A freewheeling clamp, which includes a freewheeling MOSFET and diode, is connected across the inductor.

A diode (11) which acts as a free-wheeling diode is connected in parallel with the current sensor (8).

Each freewheeling diode (9, 9') has a recovery time (T).

A freewheeling diode (15) is connected in parallel to the actuator (10).

Consequently, the energy loss can be markedly reduced as compared when the flywheel diode is used.

The five-phase inverter can consist of six pairs of a transistor and a freewheeling diode.

In particular, the correct polarity of an inductive actuator (361, 741) is detected using a flyback diode because the inductive actuator is bridged by the flyback diode (362, 742) in the event of an incorrect polarity.

Said safety coil (1) and said current sensor (2) are encircled by a recovery diode (4).

Each subcircuit (A, B) includes an inductor (L1, L2) and a freewheeling diode (D1, D2).

The inverter circuit (120) uses the parasitic diode (131) of SiC MOSFET (130) as a freewheeling diode to perform synchronous rectification.

The cathode of the recovery diode (5) is connected with the anode of the diode on one side and with the emitter or cathode of the semiconductor switch (6) on the other.

Provided is a power supply device which enables a reduction in the energy loss caused by the forward voltage of a flywheel diode.

The invention lies in the addition of a freewheel path (a freewheel diode 24) between the two dc voltage lines DC I and DC2, which provides a fifth state of operation when all the switches 10a to 10f are open.

A parallel arrangement of a freewheel diode (D) and a field effect transistor (T) is coupled in series with the second winding (N2).

A freewheeling MOSFET is connected in parallel with the inductor in a switched DC/DC converter.