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:
Nov. 10, 2020
Filed:
Sep. 17, 2019
Renesas Electronics Corporation, Tokyo, JP;
Hiroshi Shimada, Tokyo, JP;
Akane Abe, Tokyo, JP;
RENESAS ELECTRONICS CORPORATION, Tokyo, JP;
Abstract
A control device capable of accurately detecting a rotor rotation angle is provided. The control device includes variable resistors Rto Rfor converting the currents flowing in the four-phase coils of the current detection resolver into voltages, two differential amplifiers for a first phase signal of the voltage difference between the detection voltages of the variable resistors Rand R, and a second phase signal of the voltage difference between the detection voltages of the variable resistors Rand Rrespectively, two phase shifters for shifting the phase of the first phase signal and the second phase signal respectively, a synthesizer for a phase modulation signal by synthesizing the phase shifted first phase signal and the phase shifted second phase signal, and an adjuster for adjusting the resistance values of the variable resistors Rto Rbased on the width of the envelope of the phase modulation signal.