4 Chopper-Controlled DC Motor Drive
4 Chopper-Controlled DC Motor Drive
4 Chopper-Controlled DC Motor Drive
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• The solution for the armature current in<br />
three time segments is<br />
V E<br />
i (t)<br />
s −<br />
(1 e a<br />
a = − ), 0 < t <<br />
R<br />
i<br />
a<br />
(t)<br />
=<br />
I<br />
a1<br />
e<br />
a<br />
(t−dT)<br />
−<br />
T<br />
a<br />
−<br />
−<br />
t<br />
T<br />
E<br />
R<br />
a<br />
(1 − e<br />
dT<br />
(t−dT)<br />
−<br />
T<br />
ia (t) = 0, (tx<br />
+ dT) < t <<br />
a<br />
),<br />
T<br />
dT<br />
≤<br />
t<br />
≤<br />
t<br />
x<br />
- dT