JPS5914783Y2 - Starting device in power supply instantaneous stop generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a starting device in a power instantaneous stop generator.

Conventionally, a measuring instrument such as a synchroscope has been used to momentarily stop the power supply and examine the characteristics of the power supply.

Measuring instruments such as this synchroscope are suitable for measuring repetitive waveforms, but are not suitable for measuring alternating current waveforms that stop momentarily. The drawback was that it required skill to investigate.

In view of the above, the present invention makes it possible to easily measure the waveform when the power supply is momentarily stopped just once, including the waveform immediately before and after that, with a measuring instrument such as a synchroscope, or to display it on a screen. With the goal.

Hereinafter, the present invention will be explained with reference to embodiments shown in the drawings.

1 is a zero point detection circuit that outputs a pulse 1a every time it detects the Xerox point of the AC power supply, 2 is an instantaneous power outage switch that is operated to instantaneously stop the power supply, and 3 starts one pulse when the instantaneous power outage switch is operated. A starting circuit outputs a signal 3a, and 4 is a trigger pulse 4 that starts the instantaneous stop measuring device 5.
This trigger pulse generating circuit 4 is composed of a flip-flop circuit 6 and an AND circuit 7, and the flip-flop outputs the starting signal 3.
a and outputs a set signal 6a, and the AND circuit 7 outputs a trigger pulse 4a when the AND condition of the set signal 6a and pulse [a] is established.

The set signal 6a is fed back to the starting circuit 3 and sets the starting circuit 3 to a non-operating state.

Reference numeral 8 denotes an instantaneous stop trigger pulse generation circuit consisting of a flip-flop circuit 11. The flip-flop circuit 9 is activated by the trigger pulse 4a and outputs a set signal 9a, and the AND circuit 11 generates a signal between the set signal 9a and the pulse 1a. When the AND condition is met, a trigger pulse 11a is output.

On the other hand, it is set by the flip-flop pulse 11a and outputs a set signal 10a.
A is returned to the AND circuit 11, and this gate is closed.

Flip-flop circuit 6, 9. 10 is a reset signal 12 a that is output when a certain period of time has passed after the measurement is completed.
It is reset by .

On the other hand, the trigger pulse 11a is used as an opening/closing signal for a thyristor or the like to instantaneously stop the power supply.

Next, the operation of the instantaneous power supply stop generator having such a configuration will be explained.

First, the measuring device 5 is connected to a measuring point, and the instantaneous power failure switch 2 is operated.

As a result, the trigger pulse generation circuit 4 for starting the measuring instrument is set by the pulse 1a first outputted from the zero point detection circuit 1 after the instantaneous power failure switch 2 is operated.

Next, when the second pulse 1a is output from the zero point detection circuit 1, a trigger pulse 4a is output from the measuring instrument starting trigger pulse generating circuit 4 to the measuring instrument 5, and at the same time is input to the instantaneous stop trigger pulse generating circuit 8. .

As a result, the measuring device 5 starts measurement, and the instantaneous stop trigger pulse generating circuit 8 sets the flip-flop circuit 9.

Subsequently, when the third pulse 1a is output from the zero point detection circuit 1, the trigger pulse 11a is output from the instantaneous stop trigger pulse generation circuit 8 to the instantaneous stop element (for example, the gate terminal of a thyrisk via an inverter), and the power supply is turned off. A momentary stop occurs.

Subsequently, even when the pulse 1a is output from the zero point detection circuit 1, the stationary state is maintained.

The waveform is automatically displayed on the measuring device immediately before the instantaneous stop occurs, and there is no need to adjust the measurement timing, and the waveform of this instantaneous stop, including the waveforms immediately before and after, can be displayed on the measuring device.

In the embodiment, it is not necessary to synchronize the starting circuit with the first pulse from the zero point detection circuit, and one shot pulse may be output when the instantaneous power failure switch is turned on.

In this case, the trigger pulse generation circuit for starting the measuring instrument is started by the first pulse from the zero point detection circuit, and the instantaneous stop trigger pulse generation circuit outputs a trigger pulse by the pulse output from the zero point detection circuit thereafter. .

As is clear from the above explanation, according to the present invention, a trigger pulse is automatically output to the measuring instrument immediately before the power supply is momentarily stopped, and the waveform is displayed on the measuring instrument from, for example, a half wavelength immediately before the power supply is stopped. This makes it possible to project this waveform and measure its characteristics without requiring any skill.

[Brief explanation of the drawing]

The drawing is a block circuit diagram of a starting device in an instant power supply stop generator according to the present invention. 1...Zero point detection circuit, 2...Momentary power failure switch, 3...
... Starting circuit, 4... Trigger pulse generation circuit for starting the measuring instrument, 8... Momentary stop trigger pulse generation circuit.

Claims (1)

[Scope of utility model registration request] A zero point detection circuit 1 that outputs a pulse every time it detects the zero cross point of a commercial AC power supply, an instantaneous power outage switch 2 that is operated to instantaneously stop the power supply, and a starting circuit that outputs a starting signal when this instantaneous power outage switch is operated. 3, a trigger pulse generation circuit 4 for starting the measuring instrument which outputs an l-IJ pulse for starting the instantaneous stop measuring instrument in response to the pulse output from the zero point detection circuit after this starting signal; The power supply is characterized by having an instantaneous stop trigger pulse generation circuit 8 which outputs a set signal at the same time and outputs a trigger pulse for starting an instantaneous stop of the power supply according to the set signal and the pulse output from the zero point detection circuit. Starting device in an instantaneous stop generator.