Title:
CONTROL OF A BRUSHLESS MOTOR
Document Type and Number:
WIPO Patent Application WO/2014/006368
Kind Code:
A3
Abstract:
A method of controlling a brushless motor comprising sensing a temperature, using the sensed temperature to define a current limit, and sequentially energising and de-energising a winding of the motor, the winding being de-energised in response to current in the winding exceeding the current limit. A lower current limit is then defined for a lower sensed temperature.
Inventors:
GREETHAM STEPHEN (GB)
HAWKER DAVID (GB)
HAWKER DAVID (GB)
Application Number:
PCT/GB2013/051613
Publication Date:
June 19, 2014
Filing Date:
June 20, 2013
Export Citation:
Assignee:
DYSON TECHNOLOGY LTD (GB)
International Classes:
A47L9/28; H02P1/04; H02P29/00; H02P29/02
Foreign References:
| US20100156338A1 | 2010-06-24 | |||
| US20110095717A1 | 2011-04-28 | |||
| FR2977412A1 | 2013-01-04 | |||
| JP2009198139A | 2009-09-03 | |||
| US20050029975A1 | 2005-02-10 | |||
| EP2028759A2 | 2009-02-25 | |||
| EP1677411A1 | 2006-07-05 |
Attorney, Agent or Firm:
LOBBAN, Colin et al. (Intellectual Property DepartmentTetbury Hil, Malmesbury Wiltshire SN16 0RP, GB)
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