TM 5-3895-374-24-1
Recommendations for use
of the motor/speed controller combination
Adaptation to the
The motor/speed controller combination must be adequately rated to
motor load
- overcome the load torque of the motor load over the whole speed range used,
- supply the transient overtorque needed for the required accelerations, see curves p 31
If braking is required for rapid deceleration, refer to the following possibilities
-DC injection braking (p 25),
- slow-down braking (p 62)
Precautions to be taken according to the type of machine load
- constant torque load (conveyors)
ensure that the starting torque is compatible with the available overtorque,
-quadratic torque load (fans and centrifugal pumps)
adjust the U/f ratio (p 48) and override the slip compensation (p 45),
the torque increases rapidly with the speed, and it may be necessary to limit the maximum
speed so that the motor/speed controller combination’s capabilities are not exceeded,
- constant power load (winders)
check the speed range,
If torque is highest at low speed, check the torque capability at the lowest speed, provide
forced ventilation if necessary,
- driving load/high inertia examine the braking possibilities (p 62), and use if needed
particular adjustments (p 81),
- machines with fast cycles :
refer to part 2 of this document "Special applications" (p 81)
Adaptation to the
If a suitable mains supply is not available, the controller can be supplied via a three phase
mains supply
transformer or autotransformer, rated as follows
ATV-452075 (M) (N)
1,5 kVA
ATV-452D15 (M) (N) (S)
22 kVA
ATV-452U15 (N)
3 kVA
ATV-452D18N
28 kVA
ATV-452U22 (M) (N)
4 kVA
ATV-452D22 (N)
32 kVA
ATV-452U30
5,5 kVA
ATV-452D30 (N) (S)
45 kVA
ATV-452U40 (M) (N) (S)
7 kVA
ATV-452D37 (N)
52 kVA
ATV-452U55 (M) (N)
9 kVA
ATV-452D55 (N) (S)
75 kVA
ATV-452U75 (M) (N) (S)
12 kVA
ATV-452D75 (N)
100 kVA
ATV-452D11 (M) (N)
16 kVA
ATV-452D90 (N)
125 kVA.
(page 3-186
