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Power Electronics and Motor Drives
book

Power Electronics and Motor Drives

by Bogdan M. Wilamowski, J. David Irwin
October 2018
Intermediate to advanced content levelIntermediate to advanced
1015 pages
40h 24m
English
CRC Press
Content preview from Power Electronics and Motor Drives
22-16 Power Electronics and Motor Drives
Trigonometric functions of the angle between two vectors may be calculated as follows:
cos( ) ,ϕ
α α β β
rs
r
r
r
s
r
r
r
s
r
i i i i
i
=
+
2
(22.55)
sin( ) ,ϕ
α β β α
rs
r
r
r
s
r
r
r
s
r
i i i i
i
=
2
(22.56)
where superscript r, s denote the current vector components determined respectively in the frame of
references connected to the rotor and the stator.
Components of the rotor current vector
i i
r
r
r
r
α β
,
can be measured directly, but
i i
r
s
r
s
α β
,
have to be estimated.
e main dependence of any induction machine is as follows (Figure 22.3):
i i i
m s r
= + ,
(22.57)
where i
m
, i
s
, i
r
are the magnetizing, stator and rotor current vectors. ...
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Publisher Resources

ISBN: 9781439802861