|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||324/161 ; 324/166 ; 361/240|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 12 인용 특허 : 2|
A motor speed detector employs a magnetic sensor for detecting rotational movement of rotor armature segments of the motor and for producing real tachometer pulses in response to such movement. False tachometer pulses produced by extraneous non-rotor motor components are discriminated against to produce a signal representative of actual motor rotational speed.
A method for detecting rotational speed of a motor, comprising the step of: (a) producing a first signal comprising real tachometer pulses responsive to revolution of rotor armature segments of said motor and false tachometer pulses responsive to extraneous non-rotor components of said motor, both said real and false tachometer pulses increasing in amplitude with increasing rotational speed of said motor, (b) producing a second signal with amplitude representative of the maximum amplitude of said real tachometer pulses, (c) producing a third signal with ...