Unnecessary vibration detection apparatus and driving control apparatus of vibration type actuator

Patent metadata

Field	Value
Publication number	US-9065359-B2
Application number	US-201313795702-A
Country	US
Kind code	B2
Filing date	Mar 12, 2013
Priority date	Mar 19, 2012
Publication date	Jun 23, 2015
Grant date	Jun 23, 2015

Abstract

An unnecessary vibration detection apparatus of a vibration type actuator includes an AC voltage generation unit that generates a plurality of AC voltages having a driving frequency; a vibration detection unit that outputs a vibration detection signal of the vibration type actuator; and an unnecessary vibration detection unit that detects an unnecessary vibration component by generating a signal for cancelling the vibration component of the driving frequency in the vibration detection signal by controlling amplitudes of a plurality of AC signals which are used for generating the plurality of AC voltages.

First claim

What is claimed is:

1. An unnecessary vibration detection apparatus of a vibration type actuator, comprising:
an AC voltage generation unit that generates a plurality of AC voltages having a driving frequency;
a vibration detection unit that outputs a vibration detection signal of the vibration type actuator; and
an unnecessary vibration detection unit that detects an unnecessary vibration component from the vibration detection signal,
wherein the unnecessary vibration detec…

Assignees

• Canon Kk

Inventors

• Iwasa Takeshi
• Kataoka Kenichi

Classifications

• H02N2/142 Primary

  Electricity · mapped topic