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:
May. 21, 2024
Filed:
Jan. 24, 2020
Magna International Inc., Aurora, CA;
Bo Sheng, Kingston, CA;
Xiang Zhou, Kingston, CA;
Wenbo Liu, Kingston, CA;
Yang Chen, Kingston, CA;
Yan-Fei Liu, Kingston, CA;
Andrew Yurek, Kingston, CA;
Lakshmi Varaha Iyer, Troy, MI (US);
Gerd Schlager, Kefermarkt, AT;
Michael Neudorfhofer, Sankt Valentin, AT;
Wolfgang Baeck, Sankt Valentin, AT;
MAGNA POWERTRAIN GMBH & CO KG, Lannach, AT;
Abstract
A multi-phase LLC power converter comprises a plurality of LLC phases each including a resonant tank and a switching stage. The resonant tank includes a resonant inductor, a resonant capacitor, and a parallel inductance. The switching stage switches an input power at an operating frequency to apply a switched power to the resonant tank, with the switched power approximating an alternating current (AC) waveform having a switching frequency. A secondary-side controller varies the switching frequency to control an output voltage of the multi-phase LLC power converter. A primary-side controller measures primary-side currents, calculates an initial switch-controlled capacitor (SCC) conduction phase angle for each of the LLC phases, and operates an SCC switch in accordance with an SCC conduction phase angle to adjust the capacitance of the resonant capacitor of an LLC phase to cause each of the LLC phases to have equal resonant frequencies.