Unit 1, DC Generator, Unit 2 DC Motors, Unit 3 Losses and Efficiency and Unit 4 Testing of DC Machines
Unit 5 to 8 Synchronous Machines, Voltage Regulation and Synchronous Motor
Notes Credit – ELearning
Unit 1 Sample Notes
Refer PDF File for Complete Notes
CLASSIFICATION OF DC MACHINES
METHODS OF EXCITATION: depending on the type of excitation of field winding, there are two basic types of DC machine.
1. Separately excited machine: In this type of machines the field flux is produced by connecting the field winding to an external source.
2. Self excited machine: The field flux is produced by connecting the field winding with the armature in this type. A self excited machine requires residual magnetism for operation. Know More