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:
Feb. 18, 2025
Filed:
Dec. 02, 2022
Mabuchi Motor Co., Ltd., Matsudo, JP;
Kohei Hamazaki, Matsudo, JP;
MABUCHI MOTOR CO., LTD., Chiba, JP;
Abstract
A resolver-to-digital converter circuit for performing signal processing on a resolver sensor including a SIN exciting coil, a COS exciting coil, and a detecting coil includes: a control device configured to generate excitation signals for the SIN and COS exciting coils; an excitation waveform generating unit configured to generate excitation waveforms for the SIN and COS exciting coils from the corresponding excitation signals; and a detecting unit configured to generate a signal indicating the angle of rotation of the resolver sensor based on a detection signal outputted from the detecting coil. The control device has: a waveform generating unit configured to perform ΔΣ modulation to generate PDM waveforms; a first waveform memory configured to store a PDM waveform corresponding to the excitation signal for the SIN exciting coil; and a second waveform memory configured to store a PDM waveform corresponding to the excitation signal for the COS exciting coil.