An angular velocity sensor for a rotor (2) and method of determining angular velocity in which the position at which event generation means (4) pass sensing means (5) is determined using information from the times at which the event generation means (4) passed the sensing means (5) during at least one previous complete revolution to of the rotor (2). Especially applicable to use of Hall Effect Sensors to detect commutation points of a brushless permanent magnet rotor in an Electric Power Assisted Steering apparatus.
申请公布号
WO03054556(A1)
申请公布日期
2003.07.03
申请号
WO2002GB05587
申请日期
2002.12.09
申请人
LUCAS INDUSTRIES LIMITED;SCOTSON, PETER, GEOFFREY;WILLIAMS, CONNEL;DIXON, CHRISTOPHER, DAVID
发明人
SCOTSON, PETER, GEOFFREY;WILLIAMS, CONNEL;DIXON, CHRISTOPHER, DAVID