Losses Minimization Control for an Integrated Multidrive Topology Devoted to Hybrid Electric Vehicles

Abstract

This paper deals with the study and implementation of a losses minimization control strategy for an integrated multidrive (IMD) topology used in the drivetrain of parallel hybrid electric vehicles. In this IMD, the stator sections of a multiwinding induction machine are interfaced to the storage units through standard three-phase inverters. The goal of this study is to optimize the management of multidirectional power flows in an IMD configuration, reducing both the power losses of the induction machine and the energy storage units while keeping the computational complexity suitably low. To this aim, the proposed approach consists in a control strategy that continuously searches for the best compromise between the torque response and the power capability of each storage unit while minimizing the overall power losses. Using such an approach, a significant improvement in the overall efficiency is obtained. Simulations and experimental tests confirm the effectiveness of the proposed method. Index Terms-Automotive, energy efficiency, hybrid electric vehicles (HEVs), hybrid energy storage, induction motor drives, maximum torque per ampere (MTPA), multiwinding motor drives, starter alternator. NOMENCLATURE ω, ω rm Angular speed of the qd0 reference frame and mechanical rotor speed. v qs , i qs , λ qs q-axis stator voltage, current, and flux. v ds , i ds , λ ds d-axis stator voltage, current, and flux. i qsj , i dsj q-axis and d-axis components of the current in the jth sub-machine. I sj Peak value of the stator current in the jth sub-machine. R s , L ls Stator resistance and leakage inductance. R r , L lr Rotor resistance and leakage inductance.

Online Estimation of Three-Phase Induction Motor Parameters Using an Extended Kalman Filter for Energy Saving

“…The forward Euler method is utilized to transform the continuous model into a discrete model. Therefore, the discrete state model of the three-phase IM is shown in Equation (12), where…”

“…Therefore, in this paper, an energy-saving method for a three-phase IM is proposed. In previous works, energy-saving methods such as frequency control [4,5], flux control [6][7][8][9], optimal balance of the stator current on the d-axis (i ds ) and the q-axis (i qs ) [10][11][12][13] and i ds control [14] were reported. In the present work, the minimum power loss (P loss ) is computed using the partial derivative of P loss with respect to i ds that is equal to 0.…”

Performance Improvement of Grid-Connected Induction Motors through an Auxiliary Winding Set

“…On the contrary, the same DWIM operated at PF = 0.9 and a load equal to 20%T n , will require a i ds2 = 40A, yielding a ∆P loss /P loss less than 0.8%, significantly reducing the efficiency improvement of the DWIM. The implementation of a losses minimization algorithm is not the focus of the paper, and more details on how to approach this aspect can be found in [30].…”

Evaluation of the Efficiency Performance of 3-Phase, 6-Switch PFC Circuit Based on the Used 1.2 kV SiC Transistor

“…However, it should be noted that the research of circuit topologies of individual stages of the mentioned concept is constantly improving and being perfected. Our discussion concerns a circuit solution, but also a technological one, specifically in terms of the production of semiconductor elements or magnetic components [6][7][8][9]. If we now focus specifically on circuit solutions, we will deal in more detail with the possibilities of solving the input element, i.e., the PFC converter.…”