触发管

In the proposed device to remedy the defect that overhigh withstand voltage of thyristors used in converter are needed due to the overhigh DC link voltage, a method to control DC link voltage is put forward, that is, a special control logic for full-controllable switching elements is designed to make them equivalent to half-controllable switching elements which are naturally turned on and turned off by triggering, then connecting such a half-controllable switching element in series with DC link the defect of overhigh DC link voltage is effectively solved.

为了克服该装置直流母线电压过高，因而对逆变器开关管耐压要求过高的缺点，提出一种对直流母线电压进行控制的方法。对全控型开关器件设计一种特殊的控制逻辑，使其等效为一个自然导通、触发关断的半控型开关器件，将该半控型开关串联在直流母线上，有效解决了直流母线电压过高的问题。

It includes high power high voltage constant-current-charging system, capacitors bank, discharge control system, power supply of preignition for Xe-flashlamps, general control and diagnostic system. The power conditioning system drives flashlamps that pump the SSHCL. Flashlamps are driven by high voltage Silicon Controlled Rectifiers switched, resonant charged, discharge pulse forming network. The system uses microchip and digital circle which is based on CAN-bus for control and diagnostics. Energy diagnosis and thermal management are controlled by computers.

其中大功率高压恒流充电装置采用了L-C串联谐振电路，充电功率大，效率较高；储能装置采用了多节脉冲成形网络，可产生波形良好的强电流放电脉冲；放电控制装置采用高压大功率晶闸管，开关速度快，工作稳定；预燃与触发装置采用了开关电源电路，效率高、功耗小；总控与测量装置采用基于CAN总线的数字电路和单片机技术，控制冷却系统在激光器出光时对脉冲氙灯进行水冷，并对全系统进行控制和状态检测，同时具有过压、过流、过热等保护功能。

The reed switch is used as relay to spring the drug release movement remotely when the extracorporeal magnetic field of electrified coil has an effect.

以胶囊内的干簧管作为磁继电器，由体外通电线圈的磁场对药物释放动作进行遥控触发。

Uses the 89S51 monolithic integrated circuit to take the system the control core, the crystal thyratron zero has triggered the way realization alternating current supply the soft start, finally uses the multi-purpose board to build the overall system electric circuit.

采用89S51单片机作为系统的控制核心，晶闸管的过零触发方式实现交流电源的软启动，最终采用万用板来搭建整个系统电路。

The system by 8,098monolithic microcomputers, the temperature sensor, the A/D switch, thekeyboard and the display circuit, the crystal thyratron triggers theelectric circuit and so on the controller which is composed and iscontrolled the object resistance furnace to constitute a closed-loopcontrol system.

系统由8098单片机、温度传感器、A/D转换器、键盘及显示电路、晶闸管触发电路等组成的控制器和被控对象恒温库构成一个闭环控制系统。

The intelligence motor soft starters partial hardware electric circuit has designed mainly includes the electric current, the voltage examination module, the crystal thyratron triggers and the pulse width enlargement electric circuit module, the numeral keyboard entry and the liquid crystal display output module.

设计了智能型电机软起动器的部分硬件电路，主要包括有电流、电压检测模块、晶闸管的触发及脉宽放大电路模块、数字键盘输入及液晶显示输出模块。

A bipolar pulse gener AT or with A valanche Transistor is introduced which uses two paralleled tubes to enhance the amplitude of the output pulse. Meanwhile the power supply voltage can be adjusted, so better synchronous triggering can be performed.

介绍了一种双极性雪崩三极管脉冲产生器电路；电路采用双管并联以增大输出脉冲的幅度，并采用调节电源电压的方法来达到良好的同步触发。

That is to say, during the starting process of induction motor, hold-off angle of current has gradually decreased from initial value to zero. The method can always make the displacement angle less than thyristor's firing angle. So the voltage of the induction motor won't oscillate. Therefore, the oscillation of current, electromagnetic and speed can be eliminated during the soft-starting process of induction motor. This paper verifies the correctness of the method by simulation at first.

根据上述原因，本文提出了采用关断角控制的新型控制策略，这种控制策略是使电动机在起动过程中的电流关断角由某一初始值逐渐减小到零，利用该方法可以使感应电动机起动过程中的续流角始终小于晶闸管的触发角，这样续流角的变化就不会引起电动机端电压的振荡，因而就从根本上消除了感应电动机软起动过程中的振荡现象。

The positive converter makes the load current to be positive in trigging control, while the negative converter is negative.

系统建模在实际确定的导通模式基础上加上两管换流模式和正负换组模式；触发控制中正组变换器使负载输入电流为正，负组变换器使其为负。

In 'Phase angle' mode, the power transmitted to the load is controlled by firing the thyristors on a part of the supply

在移相触发模式中，负载的功率控制是靠晶闸管的提供的交流电压的部分电压完成的。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。