Valeo Equipements Electriques Moteur

Valeo Equipments Electriques Moteur

Sidath Diao

Zaatar Makni

Demba Diallo

The method according to the invention enables the diagnosis () of phase current sensor defects in a system for controlling a synchronous rotary electrical machine of a motor vehicle. According to the invention, the method takes into account the differences (&#xee;d, lq) between measurements provided () by the sensors, and nominal values of the phase currents (ia, ib, ic) in order to diagnose defects. The differences are calculated () in a rotating Park reference frame () and are separate from an electromechanical model of the machine. The method detects sensor defects if the differences are substantially non-zero () and an offset sensor defect if a residual pulsation (&#x3c9; res) of the differences is substantially equal to a measured speed (w) of the control system.

Method and device for diagnosing phase current sensor defects in control system of synchronous rotary electric machine of motor vehicle

According to the method of the invention, the estimation of the angular position is obtained by calculating at least one first estimator as solution of a differential algebraic equation whose coefficients depend on electric parameters of the rotating electric machine comprising first and second inductances of a stator respectively along a direct axis and a quadrature axis with respect to a magnetic flux produced by the rotor of the machine, a resistance of a phase winding and the magnetic flux produced by the rotor. The coefficients also depend on a reference voltage of a vector pulse width modulation () applied to the stator of the machine, on phase currents and on first derivatives with respect to time of these phase currents. The estimation of the speed of rotation is obtained by calculating a second estimator obtained by a calculation of first derivative of the first estimator with respect to time.

Method for estimating the angular position of the rotor of a polyphase rotary electrical machine, and application to the control of a polyphase inverter for such a machine

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Saint Maur des Fosses, France

Sidath Diao