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:
Oct. 10, 2017
Filed:
Jan. 14, 2015
Rockwell Automation Technologies, Inc., Mayfield Heights, OH (US);
Yogesh P. Patel, Grafton, WI (US);
Rangarajan Tallam, Germantown, WI (US);
Brian P. Brown, Mayville, WI (US);
Jiangang Hu, Grafton, WI (US);
James J. Campbell, Milwaukee, WI (US);
Rockwell Automation Technologies, Inc., Mayfield Heights, OH (US);
Abstract
Precharging systems and methods are presented for precharging a DC bus circuit in a power conversion system, in which precharging current is connected through a precharging resistance coupled between only a single AC input line and the DC bus circuit when the DC bus voltage is less than a non-zero threshold, and a controller individually activates controllable rectifier switching devices when the DC bus voltages greater than or equal to the threshold using DC gating or pulse width modulation to selectively provide a bypass path around the precharging resistance for normal load currents in the power conversion system.