Title:
An electric mechanical apparatus and a battery pack
Document Type and Number:
Japanese Patent JP6026908
Kind Code:
B2
Abstract:
A motor-driven appliance includes a battery (3); a motor (2) including permanent magnets (2a) as field magnets; a momentary maximum current upper limit storage unit (8) in which a predetermined momentary maximum current upper limit is stored; a current detection unit (7) that detects a current flowing in the motor (2); a current threshold setting unit (9, 10) that generates a current threshold based on the momentary maximum current upper limit, and outputs the generated current threshold; a current exceedance determination unit (11) that determines whether the current detected by the current detection unit (7) has become equal to or greater than the current threshold, and outputs an interruption signal used to interrupt a current path from the battery (3) to the motor (2) when the detected current has become equal to or greater than the current threshold; and a current flow interruption unit (5, 52) that interrupts the current path when the interruption signal is outputted from the current exceedance determination unit (11).
Inventors:
Hitoshi Suzuki
Application Number:
JP2013022390A
Publication Date:
November 16, 2016
Filing Date:
February 07, 2013
Export Citation:
Assignee:
Makita Corporation
International Classes:
B25F5/00; H01M2/10; H01M10/48; H02K1/27
Domestic Patent References:
| JP2007520180A | ||||
| JP2007131076A | ||||
| JP2011155740A | ||||
| JP2001103788A | ||||
| JP2012191838A | ||||
| JP2005073350A | ||||
| JP2005204365A |
Foreign References:
| WO2013014917A2 |
Attorney, Agent or Firm:
Nagoya International Patent Service Corporation