Apparatus and method for detecting the rate of rotation of...

Apparatus for detecting revolution counts of an electric motor o

Apparatus for measuring motor rotation position and speed

Brushless motor speed detecting apparatus for reducing generatio

Circuit arrangement for starting detection of three-phase genera

Electronic velocity measurement device

Fan operating status monitoring system

Fan speed detecting circuit

Method and circuit for determining the velocity of a data detect

Method and device for measuring the rotational speed of a...

Method of and device for contactless measurement of rotary speed

Non-intrusive speed sensing for induction motors

Power system control apparatus for reducing power fluctuations

Process and circuit arrangement for determining the speed of a D

Process and device for detecting revolutions of a rotating eleme

Rate of rotation measurement using back-EMFS associated with win

Speed detector and indicator for DC motors

Speed sensing for the third harmonic stator voltage signal

System and method for determining rate of rotation using brushle

Testing device for an electric generator