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EA Elektro-Automatik GmbH
Helmholtzstr. 31-37 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
PSI 9000 DT Series
Schematic diagram:
Applications and results:
Sta
rt (D
C)
t
U,I
Seq.time
En
d (
DC
)
Example 2
Focussing 1 cycle of 1 sequence point:
The DC values of start and end are the same but the AC (amplitude)
isn’t. The end value is higher than the start value so the amplitude
increases continuously with each new half sine wave through the
sequence point. This, of course, only if the sequence point time and
frequency allow for multiple waves to be generated. For instance,
with f = 1 Hz and Seq. time = 3 s, three complete waves would be
generated (at Angle = 0°) and reciprocally the same for f = 3 Hz and
Seq. time = 1 s.
Sta
rt (D
C)
t
U,I
Start (AC)
End (AC)
Seq.time
En
d (
DC
)
Sta
rt (D
C)
t
U,I
Start (AC)
End (AC)
Seq.time
En
d (
DC
)
Example 3
Focussing 1 cycle of 1 sequence point:
The DC values of start and end are unequal, so are the AC values. In
both cases the end value is higher than the start value so the offset
increases from start to end (DC) and the amplitude also increases
with each new half wave.
Additionally, the first wave starts with the negative half because the
start angle has been set to 180°. The angle can be shifted at will in
1° steps between 0° and 359°.
Sta
rt (D
C)
t
U,I
f (start)
f (end)
Seq.time
En
d (
DC
)
Example 4
Focussing 1 cycle of 1 sequence point:
Similar to example 1 but with a different end frequency. Here the
wave depicted on the left shows the end frequency to be higher. This
impacts the period of the sine waves such that each new wave will
be shorter over the total span of the sequence point time.
Sta
rt (D
C)
t
U,I
Seq.time
En
d (
DC
)
Example 5
Focussing 1 cycle of 1 sequence point:
Similar to example 1 but with a start and end frequency of 0 Hz. With-
out a frequency no sine wave part (AC) will be generated and only
the DC settings will be effective. A ramp with a horizontal progression
is generated, like it’s required for a trapezium.
Sta
rt (D
C)
t
U,I
Seq.time
En
d (
DC
)
Example 6
Focussing 1 cycle of 1 sequence point:
Similar to example 1 but with a start and end frequency of 0 Hz.
Without a frequency no sine wave part (AC) will be created and only
the DC settings will be effective. Here start and end values are un
-
equal and a steadily increasing ramp is generated, like it’s used with
triangular, trapezoidal and ramp functions. Setting End (DC) > Start
(DC) would turn the ramp into a falling one (ramp down).
Summary of Contents for PSI 9000 DT Series
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