Assembly Instruction
Configuration
Torque Motor
TM-Komponenten-04-0-EN-2108-MA
Page 22 of 84
ω
max
= 2 ×
φ
t
ω
max
=
�α
×
φ
α
max
=
4φ
t
2
2
Torque calculation
The maximum torque can be calculated by the following equation.
T
max
= (J + J
L
) ×
α
max
+ T
f
= T
i
+ T
f
Where
T
i
is inertia torque,
T
f
is the torque caused by friction torque, cutting force or external force.
In most cases, the motions are cyclic point-to-point movements. The equivalent torque of a cyclic motion with a
dwell time of t_4 second can be calculated as below.
T
e
=
�
(T
i
+ T
f
)
2
× t
1
+ T
f
2
× t
2
+ (T
i
−
T
f
)
2
× t
3
t
1
+ t
2
+ t
3
+ t
4
3
Motor sizing and T-N curve confirmation
With the help of HIWIN’s motor specification, users can select the appropriate motor from peak torque and
equivalent torque, and ensure speed and torque under all operating conditions is within the range of the motor’s
T-N curve.
