|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||361/239 ; 361/240 ; 361/263 ; 361/287|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 11 인용 특허 : 3|
A brushless tachometer is disclosed which provides a DC output voltage which is a direct function of an instrumented shaft\s rotational velocity. The DC voltage is bi-directional, changing sign when the shafts direction of rotation is reversed. The disclosed tachometer preferably utilizes a brushless printed circuit resolver having a large number of poles. The sine and cosine outputs from the resolver are fed to a phase shifting circuit which provides two output signals whose frequencies are related to the speed of rotation of the shaft being instrumente...
A brushless tachometer for providing a DC output voltage indicative of the speed of a rotatable shaft comprising: a multi-pole brushless resolver connected to the shaft to be instrumented for providing modulated sine and cosine position indications; an oscillator providing a modulating input signal to said resolver; a side band splitting circuit connected to receive the modulated sine and cosine position indications and providing two output signals whose frequencies difference is representative of shaft speed; frequency to voltage converting means connec...