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Class Information
Number: 323/356
Name: Electricity: power supply or regulation systems > Including a transformer or an inductor > With compensation
Description: Subject matter wherein the transformer has associated therewith circuitry which corrects for undesired phase shift or other discrepancy between the expected and actual outputs of the transformer.










Sub-classes under this class:

Class Number Class Name Patents
323/357 For current transformer 42


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8669745 Transformer based voltage combiner with inductive shunt Mar. 11, 2014
8314674 Electrical transformer with unidirectional flux compensation Nov. 20, 2012
8258772 DC-DC converter Sep. 4, 2012
8237426 Flux linkage compensator for uninterruptible power supply Aug. 7, 2012
8183938 Tuning methods and apparatus for inductively coupled power transfer (ICPT) systems May. 22, 2012
7982442 Power system Jul. 19, 2011
7755299 Transformer for balancing currents Jul. 13, 2010
7675764 Power converter employing integrated magnetics with a current multiplier rectifier and method of operating the same Mar. 9, 2010
7573363 Communication transformer for power line communication Aug. 11, 2009
7573253 System for managing electrical consumption Aug. 11, 2009
7550951 Two-step battery charger Jun. 23, 2009
7525297 Current transformer with impedance compensation and associated methods Apr. 28, 2009
7436164 Untethered device employing tunable resonant circuit Oct. 14, 2008
7417875 Power converter employing integrated magnetics with a current multiplier rectifier and method of operating the same Aug. 26, 2008
7180282 Apparatus for metering at least one type of electrical power over a predetermined range of service voltages Feb. 20, 2007
7122999 Circuit for compensating rise times and ringing in high impedance loads Oct. 17, 2006
7002333 Process and device for compensating the low frequency magnetic field in an inductive signal coupling unit Feb. 21, 2006
6727791 Capacitive voltage transformer Apr. 27, 2004
6713999 Current sensor working in accordance with the compensation principle Mar. 30, 2004
6661072 Piezoelectric ceramic transistor Dec. 9, 2003
6577111 Controlling magnetizing current in a transformer by comparing the difference between first and second positive peak values of the magnetizing current with a threshold Jun. 10, 2003
6545453 Systems and methods for providing voltage regulation externally to a power transformer Apr. 8, 2003
6469486 Flux equalized transformer circuit Oct. 22, 2002
6384588 Method and apparatus for asymmetrically inducing voltages in transformer secondary windings while avoiding saturation of the transformer core May. 7, 2002
6326772 Power supply apparatus with energy return for reuse Dec. 4, 2001
6252386 Non-contact power supply system and apparatus and carrying equipment using the system Jun. 26, 2001
6201382 Low noise and energy loss power supply apparatus and voltage converter Mar. 13, 2001
6181124 Eddy current reducing system Jan. 30, 2001
6087818 Recreational vehicle voltage booster Jul. 11, 2000
6087822 Power transformer with internal differential mode distortion cancellation Jul. 11, 2000
6021054 Smoothing circuit for switching power supply for reduction of noise Feb. 1, 2000
6020732 Flux cancelling transformer line circuit Feb. 1, 2000
5936856 Method and apparatus for active common-mode voltage compensation in induction motor systems Aug. 10, 1999
5905372 Apparatus and method for delivering power to a contactless portable data device May. 18, 1999
5905367 Power inverter apparatus using a transformer with its primary winding connected the source end and a secondary winding connected to the load end of an AC power line to insert series compensati May. 18, 1999
5747980 Differential transformer correction by compensation May. 5, 1998
5663636 Method for reducing waveform distortion in an electrical utility system and circuit for an electrical utility system Sep. 2, 1997
5654630 Contactless sensor driven by single power supply Aug. 5, 1997
5652507 Apparatus and method for measuring an AC current which saturates the core of a current transformer Jul. 29, 1997
5495241 Method for reducing power loss in devices for contactless data and energy transfer, and apparatus for performing the method Feb. 27, 1996
5450076 Method for reducing power loss in devices for contactless data and energy transmission, and apparatus for performing the method Sep. 12, 1995
5424626 Tuned A.C. power systems compensator having variable reflective impedance for linear and non-linear reactive load compensation Jun. 13, 1995
5408165 Device comprising a multiphase load, a static converter and inductance coils Apr. 18, 1995
5369355 Compensation circuit for transformer linearization Nov. 29, 1994
5325046 Inductive wireless data connection Jun. 28, 1994
5300744 High-frequency heating device employing switching type magnetron power source Apr. 5, 1994
5276394 Compensated transformers Jan. 4, 1994
5274704 Transformer telephone line interface circuit Dec. 28, 1993
5150046 Noise-shielded transformer Sep. 22, 1992
5122725 Negative feedback power supply apparatus Jun. 16, 1992

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