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:
Jul. 28, 2015
Filed:
Aug. 26, 2013
Samsung Electronics Co., Ltd., Suwon-Si, Gyeonggi-Do, KR;
Hyun-bae Kim, Yongin-si, KR;
Abstract
A method of controlling an output voltage of an inverter driving an electric motor may include removing harmonic components of an output current, which is output to the electric motor, by using a low pass filter and obtaining a fundamental component of the output current; calculating a current total harmonic distortion by using the fundamental component of the output current; comparing the current THD with a reference current THD; determining a pulse width modulation method to be changed from a first modulation method for reducing the harmonic components of the output current to a second modulation method for reducing a switching frequency of the inverter if the current THD is less than the reference current THD, the PWM method modulating a pulse width of a control pulse signal for controlling the output voltage of the inverter; and/or generating the control pulse signal based on the determined PWM method.