A New Method of Utilizing Ultra-Capacitor Energy Sources in Hybrid Electric Vehicles Over a Wide Speed Range

In previous research, the authors introduced a unique method to directly use an ultra-capacitor (UC) without using a dc/dc converter as the peak traction power source of the (hybrid) electric vehicles. That method works well in urban driving cycles where the motor speed is usually lower than half rated speed. Considerable energy efficiency improvement was achieved compared to conventional methods using a dc/dc converter as the UC interface. However, the acceleration and braking at higher speeds with only ultra-capacitor sources still require a dc/dc converter. In this paper, a new methodology is proposed to directly use UC to provide peak power up to the full vehicle speed. Two UC charging options are also proposed. The overall cost reduction compared to the previous methods is considerable. Detailed simulations verify the effectiveness of the proposed methodology. Lab validation is ongoing.

[1]  Y. Baghzouz,et al.  Effectiveness of battery-supercapacitor combination in electric vehicles , 2003, 2003 IEEE Bologna Power Tech Conference Proceedings,.

[2]  Hamid A. Toliyat,et al.  Propulsion system design of electric and hybrid vehicles , 1997, IEEE Trans. Ind. Electron..

[3]  L.M. Tolbert,et al.  Direct torque control of induction machines using space vector modulation , 1991, Conference Record of the 1991 IEEE Industry Applications Society Annual Meeting.

[4]  C. C. Chan,et al.  The state of the art of electric and hybrid vehicles , 2002, Proc. IEEE.

[5]  B. Zile,et al.  Power distribution control coordinating ultracapacitors and batteries for electric vehicles , 2004, Proceedings of the 2004 American Control Conference.

[6]  T.G. Habetler,et al.  A survey of efficiency-estimation methods for in-service induction motors , 2006, IEEE Transactions on Industry Applications.

[7]  Marian P. Kazmierkowski,et al.  Direct torque control of PWM inverter-fed AC motors - a survey , 2004, IEEE Transactions on Industrial Electronics.

[8]  Juan Dixon,et al.  Design, construction and performance of a buck-boost converter for an ultracapacitor-based auxiliary energy system for electric vehicles , 2003, IECON'03. 29th Annual Conference of the IEEE Industrial Electronics Society (IEEE Cat. No.03CH37468).

[9]  Marco Amrhein,et al.  Dynamic simulation for analysis of hybrid electric vehicle system and subsystem interactions, including power electronics , 2005, IEEE Transactions on Vehicular Technology.

[10]  B. J. Arnet,et al.  High power DC-to-DC converter for supercapacitors , 2001, IEMDC 2001. IEEE International Electric Machines and Drives Conference (Cat. No.01EX485).

[11]  S. Onoda,et al.  PSIM-based modeling of automotive power systems: conventional, electric, and hybrid electric vehicles , 2004, IEEE Transactions on Vehicular Technology.

[12]  A. Bouscayrol,et al.  Design and Control of a supercapacitor storage system for traction applications , 2005, Fourtieth IAS Annual Meeting. Conference Record of the 2005 Industry Applications Conference, 2005..

[13]  J. C. Balda,et al.  Design methodology of a combined battery-ultracapacitor energy storage unit for vehicle power management , 2003, IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03..

[14]  Tsorng-Juu Liang,et al.  Novel high-efficiency step-up converter , 2004 .