| 发明名称 |
METHOD AND APPARATUS FOR AN EMERGENCY LOWERING KIT |
| 摘要 |
A method and apparatus are disclosed for lowering a load on a direct current hoist motor during an electrical power interruption, the method including but not limited to determining in a crane processor that the electrical power interruption has occurred; and providing a brake assist current to shunt field on the direct current hoist motor to produce a counter torque in the hoist motor. |
| 申请公布号 |
US2015130375(A1) |
申请公布日期 |
2015.05.14 |
| 申请号 |
US201414444717 |
申请日期 |
2014.07.28 |
| 申请人 |
Electronic Power Design, Inc. |
发明人 |
Sutherland Charles |
| 分类号 |
B66C13/22;H02P3/12;B66C15/00 |
主分类号 |
B66C13/22 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A method for lowering a load on a direct current hoist motor during an electrical power interruption, the method comprising:
determining in a crane processor that the electrical power interruption has occurred; and providing a brake assist current to shunt field on the direct current hoist motor to produce a counter torque in the hoist motor. |
| 地址 |
Houston TX US |
