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Class Information
Number: 307/83
Name: Electrical transmission or interconnection systems > Plural supply circuits or sources > Plural transformers
Description: Subject matter relating to plural transformers.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8664871 High voltage power supply for powering a magnetron in a UV curing lamp assembly Mar. 4, 2014
8598742 Server and method for detecting work state of power transformers Dec. 3, 2013
8570047 Battery fault detection with saturating transformers Oct. 29, 2013
8368337 HVAC equipment phase and voltage monitor and control Feb. 5, 2013
8283807 High voltage power supply Oct. 9, 2012
8283806 High voltage power supply Oct. 9, 2012
8264163 Backlight apparatus and transformer thereof Sep. 11, 2012
8223510 Switching mode power supply and a method of operating the power supply in a power save mode Jul. 17, 2012
8212408 Collection of electric power from renewable energy sources via high voltage, direct current systems with conversion and supply to an alternating current transmission network Jul. 3, 2012
7948777 Switching mode power supply and a method of operating the power supply in a power save mode May. 24, 2011
7932640 High voltage power supply Apr. 26, 2011
7642888 Electric reactor of controlled reactive power and method to adjust the reactive power Jan. 5, 2010
7635965 Electric power king Dec. 22, 2009
7619903 Switching mode power supply and a method of operating the power supply in a power save mode Nov. 17, 2009
7532494 Power supply unit May. 12, 2009
7471014 Method and apparatus distributing power to a load in a powered device Dec. 30, 2008
7425780 Safety interface system Sep. 16, 2008
7385314 Power supply having power saving mode Jun. 10, 2008
7365451 Power converter Apr. 29, 2008
7307361 Medium voltage power converter formed using low voltage drives Dec. 11, 2007
7166933 Submarine power feeding branching device for submarine power feeding system having submarine feeding cables arranged in mesh pattern Jan. 23, 2007
7138731 Switching converter having a controllable load element Nov. 21, 2006
7122917 Control arrangement and isolated power supplies for power electronic system Oct. 17, 2006
7071582 Output rising slope control technique for power converter Jul. 4, 2006
7053503 Cross current compensation control system for a power system May. 30, 2006
7026727 Power supply with multiple transformer current sharing Apr. 11, 2006
6987331 Voltage recovery device for use with a utility power network Jan. 17, 2006
6979916 Step wave power converter Dec. 27, 2005
6906433 Method and apparatus for regulating the efficiency of a power supply in a computer system Jun. 14, 2005
6833635 Dual input DC-to-DC power converter Dec. 21, 2004
6608404 Step wave power converter Aug. 19, 2003
6552447 Power supplying apparatus, image forming apparatus and method of controlling the same Apr. 22, 2003
6483205 Distributed transformer control Nov. 19, 2002
6483203 Single unit integrated transformer assembly Nov. 19, 2002
6466627 Pulse signal transmitting circuit and subscriber's line terminal apparatus using the pulse signal transmitting circuit Oct. 15, 2002
6340851 Modular transformer arrangement for use with multi-level power converter Jan. 22, 2002
6198178 Step wave power converter Mar. 6, 2001
6194795 Transformer configuration Feb. 27, 2001
6133650 DC power source device with standby mode Oct. 17, 2000
5999428 Invertor with reduced common mode voltage Dec. 7, 1999
5920132 Non-rotating portable voltage sag generator Jul. 6, 1999
5862042 Multiple output DC to DC converter Jan. 19, 1999
5825152 Load-commutated synchronous motor drive Oct. 20, 1998
5703415 Power supply circuit Dec. 30, 1997
5687068 Power supply for in-line power controllers and two-terminal electronic thermostat employing same Nov. 11, 1997
5642005 Method for interconnecting two synchronous polyphase AC networks and interconnecting apparatus for the same Jun. 24, 1997
5355293 Low-voltage DC power supply Oct. 11, 1994
5127464 Thermostat providing electrical isolation therein between connected heating and cooling transformers Jul. 7, 1992
5029285 Power back feed protection device Jul. 2, 1991
5008560 Load totalizing blocked throwover control Apr. 16, 1991

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