Patent ID: 7923952

Claim:
A device for controlling a polyphase rotary electrical machine, said machine comprising a stator, a rotor, a first sensor producing a first sensor signal (U; V; W) representing a position of the rotor with respect to the stator and a second sensor producing a second sensor signal (U; V; W) representing the position and offset in phase with respect to the first sensor signal; said control device producing at least one digital control signal (U′, V′, W′) corresponding to one of said first and second sensor signals (U, V, W) with a required phase lead δ with respect thereto; said control device comprising means (K, R) including at least one controlled switching element (K 0 , K 1 , K 2 , K 3 ) and provided to receive: a the first sensor signal (U; V; W), and the second sensor signal (V; W; U); said means (K, R) provided for combining the first and second sensor signals into a combined signal (S u ; S v ; S w ), said at least one controlled switching element (K 0 , K 1 , K 2 , K 3 ) taking at least two states, the combined signal (S u ; S v ; S w ) being a function of a state of said at least one controlled switching element and making it possible to control said polyphase rotary electrical machine.