Retardation Test or Running down Test on DC Machines
Retardation or Running down Test On dc Machines: This is the best and simplest method to find the efficiency …
Regenerative or Hopkinson’s test on d.c machines
Regenerative or Hopkinson’s test on d.c machines: Regenerative or Hopkinson’s test on dc machines is useful to determine the efficiency …
Brake test on D.C Machines
Efficiency By Direct Loading Method: In this direct loading method, the d.c. machine is loaded and output and input are measured …
Open Circuit & Short Circuit Tests on Transformers
Open Circuit & Short Circuit Tests on Transformers: The circuit constants, efficiency and voltage regulation of a transformer can be determined …
Speed Control Methods of D.C. Series & Shunt Motors
Speed Control of D.C Motors: The speed of a d.c. motor is given by: …
Parallel Operation of D.C. Generators
Parallel Operation of D.C. Generators: Here this explains you the parallel operation of dc generators and load sharing among them …
Three point starters and Four point starters
Three Point Starters: Three point starter is widely used for starting shunt and compound motors. Three point starter Schematic Diagram: …
Types of Losses in DC Machines
Types of Losses in D.C. Machines: The losses in d.c machines (generator or motor) may be divided into three classes …
Armature Reaction in DC Generator
Armature Reaction in DC Generator: In this post, we shall discuss the various aspects of armature reaction and commutation in a dc …