842E-CM-MIP2BA

842E-CM-MIP2BA 842E-CM-MIP2BA

现货供应  价格优势

陕西欣鸿然自动化设备有限公司

联系人:宁超 热线：029-83338136

手机：15339052544 Q Q:1293858601

邮箱:1293858601@qq.com 传真:029-83561013

主营产品：AB全线产品，西门子全线产品，ABB定位器

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固态开关，也称为无触点开关，一般由电力电子技术实现，

其国际标准命名为：半导体交流电力控制器(Semiconductor AC Power Controller)， 无触点开关与机械式有触点开关比较有以下优点：(1)寿命长，机械式分断时起弧、触头磨损，固态开关没有磨损。(2)工作频率高，机械式为4~10工频周波，固态开关<10ms。(3)可靠性高。(4)使用安全。(5)电磁干扰小。其比较如右图所示。

固态开关的缺点有： (1)发热;需冷却器或短路开关。(2)抑制瞬变;需吸收网络，不全断开。(3)无明显断点。

(1)半控型固态开关：对于关断时间要求不甚高的场合(10ms以上)，同时需要考虑经济性时，可选用半控型固态开关。

(2)全控型固态开关：重要负荷，容量大，而且对电能质量的要求越来越高场合,需要研究具有更优越性能的全控型固态开关技术，以满足用户的要求。

(1)移相控制：控制晶闸管在正、负半波中对称触发控制。以导通角θ的大小来调节输出电压大小。 还可以根据反馈量的类别分为电压控制、电流控制、功率控制或其它物理量的控制。

(2)过零控制：以一个设定的时间为周期，以过零触发方式控制晶闸管在设定周期中的导通周波数。从而确定输出功率的大小。在带有变压器负载时，不能随机半波控制，即使全波控制过零触发也要保证始终正向(或负向)关断--防止单向磁偏。还会带来间谐波。

(3)开关控制：通过晶闸管对交流负载进行通断控制，具体还可以分为：任意接通模式--开通延时很小，为微秒级;过零接通模式--开通延时比较大10ms，关断延时比较大也可达10ms。交流电子开关的控制输入信号仍为开关量(1或0)。

固态开关的应用编辑(1)软启动、软关断直流固态开关;

(2)具有短路限流保护的固态开关;

(3)负载自动切换开关(LTM);

(4)固态开关在单相电机起动中的应用。

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Pei servant shoot people call the shaws of words.

Zhang hua ChuTao, language Liu Pingyuan yue: "your brothers Long Yueyun tianjin, Gu Yanxian fengming chaoyang. Refers to treasure is southeast, no surprise after see ChuSheng."Lu yue: "and not see not singing jump one ear!"

Have asked scholar: "the old name is wu?"Answer yue: "SAN Wu Fu king king of age, at the time of Ming tuan Yi. Zhu Yongchang principle of content to DE, high cleaning. YanZhongBi nine gao of the whooping crane, the hollow of the white pony. Gu Yanxian eight harps, five-color Long Zhang. Zhang Wei cold" age of alum, the escape of night light. Liu Shiheng, back to the pei Long Honggu, hanging drum to the hammer. All in you: for hong pen 鉏 Lei, fertile fields for paper Zagreb. < ineffable silence > as farm, aiming for good harvest. To talk about for acs, with loyal and treasure. The articles in the splendid, accumulate the torah as Zeng silks. Sit XiJian is humility, Zhang Yi for curtain. Do what as the room space, repair morality as the house."

People ask Wang Yi just: "mountain juyuan giri? Who's generation?"Wang yue: "at the beginning of the person not to talk about themselves, but don't read old, zhuang, smell its wing, often to its purport."