JPS59155879U

JPS59155879U - Gate control device for power conversion equipment

Info

Publication number: JPS59155879U
Application number: JP4863283U
Authority: JP
Inventors: 富司男中川
Original assignee: 株式会社明電舎
Priority date: 1983-03-31
Filing date: 1983-03-31
Publication date: 1984-10-19

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図はサイリスタ式励磁装置の要部を示す回路図、第
２図は従来のゲート制御装置の要部を示す回路図、第３
図は従来のゲート制御装置における交流電源の電圧波形
とゲートパルス信号との対応関係を示す特性図、第４図
は本考案のゲート制御装置をサイリスタ式励磁装置に組
み合わせた例　　　　、を示す回路図、第５゛図は第４
図に示したゲート制御回路を示す回路図である。１・・・ケートパルス発生モジュール、２Ａ〜２ｃ・・
・ゲートパルス発生回路、２０・・・ゲート制御回路、
３・・・周波数−電圧変換器、４．５・・・増幅器、５
０・・・定電流回路、６・・・トランジスタ。Figure 1 is a circuit diagram showing the main parts of a thyristor type excitation device, Figure 2 is a circuit diagram showing the main parts of a conventional gate control device, and Figure 3 is a circuit diagram showing the main parts of a conventional gate control device.
The figure is a characteristic diagram showing the correspondence between the voltage waveform of the AC power supply and the gate pulse signal in a conventional gate control device, and Figure 4 is a circuit diagram showing an example in which the gate control device of the present invention is combined with a thyristor excitation device. , Figure 5 is the fourth
FIG. 2 is a circuit diagram showing the gate control circuit shown in the figure. 1...Kate pulse generation module, 2A to 2c...
・Gate pulse generation circuit, 20... gate control circuit,
3... Frequency-voltage converter, 4.5... Amplifier, 5
0... Constant current circuit, 6... Transistor.

Claims

[Scope of utility model registration request]

The gate control circuit includes a bridge circuit including a thyristor, and a keyed control circuit for controlling firing of the thyristor of the bridge circuit, and the gate control circuit is configured to control the thyristor of the bridge circuit based on a synchronized pulse signal that detects the zero point of the AC power supply voltage. The gate control device has a time constant circuit including a discharging capacitor that discharges, and compares the voltage between the terminals of the discharging capacitor with a reference voltage and generates a gate pulse signal at the intersection of both voltages. The circuit includes a frequency-voltage converter that detects the frequency of the AC power supply voltage of the bridge circuit and obtains a DC voltage proportional to the detected frequency, and an ON-FF control for the output voltage of this frequency-voltage converter. and a circuit for adjusting a discharge time constant of the time constant circuit.