Self-switching, reversible linear actuator having bifilar control

Abstract

The invention relates to a mechatronic assembly for linearly driving a member, including a control unit (1) and an actuator (2), the control unit (1) including a control algorithm and a power bridge, said algorithm controlling said power bridge, the power bridge providing a bifilar electrical signal (6) consisting of a torque signal and a direction signal, the actuator (2) including an electric motor which does not have an N-phase multiphase brush (8), binary probes (11) for detecting the position of the rotor of said motor (8), a device for transforming the rotational movement of the rotor into a linear movement of the control member, power switches (25) capable of powering the N phases of the motor (8) on the basis of the bifilar electrical signal (6), characterised in that the state of the power switches (25) is controlled directly by a signal from the detection probes (11).

Description

technical field [0001] The present invention relates to the field of linear electric actuators, for example for controlling the flow of a fluid flowing in a thermal engine of a motor vehicle, and more particularly to the field of reversible actuators requiring a safe return to a reference position, the so-called The "fail-safe" feature of the battery controls fluid flow during battery power cut-offs. The present invention more precisely relates to a two-wire controlled self-switching reversible linear actuator which is superior to prior art actuators in terms of compactness, effective force, durability, high temperature resistance and cost. actuator. Background technique [0002] Fluid dosing valves are known comprising a reversible actuator consisting of a direct current motor or a direct current geared motor combined with a cam switching system to produce linear movement and Control regulates flow. These combinations of prior art are based on different solutions of elec...

AI Technical Summary

Problems solved by technology

[0009] However, this solution requires the use of complex control electronics incorporating smart components that interpret information from the rotor position sensors to thereby control the stator phase

This makes the solution costly and temperature limited since the microcontroller managing the motor control is limited to 140°C, which is too low for the new requirements of the valve environment under the hood

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