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usb电平标准
多电平电压型变频器(下)
多电平电压型变频器(下)
在大功率领域,中点钳位三电平和H桥级联中压变频器应用最广泛,本文在详细讨论它们优缺点的基础上给出其主要适用场合,并分别介绍了它们各自的改进方案。文中还介绍了三种较少应用的多电平变换器:有源中点钳位三电平逆变器;电容钳位四电平变频器和在相支路中接入耦合电抗的多电平变换器。
USB协会标准
USB 2.0 Specification Engineering Change Notice (ECN) #1: Mini-B connector Date: 10/20/2000 Reason for ECN: The USB 2.0 specified device-side connector – the B connector – is too large for use with a new generation of handheld and mobile devices, e.g., cell phones which would benefit from connectivity to the PC. This ECN incorporates a specification of a device-side mini connector (hereafter r