Device for the dynamic measurement of the torque of a self-synchronous motor and device for the servo-control of a self-synchronous motor using this device
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United States of America Patent
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Oct 22, 1991
Grant Date -
N/A
app pub date -
Jun 28, 1990
filing date -
Jul 7, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The device for the dynamic measurement of the torque Ci of a polyphase self-synchronous motor comprises a sensor of the electrical angle between one of the phases and the axis perpedicular to the magnetic moment (APMM), circuits for the computation of the cosines of the angles (A, A-120.degree., A+120.degree.) between each phase and the APMM, sensors of current on each phase, and means to compute the torque Ci by application of the formula: Ci=k[i8.cos A+i2.cos (A+120.degree.)+i3.cos (A+120.degree.)]
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