ABSTRACT
The d.c. chopper is a d.c. to d.c. power electronic converter (PEC) with forced commutation. It is used for armature voltage control in d.c. brush motor drives. D.c. sources to supply d.c. choppers are batteries or diode rectifiers with output filters so typical for urban electric transportation systems or to low power d.c. brush motor drives. Thyristors, bipolar power transistors, MOSFETs or IGBTs are used in d.c. choppers.
