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引言H桥功率晶体管拓扑结构正日益成为从单电源电压来对电动机和其他负载进行双向驱动的一种常用方法。在大部分场合中,监视输送至负载的电流和实时地利用该信息以提供操作反馈至一个控制系统具有非常大的好处。在大多数新型设计中,人们往往采用脉宽调制(PWM)方法来提供高效的可变功率输送,但是,这样做会使负載的两端承受极快的电压瞬变,因而导致仪表问题的复杂化。
Introduction H-bridge power transistor topologies are increasingly becoming a common method of driving motors and other loads bidirectionally from a single supply voltage. In most instances, it is of great advantage to monitor the current delivered to the load and utilize this information in real time to provide operational feedback to a control system. In most new designs, pulse width modulation (PWM) methods are often used to provide efficient variable power delivery, but doing so can result in extremely fast voltage transients on both ends of the load, resulting in complex meter problems The