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/* Patent Analysis */
===Patent Analysis===
{| border="2" cellspacing="0" cellpadding="5" width="100%"
| rowspan="2" style="background-color:#ccffff99ccff"| <center>'''S. No'''</center>| rowspan="2" style="background-color:#ccffff99ccff"| <center>'''Patent / Publication No.'''</center>| rowspan="2" style="background-color:#ccffff99ccff"| <center>'''Publication Year'''</center>| rowspan="2" style="background-color:#ccffff99ccff"| <center>'''Assignee / Applicant'''</center>| rowspan="2" style="background-color:#ccffff99ccff"| <center>'''Title'''</center>| colspan="2" style="background-color:#ccffff99ccff"| <center>'''Doclera Analysis'''</center>
|-
| style="background-color:#ccffff99ccff"| <center>'''Problem'''</center>| style="background-color:#ccffff99ccff"| <center>'''Solution'''</center> |-| style="background-color:#99ccff"| <center>'''1'''</center>| <center>US20100117605A1</center>| <center>2010</center>| <center>Woodward SEG GMBH </center>| Method of and apparatus for operating a double-fed asynchronous machine in the event of transient mains voltage changes| The short-circuit-like currents in the case of transient mains voltage changes lead to a corresponding air gap torque which loads the drive train and transmission lines can damages or reduces the drive train and power system equipments.| The method presents that the stator connecting with the network and the rotor with a converter. The converter is formed to set a reference value of an electrical amplitude in the rotor, by which a reference value of the electrical amplitude is setted in the rotor after attaining a transient mains voltage change, such that the rotor flux approaches the stator flux.
|-
| style="background-color:#ccffff99ccff"| <center>1'''2'''</center>| <center>[http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.html&r=1&f=G&l=50&s1=%2220100045040%22.PGNR.&OS=DN/20100045040&RS=DN/20100045040 US20100045040A1]</center>
| <center>2010</center>
| <center>Vestas Wind Systems</center>
|-
| style="background-color:#ccffff99ccff"| <center>2'''3'''</center>| <center>[http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.html&r=1&f=G&l=50&s1=%2220090267572%22.PGNR.&OS=DN/20090267572&RS=DN/20090267572 US20090267572A1]</center>
| <center>2009</center>
| <center>Woodward SEG GMBH </center>
|-
| style="background-color:#ccffff99ccff"| <center>3'''4'''</center>| <center>[http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.html&r=1&f=G&l=50&s1=%2220090008944%22.PGNR.&OS=DN/20090008944&RS=DN/20090008944 US20090008944A1]</center>| style="background-color:#ffffff"| <center>2009</center>| <center>Universidad Publica De NavarraUNIVERSIDAD PUBLICA DE NAVARRA</center>
| Method and system of control of the converter of an electricity generation facility connected to an electricity network in the presence of voltage sags in said network
| Double-fed asynchronous generators are very sensitive to the faults that may arise in the electricity network, such as voltage sags. During the sag conditions the current which appears in said converter may reach very high values, and may even destroy it.
|-
| style="background-color:#ccffff99ccff"| <center>4'''5'''</center>| <center>[http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=7355295.PN.&OS=PN/7355295&RS=PN/7355295 US7355295B2]</center>
| <center>2008</center>
| <center>Ingeteam Energy, S.A.</center>
|-
| style="background-color:#ccffff99ccff"| <center>5'''6'''</center>| <center>[http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.html&r=1&f=G&l=50&s1=%2220080203978%22.PGNR.&OS=DN/20080203978&RS=DN/20080203978 US20080203978A1]</center>
| <center>2008</center>
| <center>Semikron</center>
|-
| style="background-color:#ccffff99ccff"| <center>6'''7'''</center>| <center>[http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.html&r=1&f=G&l=50&s1=%2220070210651%22.PGNR.&OS=DN/20070210651&RS=DN/20070210651 US20070210651A1]</center>
| <center>2007</center>
| <center>Hitachi, Ltd.</center>
|-
| style="background-color:#ccffff99ccff"| <center>7'''8'''</center>| <center>[http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.html&r=1&f=G&l=50&s1=%2220070132248%22.PGNR.&OS=DN/20070132248&RS=DN/20070132248 US20070132248A1]</center>
| <center>2007</center>
| <center>General Electric</center>
|-
| style="background-color:#ccffff99ccff"| <center>8'''9'''</center>| <center>[http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.html&r=1&f=G&l=50&s1=%2220060192390%22.PGNR.&OS=DN/20060192390&RS=DN/20060192390 US20060192390A1]</center>
| <center>2006</center>
| <center>Gamesa Innovation</center>
|-
| style="background-color:#ccffff99ccff"| <center>9'''10'''</center>| <center>[http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.html&r=1&f=G&l=50&s1=%2220050189896%22.PGNR.&OS=DN/20050189896&RS=DN/20050189896 US20050189896A1]</center>
| <center>2005</center>
| <center>ABB Research LTD</center>
|}
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* [[Media:Doublyfed_induction_generator1.xls| Sample analysis on Doubly-Fed Induction Generator-Patent Literature]]<br>
