成果報告書詳細
管理番号20110000000507
タイトル*平成22年度中間年報 次世代自動車用高性能蓄電システム技術開発 要素技術開発 脱レアアースを目指す自動車用モータの研究開発1
公開日2012/6/27
報告書年度2010 - 2010
委託先名国立大学法人名古屋工業大学
プロジェクト番号P07001
部署名スマートコミュニティ部
和文要約1. 研究開発の内容及び成果等
本年度の研究開発内容は,以下の2つである。
I. 平成23年度末の設定開発目標である最大出力123[kW],最大トルク140[Nm]を最大出力密度5.3[kW/kg]で実現するハイブリッド界磁モータの最適電磁構造設計
II. 平成20 ? 21 年度で設計した実スケールハイブリッド界磁モータ( トルク密度4.9N⋅m/kg、出力密度3.3kW/kg)の試作と実性能試験評価
1.1 最大出力密度5.3kW/kg のハイブリッド界磁モータの最適電磁構造設計
1期目(平成20?21 年度)の成果に対し, 減速比6:1 のリダクションギアの採用を前提に,最高回転数を20,000r/min から30,000r/min へ引き上げて高速化し,最大トルク縮減(210Nm から140Nm)によるモータ体格の小型化を図り,比較対象従来モータと同一必要車軸トルクを維持したまま,モータ総重量を23kg 以下とする最適電磁構造設計を目指した。ここで,高速化に際し,インバータのスイッチング周波数の抑制に配慮して,20 極から10 極へと極数低減を拘束条件として採用した。
英文要約Title: Development of high-performance battery systems for next-generation vehicles/Elemental technology development/Research and development of electric motors employing non- or less-rare-earth magnet for vehicle propulsion/Research and development of hybrid excitation motor using SMC core (FY2008-FY2011) FY2010 Annual Report

In this year, we have worked on researches and developments of following two subjects: (1) Electromagnetic design of hybrid excitation motor optimized as one with the maximum power density of 5.3kW/kg under the maximum torque and power operation of 140Nm and 123kW and, (2) Trial manufacturing and experimental tests of full-sized hybrid excitation motor with the maximum torque and power densities of 4.9Nm/kg and 3.3kW/kg. For the subject (1), the maximum rotational speed of the motor to be designed was elevated from 20,000r/min to 30,000r/min under an assumption that a reduction gear with the ratio of 6 to 1 was employed. This enabled to reduce the motor weight as well as the motor size while keeping the necessary axle torque for a target vehicle same. Taking into account of restriction of maximum PWM frequency of inverter, the pole number of the motor to be designed was set to ten. Optimum electromagnetic design of the motor was examined by which the motor weight reduction being less than 23kg should be achieved. The maximum torque of the designed machine realized 107% maximum torque with respect to the required one, but the poor power factor degraded the maximum power by 72.5%. Some kinds of countermeasures on the basis of the primary design results were introduced and examined. As a result, we had a good prospect that the optimally designed hybrid excitation motor could be a viable machine with the maximum power density of 5.3kW/kg. For the subject (2), electromagnetic and stress analyses of the full-sized hybrid excitation motor were conducted to check the mechanical strength of SMC field pole cores from a viewpoint of doing experimental tests safely under high torque and speed operation. Consequently, analytical results showed that the maximum pressure of convex part of the SMC field pole core under the maximum power condition the allowable pressure of SMC core. Some kinds of countermeasures on the basis of the analytical results were introduced and examined. As a result, we had a good prospect that the designed full-sized hybrid excitation motor could be mechanically tolerable for tribally manufacturing and doing necessary experimental tests.
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