The simulation results found when combining inverter-DSIM are similar to results found by simulating the DSIM supplied by a balanced source direct, but with the presence of harmonics at the electromagnetic torque, the torque-speed characteristic
, of the stator and rotor currents and flux.
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.
The back EMF, efficiency, torque-speed characteristic
, and torque output have been measured, and good agreement between the simulation and experimental results has been found.
The output performances of steering system, used on board of automobile, demand: high reliability, reduced investment, size and mass, low noise level and capability to operate in a wide speed range (in the constant power region of the torque-speed characteristic
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.
1 illustrates the torque-speed characteristics
of the IPMSM during the complete operating range.
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 = 18.5 V.
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
. Therefore, it is important to develop an accurate and simple mathematical model of SRM, which facilitates the real-time control of the SRM drive system, or the design process.
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.sub.N] = 100 KW, [n.sub.nom] = 1500 rpm, [n.sub.max] = 4500 rpm.