METHOD AND DEVICE FOR MEASUREMENT OF TORQUE OF AC ELECTRIC MACHINE Russian patent published in 2008 - IPC G01L3/00 

FIELD: measuring technique; electric engineering.

SUBSTANCE: deformation of resilient member is measured by means of resistance-strain gauges connected according to measuring resistance strain bridge and resistance strain relay. Tooth of armature of electric machine's stator is used as resilient member. Curve deformation of tooth is measured and electro-motive force, induced by magnetic field of machine in conductors of resistance strain gauges, is measured to eliminate affect of magnetic field of machine onto electric signal. Device has resilient member, resistance strain gauges disposed onto resilient member and connected according to measuring resistance strain bridge, resistance strain relay which measured resilient deformations. Resistance strain gauges are disposed in pairs at both sides of tooth of stator's armature in areas with uniform magnetic field. They are connected with arms of measuring resistance strain gauges bridge in series opposition.

EFFECT: improved precision of measurement of torque.

2 cl, 3 dwg