Title:
電動作業機器
Document Type and Number:
Japanese Patent JP6562798
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent a high current from running through a switching element for driving and drive a motor even if the switching element for driving is switched to an ON state when a switching element for braking has a short circuit fault.SOLUTION: The electrically-driven working apparatus includes: a motor 30 operating by receiving power supply from a power source 7; a switching element Q3 generating a braking force at the motor at an ON state; and a breaking element 32 connected in series to the switching element. The breaking element shuts down a connection path to the switching element when an electric current or a temperature running through or in the connection path rises to a specified value or higher, and a series circuit of the switching element and the breaking element is in parallel to the motor.SELECTED DRAWING: Figure 2
Inventors:
Akihiro Nakamoto
Application Number:
JP2015188010A
Publication Date:
August 21, 2019
Filing Date:
September 25, 2015
Export Citation:
Assignee:
Makita Corporation
International Classes:
H02P3/24; B25C1/06; B25C7/00; B25F5/00; H02P7/28
Domestic Patent References:
| JP2012101302A | ||||
| JP52096221U | ||||
| JP2006271035A | ||||
| JP2011062035A | ||||
| JP54038112A | ||||
| JP58159678A |
Attorney, Agent or Firm:
Nagoya International Patent Service Corporation