Mechatronic assembly controlled by a pulse-width modulation signal

A mechatronic assembly for driving a component intended to be connected on one hand to a continuous electrical power source and on another hand to an electronic control unit comprising a computer for executing a servo algorithm delivering a pulse width modulation input signal having discrete states and a duty cycle encoding direction and torque/speed information, the assembly comprising a polyphase brushless electric motor with P phases (where P>1), probes for binary detection of the position of the rotor of the motor, a power bridge for supplying the P phases of the motor, and an on-board electronic control circuit whose output controls the power bridge ensuring self-switching of the motor by combining information from the direction and torque/speed signal, probes for binary detection of the rotor position and a switching logic directly modulating the current of the continuous electrical power source applied to each of phases of the motor, the direction and torque/speed information provided by the electronic control unit being distinct from the power signal provided only by the power source, a frequency multiplier placed upstream of the electronic control circuit and producing for each discrete state of an input signal XN discrete states of high frequency direction and torque/speed information having the same duty cycle as the input discrete state, of a duration XN times shorter than a duration of the discrete state of the input signal, where X and N are integers ≥1, and whose output frequency is greater than or equal to the electrical frequency of space phasers of the controlled motor.