Title:
ROTATION CONTROLLER OF BRUSHLESS MOTOR FOR DENTAL POLISHING APPARATUS
Document Type and Number:
Japanese Patent JP3243068
Kind Code:
B2
Abstract:
PURPOSE: To eliminate starting impact and vibration at the time of abrupt change of r.p.m. through the use of a simple and inexpensive constitution.
CONSTITUTION: When an actual rotation speed signal Sfm is larger than a target rotational speed signal Sfmp, the brake control means 87 in a rotation controller 80 for a brushless motor M delivers a brake control signal corresponding to the difference ΔSfm to a rotation drive means 81 in order to decelerates the motor M. In order to decelerate the actual rotational speed (fm) at a predetermined rate to a target rotational speed fmp, an intermittent discharge control signal Sc2 is delivered as a brake control signal from the brake control means 87.
Inventors:
Hirokazu Yashiro
Mutsumi Kondo
Mutsumi Kondo
Application Number:
JP17455493A
Publication Date:
January 07, 2002
Filing Date:
July 14, 1993
Export Citation:
Assignee:
IBIDEN Co., Ltd.
International Classes:
A61C1/02; A61C1/06; H02P6/06; H02P6/08; H02P6/17; (IPC1-7): H02P6/20; A61C1/02; A61C1/06
Domestic Patent References:
| JP378490A | ||||
| JP63206191A | ||||
| JP3203060A | ||||
| JP5843194A | ||||
| JP6139892A | ||||
| JP4222489A | ||||
| JP59113780A | ||||
| JP487594A | ||||
| JP4104812U | ||||
| JP5220722B1 |
Attorney, Agent or Firm:
Hironobu Onda