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An analysis is made on cause of the damage incident of quick fuses, controlled silicon and power control panels of the DC driving devices of Chuanwei High Speed Wire Plant due to overvoltage.

分析了因过电压造成川威高线直流传动装置快速熔断器、晶闸管及电源控制板损坏事故的原因,认为直流传动装置过电压保护措施必须完善,不能随意拆除。

Companies rely on some of Xi'an University of Electronic Science and Technology professor, research institutes of technology support, long-term cooperation in research and development power automation, electrical testing, electrical testing equipment, including: Switching mechanical properties tester, vacuum tester, cable fault tester, cable test Management systems, cables altimeter instrument, relay calibrator, DC high-voltage generator, or flow, test transformers, DC Resistance Tester, loop resistance tester, and change than the group tester, MOA tester, Transformer test aircraft, dielectric loss tester, ground resistance tester, such as electric Zhaoou table.

公司依托西安电子科技大学部分教授,科研院所的科技支持,长期合作研发电力自动化、电力测试、电气试验仪器设备,包括:开关机械特性测试仪、真空度测试仪、电缆故障测试仪、电缆测试管理系统、电缆测高仪、继电保护校验仪、直流高压发生器、升流器、试验变压器、直流电阻测试仪、回路电阻测试仪、变比组别测试仪、氧化锌避雷器测试仪、变压器试油机、介质损耗测试仪、接地电阻测试仪、电动兆欧表等。

As the motor of direct current had good characteristic of adjusting the speed, the numerical control lathe system adopted the servo motor of direct current in the past.

由于直流电动机具有良好的调速特性,以往数控机床系统均采用直流伺服电动机。

In this system, taking the single- chip computer89C51 as the core part and the small-type of DC motor as the control object.a double closed-loop PI control is implemented.

本文介绍了一种基于单片机控制的PWM直流电机调速系统,系统以89C51单片机为核心,以小型直流电机为控制对象,实现双闭环PI控制。

In this system, taking the single- chip computer89C51 as the core part and the small-type of DC motor as the control object.a double closed-loop PI control is implemented.

摘要本文介绍了一种基于单片机控制的PWM直流电机调速系统,系统以89C51单片机为核心,以小型直流电机为控制对象,实现双闭环PI控制。

Inthis system, taking the single- chip computer89C51 as the core partand the small-type of DC motor as the control object.a doubleclosed-loop PI control is implemented.

本文介绍了一种基于单片机控制的PWM直流电机调速系统,系统以89C51单片机为核心,以小型直流电机为控制对象,实现双闭环PI控制。

Brushless DC motor driver for the use of six-phase control procedures, can be used for six three-phase full-bridge driver circuit of brushless DC motor control.

详细说明:无刷直流电机驱动程序,采用六段换相控制程序,可用于六管三相全桥驱动电路的无刷直流电机控制。

This system to dc voltage source as the core, mainly AT89S52 SCM, through the keyboard controller to install dc power supply output voltage, setting stepping class can reach.01v output voltage, the range of 0-9.9 V, the maximum current 330mA for, and can show the actual pipe by digital output voltage value s.

摘 要:本系统以直流电压源为核心,AT89S52单片机为主控制器,通过键盘来设置直流电源的输出电压,设置步进等级可达0.1V,输出电压范围为0—9.9V,最大电流为330mA,并可由液晶屏显示实际输出电压值。系统有过流保护电路,当输出电流过大时功率管自动截至,而且有红色指示灯发出警报。

Abstract摘要:This system to dc voltage source as the core, mainly AT89S52 SCM, through the keyboard controller to install dc power supply output voltage, setting stepping class can reach.01v output voltage, the range of 0-9.9 V, the maximum current 330mA for, and can show the actual pipe by digital output voltage values.

论文摘要摘要:本系统以直流电压源为核心,AT89S52单片机为主控制器,通过键盘来设置直流电源的输出电压,设置步进等级可达0.1V,输出电压范围为0—9.9V,最大电流为330mA,并可由液晶屏显示实际输出电压值。系统有过流保护电路,当输出电流过大时功率管自动截至,而且有红色指示灯发出警报。

This system to dc voltage source as the core, mainly AT89S52 SCM, through the keyboard controller to install dc power supply output voltage, setting stepping class can reach.01v output voltage, the range of 0-9.9 V, the maximum current 330mA for, and can show the actual pipe by digital output voltage values.

论文摘要:本系统以直流电压源为核心,AT89S52单片机为主控制器,通过键盘来设置直流电源的输出电压,设置步进等级可达0.1V,输出电压范围为0—9.9V,最大电流为330mA,并可由液晶屏显示实际输出电压值。系统有过流保护电路,当输出电流过大时功率管自动截至,而且有红色指示灯发出警报。

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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。

Its advantage is that it can be used in smaller units.

其优点在于可以在较小的单位中应用。