Hideki Miyazaki Tatsuyuki Yamamoto Hitoshi Kobayashi Atsushi Yokoyama OVERVIEW: Hitachi researches and develops control technologies and systems for electric vehicle motors that provide better energy effi ciency and safety. This has included using an EV test vehicle to demonstrate the use of the electric motor in traction control and antilock braking, utilizing the rapid changes in torque made ...

This race is particularly visible in the automotive field. Companies around the globe are vying to build a new, less polluting automobile engine that does not run on gasoline. In the US, for instance, General Motors (GM) spent over US$1 billion on developing an electric car that runs on a hydrogen fuel cell. It originally chose hydrogen fuel as the basis for the engine. Yet mass production of a...

In addition to clean transportation and energy savings, electric vehicles can inherently offer better performance in the field of active safety and dynamic stability control, thanks to the superior fast and accurate control characteristics of electric motors. With the novel wheel status parameter TA for electric vehicles proposed by the authors in an earlier publication, a new TA index (TAI)-ba...

Applying a unique 3-channel RS-485 transceiver displaying many unusual features increases reliability and fault-detection in motor-control applications. Designed specifically for motor shaft encoder applications, the MAX3097 and MAX3098 feature three differential channels to handle optical encoder data, ±15kV ESD protection, increased common mode rejection to -10 and +13.2V, three separate faul...

Electric and hybrid electric vehicles are attractive candidates for sustainable transportation due to its higher efficiency and low emission. The critical choice on the electric motors is its capability of motoring and regenerative braking characteristics. Switched reluctance machines are viable candidate as with proper control and extended constant power range operation replacing the multi-gea...