TORQUE DETECTOR BY APPLICATION OF RESOLVER

摘要

PURPOSE:To simplify constitution and to improve the reliability of measurement by connecting the rotor windings of resolvers disposed respectively to a driving shaft and output shaft to each other, applying an excitation voltage to one stator and deriving the phase signal proportional to a helix angle from the other stator. CONSTITUTION:A revolving shaft 1 which transmits torque consists of the driving shaft 11 connecting to a driving source, the output shaft 13 connecting to load and a torsion spring 12 interposed and fixed between both shafts to connect the two shafts. Two-phase excitation winding is wound to the stator 31 of the resolver 3 disposed on the shaft 11 side and two-phase output winding is wound to the rotor 32 thereof. The two-phase excitation winding is wound to the rotor 42 of the resolver 4 mounted to the shaft 13 side and the single-phase output winding is wound to the stator 41 thereof. The corresponding phases of the output winding of the rotor 32 and the excitation winding of the rotor 42 are connected by a signal line 5 and the resolver 4 is excited by the output signal of the resolver 3, then the output signal has the phase proportional to the helix angle of the spring 12 with respect to the reference voltage which is the excitation current of the resolver 3 and therefore the torque detection is made possible by measuring the phase difference thereof.