| 摘要 |
The invention relates to a device for measuring the angular position of a rotor with respect to a stator. Its subject is a device for measuring the angle of rotation of a rotor with respect to a stator, characterised in that it comprises 2n magnetic sensors, n being the number of sensor electrical tiers, arranged over a circumference in a manner which is fixed with respect to the stator, each sensor comprising a magnetic circuit 4, 5 provided with an emitter coil 6 and a detector coil 7, the said magnetic circuit having an airgap, the sensors being grouped in pairs, the sensors of the same group being angularly offset by an angle 180 DEG /m, two neighbouring groups being angularly spaced with respect to each other by an angle equal to k 360/m, where k is a coefficient depending on the phase number of the sensor, m and n being integers, the emitter coils all being connected in series and supplied by a.c. voltage with a frequency between 2 and 15 kHz, the device furthermore comprising a mobile element 8, 9 integral with the said rotor 1 and provided with m teeth constrained to progress through the airgap of the sensors, the detector coils of the same group of sensors being connected in series, the envelope of the signals at the terminals of these sets of coils representing, to within one phase shift, the image of the measurement of the angle of rotation of the said rotor. Application to rotating and linear electrical motors. <IMAGE>
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