| 发明名称 | Control of an electrical machine | ||
| 摘要 | A method of controlling an electrical machine that includes exciting a phase winding with a supply voltage, and freewheeling the phase winding when current in the phase winding exceeds a threshold. The threshold is then adjusted in response to changes in the supply voltage and/or the speed of the electrical machine. Additionally, a control system that implements the method and an electrical machine comprising the control system are described. | ||
| 申请公布号 | US8841876(B2) | 申请公布日期 | 2014.09.23 |
| 申请号 | US201113250302 | 申请日期 | 2011.09.30 |
| 申请人 | Dyson Technology Limited | 发明人 | Leaver Mark Edward;Chen Yu;Celik Tuncay |
| 分类号 | H02P1/46;H02P6/00;H02P6/14;H02P23/00 | 主分类号 | H02P1/46 |
| 代理机构 | Morrison & Foerster LLP | 代理人 | Morrison & Foerster LLP |
| 主权项 | 1. A method of controlling an electrical machine, the method comprising: exciting a phase winding of the electrical machine with a supply voltage; freewheeling the phase winding when current in the phase winding exceeds a threshold; adjusting the threshold in response to changes in at least one of the supply voltage and the speed of the electrical machine, and increasing the threshold in response to at least one of a decrease in the supply voltage and an increase in the speed of the electrical machine. | ||
| 地址 | Malmesbury GB | ||