Apparatus and associated systems and methods may relate to a process for
supplying unidirectional current to a load, controlling a reverse
electromotive force (REMF), capturing inductive energy from the load, and
supplying the captured inductive energy to the load. In an illustrative
example, an operating cycle may include a sequence of operations. First,
inductive energy captured from the load on a previous cycle may be
supplied to the load. Second, energy may be supplied to the load from an
external power source. Third, a REMF voltage may be substantially
controlled upon disconnecting the power source from the load. Fourth, the
load current may be brought to zero by capturing the inductive energy for
use on a subsequent cycle. In some embodiments, a single power stage may
supply a DC inductive load, or a pair of power stages may be operated to
supply bidirectional current to an AC load.