三菱FX2N PLC功能指令应用详解 108讲 -2017-06-21 21:15 李金城三菱PLC全套(全部高清) -2017-06-21 21:15 李金城三菱PLC技成培训入门视频 -2017-06-21 21:15 程子华全套FX视屏教程 -2017-06-21 21:15 实例大全.rar 62.7M2017-06-21 21:15 三菱停车场控制程序FX2N+视频.zip 18.9M2017-06-21 21:15 !三菱PLC FX系列PDF资料大全.rar 257.3M2017-06-21 21:15
上传时间: 2013-04-15
上传用户:eeworm
高压TSC(Thyristor Switch Capacitor)装置是指额定工作电压为6kV-35kV晶闸管投切电容器补偿装置,是一种典型静止无功补偿器,其对增强系统稳定性、提高系统运行经济性,保证电压质量及改善电能质量都能发挥良好的作用。目前国内对高压TSC装置研制与生产还处于起步阶段,加速高压TSC装置的国产化,对在我国电力系统中早日推广与应用高压TSC装置具有重大意义。 首先在无功功率的测量上,如何在有谐波干扰等复杂环境下准确检测无功功率,本文采用了基于快速傅立叶变换的方法,可以很好的完成无功功率的采集。在主电路结构上,晶闸管开关阀是高压TSC装置的关键构成部件,高压TSC装置要求晶闸管开关应具有良好的电气性能,要求晶闸管开关应是有效和可靠的。本文通过晶闸管特性和串联技术的研究,给出了晶闸管串联开关的静态均压和动态均压方法,设计出合理使用的电路结构。通过仿真分析,验证了均压电路的效果。 电容器无涌流投入技术也是TSC主要研究点,由于在高压系统中器件两端承受的电压较高,低压TSC系统中常用的过零固态继电器或集成过零触发芯片满足不了耐压的需要,本文设计了专门的过零检测及触发电路,在器件两端电压过零时触发,避免了由于电容器残压过高而造成的巨大冲击电流,从而在硬件电路上实现电容器组的无过渡过程投切,电路简单可靠。同时,在控制策略上将几种投切判据进行了比较,采用了电压无功复合投切判据,以无功功率作为主判据,电压作为辅助判据,有效地克服了仅以功率因数作为投切判据的控制方式中的轻载时容易产生投切振荡而重载时容易出现补偿不充分的缺点。
上传时间: 2013-05-24
上传用户:6546544
CR6221 combines a dedicated current mode PWM controller with a high voltage power MOSFET. It is opti
上传时间: 2013-04-24
上传用户:brucewan
CR6228 combines a dedicated current mode PWM controller with a high voltage power MOSFET. It is opti
上传时间: 2013-05-17
上传用户:natopsi
提供三菱FX全系列PLC的编程资料,是三菱PLC编程的必要手册。
上传时间: 2013-04-24
上传用户:chongcongying
P15V330 in video picel-rate switch applications
标签: P15V330
上传时间: 2013-04-24
上传用户:关外河山
The MAX4968/MAX4968A are 16-channel, high-linearity,high-voltage, bidirectional SPST analog switches with18I (typ) on-resistance. The devices are ideal for use inapplications requiring high-voltage switching controlledby a low-voltage control signal, such as ultrasound imagingand printers. The MAX4968A provides integrated40kI (typ) bleed resistors on each switch terminal todischarge capacitive loads. Using HVCMOS technology,these switches combine high-voltage bilateral MOSswitches and low-power CMOS logic to provide efficientcontrol of high-voltage analog signals.
上传时间: 2013-10-09
上传用户:yepeng139
With more and more multi-frequency clocks being used in today's chips, especially in the communications field, it is often necessary to switch the source of a clock line while the chip is running.
上传时间: 2013-10-10
上传用户:1214209695
Abstract: IC switches and multiplexers are proliferating, thanks to near-continual progress in lowering the supply voltage,incorporating fault-protected inputs, clamping the output voltage, and reducing the switch resistances. The latest of these advancesis the inclusion of precision resistors to allow two-point calibration of gain and offset in precision data-acquisition systems.
上传时间: 2013-11-12
上传用户:acwme
One of the most critical components in a step-up design like Figure 1 is the transformer. Transformers have parasitic components that can cause them to deviate from their ideal characteristics, and the parasitic capacitance associated with the secondary can cause large resonating current spikes on the leading edge of the switch current waveform.
上传时间: 2013-11-22
上传用户:15070202241