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- 저자 : Dianguo Yin (검색결과 2 건)
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Optimal Stator-Current Trajectory Control of an IPM Synchronous Machine for Hybrid Electric Vehicles
Z. Xu,R. Datta,G. X.Yin,Dianguo Xu 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
This paper describes an optimal stator-current control strategy for an Integrated Starter-Alternator (ISA) prototype. Based on the applications of hybrid electric vehicles with wide constant power speed range, this paper investigates the various operation stages for the interior permanent magnet machine, including the maximum torque per ampere (MTPA), flux weakening control and maximum output power stage. A control algorithm was proposed to optimize the stator-current trajectories. Through the algorithm, the d-axis and q-axis components of the stator current were driven on the optimal trajectories to produce the desired torque and to maintain system stability under the voltage limit and current limit. The system takes full advantage of the capacity of the driving converter, and the maximum output torque was generated by the motor at any time. The reliability and dynamic performance of system were rather satisfactory. Energy optimization was achieved. The results from simulation and the real platform experiment verify the feasibility and advantages of the system.
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Mingjin Zhang,Jinxiang Zhang,Junting Long,Yongle Li,Yulin Zou,Dianguo Yin 대한토목학회 2022 KSCE Journal of Civil Engineering Vol.26 No.12
Due to the complexity and changeability of the wind field in deep-cut gorges, the vehicles on the bridge deck are easily affected by a strong crosswind. Thus, to accurately evaluate the wind field characteristics of a suspension bridge deck, the wind profiles of wind speed and angle of attack (AoA) and the vehicle aerodynamic parameters were investigated by the CFD. The results show that the shape of wind speed profile is mainly controlled by the AoA but less affected by the Reynolds number. The main girder's shielding effect can accelerate the local wind field, and the closer to the windward lane, the less the interference; thus, a suitable location of measuring points to represent the incoming flow is found. Furthermore, the equivalent wind speed based on the equivalent side force is generally larger than the value based on the rolling moment, and the responding value is greatly affected by the AoA. In addition, the vortex is a time-dependent phenomenon, the averaged flow field produced less force in the wake, but the high local wind speed variations may affect the traffic unfavorably. The results provide an essential reference significance for studying the local wind field characteristics of the bridge deck.
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