Lect23 - Lecture 23 EE743 Lecture 23 EE743 3-Phase Induction Machines Performance calculation Professor Ali Keyhani Professor Ali Keyhani 2

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Unformatted text preview: Lecture 23 - EE743 Lecture 23 - EE743 3-Phase Induction Machines Performance calculation Professor: Ali Keyhani Professor: Ali Keyhani 2 Equivalent circuit 3 Power calculations 1 2 1 3 1 R I P loss R stator = P c : core losses { } * 1 1 Re 3 I V P i = ( 29 s R I P R I P P c i AG ' 2 2 2 1 2 1 3 3 3 = +- = Power crossing the air gap ' 2 2 2 3 R I P P P P AG em d conv- = = = Electromagnetic power Developed power Rotor losses 4 Power calculations - =- = ' 2 ' 2 ' 2 ' 2 ' 2 ' 2 2 ' 2 3 3 3 R s R I R I s R I P em ( 29 ( 29 s P s s R I s s R I P P AG em conv- =- = - = = 1 1 3 1 3 ' 2 2 ' 2 ' 2 2 ' 2 r em P P P- = Rotational losses To load 1 R i g P P P- = ( 29 g em P s P- = 1 1 2 1 1 R I P R = ' 2 2 2 2 R I P R = P i P Rotational losses 5 Power calculations 6 Power calculations m T P ϖ = φ φ em em P P 3 3 = m em em T P ϖ φ = 3 ( 29 - = = s s R I P T m m em em 1 3 ' 2 2 1 3 ϖ ϖ φ sync m sync s ϖ ϖ ϖ- = ( 29...
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This note was uploaded on 07/17/2008 for the course ECE 743 taught by Professor Keyhani during the Spring '08 term at Ohio State.

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Lect23 - Lecture 23 EE743 Lecture 23 EE743 3-Phase Induction Machines Performance calculation Professor Ali Keyhani Professor Ali Keyhani 2

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