dc motors - 123seminarsonly.com
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DC Motors
IDIS - 300
Energy Transformation
Magnetic Field
CurrentMechanical Force(Rotation)
Interaction of Fields
Right Hand Rule
Value of Mechanical Force
Assuming that the conductor is located at right angles to the magnetic field, the force developed can be expressed as follows:
F = B I L
F = Force (Newtons)B = Magnetic Flux Density (Tesla)I = Current (Amps)L = Length in meters
Force Generated by Fields
Motor Operation
Basic Construction
Types of DC Motors
Types of DC Motors
Depending upon the connection of armature winding and field windings DC Motors are classified as:
Series DC MotorShunt DC MotorCompound DC Motor
Series DC Motor
Series Motor Limitations
No Load = Infinite Speed !
Shunt DC Motor
Counter EMF
CEMF proportional to rpm ???
Calculate CEMF
Horsepower Folklore
Horsepower and Torque
Horsepower delivered by Motor
Torque generated by Motor
Exercise:
Speed of DC Motor
Calculating the speed of CD-ROM
Counter EMF and Speed
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