Stober SD6 - Derating; Effect of the Clock Frequency; Size 3: Sd6 A3 X

ID 442426.04 32WE KEEP THINGS MOVING
Technical data
4
Manual SD6
4.2.2.4 Size 3: SD6A3x
Properties of the brake chopper
4.2.2.5 Derating
When dimensioning the drive controller, observe the derating of the nominal
output current depending on the clock frequency, surrounding temperature,
and installation altitude. There is no restriction for a surrounding temperature
from 0 °C to 45 °C and an installation altitude of 0 m to 1000 m. The details
given below apply to values outside these ranges.
4.2.2.5.1 Effect of the clock frequency
Changing the clock frequency f
PWM
affects the amount of noise produced by
the drive amongst other things. However, increasing the clock frequency
results in increased losses. During project configuration, define the highest
clock frequency and use it to determine the nominal output current I
2N,PU
for
dimensioning the drive controller.
Nominal output current I
2N,PU
[A]
Type SD6A34 SD6A36 SD6A38
U
1PU
3 x 400 V, +32 % / -50 %, 50/60 Hz;
3 x 480 V, +10 % / -58 %, 50/60 Hz
f
2PU
0 – 700 Hz
U
2PU
0 – max. U
1
P
V,PU
(I
2
= I
N
) 350 W 600 W 1000 W
Type SD6A34 SD6A36 SD6A38
f
PWM,PU
4 kHz
a)
a) Clock frequency adjustable from 4 to 16 kHz, see section 4.2.2.5 Derating.
I
1N,PU
45.3 A 76 A 76 A
I
2N,PU
44 A 70 A 85 A
b)
b) Specification applies for the default setting of the field weakening voltage limit: B92 = 80 %.
I
2maxPU
180 % for 5 s; 150 % for 30 s
Type SD6A34 SD6A36 SD6A38
f
PWM,PU
8 kHz
a)
a) Clock frequency adjustable from 4 to 16 kHz, see section 4.2.2.5 Derating.
I
1N,PU
37 A62 A76 A
I
2N,PU
30 A50 A60 A
I
2maxPU
250 % for 2 s; 200 % for 5 s
Type SD6A34 SD6A36 SD6A38
U
onCH
780 – 800 V
U
offCH
740 – 760 V
R
2minRB
15 Ω
P
maxRB
42 kW
switching frequency 4 kHz 8 kHz 16 kHz
SD6A02 4 3 2
SD6A04 2.3 1.7 1.1
SD6A06 4.5 3.4 2.3
SD6A14 10 6 4
SD6A16 16 10 5.7
SD6A24 22 14 8.1
SD6A26 32 20 12
SD6A34 44 30 18
SD6A36 70 50 31
SD6A38 85
a)
a) Specification applies for the default setting of the field weakening voltage limit: B92 = 80 %.
60 37.8
Information
Enter the defined clock frequency for setting up the drive controller
in B24.