Power factor measurement device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 6, 2018
Grant Date -
Aug 6, 2015
app pub date -
May 9, 2013
filing date -
May 11, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
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 (12) for coupling to a power supply in parallel with a load, two magnetic elements (21, 22) whose changes in electric resistance are different from each other due to the same external magnetic field, a pair of measurement terminals (13) for outputting a differential voltage between the two magnetic elements, a power factor sensor (10) including a pair of sensor terminals (10t) connected to the pair of coupling ends (12), a voltage detector (15) for measuring a voltage between the measurement terminals (13), a low-pass filter (16) connected to the output of the voltage detector (15), a high-pass filter (17) connected to the output of the voltage detector (15), a rectifier (18) connected to the high-pass filter (17), and a divider (19) for dividing the output of the low-pass filter (16) and the output of the rectifier (18).
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully