During operation
6-3
BA9300SU EN 2.1
6.2.2
Controller protection by current derating
Valid for the types 9326 to 9332.
For field frequencies < 5 Hz the controller automatically derates the maximum permissible output
current.
•
For operation with chopping frequency = 8 kHz (C0018=1, optimum power):
– The current is derated, depending on the heat sink temperature (see Fig. 6-2).
•
For operation with chopping frequency = 16 kHz (C0018=2, optimum noise):
– The current is always derated to I
r16
= I
016
.
•
For operation with automatic change-over of the chopping frequency (C0018=0):
– Below the threshold, the controller operates with 16 kHz (optimum noise). The function of
the current derating follows the characteristic ” Imax 16 kHz” (see Fig. 6-2).
– If a higher torque is required from the machine for example for acceleration, the controller
automatically switches to 8 kHz (optimum power). The function of the current derating
follows the characteristic ” Imax 8 kHz” (see Fig. 6-2).
K35.0129
| f
d
| [ H z ]
0
5
J
K
>
8 0
° C
J
K
= 6 0
° C
J
K
< 4 0 ° C
I
0 x
1 . 5 * I
0 8
1 . 2 5 * I
0 8
I
0 8
I
0 1 6
I
M o t o r
1 . 5 * I
r 8
= I
m a x
a t 8 k H z
I
r 1 6
= c h a n g e o v e r t o 8 k H z
a t C 0 0 1 8 = 0
1 . 5 * I
r 8
= I
m a x
a t 1 6 k H z
Fig. 6-2
Current derating function of the controllers 9326 to 9332.
ϑ
K
Heat sink temperature
I
rx
Rated current at U, V, W depending on the chopping frequency
f
d
Field frequency at the output U, V, W
I
0x
max. standstill current for field frequency = 0 Hz
See chapter “Rated data”. (
^
3-3
)
Summary of Contents for EVS9321-CS
Page 3: ...Operating Instructions EDB9300UES 00414796 Global Drive 9300 servo ...
Page 21: ...Technical data 3 8 BA9300SU EN 2 1 ...
Page 57: ...Installation 4 36 BA9300SU EN 2 1 ...
Page 73: ...During operation 6 4 BA9300SU EN 2 1 ...
Page 117: ...Troubleshooting and fault elimination 9 10 BA9300SU EN 2 1 ...
Page 119: ...Maintenance 10 2 BA9300SU EN 2 1 ...
Page 188: ...Appendix 11 69 BA9300SU EN 2 1 ...
Page 189: ...Appendix 11 70 BA9300SU EN 2 1 ...
