Electric Propulsion Systems

CONTENTS 6.1 DC Motor Drives ......................................................................................142 6.1.1 Principle of Operation and Performance ..................................142 6.1.2 Combined Armature Voltage and Field Control......................146 6.1.3 Chopper Control of DC Motors..................................................146 6.1.4 Multiquadrant Control of Chopper-Fed DC Motor Drives ..........................................................................151 6.1.4.1 Two-Quadrant Control of Forward Motoring and Regenerative Braking ..........................................151 6.1.4.1.1 Single Chopper with a Reverse Switch ..........................................................151 6.1.4.1.2 Class C Two-Quadrant Chopper ............152