開(kāi)關(guān)電源基本原理與設(shè)計(jì)介紹 ppt
標(biāo)簽： 開(kāi)關(guān)電源
上傳時(shí)間： 2013-07-24
上傳用戶：eeworm
新型智慧驅(qū)動(dòng)器可簡(jiǎn)化開(kāi)關(guān)電源隔離拓樸結(jié)構(gòu)中同步整流器
標(biāo)簽： 驅(qū)動(dòng) 開(kāi)關(guān)電源 同步整流器
上傳時(shí)間： 2013-06-05
上傳用戶：eeworm
專輯類-開(kāi)關(guān)電源相關(guān)專輯-119冊(cè)-749M 開(kāi)關(guān)電源基本原理與設(shè)計(jì)介紹-62頁(yè)-2.3M-ppt.ppt
上傳時(shí)間： 2013-05-18
上傳用戶：lyy1234
(臺(tái)達(dá))開(kāi)關(guān)電源基本原理與設(shè)計(jì)介紹，比較實(shí)用
標(biāo)簽： 開(kāi)關(guān)電源
上傳時(shí)間： 2013-06-15
上傳用戶：ybysp008
R7732_7733_7735是Richpower公司推出的高效AC TO DC 電源PWM控制芯片,最大功率可以做到75W;如有需求請(qǐng)聯(lián)系我電話：021-54262182EXT 114 (Eric) QQ ：1187337351
標(biāo)簽： Control 7732 chip PWM
上傳時(shí)間： 2013-11-20
上傳用戶：xz85592677
~{JGR 8vQ IzWwR5SC5D2V?bD#DbO5M3~} ~{3v?b~} ~{Hk?b~} ~{2iQ/5H9&D\~} ~{?IRTWw@)3d~} ~{TZ~}JDK1.4.2~{OBM(9}~}
上傳時(shí)間： 2015-02-22
上傳用戶：ommshaggar
詳細(xì)介紹了開(kāi)關(guān)電源的設(shè)計(jì),再勵(lì)磁回路串接約為勵(lì)磁繞組電阻值10倍的附加電阻來(lái)構(gòu)成閉合電路，把同步電動(dòng)機(jī)的定子直接接入電網(wǎng)，使之按異步電動(dòng)機(jī)啟動(dòng)，當(dāng)轉(zhuǎn)速達(dá)到亞同步轉(zhuǎn)速（95%）時(shí)，再切除附加電阻。
標(biāo)簽： 勵(lì)磁 開(kāi)關(guān)電源 回路 繞組
上傳時(shí)間： 2014-01-14
上傳用戶：從此走出陰霾
b to b 模式 電子商務(wù)系統(tǒng) ，c# 開(kāi)發(fā) , B/S結(jié)構(gòu)
標(biāo)簽： to 模式 電子商務(wù)系統(tǒng)
上傳時(shí)間： 2014-01-20
上傳用戶：hanli8870
i7056控制開(kāi)關(guān)，可以透過(guò)電腦控制硬體開(kāi)關(guān)
上傳時(shí)間： 2013-12-28
上傳用戶：wsf950131
Servomotors are available as AC or DC motors. Early servomotors were generally DC motors because the only type of control for large currents was through SCRs for many years. As transistors became capable of controlling larger currents and switching the large currents at higher frequencies, the AC servomotor became used more often. Early servomotors were specifically designed for servo amplifiers. Today a class of motors is designed for applica-tions that may use a servo amplifier or a variable-frequency controller, which means that a motor may be used in a servo system in one application, and used in a variable-frequency drive in another application. Some companies also call any closed-loop system that does not use a stepper motor a servo system, so it is possible for a simple AC induction motor that is connected to a velocity controller to be called a servomotor.
標(biāo)簽： motors Servomotors servomotors available
上傳時(shí)間： 2014-08-10
上傳用戶：源碼3
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