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Featured researches published by Hiroyasu Kudo.


Archive | 2013

A Novel Concept of High Voltage Auxiliaries and its Feasibility Study on Blower Motors

Satoshi Shiraki; Hiroyasu Kudo; Masakazu Tago; Akira Yamada; Shigeki Takahashi; Atsuyuki Hiruma

Hybrid/Electric Vehicles are expected to be one of the solutions for energy and environmental problems. Up to Now, low power automotive electronics have operated under a battery voltage of 12 V and a large current of more than 10 A. Because of this high current, the power electronic circuits cause substantial losses of power through wire harnesses, a DC/DC converter, semiconductors, and so on. In this paper, we have proposed a novel concept of high voltage auxiliaries, which replaces the 12 V loads with the high voltage loads driven directly by the high voltage battery. It is assured that the power efficiency of the high voltage test system is as high as 94 %, which is at least 10 % higher than that of conventional 12 V blower motor systems.


Archive | 2010

FIVE-PHASE MOTOR WITH IMPROVED STATOR STRUCTURE

Masayuki Nashiki; Naoki Tanaka; Hiroyasu Kudo


Archive | 2008

Method and apparatus for manufacturing laminated core and the laminated core

Naoki Tanaka; Masayuki Nashiki; Hiroyasu Kudo


Archive | 2006

Fuel cell system ensuring stability of operation

Hiroyasu Kudo


Archive | 2011

Current sensor, inverter circuit, and semiconductor device having the same

Satoshi Shiraki; Norihito Tokura; Shigeki Takahashi; Masahiro Yamamoto; Akira Yamada; Hiroyasu Kudo; Youichi Ashida; Akio Nakagawa


Archive | 2007

Method and apparatus for manufacturing laminated core

Hiroyasu Kudo; Masayuki Nashiki; Naoki Tanaka; 工藤 弘康; 政行 梨木; 直樹 田中


Archive | 2012

Insulation failure diagnosis apparatus and method of diagnosing insulation failure

Masakazu Tago; Atsuyuki Hiruma; Hiroyasu Kudo


Archive | 2010

CURRENT DETECTION CIRCUIT, AND SEMICONDUCTOR DEVICE PROVIDED WITH INVERTER CIRCUIT HAVING THE SAME

Hiroyasu Kudo; Satoshi Shiraki; Shigeki Takahashi; Norihito Tokura; Akira Yamada; Masahiro Yamamoto; 昌弘 山本; 山田 明; 工藤 弘康; 規仁 戸倉; 白木 聡; 茂樹 高橋


Archive | 2006

Fuel cell, fuel cell stack, and fuel cell system

Tetsuro Kikuchi; Hiroyuki Usami; Hiroyasu Kudo; Yuichi Sakajo


Archive | 2007

FOUR-PHASE ROTARY ELECTRIC MACHINE

Hiroyasu Kudo; Masayuki Nashiki; Naoki Tanaka; 工藤 弘康; 政行 梨木; 直樹 田中

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