Abstract: A system for determining the absolute torque applied to a rotating shaft includes a sensitive element that is deformable under torsion and a measuring device having first and second coders that are intended to be rotationally fixed, respectively, in the vicinity of each end of the sensing element. The coders have a singularity or several equally distributed singularities; first and second fixed sensors disposed opposite to and at an air gap which is a predetermined distance from, respectively, the first and second coders, wherein each sensor is able to deliver a signal having a pulse corresponding to the detection of a singularity of the coder. The system also includes a device for processing the signals transmitted by the sensors that is able to calculate the angular difference between the singularities in order to determine, by comparison with a calibration difference, the absolute torque applied.

Abstract: The system for determining the absolute angular position ? of a steering wheel (1) of a motor vehicle with respect to the chassis thereof comprises a device for incrementally measuring the relative angular position ? of the steering wheel, a device (2) for measuring the differential velocity ? V/V of the wheels mounted on the same axle and a processing device (8) for sampling the angular positions and differential velocities at a period t. Said device comprises computing means suitable to determine at moments tn: the estimate ?* (tn) of an absolute angular position ?(tn) according to the differential velocity ? V/V, the mean difference offset(tn) between the angular positions ?* (tn) and ? (ti), wherein i is a variant ranging from 0 to n and the absolute angular position ?(tn) by the addition between the mean difference offset(tn) and the angular position ?(tn).

Abstract: A device for determining the absolute angular position of a turning device with respect to a fixed structure, including an encoder provided with a main multipolar track and a multipolar track called “top turn,” and a measurement means. The top turn track includes M singularities. The measurement means measures the angular position of the turning device with an angular uncertainty ??, in which the M singularities are each representative of an absolute angular position of the turning device and are distributed over the top turn track with an angular separation between each one greater than 2 ??.

Abstract: A system (1) for determining the absolute torque applied to a rotating shaft, the said system (1) comprising a sensitive element (2) deformable under torsion and a measuring device comprising: first (5) and second (6) coders intended to be rotationally fixed respectively in the vicinity of each of the ends (3, 4) of the sensing element (2), the said coders (5, 6) having a singularity or several singularities equally distributed; first (10) and second (11) fixed sensors disposed opposite to and at an air gap distance from respectively the first (5) and second (6) coders, each of the said sensors (10, 11) being able to deliver a signal having a pulse (I1, I2) corresponding to the detection of a singularity (8a, 8b) of the coder (5, 6); the said system also comprises a device (12) for processing the signals issuing from the sensors (10, 11) able to calculate the angular difference between the said singularities (8a, 8b) so as to determine, by comparison with a calibration difference, the absolute torque app

Abstract: A device for determining the absolute angular position of a turning device with respect to a fixed structure, including an encoder provided with a main multipolar track and a multipolar track called “top turn”, said top turn track includes M singularities which are distributed angularly so that the top turn signal (C) is arranged so as to define, in conjunction with the signals A and B, the binary sequences which are each representative of an absolute angular position of the encoder. The invention also concerns a steering system for automobiles as well as a bearing including such a device.

Abstract: A device for controlling an electronically switched motor which includes a coder (2) having a main multipole track (2a) and a so-called “revolution pip” multipole track (2b); a fixed sensor (3) delivering two digital position signals (A, B) and one revolution pip signal (C); a circuit for switching the currents in the phase windings of the motor which comprises 2*P*N switches; a control circuit for the switching circuit which is able to supply the switching signals for the switches which correspond to the state of the logic determined by the revolution pip signal (C) or by the position signals (A, B). The control device can be combined with a bearing and/or a motor equipped with such a device.

Abstract: A device for controlling an electronically switched motor comprising a coder (2) provided with a main multipole track (2a) and a so-called “revolution pip” multipole track (2b), the said tracks each comprising N identical sectors (2c) angularly distributed respectively over the entire circumference of the said tracks, the sectors (2c) of the revolution pip track (2b) each comprising M angularly distributed singularities (2b1), the M singularities (2b1) being distributed angularly so that the revolution pip signal (C) is arranged so as, in combination with the signals A and B, to define binary sequences of angular length less than that of the sectors (2c) and which represent the absolute angular position of the coder (2) on a sector (2c). The invention also relates to a bearing and a motor equipped with such a device, as well as a method for controlling such a motor.

Abstract: A device for the analog measurement of a torsion torque, a steering column incorporating the device and a module comprising the device. The device comprising a test body which can be deformed by torsion, first and second magnetic pulse generators connected in the vicinity of a first and of a second end, respectively, of the test body, a first and a second analog magnetic sensor, and an electronic treatment device capable of forming, from input analog signals A, B, C, D which are functions of the detected signals, the output signal F(A, B, C, D)=((B*C)?(A*D))/((B*D)+(A*C)) which is a function of the torque applied to said shaft.

Abstract: The invention relates to a bearing provided with an annular means generating magnetic pulses and with a device for detecting these pulses, wherein the detection device comprises a plurality of aligned sensitive elements.

Abstract: A device for determining the absolute angular position of a turning device with respect to a fixed structure, including an encoder provided with a main multipolar track and a multipolar track called “top turn”, said top turn track includes M singularities which are distributed angularly so that the top turn signal (C) is arranged so as to define, in conjunction with the signals A and B, the binary sequences which are each representative of an absolute angular position of the encoder. The invention also concerns a steering system for automobiles as well as a bearing including such a device.

Abstract: A device for determining the absolute angular position of a turning device with respect to a fixed structure, including an encoder provided with a main multipolar track and a multipolar track called “top turn”, said top turn track includes M singularities, a means for measuring the angular position of the turning device with an angular uncertainty T, in which the M singularities are each representative of an absolute angular position of the turning device and are distributed over the top turn track with an angular separation between each one greater that 2T. The invention also concerns a steering system for automobiles as well as a bearing including such a device.

Abstract: The invention relates to an electronically commutated motor (1) comprising P phases and N pairs of poles, in which a circular multipole encoder (12) is associated with the rotating ring (6a) of an anti-friction bearing (6), said encoder (12) comprising a main multipole track (12a) and a multipole commutation track (12b) comprising 2*P*N singularities (12b1-12b6) equidistributed angularly and a control device comprising a fixed sensor (15) capable of delivering square digital signals A, B in quadrature and a digital signal C in the form of 2*P*N pulses per revolution of the encoder (12), a circuit for commutating (20) the currents in the phase windings of the motor (1) and a control circuit (21) for the commutation circuit (20).

Abstract: The invention relates to a device for controlling an electronically switched motor comprising a coder (2) provided with a main multipole track (2a) and a so-called “revolution pip” multipole track (2b), the said tracks each comprising N identical sectors (2c) angularly distributed respectively over the entire circumference of the said tracks, the sectors (2c) of the revolution pip track (2b) each comprising M angularly distributed singularities (2b1), the M singularities (2b1) being distributed angularly so that the revolution pip signal (C) is arranged so as, in combination with the signals A and B, to define binary sequences of angular length less than that of the sectors (2c) and which represent the absolute angular position of the coder (2) on a sector (2c).

Abstract: A device for controlling an electronically switched motor which includes a coder (2) having a main multipole track (2a) and a so-called “revolution pip” multipole track (2b); a fixed sensor (3) delivering two digital position signals (A, B) and one revolution pip signal (C); a circuit for switching the currents in the phase windings of the motor which comprises 2*P*N switches; a control circuit for the switching circuit which is able to supply the switching signals for the switches which correspond to the state of the logic determined by the revolution pip signal (C) or by the position signals (A, B). The control device can be combined with a bearing and/or a motor equipped with such a device.

Abstract: A bearing provided with an annular means generating magnetic pulses and with a device for detecting these pulses, wherein the detection device comprises a plurality of aligned sensitive elements. The sensitive elements are placed equidistantly from one another and the detection device comprises an even number 2N of sensitive elements.

Abstract: The invention relates to an electric power-assisted steering system making it possible to apply an assist torque for the angular displacement of the wheels of a vehicle, said torque being applied by an electronically commutated motor (2) comprising P phases and N pairs of poles, said system also comprising a device for controlling the motor (2) comprising a circular multipole encoder (17) comprising a main multipole track (17a) and a multipole commutation track (17b) comprising magnetic singularities (17b1-17b6) equidistributed angularly, a fixed sensor (19) capable of delivering square digital signals A, B in quadrature, and a signal C in the form of 2*P*N pulses per revolution of the rotor (3), a circuit for commutating (20) the currents in the phase windings of the motor (2) and a control circuit (21) for the commutation circuit (20).

Abstract: The invention relates to a device for controlling an electronically commutated motor (1) comprising P phases and N pairs of poles (5), said device comprising: a circular multipole encoder (4) comprising a main multipole track (4a) and a multipole commutation track (4b) comprising 2*P*N singularities (4b1-4b6) equidistributed angularly; a fixed sensor (6) capable of delivering square digital signals A, B in quadrature and a digital signal C in the form of 2*P*N pulses (TP1-TP6) per revolution of the encoder; a commutation circuit (7) having 2*P*N switches (T1-T6); a control circuit (8) for the commutation circuit (7) which: from the signal c supplies commutation signals for the switches (T1-T6); and from the signals A, B and according to a first current set point (I*) defines a second current set point (Iref) which controls the current (Im) supplying the phase windings of the motor (1).

Abstract: A sensor of position and/or of displacement of a moving member generating magnetic pulses. The sensor comprises a plurality of aligned sensitive elements that are divided into at least two subassemblies. The signals emanating from the subassemblies are processed by an electronic circuit able to deliver two analog signals in substantially perfect quadrature.

Abstract: A test body deformable upon application of torque to a turning shaft. First and second bearings with the turning collar of the first bearing being connected near a first end of the test body and the turning collar of the second bearing being connected near a second end of the test body. Each bearing is equipped with a digital device for determining the angular position of the turning collar relative to the fixed collar. Each digital device includes an annular device for generating magnetic pulses, mounted for turning jointly with the turning collar, and a fixed magnetic sensor for detecting the magnetic pulses and for delivering digital signals. An electronic device processes digital signals from the magnetic sensors to determine the angular position of the annular devices, and a comparison device compares the digital signals to ascertain the torque applied to the turning shaft.

Abstract: A fixed magnetic sensor (16) is used to determine absolute angular position of a turning component (3, 4). A detection device (27) detects an angular position of a multipole magnetic ring (11) near a reference angular position. A resetting device (28) resets the angular position of the multipole magnetic ring (11) detected by detection device (27). The resetting device (28) is capable of assigning a value called “offset” to the value of the absolute angular position of the multipole magnetic ring (11). A determination device (29) determines the absolute angular position of the multipole magnetic ring (11) on all of the turns made by a turning component (3, 4) ascertained from the offset value and variations in the angular position.