Valeo Systemes D'essuyage

Jose-Luis Herrada

Gérald Caillot

Jean-Michel Jarasson

Marcel Trebouet

Giuseppe Grasso

Frédéric Giraud

Frédéric Bretagnol

Jean-François Rousseau

Quentin Aubugeau

Mehdi Belhaj

Frédéric Floquet

Alexandre Paschutine

Xiang Liu

Medhi Belhaj

The invention relates to a geared motor comprising a first brushless electric motor part having a stator, a rotor and a drive shaft, a second part having an output shaft and a reduction gear mechanism and an electronic part. The reduction gear mechanism comprises an output shaft, a worm and a toothed wheel designed to be engaged by the worm and to drive the output shaft in rotation. The geared motor comprises at least one rolling guide bearing disposed on the drive shaft and a multipolar magnet for measuring the position of the rotor. The rolling bearing is disposed between the measurement magnet and the worm such that the electric motor can be controlled depending on the measurement of the position of the rotor.

Brushless direct-current electric motor for a motor vehicle wiper system

A brushless DC motor () comprises a rotor comprising magnetic elements twining poles of the electric motor () and a control magnet comprising a number of pole pairs equal to three times that of the electric motor (), a stator having electromagnetic excitation coils, at least one first and one second Hall-effect sensor (') configured to detect predetermined angular positions of the rotor, and a control unit configured to apply a predetermined sequence of excitation signals to the coils, wherein the Hall-effect sensors are spaced apart by an angle greater than or equal to 10°, the first Hall-effect sensor () is used to determine the switching times of the excitation signals and the second Hall-effect sensor (′) is used, in combination with the first Hall-effect sensor (), to determine the direction of rotation of the rotor when the motor starts up, or vice versa.

Brushless direct current electric motor and associated control method

The invention relates to a gear motor () for a motor vehicle wiper system including an electric motor () including a rotor () and a rotation shaft () fixed to the rotor, a reduction gear mechanism () including a worm/worm wheel system, a device for generating an axial load configured to offset axial play of the rotation shaft (), including a retaining wedge () mounted in a sliding manner in a radial direction of said rotation shaft (), said retaining wedge () exerting an axial load on the outer race of a ball bearing () configured to guide the rotation shaft. According to the invention, said retaining wedge () is arranged in an intermediate position between the seat () of the bearing support () and the worm () directly adjacent to the worm wheel (), said axial load (Fa) exerted by the retaining wedge () on the outer race () of the ball bearing () being in the direction away from the worm ().

Gear motor for a motor vehicle wiper system

The system concerns a gear motor for a motor vehicle wiping system comprising:&#x2014;an electric motor comprising a rotor, a stator and a rotating shaft solidly attached to the rotor,&#x2014;a reducing mechanism connecting the rotating shaft and an output shaft of the gear motor. According to the invention, a roller bearing () guides the rotating shaft () at one of the longitudinal ends of the rotating shaft, said roller bearing (), arranged inside the rotor and stator assembly, housed in an inner recess of the rotor, and in which a hollow support bears the magnetic elements and is arranged coaxially and connected in rotation with the rotating shaft (), said hollow support () covering said roller bearing () guiding the longitudinal end of the rotating shaft () on the side of the electric motor (), the axial locking of the roller bearing () on the rotating shaft () being obtained by pressing against the inner race of the roller bearing () on the inner wall of the hollow support (), directly or indirectly through the intermediary of a spacer ().

Gear motor for motor vehicle wiping system

The present invention relates to a gear motor (), in particular for a wiper system, comprising: -a brushless DC electric motor () including: -a rotor; -a stator having coils for electromagnetically exciting the rotor; -a device for determining the angular position of the rotor; -a control unit configured to generate control signals for supplying power to the electromagnetic excitation coils of the stator; -a reduction mechanism () that is linked on one side to the rotor of the electric motor () and on the other side to an output shaft (), the reduction mechanism () having a predefined reduction ratio and; -an output angular position sensor () that is configured to measure the angular position of the output shaft (), wherein the output angular position sensor () that is configured to transmit a signal corresponding to the measured angular position of the output shaft () to the device for determining the angular position of the rotor and said device is configured to determine the position of the rotor on the basis of the transmitted signal by taking into account the predefined reduction ratio of the reduction mechanism (). The invention also relates to a wiper system and to a method for controlling the electric motor ().

Gear motor, associated wiper system and associated control method

The present invention relates to a rotor () of a rotary electric machine, comprising: in which the last coil (C, C'), situated radially furthest towards the outside, comprises a predetermined number of turns that is lower than the predetermined number of turns of the other coils of the series (C. . . C, C&#x2032; . . . C&#x2032;).

Rotor of rotating electrical machine and associated fabrication process

The present invention relates to a rotor () of a rotary electric machine, comprising:

A brushless direct current electric motor for a wiping system. The brushless direct current electric motor includes a rotor, a stator, a Hall effect sensor to detect control magnet angular position of the rotor, and a control unit to determine rotor angular positions in relation to the stator from the signals Hall effect sensor signals and to generate control signals to electromagnetic excitation coils of the rotor as a function of the determined angular position of the rotor. The control unit includes a clock configured to: estimate the angular position of the rotor at predetermined instants lying between two changes of state of the Hall effect sensor, determine values of the control voltages associated with the angular positions of the rotor estimated for the predetermined instants, and generate a substantially sinusoidal control signal from the determined voltage values.

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Le Mesnil Saint Denis, France

Jose-Luis Herrada