SYSTÈME POUR ADAPTER LE FONCTIONNEMENT RÉSONANT D'UN APPAREIL DE SOINS PERSONNELS PENDANT LA DURÉE DE VIE DE CELUI-CI

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专利权人:

Koninklijke Philips N.V.

发明人:

申请号：

EP07826937.0

公开号：

EP2088959B1

申请日:

2007.10.31

申请国别(地区):

EP

年份:

2017

代理人:

摘要：

The adapting system for a resonant drive appliance includes a circuit for measuring the back EMF induced in the stator coil of the motor following turn-off of the appliance. The frequency of the back EMF signal is determined from the zero crossings of the EMF signal. The determined frequency is then compared with a running average of previous frequency determinations, and the drive frequency of the appliance is adjusted if the difference between the compared frequencies is greater than a threshold value, e.g. 1 Hz.

来源网站：

中国工程科技知识中心

来源网址：

http://www.ckcest.cn/home/