The physical load type and the equipment determine the torque-speed characteristic
, while the level is set by the actual conditions such as moving loads uphill or downhill.
It should be noted that the torque-speed characteristic
of this type of motor does not follow the typical torque-speed characteristic
of radial induction motors.
Four different characteristics are evolved from the investigations namely, the torque-speed characteristic
, the mechanical power-speed characteristic, the output power-speed characteristic and the efficiency-speed characteristic.
Dynamic measurement of the torque-speed characteristics
of dental high speed air turbine handpieces, Australian dental journal 39(1):33-8.
play an important role in designing the proper motor power rating, which is the primary consideration with respect to performance specifications.
Measured mechanical torque-speed characteristics
at Udc = 18.
The SRM's drive performance is strongly dependent on its design and control, which allows for torque ripple reduction , or for improving of the torque-speed characteristics
Figure 1 shows torque-speed characteristics
as obtained at the pinion on the crown gear level, when machining with constant torque (Botez, 1977)--condition specific to heavy machine tools--and the main motor has the following parameters: rated power [P.