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Title:
単相直巻整流子電動機の駆動装置
Document Type and Number:
Japanese Patent JP5777924
Kind Code:
B2
Abstract:
A drive device (1) of the present invention includes a pair of drive switches (12, 14), a first diode (D1), a switching element (16), a current detection unit (R1, 18), a capacitor (C1), a second diode (D2), and a current control unit (20). The first diode (D1), the switching element (16), and the current detection unit (R1, 18) are arranged, in this order from one end of an armature (4) in a motor (2), on a braking current path that is formed of the armature (4) and a field winding (6, 8) in the motor (2) when the pair of drive switches (12, 14) is in a brake position. The second diode (D2) is adapted to keep allowing a braking current to flow through the field winding (6, 8) when the switching element (16) is in an off-state by directly connecting a partial path between the switching element (16) and the current detection unit (R1, 18) on the braking current path and the other end of the armature (4).

Inventors:
須田 秀和
藤波 克人
Application Number:
JP2011083721A
Publication Date:
September 09, 2015
Filing Date:
April 05, 2011
Export Citation:
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Assignee:
株式会社マキタ
International Classes:
H02P25/10; H02P3/12
Domestic Patent References:
JP6198578A
JP9312904A
JP62107597U
JP4368492A
Attorney, Agent or Firm:
名古屋国際特許業務法人