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无论是哪一种变频器，都大量使用了晶闸管等非线性电力电子元件，不管采用哪种整流方式，变频器从电网中吸取能量的方式都不是连续的正弦波，而是从脉动的断续方式向电网索取电流，这种脉动电流和电网的沿路阻抗共同形成脉动电压降叠加在电网的电压上，使电压发生畸变，经傅立叶原理分析可知，这种非同期正弦波电流是由于频率相同的基波和频率大于基波频率的谐波组成。
Agilestar - ONS-SE-GE-BXU-AS - For Cisco - New in Box
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Agilestar - 10060 - For Extreme Networks - New in Box
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Agilestar - 700013147 - For use in Avaya - New in Box
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Agilestar - 15500-XVRA-03B2-AS - For Cisco - New in Box
Agilestar - AT-SPZX80/1470 - For Allied Telesis -NIB
Agilestar - AT-SPZX80/1490 - For Allied Telesis - NIB
Agilestar - AT-SPZX80/1510 - For Allied Telesis - NIB
Agilestar - AT-SPZX80/1530 - For Allied Telesis - NIB