Torque harmonic reduction in hybrid vehicles

Abstract

In this paper, the authors propose a novel control strategy of torque ripple reduction in hybrid vehicles. The Internal Combustion Engine (ICE) ripples are reduced by an active filter and a Permanent Magnet Synchronous Machine (PMSM). This electric motor is mounted on the crankshaft in order to generate a torque sequence opposing ripple torque. The control strategy is based on a static output feedback synthesis. The problem is reformulated in the time domain with regard to the main order of the fluctuations. An hybrid propulsion complete modeling is achieved from an experimental benchmark. The model is performed at low speed (900rpm). In fact, at this speed, the ripple is very restrictive. Simulation results highlight the control approach interest.

Failure Mechanism of the Transmission Shaft of a New Power Split Hybrid Vehicle

“…Kamran A. Gul [6] has significantly reduced the torsional vibration amplitude by modifying inertia and stiffness properties of the driveline based on sensitivity analysis. As for an electrical vehicle, advanced control methods applied to the motor and/or the generator can also reduce vibration dramatically [7][8][9], referring to the good performances of electrical motors. Similar to the power train in a petrol-powered vehicle, the torsional vibration suffered by a hybrid driveline is also due to the torque fluctuation of the internal combustion engine, as the electrical motor has little torque ripples.…”