MECHATRONIC ASSEMBLY FOR DRIVING OR POSITIONING AN EXTERNAL MEMBER

An actuator includes a polyphased brushless motor having a two-wire connection for receiving a modulated power supply signal with a cyclic ratio or a modulated frequency, supplied by a motor control unit. The actuator also includes an electronic circuit having a microcontroller and a power stage delivering the power supply signals of the coils of the brushless motor, and a power supply stage including a rectifier and/or a filtering of the modulated signal for delivering a continuous power supply signal of the electronic circuit. The electronic circuit includes: a stage which is external or integral to the decoding microcontroller by temporal determination of the rising and falling edges of the modulated signal for providing: a direction of rotation set point value by analysis of the signal on the two wires; and/or a set point value of the target position of the rotor; and/or a set point value of a pre-recorded movement sequence; and/or a speed set point value, the microcontroller controlling the power supply signal of each of the phases according to the set point values and the power supply signal, the outputs of the power stage feeding the coils of the brushless motor.