Title:
【発明の名称】キックバック状態検出方法及び該方法により制御される電動工具
Document Type and Number:
Japanese Patent JP2852716
Kind Code:
B2
Abstract:
A microprocessor based motor controller which provides open loop speed control at low conduction angles (area 46), closed loop speed control at high conduction angles (area 50), and a smooth transition between open loop and closed loop zones (area 48). In open loop, the conduction angle is selected and speed is permitted to vary with applied load. In closed loop, the motor speed is selected and held constant, substantially irrespective of load. In the transition zone, the motor is operated in a hybrid open loop, closed loop fashion. Anti-kickback protection is also provided based on a percentage change in the motor's rotational period.
Inventors:
ROBAATO BURADASU
Application Number:
JP29756393A
Publication Date:
February 03, 1999
Filing Date:
November 04, 1993
Export Citation:
Assignee:
BURATSUKU ANDO DETSUKAA INC
International Classes:
B23Q17/09; H02P23/00; H02P25/14; B23Q15/00; (IPC1-7): B23Q17/09; B23Q15/00; H02P7/638
Domestic Patent References:
| JP62247784A | ||||
| JP512464Y2 |
Attorney, Agent or Firm:
Tadashi Hagino (2 outside)