cacr-03-TE3BUD 手冊說明書參詳_廈門海通華業科技有限公司

cacr-03-TE3BUD 手冊說明書參詳

變換器

DC/DC變換器將一個固定的直流電壓變換為可變的直流電壓,這種技術被廣泛應用於無軌電車、地鐵列車、電動車的無級變速和控制,同時使上述控制獲得加速平穩、快速響應的性能,並同時收到節約電能的效果。用直流斬波器代替變阻器可節約電能(20~30)%。直流斬波器不僅能起調壓的作用(開關電源), 同時還能起到有效地抑制電網側諧波電流噪聲的作用。

通信電源的二次電源DC/DC變換器已商品化,模塊採用高頻PWM技術,開關頻率在500kHz左右,功率密度為5W~20W/in3。隨著大規模集成電路的發展,要求電源模塊實現小型化,因此就要不斷提高開關頻率和採用新的電路拓撲結構,當前已有一些公司研制生產了採用零電流開關和零電壓開關技術的二次電源模塊,功率密度有較大幅度的提高。

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