User Manual

Page 64
EA Elektro-Automatik GmbH
Helmholtzstr. 31-37 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
[e-mail]
PSB 9000 2.5 kW Series
3.11.5 Sine wave function
Restrictions which apply particularly to this function:
• There is no preselection to which of both, source mode and sink mode, the function is applied to; the settings
decide whether it’s “source mode only”, “sink mode only” or a mixture of both
• When applying the function to the voltage, the device can only switch to and work in sink mode if the external
voltageon theDCterminalishigherthan thehighestpoint(o󰀨set+amplitude)ofthewaveandthe current
setting “I Sink” isn’t 0
Thefollowingparameterscanbeconguredforasinefunction:
Value Range Description
U(A), I(A) 0...(ratedvalue-[O󰀨s])ofUorI A = Amplitude of the signal to be generated
U(O󰀨s) 0... (U
Nom
- A)
O󰀨s=O󰀨setfromthezeropointofthemathematicalsinecurve
I(O󰀨s) - (I
Nom
- A)...+(I
Nom
- A)
f (1/t) 1...10000 Hz Static frequency of the signal to be generated
Schematic diagram: Application and result:
Offset
t
U,I
f
-I
Amplitude
A sine wave signal is generated and applied to the selected set
value, e. g. the current (I mode). Depending on the adjusted
parameters the device can either apply the wave either solely
to sink mode or to source mode, but also to both with automatic
switchover at zero point. The scheme on the left depicts the “mixed
mode” run (yellow = source mode active, green = sink mode ac-
tive).Whiletheamplitudeisalwaysanabsolutevalue,theo󰀨set
can be positive or negative (I mode only).
For calculating the maximum power the current amplitude and the
o󰀨setvaluehavetobeadded.
Example: a voltage of 30 V is set as static value. The parameters
forthesin(I)functionare:amplitudeof40Aando󰀨setof+30A.
The resulting maximum power when reaching the highest point of
the sine wave then is (40 A + 30 A) * 30 V = 2100 W for the part
in source mode and when reaching the lowest point (sink mode)
it will be (40 A - 30 A) * 30 V = -300 W.
3.11.6 Triangular function
Restrictions which apply particularly to this function:
• There is no preselection to which of both, source mode and sink mode, the function is applied to; the settings
decide whether it’s “source mode only”, “sink mode only” or a mixture of both
• When applying the function to the voltage, the device can only switch to and work in sink mode if the external
voltageon theDCterminalishigherthan thehighestpoint(o󰀨set+amplitude)ofthewaveandthe current
setting “I Sink” isn’t 0
Thefollowingparameterscanbeconguredforatriangularfunction:
Value Range Description
U(A), I(A) 0...(ratedvalue-[O󰀨s]) A = Amplitude of the signal to be generated
U(O󰀨s) 0... (U
Nom
- A)
O󰀨s=O󰀨set,basedonthefootofthetriangularwave
I(O󰀨s) - (I
Nom
- A)...+(I
Nom
- A)
t1 0.1 ms...36000 s RisingedgetimeΔtofthetriangularwavesignal
t2 0.1 ms...36000 s FallingedgetimeΔtofthetriangularwavesignal