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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
PSB 9000 3U Series
3.11.5 Sine wave function
The following parameters can be configured for a sine wave function. Following applies:
•
There is no preselection to which of both, source mode and sink mode, the function is applied to; the settings
decide whether it is “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 ( amplitude) of the wave and the current set
-
ting “I Sink” is not 0
Value
Range
Description
U(A), I(A)
0...(rated value - [Offs]) of U or I
A = Amplitude of the signal to be generated
U(Offs)
0... (U
Nom
- A)
Offs = Offset from the zero point of the mathematical sine curve
I(Offs)
- (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:
Of
fse
t
t
A
f
-A
Am
pl
itud
e
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 offset
can be positive or negative (I mode only).
For calculating the maximum power the current amplitude and the
offset value have to be added.
Example: a voltage of 100 V is set. The parameters for the sin(I)
function are: amplitude of 80 A and offset of +50 A. The resulting
maximum power when reaching the highest point of the sine wave
then is (80 A + 50 A) * 100 V = 13000 W for the source part and
when reaching the lowest point (sink part) it will be (50.A - 80 A)
* 100 V = -3000 W.
3.11.6 Triangular function
The following parameters can be configured for a triangular wave function. Following applies:
•
There is no preselection to which of both, source mode and sink mode, the function is applied to; the settings
decide whether it is “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 ( amplitude) of the wave and the current set
-
ting “I Sink” is not 0
Value
Range
Description
U(A), I(A)
0...(rated value - [Offs])
A = Amplitude of the signal to be generated
U(Offs)
0... (U
Nom
- A)
Offs = Offset, based on the foot of the triangular wave
I(Offs)
- (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
