首页>
外国专利>
Three phase inverter control circuit detecting two phase currents and deducting or adding identical ON periods
Three phase inverter control circuit detecting two phase currents and deducting or adding identical ON periods
展开▼
机译:三相逆变器控制电路,用于检测两相电流并扣除或增加相同的导通时间
展开▼
页面导航
摘要
著录项
相似文献
摘要
A small and highly vibration-proof inverter capable of detecting a phase current without requiring the development of complicated control software and without causing any current distortion is provided. Shunt resistors (15, 16) serving as a kind of current detector are provided, respectively, between lower arm switching elements X, Y, Z) in only two phases—and the minus side of a DC power supply. An identical ON period is reduced from the ON periods of upper arm switching elements (U, V, W) in the carrier cycle entirely for three phases. Consequently, phase current is detected for the two phases provided with the shunt resistors (15, 16). The inverter can detect the phase current without complicating the control software and without causing any current distortion, by controlling inverter circuit (10) with control software incorporated in control circuit (14) through connection lines (18).
展开▼