DC MACHINE

Construction of DC Machine

Lap and Wave Winding

Generation of AC Voltage

Generation of DC Voltage

Generation of uniform DC Voltage

EMF Equation

pathsparallelofNoA

conductorsArmatureofNoZ

rpminspeedN

polesofNoP

poleFluxwhere

VoltA

ZNPE

/

60

Types of DC Generator

Separately Excited Generator

Applications of DC Generator

Separately excited – Electroplating, electro refining

Shunt generator- Battery charging and ordinary lighting purpose

Series Generators-Booster on DC feeders, as a constant current

generator for welding generator and arc lamps

Cumulative compound generator- to transmit energy over a long

distance

Differential Compound Generators- Rarely used, electric arc welding

DC Generator and Motor

Prime Mover

Force experienced by current carrying conductor and coil

Types of DC Motor

Characteristics of DC shunt Motor

T vs IaN vs Ia

N vs T

DC Series motor characteristics

N vs T

DC Motor Starter

Three Point Starter

DC Shunt Motor –Speed Control

DC Shunt Motor –Speed Control

DC Series Motor-Speed Control

DC Series Motor-Speed Control