Snr Roulements

Achim Friz

Christophe Nicot

Pascal Desbiolles

The invention relates to an electronically commutated motor ( ) comprising P phases and N pairs of poles, in which a circular multipole encoder ( ) is associated with the rotating ring ( ) of an anti-friction bearing ( ), said encoder ( ) comprising a main multipole track ( ) and a multipole commutation track ( ) comprising 2*P*N singularities ( ) equidistributed angularly and a control device comprising a fixed sensor ( ) capable of delivering square digital signals A, B in quadrature and a digital signal C in the form of 2*P*N pulses per revolution of the encoder ( ), a circuit for commutating ( ) the currents in the phase windings of the motor ( ) and a control circuit ( ) for the commutation circuit ( ).

Pulse-controlled electronically commutated motor

The invention relates to an electric power-assisted steering system making it possible to apply an assist torque for the angular displacement of the wheels of a vehicle, said torque being applied by an electronically commutated motor ( ) comprising P phases and N pairs of poles, said system also comprising a device for controlling the motor ( ) comprising a circular multipole encoder ( ) comprising a main multipole track ( ) and a multipole commutation track ( ) comprising magnetic singularities ( ) equidistributed angularly, a fixed sensor ( ) capable of delivering square digital signals A, B in quadrature, and a signal C in the form of 2*P*N pulses per revolution of the rotor ( ), a circuit for commutating ( ) the currents in the phase windings of the motor ( ) and a control circuit ( ) for the commutation circuit ( ).

Growing community of inventors

Seynod, France

Achim Friz