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:
Jan. 09, 2024
Filed:
Mar. 18, 2021
Denso Corporation, Kariya, JP;
Masahiro Seguchi, Kariya, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
A field coil type rotating electric machine includes a field coil having first and second windings connected in series with each other, a rotor having main poles on which the first and second windings are wound, and a stator having a stator coil comprised of phase windings to which harmonic currents are respectively supplied to induce field current in the field coil. In the rotor, there are formed a series resonant circuit including the first winding and a capacitor and a parallel resonant circuit including the second winding and the capacitor. The first winding is radially located closer to the stator than the second winding is. Moreover, N1<N2 and 120°<θs<240°, where N1 and N2 are respectively the numbers of turns of the first and second windings and θs is a phase offset between electric currents flowing respectively in the series and parallel resonant circuits.