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:
Dec. 07, 2010
Filed:
Feb. 04, 2009
Jung Seok Lee, Daejeon, KR;
Chan Ki Kim, Daejeon, KR;
Noh Hong Kwak, Daejeon, KR;
Jae Won Chang, Daejeon, KR;
Seok Jin Lee, Seoul, KR;
Hyoung Bae Moon, Seoul, KR;
Jung Seok Lee, Daejeon, KR;
Chan Ki Kim, Daejeon, KR;
Noh Hong Kwak, Daejeon, KR;
Jae Won Chang, Daejeon, KR;
Seok Jin Lee, Seoul, KR;
Hyoung Bae Moon, Seoul, KR;
Korea Electric Power Corporation, Seoul, KR;
Abstract
A voltage-sourced High-Voltage Direct Current (HVDC) apparatus, which converts 3-phase AC voltage from a 3-phase AC power source into high voltage DC through a rectifier including switching elements, is provided. In the apparatus, a rectifier controller receives detected 3-phase currents, apparent power, and active power and generates D and Q-axis signals. A D/Q controller receives the signals and generates active power D-axis signal and apparent power Q-axis signal. A PWM unit generates PWM on/off signals for turning on/off the switching elements based on output signals from the D/Q controller. The D/Q controller includes a rotary converter to convert the D and Q-axis signals into AC signals and D and Q-axis order units coupled thereto, and generates the D and Q-axis signals through the order units. The PWM unit converts the D and Q-axis signals into 3-phase AC signals and compares them with 3-phase triangular waves to generate on/off signals for turning on/off the switching elements.