User manual

QBL5704 Manual (V1.00 /09-May-2007) 7
Copyright © 2007, TRINAMIC Motion Control GmbH & Co. KG
4.2 Motor QBL5704-116-04-042
Measured with 36V supply voltage
Figure 4.2: QBL5704-116-04-042 Velocity vs. Torque Characteristics
5 Motor Sizing
For the optimum solution it is important to fit the motor to the application. The three key parameters
are peak torque requirement, RMS torque requirement and motor velocity.
5.1 Peak torque requirement
Peak torque T
P
is the sum of the torque due to acceleration of inertia (T
I
), load (T
L
) and friction (T
F
):
FLJP
TTTT ++=
The torque due to inertia is the product of the load (including motor rotor) inertia and the load
acceleration:
aJT
J
⋅=
The torque due to the load is defined by the configuration of the mechanical system coupled to the
motor. The system also determines the amount of torque required to overcome the friction.