HEIDENHAIN TNC 410 M Technical Manual page 444

QAN asynchronous
motors
7 – 22
The characteristic curves for the HEIDENHAIN asynchronous motors were
determined at a dc-link voltage of 565 V or 650 V. If a motor is operated at a
different dc-link voltage, the characteristic curve must be adjusted.
If the power characteristic lies above the breakdown-torque speed, it must be
multiplied by a factor k.
⋅ k
= P
P
new old
With
2
(U )
Znew
k =
2
(U )
Zold
The torque characteristic above the breakdown-torque speed must be newly
calculated as follows:
⋅
P
new
M =
60
new
2 ⋅ π ⋅
n
Example:
QAN 134B: P = 12.0 kW at n = 7000 rpm (see diagram) and 565 V
old
P at n = 7000 rpm and 650 V
new
M at n = 7000 rpm and 650 V
new
2
( )
650 V
= -------------------------- - = 1,32
k
2
( )
565 V
= 12 kW ⋅ 1.32 = 15.84 kW
P
new
15840 W
=
-------------------------------------------------- -
M
new
⋅ π ⋅
2 7000 min
HEIDENHAIN Technical Manual for Inverter Systems and Motors
⋅
60
21,60 Nm
=
1
–