查询词典 thyristors

A phase advancer has a main AC-AC frequency conversion circuit consisting of thyristors.When sampling circuit detects the zero passage signal produced in rotor current of motor,main circuit controlled with advanced microcomputer controlling technique will change the AC voltage of 380V,50HZ into compensating voltage with the same frequency as that of rotor voltage and rotor current 90°in phase lay to achieve the goal to raise the power factor of the motor.

由可控硅构成的交变频主电路，在采样电路检测到电机转子电流产生的过零信号后，经过先进的微机控制技术控制主电路，将380V、50HZ交流电压转换成转子频率相同，相位滞后转子电流90°的补偿电压，达到提高电动机功率因数的目的。

A design of armature coils system with the fewer thyristors, and the simple way of building high power system is also introduced.

并给出了具有最少可控硅器件数量的电枢绕组系统设计，以及构建大功率系统的简单扩容方法。

The reason is that soonest at the next current zero-crossing the firing pulse of thyristors can be reset.

通常的短路故障电流会大大高于这个倍数，而软启动器的晶闸管本身是没有短路分断能力的。

The zero detect signalresets the 280 which immediately gets the delay signalfrom the DAS via an A/D converter. The 280 then waitsfor this delay and outputs a pulse to the firing pulse amplifierwhich fires the thyristors of the full-wave rectifier

这个零探测信号把Z80复位，它立即通过模拟数字转换器而从DAS得到延迟信号。Z80然后等待这个延迟并且发出一个脉冲来激活放大器，再激活全波调制晶闸管

By means of forced synchronization of current in thyristor branch with the line current, the mode switching from capacitive mode to Bypass can be implemented. In the switching strategy from capacitive mode to inductive veriner mode, a method of thyristor conditional firing is put forward. The thyristors will be fired and conducted on condition that both line current and capacitor voltage are inphase.

通过强制晶闸管支路电流与线路电流同步，实现由容性区到Bypass模式的切换；在由容性区到感性微调模式切换的过程中提出了晶闸管条件触发的方法，即当线路电流和电容电压满足同向条件时晶闸管才触发导通。

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。

Artificial Neural Network method was used to improve the solution of power electronic devices during application design, and to analyze the nonlinear relationship between the periphery circuit parameters and the switching characteristics of large capacity GTOs (Gate Turn-off thyristors), including power losses, turn-on and turn-off times, and the rise rate of device voltages and currents. ANN training error was ±5%approximately.

为便于器件的设计选型，根据已有实验数据，采用人工神经网络建立了外围环境参数和大功率门极自关断晶闸管开关特性（包括损耗特性、开通和关断时间、电压和电流的变化率等）之间的非线性关系，训练误差范围为±5%。

The reluctivity of reactor is controlled by accessional DC current which is got by commutating the net voltage through thyristors. In this system, we control the size of accensional DC current through changing the bust-angle of thyristor.

首先，详细分析了磁控电抗器的电路结构和基本工作原理，阐诉了铁磁材料的磁化特性、磁控电抗器铁芯的动态磁化曲线特性的基础上，给出了磁控电抗器的通用数学模型，并对磁控电抗器各工作状态之间的转换进行了详细地分析。

In this thesis, soft starter equipment realized by thyristors power transform circuit is studied. To improve equipment performance, we apply variable reactance technique to AC motor soft starter study. The high voltage AC working winding of reactance is in series with motor winding, while low voltage control winding and thyristors groupware with intelligent controller constitute close loop circuit. We adopt thyristor phase control voltage-regulator mode to control low voltage winding, then control the reactance of high voltage winding, and then arrive at the goal-control the current and voltage of motor AC to realize motor soft starting.

本文研究由晶闸管功率变换电路实现的软起动器装置，为了提高装置的性能，将可变电抗技术应用于交流电机软起动研究中，电抗器的高压交流工作绕组与电动机绕组串接，低压控制绕组与带智能控制器的晶闸管组件组成闭合回路，采用晶闸管相控方式控制低压绕组，从而控制高压绕组的阻抗，以达到对电机电流与电压的控制，最终实现电机软起动的目的。

This paper presents a new structure of thyristors with a thin emitting region based on the pin diode model for thyristors.

在晶闸管的pin二极管模型基础上，提出了薄发射区晶闸管新结构。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。