METHOD FOR DETERMINING THE STATIC ERROR OF A ROTATING TRANSFORMER Russian patent published in 2023 - IPC G01R35/02 

FIELD: measuring technology.

SUBSTANCE: invention relates to the field of measurements and is intended to determine the static error of a rotating transformer switched on according to the phase shifter scheme. Essence: the rotating transformer is coaxially mounted on the rotary table of the measuring microscope. A disc pulley is fixed orthogonally to its axis on the rotor shaft of a rotating transformer. Then, the initial specified angular position of the rotor of the rotating transformer is set and recorded by means of a high-precision scale, graduated in angular units, of the rotary table of the measuring microscope. Then, harmonic signals shifted in phase by 90° and with the same nominal amplitude and frequency are applied to the cosine and sine excitation windings of the rotating transformer. By means of a frequency meter with a high-precision indicator of the value in angular units, the initial phase of the signal coming from the measuring winding of the rotating transformer is recorded, the value of which is the measured value of the angular position of the rotor. Then the rotary table is rotated around its axis by a small predetermined angle α, if n*α<360°, where n = 1,2,3,…, is the number of turns of the measuring table, then the rotor of the rotating transformer is returned to its initial angular position and the values of the set and measured angular positions of the rotor are recorded by means of the scale of the rotary table of the measuring microscope and the frequency counter indicator, respectively. If n*α>360°, then each of the values of the measured angular positions of the rotor is compared with the corresponding set value of the angular position of the rotor. The result of the comparison is the value of the absolute static error of the rotating transformer.

EFFECT: increasing the accuracy of determining the static error of a rotating transformer.

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