SEW-Eurodrive MOVIDRIVE compact MCH41A, System Manual

Page: 190 / 436

190
System Manual – MOVIDRIVE® compact Drive Inverters
4
Motor selection for asynchronous AC motors (VFC)
Project Planning
Examples for motor selection for delta/star AC 230/400 V
Trolley drive Constant load with overload (acceleration) and low load during travel:
• P
travel
= 1.3 kW
• P
max
= 13 kW
• n
min
= 270 1/min, setting range 1:10
• n
max
= 2610 1/min
In inverter mode with adapted power (P = P
n
), the motor can output 150 % of its listed
power during the acceleration phase. The following applies:
P
Mot
= P
max
: 1.5 = 13 kW : 1.5 = 8.67 kW
A DV132M4 motor with delta connection (P
n
= 9.2 kW) is selected.
The selection table (
→
page 189) allocates a MOVIDRIVE
®
compact MCF60A0110
(P = P
n
).
Hoist drive
High constant load with short-term overload (acceleration):
• P
max
= 26 kW
• P
const.
= 20 kW
• Setting range 1:15, low speed only for positioning
• Brake applied when the drive is at a standstill
• Load type S3 (40 % cdf)
The inverter can yield 150 % of its rated current during acceleration. Consequently, a
MOVIDRIVE
®
compact
MCF60A0220 is selected.
In view of the load type (S3, 40 % cdf), the selection table allocates motor type DV180L4
(P
n
= 22 kW) in a star connection.
For further information
→
section "Project planning" in the MOVIDRIVE
®
compact
system manual.
Fan/pump Variable torque load with the following power values:
• P
max
= 4.8 kW
• n
max
= 1,400 1/min, continuous duty with n
max
The motor can be operated at its listed power (P = P
n
) even without forced cooling due
to the quadratically falling torque. Therefore, the motor type DV132S4 in star connection
(P
n
= 5.5 kW) is sufficient.
The selection table allocates a MOVIDRIVE
®
compact MCF60A0055 (P = P
n
). Howev-
er, as there is a variable torque load without overload, the inverter can be operated with
increased output power. Consequently, a MOVIDRIVE
®
compact MCF60A0040 is suf-
ficient.