Torque

Manufacturers Representatives

TORQUE (mN·m) = FORCE (mN) × RADIUS (m)

Torque = FR

TORQUE REQUIRED TO ACCELERATE INERTIAL LOAD

T (mN·m) = J a

J = Inertia in g·m²
a = Acceleration in radians/sec²

EXAMPLE
If a rotor inertia plus load inertia = J = 2 x 10³ g·m², and the motor is to be accelerated at 6,000 radians per sec, what torque is required?

T = J a = 2 × 10³ × 6000
T = 12 mN·m

For stepper motors, a can be converted to radians/sec² from steps/sec².

a (radians/sec)

=

dv (steps/sec)

×

2*pi

steps/rev