a rotor position sensor , controlled by {TAIL ~ the position} of {HEAD ~ the rotor} , for generating a rotor position signal  
a rotor position sensor , controlled by { TAIL ~ the position } of { HEAD ~ the rotor } , for generating a rotor position signal
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH