06.2005 Engineering Information
Siemens AG 6SE7087-6QX70 (Version AE)
SIMOVERT MASTERDRIVES Compendium Motion Control 11-7
J
Load
GearMotor
ω
Load
M
Load
n
Load
Load
α
Fig. 11-4 Turning drive
♦ Speed under load [rpm]
n
load
load
=
⋅
⋅
ω
π
60
2
ω
load
Angular speed of the load [s
-1
]
α
b v load,
Angular acceleration/deceleration of the load [s
-2
]
♦ Load torque [Nm]
MJ
load load b v load
mech
sign
b v load
=⋅ ⋅α
η
α
,
()
,
1
η
mech
Mech. efficiency of the turning drive
α
b v load,
has to be applied with the correct sign (accelerate = +,
decelerate = - )
If the deceleration is equal to the acceleration, the load torque is at a
maximum during the acceleration phase.
Turning drive