
17-16 Power Electronics and Motor Drives
stages in order to shape waveforms, store energy, remove harmonics, modify voltage, and current levels,
and achieve the required response under source or load variations. e integration of power stages to com-
plete two or more groups of specications may improve the power density gures as is the case in indirect
converters, but it does not mean a reduction of the power processing stages. e power conversion tech-
niques and power electronics elements presented so far are focused on increasing the eciency of each
energy transformation stage. Overall eciency also increases when 100% of the energy is n ...