JP5422749B2 - 電動車両の動力装置 - Google Patents
電動車両の動力装置 Download PDFInfo
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- JP5422749B2 JP5422749B2 JP2012541637A JP2012541637A JP5422749B2 JP 5422749 B2 JP5422749 B2 JP 5422749B2 JP 2012541637 A JP2012541637 A JP 2012541637A JP 2012541637 A JP2012541637 A JP 2012541637A JP 5422749 B2 JP5422749 B2 JP 5422749B2
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Description
図1は、本発明の第1実施形態に係る動力装置20を適用した電動二輪車1を右側から見た側面図である。図1に示すように、電動二輪車1は、前輪2及び後輪3を備えている。前輪2は、フロントフォーク4の下端部に回転可能に支持され、フロントフォーク4は、ステアリングシャフト(図示せず)を介してハンドル5と連結される。ハンドル5は、左右一対のグリップを有し、そのうち右側のグリップは、運転者により加減速要求が入力操作されるアクセルグリップ6である。
図5は、本発明の第2実施形態に係る動力装置120の電気的構成を模式的に示す概念図である。第1実施形態では、複数の電動機21のうち同一相のコイルを三相線40のうちの対応する配線に並列接続しているが、図5に示すように、同一相のコイルを直列に接続することも可能である。つまり、三相線140を成すU相線140U、V相線140V及びW相線140Wの一端を単一の中性点133にて星型結線し、U相線140U上に複数のU相コイル32Uを直列接続し、V相線140V上に複数のV相コイル32Vを直列接続し、W相線140W上に複数のW相コイル32Wを直列接続してもよい。このように電気的構成が変更されても、第1実施形態と同様にして、インバータ装置24と電動機21とを一対多の関係で設けつつ、各電動機21が互いの動作を干渉するのを良好に抑制することができる。
図6は、本発明の第3実施形態に係る動力装置220の電動機の周辺の構造を示す断面図である。図6に示すように、本実施形態に係る動力装置220は、第1電動機21A、第2電動機21B、第3電動機21C及び第4電動機21Dから成る4個の電動機を備え、全ての電動機21が第1実施形態と同様のアウタロータ型SPMモータである。
図8は、本発明の第4実施形態に係る動力装置320の電動機の周辺の構造を示す断面図である。図8に示すように、本実施形態に係る動力装置320は、第1電動機21A及び第2電動機21Bから成る2つの電動機を備え、2つの電動機21A,21Bは第1実施形態と同様のアウタロータ型SPMモータである。第1電動機21A及び第2電動機21Bの各出力軸部31は、1本の共通出力軸361を成している。動力伝達機構322は、この1本の共通出力軸361と、第1実施形態と同様の一次伝動機構63、中間軸64及び二次伝動機構65とを備え、各出力軸部31の後輪3(図1参照)に対する変速比が互いに等しくなっている。
図9は、本発明の第5実施形態に係る動力装置420の電動機の周辺の構造を示す断面図である。図9に示すように、本実施形態に係る動力装置420は、第4実施形態と同様にして、第1電動機21A及び第2電動機21Bから成る2つの電動機を備え、2つの電動機がアウタロータ型SPMモータであり、各出力軸部31が1本の共通出力軸361を成し、各回転子が一体の回転体351を成している。
図10は、本発明の第6実施形態に係る動力装置520の電動機の周辺の構造を示す断面図である。図10に示すように、本実施形態の動力装置520は、第1電動機21A及び第2電動機21Bから成る2つの電動機を備え、これら2つの電動機は第1実施形態と同様にしてアウタロータ型SPMモータである。第1電動機21A及び第2電動機21Bの各出力軸部31は、1本の共通出力軸561を成している。動力伝達機構522は、この1本の共通出力軸561と、第1実施形態と同様の一次伝動機構63、中間軸64及び二次伝動機構65を備えている。本実施形態においても、各出力軸部31の後輪3(図1参照)に対する変速比を互いに等しくすることができる。
図11は、本発明の第7実施形態に係る動力装置620の電動機の周辺の構造を示す断面図である。図11に示すように、本実施形態の動力装置620は、第1電動機21A、第2電動機21B、第3電動機21C及び第4電動機21Dから成る4つの電動機を備え、全ての電動機がアウタロータ型SPMモータである。4つの電動機21A,21B,21C,21Dの各出力軸部31は、1本の共通出力軸661を成している。動力伝達機構622は、この1本の共通出力軸661と、第1実施形態と同様の一次伝動機構63、中間軸64及び二次伝動機構65とを備えている。本実施形態においても、各出力軸部31の後輪(図1参照)に対する変速比を互いに等しくすることができる。
図12は、本発明の第8実施形態に係る動力装置720の電動機21の周辺の構造を示す断面図である。図12に示すように、本実施形態に係る動力装置720は、第1電動機21A及び第2電動機21Bから成る2つの電動機を備え、2つの電動機が第1実施形態と同様のアウタロータ型のSPMモータである。第1電動機21Aの出力軸部31Aは、第2電動機21Bの出力軸部31Bと独立しており、これら出力軸部31A,31Bは互いに平行に延在している。本実施形態においても、1つのインバータ装置24(図3参照)から出力される交流によって2つの電動機21A,21Bを互いに逆方向に回転させることができるように電気回路が設計されている。
3 後輪
12 スイングアーム
16 電動機ケース
20 動力装置
21 電動機
22 動力伝達機構
23 蓄電装置
24 インバータ装置
25 制御装置
31 出力軸部
32 三相コイル
34 バッテリ
51 回転子
55 永久磁石
56 固定子
61 共通出力軸
62 スプライン溝
63 一次伝動機構
64 中間軸
65 二次伝動機構
71 モータハウジング
72 モータカバー
75 モータ収容部
76 機構収容部
77 軸収容部
78 駆動側収容部
79 従動側収容部
Claims (9)
- 直流を蓄電する蓄電装置と、
前記蓄電装置に蓄電される直流から交流を生成するインバータ装置と、
前記インバータ装置により生成された交流の給電を受けて走行動力を発生する複数の電動機と、
前記複数の電動機の各出力軸部の回転を駆動輪に伝達する動力伝達機構と、を備え、
前記動力伝達機構が、前記各出力軸部が前記駆動輪の車軸に対し互いに同一の変速比で回転するように前記各出力軸部を互いに機械的に連結しており、
前記複数の電動機が、単一の前記インバータ装置と接続され、前記単一のインバータ装置が生成する交流の給電を受けるように構成されている、電動車両の動力装置。 - 前記複数の電動機各々の回転子及び固定子の形状が同一形状に形成される、請求項1に記載の電動車両の動力装置。
- 前記複数の電動機の回転慣性が、互いに同じに設定されている、請求項1又は2に記載の電動車両の動力装置。
- 前記複数の電動機のうち少なくとも2つの電動機の各出力軸部が、1本の共通出力軸を成しており、
前記動力伝達機構が、前記共通出力軸の回転を前記駆動輪の前記車軸に伝達するよう構成されている、請求項2又は3に記載の電動車両の動力装置。 - 前記複数の電動機は、互いに同数相の多相巻線を有する多相交流電動機であり、
前記単一のインバータ装置は、前記多相巻線の相数に応じた多相交流を出力するための多相配線と接続され、
前記複数の電動機の同一相の巻線が前記多相配線に並列接続されている、請求項4に記載の電動車両の動力装置。 - 前記動力伝達機構に設けられ、前記共通出力軸と前記駆動輪との間で伝達される動力の急変を緩衝する緩衝手段を備える、請求項4又は5に記載の電動車両の動力装置。
- 前記電動車両が電動二輪車であって、
前記動力伝達機構が、前記共通出力軸の回転が伝達される中間軸と、前記中間軸の回転を前記駆動輪の前記車軸に伝達する二次伝動機構と、を有し、
前記二次伝動機構の二次駆動要素が、前記共通出力軸から動力が取り出される動力取出位置に対して車幅方向一方側に配置され、前記複数の電動機が、前記動力取出位置に対して車幅方向他方側に配置される、請求項1〜4及び6のいずれか1項に記載の電動車両の動力装置。 - 複数の前記共通出力軸が互いに平行に延在し、
前記動力伝達機構が、前記複数の共通出力軸と平行に延びる中間軸と、前記複数の共通出力軸の回転を互いに同一の変速比で前記中間軸に伝達する一次伝達機構と、を有する、請求項2乃至7のいずれか1項に記載の電動車両の動力装置。 - 前記各電動機が、
前記出力軸部上に固定されて前記出力軸部の外周面から半径方向に延びるフランジ部、及び前記フランジ部の外縁部から軸線方向に延びて前記出力軸部の外周面から半径方向に間隔をおいて配置される周壁部を有し、前記出力軸部とともに回転する回転子と、
前記回転子の前記周壁部の内周面に貼り合わされた永久磁石と、
円筒状に形成され、前記永久磁石と前記出力軸部の外周面との間に形成された円環状空間内に静置される固定子と、
前記固定子の外周面に固定され、前記永久磁石と半径方向に対向するコイルと、を備える、請求項1乃至8のいずれか1項に記載の電動車両の動力装置。
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