公开(公告)号：EP0631685A1

公开(公告)日：1995-01-04

申请号：EP92915176.0

申请日：1992-03-19

Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.

Inventor： SMITH, Dexter ,  SCHWARTZ, Joseph ,  ZIEGLER, Eldon, W., Jr.

IPC: B60L9 ,  G10K11 ,  H02K5 ,  H02K11 ,  H02K23 ,  H02P7

CPC classification number: H02K5/24 ,  G10K11/178 ,  G10K2210/10 ,  G10K2210/121 ,  G10K2210/123 ,  G10K2210/3013 ,  G10K2210/3045 ,  G10K2210/3212 ,  G10K2210/501 ,  H02K11/048 ,  H02K11/20 ,  H02K23/66 ,  H02P7/298

Abstract: An active attenuation system for a DC motor (11) which yields global vibration reduction of slot or other motor induced tonals at the plate on which the motor is mounted without modifying the construction of the motor. The system comprises one or more vibration sensors (13), a signal synchronized to the slot rate or other motor induced tonal rate, an electronic adaptive controller (12) and the means to inject the control signal into the motor field and/or armature current.