Theory of Operation

        Series Motor

        DC series motor

        Armature reaction

        Reactance voltage and commutation

        Torque speed characteristics

Theory of Magnets

        Properties of ferromagnetic materials

        Magnetic circuits

        Examples of magnetic circuit calculations

Motor Construction

        Bearings

                Ball bearings

                Sleeve bearings

        Shafts

                Materials

                Hardness

                Shafts and bearings

        Armature and stator cores

        Insulation systems

        Field assemblies

                Geometry

                Field turn length

                Field resistance

                Copper weight

                Turns ratio

        Armature assemblies

                Geometry

                Winding types

                Winding methods

            Armature turn length

                Armature resistance

                Copper weight

                Balance

Magnetic Circuits

        Magnetic paths

                Armature lengths

                Armature areas

                Field lengths

                Field areas

                Magnetic circuits

                Air gap

        Carter coefficient

        Flux densities

        Trickey factor

        MMF drops

        Reactance

                Field

                Armature

                Main pole

                Slot

                End

                Inter polar

                Tooth tips

                Total reactance

Commutation

        Round

        Commutation to neutral zone ratio

Flat

        Commutation

        Reactance voltages

        Transformer voltages

        Short circuit voltages

        Commutation voltage

        Armature reaction and brush shift

        Linear, over and under commutation

        Brush pressure

        Brush dust

        EMI

        Performance Calculations

        Calculation procedure

        Performance calculation

        Flux vs. MMF plot

        Leakage factor

        Flux densities

        MMF drops

        Phasor diagram

        Power factor

        Transformer voltage

        Core loss

        Speed

        Torque

        Friction and windage

        Power in

        Power out

        Efficiency

        Sample problem