JP5740593B2 - 電磁ブレーキ付作業車両 - Google Patents
電磁ブレーキ付作業車両 Download PDFInfo
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- JP5740593B2 JP5740593B2 JP2011153763A JP2011153763A JP5740593B2 JP 5740593 B2 JP5740593 B2 JP 5740593B2 JP 2011153763 A JP2011153763 A JP 2011153763A JP 2011153763 A JP2011153763 A JP 2011153763A JP 5740593 B2 JP5740593 B2 JP 5740593B2
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- B60L15/2009—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed for braking
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- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Regulating Braking Force (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
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Description
以下に図面を用いて本発明に係る実施の形態につき詳細に説明する。なお、以下では、電磁ブレーキ付作業車両として、作業機として芝刈り機を備える芝刈車両の場合を説明するが、本発明に係る電磁ブレーキ付作業車両は、これに限定するものではない。例えば作業機として、地面に対する作業、すなわち対地作業を行う作業機、例えば、耕うん機、苗植作業機、地ならし作業機、穴掘り作業機等を備える車両であってもよい。
図7、図8は、本発明の第2の実施の形態を示している。本実施の形態の芝刈車両において、ECU50(図3)の一部を除く構成は、上記の第1の実施の形態と同様である。このため、上記の図1から図4、図6の要素と同等の要素、または対応する要素には、同一の符号を付して、以下、図1から図4、図6を参照しつつ説明する。
Claims (4)
- 左右の走行用モータによりそれぞれ走行駆動される駆動輪である左右車輪と、
対地作業を行うために駆動される作業機と、
前記左右車輪に対応してそれぞれ設けられる左右の電磁ブレーキであって、それぞれ電源から通電されることにより前記左右車輪の制動解除動作を行い、前記電源からの通電が遮断されることにより前記左右車輪の制動動作を行う前記左右の電磁ブレーキと、
制動解除指令が取得された場合に、前記電源と前記左右の電磁ブレーキとを電気的に接続し、前記電源から前記左右の電磁ブレーキに通電させる、前記左右の電磁ブレーキで共通の共通ブレーキ解除手段と、
前記共通ブレーキ解除手段を制御する制御部とを備え、
前記制御部は、
前記左右の電磁ブレーキの通電状態を比較し、比較した通電状態の差が許容上限を超える場合に、前記電源と前記左右の電磁ブレーキとの電気的接続を遮断して前記左右車輪を制動させるように前記共通ブレーキ解除手段を制御することを特徴とする電磁ブレーキ付作業車両。 - 請求項1に記載の電磁ブレーキ付作業車両において、
前記制御部は、
前記左右の電磁ブレーキの通電状態を比較する比較部と、
前記比較部で比較した通電状態の差が許容上限を超える場合に、前記電源と前記左右の電磁ブレーキとの電気的接続を遮断して前記左右車輪を制動させるように前記共通ブレーキ解除手段を制御する共通解除制御部とを含むことを特徴とする電磁ブレーキ付作業車両。 - 請求項2に記載の電磁ブレーキ付作業車両において、
前記左右の電磁ブレーキに対する通電量をそれぞれ検知する左ブレーキ電流センサ及び右ブレーキ電流センサを備え、
前記比較部は、前記各電流センサの検知信号から前記左右の電磁ブレーキの通電状態を比較することを特徴とする電磁ブレーキ付作業車両。 - 請求項2または請求項3に記載の電磁ブレーキ付作業車両において、
前記制御部は、前記左右の電磁ブレーキに対する通電状態である、左右ブレーキ通電電流の時間的変化を記憶する記憶部を含み、
前記比較部は、記憶部で記憶された前記左右ブレーキ通電電流の時間的変化を比較することを特徴とする電磁ブレーキ付作業車両。
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