| 发明名称 |
Electric lawn tractor roll away prevention system |
| 摘要 |
An electric lawn tractor roll away prevention system includes a brushless DC electric motor powering a traction drive wheel on the electric lawn tractor. The motor is connected to phase wires and provides a back EMF voltage on the phase wires if the electric lawn tractor rolls and turns the traction drive wheel without electric power from the motor. A three phase inverter rectifies the back EMF voltage, turns on the traction controller if the rectified voltage reaches a pre-specified threshold, and applies a voltage to the phase wires to reduce the speed of the electric lawn tractor by regenerative braking. |
| 申请公布号 |
US8983691(B2) |
申请公布日期 |
2015.03.17 |
| 申请号 |
US201213568492 |
申请日期 |
2012.08.07 |
| 申请人 |
Deere & Company |
发明人 |
Amundson Roger K.;Kallara Jacob C.;Cross Patrick W.;Harris, III Troy W. |
| 分类号 |
B60L9/00;B60L11/00;G05D1/00;G05D3/00;G06F7/00;G06F17/00;B60W20/00;B60W10/08 |
主分类号 |
B60L9/00 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. An electric lawn tractor roll away prevention system, comprising:
a brushless DC electric motor mounted to a traction drive wheel on the electric lawn tractor, the motor connected to phase wires and providing a back electromotive force voltage on the phase wires when the electric lawn tractor is in a parked position and then rolls and turns the traction drive wheel without electric power from the motor; and a traction controller connected to the phase wires and having a three phase inverter that rectifies the back electromotive force voltage, the traction controller being powered off and turning on when the rectified voltage reaches a pre-specified threshold, and applies a voltage from a battery pack to the phase wires to reduce the speed of the electric lawn tractor by regenerative braking. |
| 地址 |
Moline IL US |
