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:
Mar. 27, 2007
Filed:
Mar. 25, 2005
Minghua Fu, Plano, TX (US);
Joao L. Andres, Mesquite, TX (US);
Jacob Scaria, Mesquite, TX (US);
Tyco Electronics Power Systems, Inc., Mesquite, TX (US);
Abstract
The present invention provides a neutral point controller for use with a three level rectifier. In one embodiment, the neutral point controller includes a primary drive circuit configured to provide primary drive signals for the three level rectifier thereby establishing output voltages having a common neutral point. Additionally, the neutral point controller also includes a current balancing compensator coupled to the primary drive circuit and configured to maintain the common neutral point within a predefined voltage by adjusting the primary drive signals based on a current balancing feedback signal. In an alternative embodiment, the neutral point controller further includes a duty cycle compensator coupled to the current balancing compensator and configured to maintain the common neutral point within the predefined voltage by adjusting the primary drive signals based on a direct balancing pulse width modulation signal.