直流

Introduces the application of PC programmable controller at uniflow high-speed elevator, and the principle of controlling uniflow high-speed elevator.

介绍PC可编程控器及其在高速电梯上的应,及高速电梯的控原理。

The magnets of BLDCM are felted with featheredge of the motor, and then are machining.

摘要无刷电动机的磁钢需要和薄壁磁轭粘接，并在粘接后还要机械加工。

The weatherproof, tamperproof cameras feature 540 lines of resolution, 0.5 lux sensitivity, and 12 VDC operation.

防雨，防篡改的相机有540线的分辨率， 0.5勒克司的灵敏度，和12伏电作业。

Abstract： In many power electronic applications ferrite cores of magnetic compon ents are biased with a DC or low-frequency premagnetization.

摘 要： 在电力电技术中应的铁氧体铁心磁性元件，其铁心中往往存在或低频交预磁化的情况。

A high temperature superconducting quantum interference device (SQUID) was fabricated for magnetocardiogram (MCG) measurement, and a single-channel dc SQUID magnetocardiograph was developed.

研于心磁测量的高量干涉器,并建立单通道高超导量干涉器心磁图仪。

The characteristic of variation of resistance for Polysilicon microresistor with time was measured under constant power operation using Digital Constant Power System(DCPS).

利数字式恒定功率测试系统（DCPS）对多晶硅微电阻进行恒定功率负荷下电阻随时间变化特性的测量实验。

For general exploringobjects requirement, narrow pulse signal with tens millimicro second to millimicrosecond has the frequency spectrum from DC to thousands MHz.

按照对地目标探测的一般需要,通常采纳秒到十纳秒量级的电磁探测窄脉冲,信号频谱具有从低频到千兆赫兹的宽带。

Model JO415 DC microammeter is suitable for students to measure weak current and slimelectric potenial in laboratory of middle school and polytechnic school.

JO415型安培计适于中学、中专等学校实验室，可测微弱电势。

Model C31 Meters are multirange instruments and a plug-in type switch is used for range change-over,so for the sake of easy operation.

C31型电表是磁电系张丝支承指针指示可携式电表,仪表具有良好的防颠震性能和较高的灵敏度及使寿命.

Kelvin bridge has the virtues of high sensitivity, precision reading and convenience to use.It is effective tools to measure the electrical resistivity and magnetoresistivity.

凯尔文双臂电桥具有灵敏度高、读数准确和使方便的优点，是测量材料电阻率和磁阻的有效工具。

The speed synthesizer based on SCM PIC16F876, which applied to the left and right drives of brush direct current motor for tracklayer robot and vehicle.

基于PIC16F876单片机的速度合成器,于履带式机器人或车辆的左、右有刷电机的驱动。

A new turbine-boiler coordination control system is designed for the 600 MW supercritical monotube boiler manufactured by Haerbin Boiler Plant with British Mitsm Babcock technology.

针对哈尔滨锅炉厂引进英国三井巴布科克技术造的600 MW超临界锅炉,设计新型的机炉协调控系统。

In this paper, a computer monitoring and control system for mine elevator and its hardwareand software designs are presented.The elevator is driven by a DC motor and controlled by an amplidyne.

本文介绍对交磁扩大机控的拖动矿井提升系统进行计算机监控的系统组成及硬、软件设计。

The too high impact direct current high pressure may reduce the resistance of trouble point too fast, even turn into a metalline earthing trouble, thus bring the trouble to appointed work.

过高的冲击高压可能会将故障点电阻降低太快，甚至变成金属性接地故障，从而给定点工作带来麻烦。

For one is beautiful is the brand, from direct current to gigacycle per second analogy, the composite signal, the radio frequency, the optical fiber, the micro controller and corresponds IC to have.

为一美系品牌，从到千兆赫的类比、混合信号、射频、光纤、微控器及通信IC均有。