Abstract:
The excitation circuit according to the invention controls an excitation current (lexc) in an excitation winding (2) of an alternator by means of an on-board network voltage control loop (Vbat+, 3) of the vehicle, and comprises a first MOS power transistor (9) which is connected between a first positive supply terminal Vbat+ (6), and a first excitation terminal (7), and is controlled by the control loop by means of a first control circuit (10), a second MOS power transistor (11), which is connected between the first excitation terminal and a second excitation terminal (8) which is connected to a ground terminal (5) and acts as a free wheel diode, whilst being controlled by means of a second control circuit (12). According to the invention, the circuit additionally comprises a control loop (15) of a drain-source voltage (Vds) of the second transistor.
Abstract:
Regulating loop for a digital regulator of an excitation rotating electric machine is suitable for operation as a generator delivering an output voltage tailored by an excitation current. The digital regulator comprises means of control of the excitation current and the regulating loop comprises, at input, a means of measurement by sampling the output voltage generating a measurement signal (Um), means of error calculation generating an error signal (e) equal to a difference between the measurement signal (Um) and a setpoint (U0), means of processing of the error signal (e) generating a regulating signal (Ysat) comprising in parallel a first amplifier, an integrator and an anti-saturation system, and comprising, at output, means of generation of a control signal (PWM) controlling the means of control as a function of the regulating signal (Ysat). In accordance with the invention, the anti-saturation system is a conditional detection system.
Abstract:
Device for determining the angular position of a rotor of a rotary electric machine on the basis of signals delivered by a plurality of position sensors, including a circuit producing a control loop for estimating position of the rotor, delivering at output a signal representative of the position, and a circuit for dynamic normalization by the amplitude of the first harmonic of each signal originating from a position sensor. The circuit receives as input each signal originating from a position sensor, and at least one image of the signal representative of the position of the rotor and is configured to demodulate each signal by the image of the signal, determine, at the end of this demodulation, amplitude of the first harmonic of this signal originating from a position sensor, and normalize each signal by dividing it by the amplitude of the first harmonic of the previously determined signal.
Abstract:
A device for determining the angular position of a rotor of a rotary electric machine on the basis of signals delivered by a plurality of position sensors. The device includes a circuit that applies a control loop to estimate the position of the rotor, and that delivers as output a signal representative of the position of the rotor. Also included is at least one circuit for performing dynamic processing of an odd-order harmonic of a signal resulting from the signals delivered by the position sensors.
Abstract:
A communication method and device of a voltage regulator of a motor vehicle alternator on an onboard network, and corresponding voltage regulator and alternator. The communication method according to the invention, for a voltage regulator (36) of a motor vehicle alternator on an onboard network of the vehicle, consists of exchanging information frames on a serial bus (43) according to one or more different proprietary protocols compatible with a standardised protocol. According to the invention, the information frames are encoded or decoded depending on controls and statuses of a standard voltage regulator having predefined characteristics, and the method comprises steps of reading or writing the information frame fields depending on the predefined locations and lengths of same, converting the field values by means of a linear interpolation (39), and addressing the control and status registers (35) of the standard voltage regulator based on predefined parameters.