EM203

EM203

整流部分為三相橋式不可控整流器，逆變部分為IGBT三相橋式逆變器，且輸出為PWM波形，中間直流環(huán)節(jié)為濾波、直流儲(chǔ)能和緩沖無(wú)功功率.

節(jié)能電機(jī)工作原理：   采用新型電機(jī)設(shè)計(jì)、新工藝及新材料，通過降低電磁能、熱能和機(jī)械能的損耗，提高輸出效率。

優(yōu)點(diǎn)： 1.直接啟動(dòng)，可更換異步電機(jī)；

2.稀土永磁節(jié)能電機(jī)本身可比普通電機(jī)節(jié)約電能3℅以上；

3.電機(jī)功率因數(shù)一般高于0.90，提高電網(wǎng)品質(zhì)因數(shù)，無(wú)需加功率因數(shù)補(bǔ)償器；

4.電機(jī)電流小，節(jié)約輸配電容量、延長(zhǎng)系統(tǒng)整體運(yùn)行壽命；

5.加驅(qū)動(dòng)器可實(shí)現(xiàn)軟起、軟停、無(wú)級(jí)調(diào)速，節(jié)電效果進(jìn)一步提高。

節(jié)能電機(jī)與變頻節(jié)能電機(jī)區(qū)別

1、節(jié)能電機(jī)是通過制造工藝提高電機(jī)本身的運(yùn)行效率

  2、變頻節(jié)能是指通過調(diào)節(jié)電機(jī)轉(zhuǎn)速來(lái)節(jié)約用電，能量轉(zhuǎn)換比不但沒有提高，反而降低了，因?yàn)樵黾恿俗冾l器的損耗。

  3、變頻調(diào)速主要用于負(fù)載變化的場(chǎng)合，節(jié)能效果非常明顯。其節(jié)能原理簡(jiǎn)單講就是根據(jù)需要，改變頻率，進(jìn)而改變輸出功率。

  4、對(duì)于負(fù)載穩(wěn)定的場(chǎng)合，也就是說(shuō)，不需要調(diào)速的場(chǎng)合，采用變頻器會(huì)降低整體效率，反而浪費(fèi)用電。

  5、負(fù)載變化大的場(chǎng)合，兩者都可省電，但是，變頻調(diào)速能夠節(jié)約電能的比例要大的多。節(jié)能電機(jī)與同功率普通電機(jī)相比，節(jié)能一般只能提高幾個(gè)百分點(diǎn)。

  6、變頻器供電的電機(jī)稱變頻電機(jī)，與普通電機(jī)有區(qū)別，變頻器直接驅(qū)動(dòng)普通電機(jī)，對(duì)電機(jī)有損害。

  7、兩者節(jié)能原理不同，兩者可同時(shí)使用，兩種技術(shù)都需要大力發(fā)展和推廣。

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