a line to which an alternating current voltage is applied and in which diodes are connected in parallel, the electronic switch is , an electronic switch that turns off within one cycle after the first half wave of the phase pulse signal, and a subsequent vibration control circuit consisting of a resistor or a resistor and a capacitor is connected between the lines of the line. A phase pulse signal transmission circuit characterized by: