Non-linear transformer, rectifier, 20ohm load, steady state response
The same model as in the previous example is used:
* Main voltage
V1 1 2 0V SIN 0V 312V 50HZ
* Graetz
D1 6 8 DN4001
D2 7 8 DN4001
D3 0 6 DN4001
D4 0 7 DN4001
.MODEL DN4001 D (IS=1.4N RS=0.04 N=1.7 TT=5U CJO=55P VJ=0.34 MJ=0.38
BV=75)
* Capacitor
C 8 0 1000UF
* Load
RB 8 0 20
Steady state response, H(t) [A/m]. Time is measured
in [s].
Steady state, B(t) [T].
Steady state response, i1(t) [A].
Steady state response, i2(t) [A].
The picture shows when the diodes are open; the transformer
provides current.
Note that the magnetization current flows through
the primary coil even when the transformer is not supplying current for
the load.
Steady state response, uRb(t) [V].
Load voltage. The frequency of the ripple voltage
is twice the main voltage frequency.
The voltage ripple is 4V (about 22% of the DC voltage).
This is obviously a useless rectifier. But it is
good for learning basics :)
Diode currents, D1 (iD1(t) [A]) and D2
(iD2(t) [A]).
I won't say this again. You should've remembered
it from the previous example.
Capacitor current iC(t) [A].
|
