BlogHide Resteemscountryroad (25)in food • 7 years ago火锅里煮出的温暖绿蚁新醅酒， 红泥小火炉。 晚来天欲雪， 能饮一杯无？ ----------------白居易 《问刘十九》countryroad (25)in cn • 7 years agoChina wants to be a polar powerWHEN the occupants of “Snowpanda House” in Ahtari zoo, Finland, were first allowed to play in the open air in mid-February, they bounded out and rolled in the white stuff. Xi Jinping, China’s…countryroad (25)in cn • 7 years ago经典！变频器内部主电路详解经典！变频器内部主电路详解~ 一、内部主电路结构 采用“交-直-交”结构的低压变频器，其内部主电路由整流和逆变两大部分组成，如图1所示。从R、S、T端输入的三相交流电，经三相整流桥（由二极管D1～D6构成）整流成直流电，电压为UD。电容器C1和C2是滤波电容器。6个IGBT管（绝缘栅双极性晶体管）V1～V6构成三相逆变桥，把直流电逆变成频率和电压任意可调的三相交流电。 图1…
