# lect6 - Lecture 6 EE743 Single-Phase Reluctance Machine...

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Lecture 6 - EE743 Lecture 6 - EE743 Single-Phase Reluctance Machine Professor: Ali Keyhani Professor: Ali Keyhani

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2 Single-Phase Reluctance Machine Consider a single-phase [1- φ ] reluctance machine shown below, as’ as . x T e ϖ r θ r as_axis
3 The equations that describe a single-phase reluctance machine are, Single-Phase Reluctance Machine as asas c r r as c r as e t r r r r B A ls asas as asas as as as s as i L W i W i T dt t L L L L i L dt d i r v 2 0 2 1 ) , ( ) , ( ) 0 ( ) ( 2 cos = = + = - + = = + = θ ϖ λ

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4 Note that when θ r =0, the reluctance is maximum along the magnetic as_axis . The torque expression - T T e - is valid for the transient and steady-state conditions. Single-Phase Reluctance Machine ( 29 2 sin ) , ( 2 cos 2 1 2 2 as as i L i T i L L L W r B r as e r B A ls c = - + =
5 Consider the case when i as =constant, Single-Phase Reluctance Machine Reluctance Te Reluctance Te θ θ r rotor position rotor position Maximum 0 0 Maximum 0 0 as’ as x . as_axis (magnetic axis)

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6 Single-Phase Reluctance Machine Reluctance Te Reluctance Te θ θ r rotor position rotor position k k as’ as x . as_axis (magnetic axis) max min < m 4 π θ = r
7 Single-Phase Reluctance Machine Reluctance Te Reluctance Te θ θ r rotor position rotor position 0 0 as’ as x . as_axis (magnetic axis) min 2 π θ = r

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8 Single-Phase Reluctance Machine Reluctance Te Reluctance Te θ θ r rotor position rotor position -k -k as’ as x . as_axis (magnetic axis) max min < m 4 3 π θ = r
9 Single-Phase Reluctance Machine Reluctance Te Reluctance Te θ θ r rotor position rotor position Maximum 0 Maximum 0 as’ as x . as_axis (magnetic axis) π θ = r

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10 Assume that there is no external torque on the shaft.
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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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lect6 - Lecture 6 EE743 Single-Phase Reluctance Machine...

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