Stober PS6A34 - Symbols in Formulas

16 | Appendix STOBER
246
02/2019 | ID 442728.05
16.6 Symbols in formulas
Symbol Unit Explanation
C
1max
F Maximum input capacitance
C
maxPU
F Charging capacity of the power unit
C
PU
F Self-capacitance of the power unit
D
IA
% Reduction in the nominal current depending on the installation altitude
D
T
% Reduction in the nominal current depending on the surrounding temperature
E
2max
J Maximum switch-off energy at the output
f
1max
Hz Maximum input frequency
f
2max
Hz Maximum output frequency
f
2PU
Hz Output frequency of the power unit
f
N
Hz Rotating magnetic field frequency at nominal speed
f
PWM,PU
Hz Frequency of the pulse width modulation of the power unit
I
0
A Stall current
I
1max
A Maximum input current
I
1maxCU
A Maximum input current of the control unit
I
1maxPU
A Maximum input current of the power unit
I
1N,PU
A Nominal input current of the power unit
I
2max
A Maximum output current
I
2maxPU
A Maximum output current of the power unit
I
2PU(A)
A Output current of the power unit for axis A
I
2PU(B)
A Output current of the power unit for axis B
I
2N,PU
A Nominal output current of the power unit
I
N
A Nominal current
I
N,MF
A Nominal current of the choke or motor filter
n
N
rpm Nominal speed: The speed for which the nominal torque M
N
is specified
p – Number of pole pairs
P
effRB
W Effective power at the external braking resistor
P
maxRB
W Maximum power at the external braking resistor
P
N,PU
W Nominal power of the power unit
P
V
W Power loss
P
V,CU
W Power loss of the control unit
R
2minRB
Ω Minimum resistance of the external braking resistor
ϑ
amb
°C Surrounding temperature
ϑ
amb,max
°C Maximum surrounding temperature
t
min
ms Minimum cycle time of the application
τ
th
°C Thermal time constant
U
1
V Input voltage
U
1CU
V Input voltage of the control unit