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:
Apr. 06, 2021
Filed:
Oct. 21, 2019
Hyundai Motor Company, Seoul, KR;
Kia Motors Corporation, Seoul, KR;
Joo Young Park, Gyeonggi-do, KR;
Young Un Kim, Gyeonggi-do, KR;
Jae Sang Lim, Gyeonggi-do, KR;
Jae Ho Hwang, Daejeon, KR;
Su Hyun Bae, Daegu, KR;
Yong Jae Lee, Gyeonggi-do, KR;
Tae Young Chung, Gyeonggi-do, KR;
Hyundai Motor Company, Seoul, KR;
Kia Motors Corporation, Seoul, KR;
Abstract
An apparatus for diagnosing failure of a motor driving system using a resolver signal includes a resolver sensing a rotor position and a rotational frequency of a motor, a fast Fourier transform operation unit configured to perform fast Fourier transform on an output signal of the resolver to convert the output signal into frequency signals, a specific frequency band extraction unit configured to extract, from among the frequency signals, a specific frequency band including one or more frequencies selected from among a PWM switching frequency applied to an inverter, a motor's rotational frequency, and a preset resolver excitation signal frequency, and a failure diagnosing unit configured to diagnose failure by comparing a sum or a highest voltage among voltages corresponding to the frequencies included in the specific frequency band with a predetermined reference value.