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DEVELOPMENT OF INVERTER AND POWER CAPACITORS FOR MILD HYBRID VEHICLE(MHV)-TOYOTA"CROWN"
Y. SHIDA,M. KANDA,K. OHTA,S. FURUTA,J. ISHII 한국자동차공학회 2003 International journal of automotive technology Vol.4 No.1
The 42V Mild Hybrid System has been released into market by Toyota for the first time in the world in 2001. The set-up employs an inverter unit to control the motor/generator (MG) electronically. The driving system called such as Toyota Mild Hybrid System (TMHS) has additional new functions to conventional internal combustion engines. When stopping vehicle, the engine stops promptly. When starting vehicle. by releasing the brake pedal MG starts the vehicle at the same time (EV-driving mode). When stepping on the accelerator pedal. or after a given period of time the engine firing occurs and the engine-driving mode starts. When running by motor. the power is supplied to the motor from 36V battery through the inverter. High outputs and instant responses are required for Inverter. At the same time. the compact volume is required to fit into the limited space of the engine room. The compact size and high output are also required to Power Capacitor used for this inverter. The power capacitors has been newly developed. shaped in "flat" type. suitably for the inverter. The points of developments on inverter and power capacitor are described in this paper<br/>
DEVELOPMENT OF INVERTER AND POWER CAPACITORS FOR MILD HYBRID VEHICLE (MHV) - TOYOTA "CROWN"
Shida, Y.,Kanda, M.,Ohta, K.,Furuta, S.,Ishii, J. The Korean Society of Automotive Engineers 2003 International journal of automotive technology Vol.4 No.1
The 42V Mild Hybrid System has been released into market by Toyota for the first time in the world in 2001. The set-up employs an inverter unit to control the motor/generator (MG) electronically. The driving system called such as Toyota Mild Hybrid System (TMHS) has additional new functions to conventional internal combustion engines. When stopping vehicle, the engine stops promptly. When starting vehicle, by releasing the brake pedal MG starts the vehicle at the same time (EV-driving mode). When stepping on the accelerator pedal, or after a given period of time the engine firing occurs and the engine-driving mode starts. When running by motor, the power is supplied to the motor from 36V battery through the inverter. High outputs and instant responses are required for Inverter. At the same time, the compact volume is required to fit into the limited space of the engine room. The compact size and high output are also required to Power Capacitor used for this inverter. The power capacitors has been newly developed, shaped in "flat" type, suitably for the inverter. The points of developments on inverter and power capacitor are described in this paper.his paper.
T. Kanashima,M. Okuyama,H. Kanda,K. Ikeda,M. Sohgawa 한국물리학회 2003 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.42 No.IV
High-k thin lms of ZrO2, PrOx of 10 nm thickness have been prepared by pulsed laser deposition, and characterized in microscopic structure and electrical properties. Crystallization is promoted in ZrO2 lms deposited above 400 C, but a signicant XRD peak was not observed in the ZrO2 lm grown below 400 C. The leakage current is decreased by increasing growth temperature, but an equivalent-oxide thickness (EOT) obtained from accumulation capacitance of C .. V characteristics becomes large. The lms deposited at 400 C were annealed at 400 C in O2 gas to reduce the leakage. The leakage current change to be small, but the EOTs become large. Oxygen radical annealing is carried out to reduced the leakage, and is eective for ZrO2 thin lm. On the other hand, only small improvement is observed in the PrOx lms.