基本信息:
- 专利标题： ELECTRIC WORKING MACHINE
- 申请号：US16353157 申请日：2019-03-14
- 公开(公告)号：US20190305699A1 公开(公告)日：2019-10-03
- 发明人： Masumi NISHIMURA , Yoshiteru ITO
- 申请人： MAKITA CORPORATION
- 申请人地址： JP Anjo-shi
- 专利权人： MAKITA CORPORATION
- 当前专利权人： MAKITA CORPORATION
- 当前专利权人地址： JP Anjo-shi
- 优先权： JP2018-068618 20180330
- 主分类号： H02P6/15
- IPC分类号： H02P6/15 ; H02P6/18 ; H02P6/28
摘要：
An electric working machine includes an inverter and a controller. The controller switches a current conduction pattern via the inverter and performs a PWM control of a conduction current to a brushless motor. The controller includes switching patterns as the current conduction pattern switched for every commutation timing. The switching patterns include different on and off states for different switching elements. The controller sequentially switches a switching pattern synchronously with a period of the PWM control, detects a rotational position of a brushless motor from a magnitude relation between inductances of the brushless motor produced by switching the switching pattern, and sets the commutation timing.
公开/授权文献:
- US10833612B2 Electric working machine 公开/授权日：2020-11-10