The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 03, 1994
Filed:
Aug. 12, 1992
Mitsuhiro Kawamura, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A method of measuring unsaturated inductances of an equivalent circuit of a synchronous machine including measuring a no-load saturation characteristic of a synchronous machine; measuring a three-phase short-circuit characteristic of the synchronous machine; measuring currents and voltages of an armature and a field when an armature coil and a field coil are in a positional relationship wherein a magnetomotive force by flowing current to the armature coil of the synchronous machine becomes a direct-axis magnetomotive force and both when the field coil is in an open-circuit state and when the field coil is in a short-circuit state by direct-axis Dalton-Cameron method; and solving simultaneous equations concerning a direct-axis equivalent circuit of the synchronous machine by using results of the measuring the no-load saturation characteristic, the measuring the three-phase short-circuit characteristic and the measuring by the direct-axis Dalton-Cameron method, thereby obtaining impedances of respective elements constituting the direct-axis equivalent circuit.