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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
Control of Converter-Fed Induction Motor Drives 21-21
However, in a very-low-speed operation, the eect of inverter nonlinearities (dead time, DC link voltage
pulsations, and power semiconductor’s voltage drop) has to be compensated.
21.6.2.3.2  Rotor Flux Vector Estimator
When the stator ux vector, Ψ
s
, is known, the rotor ux vector can be easily calculated as
Ψ Ψ σ
αr
r
m
s s s
L
L
L=
( )
α α
I
(21.50a)
Ψ Ψ
r
r
m
s s s
L
L
L
β β β
σ=
(
)
I
(21.50b)
e above equations are represented in Figure 21.14 as block diagrams in stationary αβ coordinates.
ere are many other methods for rotor ux estimation based on speed or position measurement.
Also, the observer tech ...
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Publisher Resources

ISBN: 9781439802861