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IE243 ELECTRICAL MACHINES–I [Cr. Hrs = 3+1] [Marks: 100+50]
By
Asif Ahmed Memon
THE LINEAR DC MACHINE (Review)
Four basic equations for linear dc machine
Starting the Linear dc machine
The Linear DC Machine as a Motor
The Linear DC Machine as a Generator
Starting Problems with the Linear Machine
Review
The Voltage Induced in a Rotating Loop (Review)
The Voltage Induced in a Rotating Loop (Review)
Getting DC Voltage out of the Rotating Loop
Getting DC Voltage out of the Rotating Loop
Getting DC Voltage out of the Rotating Loop
The Induced Torque in the Rotating Loop
The torque on the segment is give n by
The force on a segment of the loop is given by
The Induced Torque in the Rotating Loop
Segment abIn segment ab, the current from the battery is
directed out of the page. The magnetic field under the pole face is
pointing radially out of the rotor, so the force on the wire is given by
The torque on the rotor caused by this force is
The Induced Torque in the Rotating Loop
Segment bcIn segment bc, the current from the battery is flowing from the upper left to the lower right in the picture. The force induced on the wire isgiven by
The Induced Torque in the Rotating Loop
Segment cd. In segment cd, the current from the battery is directed into the page. The magnetic field under the pole face is pointing radially into the rotor, so the force on the wire is given by
The Induced Torque in the Rotating Loop
