论文部分内容阅读
KJ785是一种性能优良的晶闸管移相触发器专用电路。它在正常工作时可输出两路相位差为180°的触发脉冲,移相范围宽(0～180°)。该器件主要用于各种变流设备中控制单向、双向晶闸管功率器件。 一、结构和原理 KJ785由同步检测寄存电路、基准电源电路、锯齿波形成电路、移相电压和锯齿波综合比较电路、逻辑运算控制以及功率放大电路等部分组成,如图1所示。由图1可以看出,该电路是运用同步锯齿波与移相电压相比较后产生移相触发脉冲的,所产生的移相触发脉冲经过逻辑电路处理并放大后输出。器件的
KJ785 is a special performance thyristor phase-shift trigger circuit. In normal operation, it can output two trigger pulses with phase difference of 180 ° and a wide range of phase shift (0 ~ 180 °). The device is mainly used in a variety of variable current devices to control one-way, two-way thyristor power devices. I. Structure and Principle KJ785 consists of synchronous detection register circuit, reference power supply circuit, sawtooth wave forming circuit, phase shift voltage and sawtooth comprehensive comparison circuit, logic operation control and power amplification circuit and other components, as shown in Figure 1. It can be seen from Figure 1, the circuit is the use of synchronous sawtooth wave phase shift voltage generated after the phase-shift trigger pulse generated by the phase-shift trigger pulse logic circuit and amplified after the output. Device