| 摘要 |
A DC chopper converter including four switching elements arranged in a four-arm or an H-bridge configuration between power supply terminals and on opposite sides of a load, each switching element having a free-wheeling diode connected parallel thereto, whereby at every load current direction, the two switching elements positioned diagonally opposite in the bridge are cyclically clocked such that the means value of the load current is defined by the overlap of the open times of the switching elements, while the two switching elements lying in series are clocked out of phase. Since all the switching elements are clocked, there is a steady transition during load current reversals such that the zero axis crossings of the load current need not be separately acquired for each reversal in the drive current.
|
