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:
Nov. 06, 2018
Filed:
May. 09, 2013
Osaka City University, Osaka, JP;
Hiroaki Tsujimoto, Osaka, JP;
OSAKA CITY UNIVERSITY, Osaka, JP;
Abstract
A small-sized power factor measurement apparatus capable of measuring a power factor by one element is desired. The power factor measurement apparatus includes a pair of coupling ends () for coupling to a power supply in parallel with a load, two magnetic elements () whose changes in electric resistance are different from each other due to the same external magnetic field, a pair of measurement terminals () for outputting a differential voltage between the two magnetic elements, a power factor sensor () including a pair of sensor terminals () connected to the pair of coupling ends (), a voltage detector () for measuring a voltage between the measurement terminals (), a low-pass filter () connected to the output of the voltage detector (), a high-pass filter () connected to the output of the voltage detector (), a rectifier () connected to the high-pass filter (), and a divider () for dividing the output of the low-pass filter () and the output of the rectifier ().