Lecture 3
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This document discusses electrical machines and the linear DC machine. It covers four basic equations for the linear DC machine, how to start it as a motor and generator, and potential starting problems. It also reviews the voltage induced in a rotating loop and how to obtain DC voltage from it. The document examines the induced torque in a rotating loop by analyzing the force and torque on different segments of the loop as it rotates in a magnetic field.
![IE243 ELECTRICAL MACHINES–I
[Cr. Hrs = 3+1] [Marks: 100+50]
By
Asif Ahmed Memon](https://image.slidesharecdn.com/lecture3-150208111139-conversion-gate01/85/Lecture-3-1-320.jpg)
Lecture 3
- 1. IE243 ELECTRICAL MACHINES–I [Cr. Hrs = 3+1] [Marks: 100+50] By Asif Ahmed Memon
- 2. 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
- 3. Review
- 4. The Voltage Induced in a Rotating Loop (Review)
- 5. The Voltage Induced in a Rotating Loop (Review)
- 6. Getting DC Voltage out of the Rotating Loop
- 7. Getting DC Voltage out of the Rotating Loop
- 8. Getting DC Voltage out of the Rotating Loop
- 9. 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
- 10. The Induced Torque in the Rotating Loop Segment ab In 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
- 11. The Induced Torque in the Rotating Loop Segment bc In 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 is given by
- 12. 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
- 13. The Induced Torque in the Rotating Loop