JPS587925A - Gate signal display circuit for thyristor - Google Patents

Abstract

PURPOSE:To visually confirm gate pulses directly applied to each thyristor by the naked eyes of an operator to check them by connecting light emitting diodes to the secondary windings of pulse transformers corresponding to respective thyristors which are connected in series or in parallel. CONSTITUTION:A gate pulse signal generated by a gate pulse generating circuit 1 is supplied to the primary winding of each gate pulse transformer 6 and inputted to each thyristor 3 through the secondary winding, turning on each thyristor. A light emitting diode 5 connected to the secondary winding of each gate pulse transformer 6 lights up at the input of the gate pulse signal, so that the existence of a gate pulse signal corresponding to each thyristor can be checked by the naked eyes of an operator.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gate signal display circuit for a thyristor that allows the presence or absence of a gate signal supplied to a thyristor to be visually checked.A conventional circuit of this type is shown in FIG. was there.

In the figure, (1) is a gate pulse generation circuit, (2) is a gate pulse generation circuit (1) provided corresponding to each thyristor (8) connected in series, and a valley thyristor (8) and the gate pulse generation circuit (1). ) is a gate pulse transformer that completely insulates the gate pulse signals supplied from the gate pulse generating circuit (1) to each thyristor (8). (4) is connected to the output terminal of the gate pulse generation circuit (1), and lights up when the output is sent out from the gate pulse generation circuit (1). This is a gate pulse display circuit that allows you to visually see whether the arc signal is being applied or not.

In the configuration shown in FIG. 1 above, the gate pulse generation circuit (1)
The gate pulse signal generated by the gate pulse transformer (2) is inputted to the silicon risk (8) by valving the insulated secondary winding that supplies the primary winding of each gate pulse transformer (2). Thyristor (8) is fully ignited. At this time, the gate pulse display circuit (4) is connected to the gate pulse generation circuit (
1) Lights up by a gate pulse signal generated from
It is now possible to fully visually confirm that the ignition signal is not being given to the Cylisk (8).

However, since the conventional gate pulse display circuit is configured as described above, it is possible to visually see the entire output of the gate pulse generation circuit (1), and the gate pulse display circuit actually supplied to each of the gate pulses (8) can be viewed visually. It is not possible to visually see all of the pulse signals. Therefore, if a large number of thyrisks (3) are connected to the gate pulse generation circuit (1), the gate pulse signal will be applied to each thyrisk (8) at an output of 1.
It was not possible to reliably visually confirm whether or not the stones were broken.0 The present invention was developed in order to eliminate all the drawbacks of the conventional ones as described above, and the secondary winding of each gate pulse transformer For the entire purpose of providing Thyrisk's gate pulse display circuit, the presence or absence of the gate signal to each thyristor can be visually confirmed with complete certainty by connecting a light emitting diode to the line, i.e. in parallel to the gate of each thyristor. There is.

Hereinafter, an embodiment of the present invention will be described with reference to FIG. 2, in which all the same parts as in FIG. 1 are denoted by the same reference numerals.

In FIG. 2, the gate pulse transformer (6) of the present invention is provided 2" corresponding to the valley thyristor (1).
The secondary winding (IC) is provided with a light emitting diode (5) that is in parallel with the gate of the valley sirisk, and each gate pulse transformer (
When a gate pulse signal is emitted to each sirisk (1) via the gate 0), the presence or absence of the gate pulse signal can be visually confirmed by the valley light emitting diode (5) vr-.

That is, in the configuration of FIG. 2, the gate pulse generation circuit (1
) is supplied to the primary winding of each gate pulse transformer (2) by an insulated transformer fC.
Secondary winding? Input 4 to the valley thyristor (8) through
At this time, the light emitting diode (5) connected to the secondary winding of the gate pulse transformer (6) receives the gate pulse signal from the input power 11. When it is caught, it is 1%-+)-4 by visual inspection!
J -xz(t-)KN"5 L fc 'J = )
′: The presence or absence of iv and x @ g can be confirmed.

As described above, according to the present invention, by providing the secondary winding of the pulse transformer corresponding to the valley current, the gate pulse γL is directly applied to each iris. This has the effect of allowing reliable visual confirmation.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing a conventional thyristor gate signal display circuit, and FIG. 2 is a circuit diagram showing a thyristor gate signal display circuit according to an embodiment of the present invention. (1)...φ gate pulse generation circuit (,-4), (6)-...gate pulse transformer (
8)・Conflict・Sirisk (5)Conflict・@U6 Photodiode In the figures, the same reference numerals indicate the same or corresponding parts. Agent Makoto Kuzuno - 5- 1 Figure 2 Hand A 1 Da C Amendment (Spontaneous) Showa 5717 011241.1 2. Invention 81'Th, Thyristor gate signal display 1 way 31 way I Niwo 4-ruh Name Ya ((iol):, Ryodenki Co., Ltd. representative + I + Jin 8 part, Column for detailed explanation of the invention in the specification subject to amendment 5 by agent. 6 Description of contents of amendment The description "each 1 - each thyristor (1)" in the 5th, 13th, and 17th lines of page 4 is corrected to "each thyristor (3)." Enoue 2-

Claims (1)

[Claims] The above-mentioned gate pulse supply circuit includes a gate pulse transformer which is provided correspondingly to each thyristor connected in series or parallel and supplies a gate signal from the gate pulse generation circuit to each of the above-mentioned thyristors. The thyristor's gate signal display circuit, which displays the presence or absence of a gate signal, is characterized in that all light emitting diodes are connected to the secondary SM side of each gate pulse transformer in parallel with the gate of each thyristor. Gate signal display circuit.