公开(公告)号：US10903716B2

公开(公告)日：2021-01-26

申请号：US16135490

申请日：2018-09-19

Applicant: MAKITA CORPORATION

Inventor： Masaki Kamada ,  Fujio Nakano

IPC: H02K5/24 ,  H02K7/14 ,  H02K11/40 ,  H02K5/22 ,  H05K1/18 ,  B25F5/02 ,  B25F5/00 ,  H02K11/02 ,  H02K11/026 ,  H02K5/14

Abstract: An electric working machine includes a motor, a circuit board having capacitors and choke coils for noise reduction, and a fixing tool for fixing the circuit board to a portion of a case of the motor including motor terminals for power feed. The circuit board includes input terminal members to receive an externally supplied driving power, and a ground connection member electrically coupled to the portion of the case. The capacitors couple the input terminal members to the ground connection member. The choke coils couple the input terminal members to the motor terminals. The ground connection member is arranged in a certain area of the circuit board, which is one of areas on the circuit board defined by dividing the circuit board with a straight line crossing a rotational shaft and is an area where the input terminal members are located. The capacitors are mounted in the certain area.