Passivity based control of DC motor in sensorless configuration is proposed in this paper. Exact tracking error dynamics passive output feedback control is used for stabilizing the speed of Buck converter fed DC motor under various load torques such as constant type, fan type, propeller type, and unknown load torques. Under load conditions, sensorless online algebraic approach is proposed, and ...

During this season, due to high running costs of the slewing loader,an exercise wascarriedout to compare the slewing loader and the hi-capacity Bell loaders. The slewing loader in use at the time was the model with high lift boom mounted on a Ford 6600, modified with a Brockhouse torque converter. The comparison revealed that, under the conditions obtaining at Mgayi section, the Bell loader was...

Tradeo s between low feedgas emissions and smooth brake torque are discussed in the context of an engine equipped with variable camshaft timing VCT The use of VCT lowers the generation of feedgas emissions but adversely a ects the torque response However with the addition of an electronic throttle and knowledge of online torque the tradeo s between emissions and drivability in the VCT engine ca...

Hydraulic torque converter is widely used in transmission units as it able to provide variable speed and ratio, isolate vibration, absorb shock. The pursuit of a highly packed power unit requires high capacity/speed converter, consequently resulting higher risk for cavitation severe performance degradation, noise, even failure. Existing models generally focus on water, the empirical parameters ...