Professional classification of DC generators responsible for DC power supply in manufacturing industries. Includes factory DC power supply equipment, power sources for electroplating equipment, DC motor drive power sources, battery charging generators, and DC power sources for welding machines. Handles products categorized by excitation methods such as separately excited, shunt-wound, series-wound, and compound-wound types, as well as structural categories including brushed and brushless types. Clearly distinguished from AC generators, this classification specializes in generators that output direct current. Product selection is based on technical specifications such as rated output, rotation speed, and voltage specifications to meet DC power demands in manufacturing sites.