Title:
ELECTRIC TOOL
Document Type and Number:
WIPO Patent Application WO/2013/136672
Kind Code:
A1
Abstract:
An electric tool (1) is provided with a sensor unit (S) for detecting the rotational position of a brushless motor (3), a drive circuit (15) for supplying power to the brushless motor (3), and a control unit (14) for controlling the drive circuit (15). When it was determined that the current positional information based on the position signal of the sensor (S) is abnormal, the control unit (14) carries out an abnormality stop for stopping the drive power to the motor (3) (S30). When the brushless motor (3) is selected to be driven after the abnormality stop was carried out (S31), the control unit (14) reactivates the brushless motor (3) by controlling the switching elements (16 to 21) of the drive circuit (15) at a duty cycle that is lower than the duty cycle before stopping the drive power.
Inventors:
MIYAZAKI HIROSHI
IKEDA MASAKI
IKEDA MASAKI
Application Number:
PCT/JP2013/000946
Publication Date:
September 19, 2013
Filing Date:
February 20, 2013
Export Citation:
Assignee:
PANASONIC CORP (JP)
International Classes:
B25F5/00
Foreign References:
| JP2011011313A | 2011-01-20 | |||
| JP2008023645A | 2008-02-07 | |||
| JP2009165280A | 2009-07-23 | |||
| JP2010259131A | 2010-11-11 | |||
| JP2008005592A | 2008-01-10 | |||
| JP2011011313A | 2011-01-20 |
Other References:
See also references of EP 2826602A4
Attorney, Agent or Firm:
ONDA, Hironori et al. (JP)
Hironori Onda (JP)
Hironori Onda (JP)
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