Technical terms
This chapter provides information on various technical terms and their meaning.
Holding torque TH [Nm]
The holding torque states the torque that the energized motor can hold at standstill without causing continuous rotation of the rotor.
Rotor moment of inertia
J [kgcm²]
Measure of the acceleration capacity of the motor. For example, at J0 the acceleration time tb from 0 to 3000 min-1 can be calculated based on the following formula:
with M0 in Nm and J in kgcm2
Winding inductance
L [mH]
Indication of the motor inductance. It is the mean value for one motor revolution, with two energized phases, at 1 kHz. Saturation of the motor must be taken into account.
Winding resistance
R [Ω]
Specification of the resistance of a motor phase, measured at 25 °C. The winding resistance indicates the electrical resistance of the motor’s coil winding