Automotive Technology R and D Laboratories

Japan

Automotive Technology R and D Laboratories

Japan
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Kantou T.,Automotive Technology R and D Laboratories | Yamamoto S.,Automotive Technology R and D Laboratories | Kato M.,Automotive Technology R and D Laboratories | Keishi T.,Analysis Technology Research Center | Sawai T.,Automotive Technology R and D Laboratories
SEI Technical Review | Year: 2010

Sumitomo Electric Industries, Ltd. is working to develop low-cost and compact reactors, which contribute to the improvement of the converter. We have developed an original tool for reactor electromagnetic/thermal design based on logic equations and Computer Aided Engineering (CAE). In our study, the predicted values calculated using the tool were found to be highly consistent with observed values and the development time of the reactor was successfully shortened. This paper reports the details of our development.


Yoshikawa K.,Automotive Technology R and D Laboratories | Kitajima M.,Automotive Technology R and D Laboratories | Kawaguchi H.,Automotive Technology R and D Laboratories | Ito A.,Automotive Technology R and D Laboratories | And 2 more authors.
SEI Technical Review | Year: 2011

Sumitomo Electric Industries, Ltd. is working to develop low-cost and compact reactors, which contribute to the improvement of converters. We reviewed the conventional structure, which used aluminum cases, and have developed a resin-molded reactor that allows us to eliminate aluminum cases and some other parts. We have succeeded in downsizing of the reactor and lowering its production cost. This paper reports the details of our development.


Zheng X.,Automotive Technology R and D Laboratories | Ishimine T.,Advanced Materials R and D Laboratories | Yamamoto S.,Automotive Technology R and D Laboratories | Tokuoka T.,Advanced Materials R and D Laboratories | And 4 more authors.
SEI Technical Review | Year: 2012

Sumitomo Electric Industries, Ltd. has developed magnetic powder core materials for power inductors used in eco-friendly vehicles. Pure iron based powder cores with an operating frequency range from 10 kHz to 30 kHz have been used for boost converter reactors in hybrid-electric vehicles (HEVs), while low-loss Fe-Si-Al alloy powder cores with an operation range of several hundred kHz have shown the potential to replace ferrite cores for buck converter choke coils. Our lowloss alloy powder cores are also a competitive alternative for choke coils in plug-in HEV and EV on-board chargers, which generally operate in a range from 50 kHz to 200 kHz. This paper compares differences in size, weight, power loss, and DC-bias characteristics between E-type choke coils that are respectively designed with the Fe-Si-Al alloy powder cores and ferrite cores for the power factor correction (PFC) of the charger. The simulation results show that alloy powder cores significantly reduce the size and weight of choke coils compared with ferrite cores. This paper also describes a new choke coil structure that we have developed to improve the heat dissipation of E-type choke coils. The experimental results indicate that the newly designed coil has a lower operating temperature than that of E-type choke coils.


Shinzato T.,Automotive Technology R and D Laboratories | Arakawa S.,Automotive Technology R and D Laboratories | Oyama H.,Automotive Technology R and D Laboratories | Saka H.,Automotive Technology R and D Laboratories | Hayasaki T.,Automotive Technology R and D Laboratories
SEI Technical Review | Year: 2012

In recent years, electrification of automobiles is in progress. Following the advent of passenger electric vehicles, large size commercial vehicles with electric drive are also being developed. One of the problems in the development of large electric vehicles is the heavy weight which leads to short driving distances. Energy saving by the use of high-efficiency motors will be a solution. The authors have developed a prototype electric vehicle equipped with a high-temperature superconducting motor and a refrigerator. The test results showed that the motor has torque of 136 Nm and an output of 30 kW, and the prototype vehicle obtains the maximum speed of 80 km/h.


Saito H.,Automotive Technology R and D Laboratories | Hatanaka K.,Automotive Technology R and D Laboratories | Hayasaki T.,Automotive Technology R and D Laboratories
SEI Technical Review | Year: 2012

To reduce traffic accidents and serious injuries at intersections, development of cooperative driving support systems and related sensors has been promoted. Along with this movement, the authors have developed a "hybrid image sensor" that consists of visible-ray cameras and far-infrared-ray (FIR) cameras to compensate each other. The images taken by these cameras are processed simultaneously, thereby covering various conditions including nighttime, shadows, and high temperature. The authors have also established an algorithm to detect pedestrians. This paper outlines the developed hybrid image sensor and pedestrian detection algorithm along with their evaluation results.

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