ClassID:

201720

H01F27/385 - CPC Classification

Classification description:

Details of transformers or inductances, in general; Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields; Auxiliary core members; Auxiliary coils or windings for reducing harmonics

Recent Application in this class:
#1
20250329492
2025-10-23

ACTIVE POWER TRANSFORMER FOR CONTROLLING NON-UNIFORM VOLTAGE

#2
20240349417
2024-10-17

WAVEFORM DETECTION OF STATES AND FAULTS IN PLASMA INVERTERS

#3
20230363078
2023-11-09

Waveform detection of states and faults in plasma inverters

#4
20220344093
2022-10-27

Transformer arrangement

#5
20220301767
2022-09-22

Electrical power transformation system and process

#6
20220285074
2022-09-08

WOUND CORE

#7
20220189686
2022-06-16

FLAT WINDING / EQUAL COUPLING COMMON MODE INDUCTOR APPARATUS AND METHOD OF USE THEREOF

#8
20210274630
2021-09-02

Waveform detection of states and faults in plasma inverters

#9
20210210278
2021-07-08

Fully integrated inversely weakly coupled power inductor

#10
20210166867
2021-06-03

Current dependent inductivity

#11
20190260335
2019-08-22

Weakly coupled based harmonic rejection filter for feedback linearization power amplifier

#12
20190139698
2019-05-09

Electric appliances with inductive capacitive reactor

#13
20180331769
2018-11-15

Apparatus for reducing a magnetic coupling between a first electronic circuit and a second electronic circuit

#14
20180254755
2018-09-06

Weakly coupled based harmonic rejection filter for feedback linearization power amplifier

#15
20180218832
2018-08-02

Inductor system having shared material for flux cancellation

#16
20180040416
2018-02-08

Inductor system having shared material for flux cancellation

#17
20170213642
2017-07-27

Earth surface potential and harmonic mitigating transformers

#18
20170201223
2017-07-13

Integrated circuit fields canceller system

#19
20160300662
2016-10-13

Device and method for reducing a magnetic unidirectional flux component of a transformer core

#20
20160181008
2016-06-23

Transformer

#21
20140292471
2014-10-02

TRANSFORMER

#22
20140266531
2014-09-18

Weakly coupled based harmonic rejection filter for feedback linearization power amplifier

#23
20140266459
2014-09-18

RF power amplifier with PM feedback linearization

#24
20140266458
2014-09-18

RF replicator for accurate modulated amplitude and phase measurement

#25
20140266457
2014-09-18

Gain and phase calibration for closed loop feedback linearized amplifiers

#26
20140266452
2014-09-18

RF power amplifier with total radiated power stabilization

#27
20140266451
2014-09-18

Power amplifier with wide dynamic range am feedback linearization scheme

#28
20140266432
2014-09-18

Amplifier phase distortion correction based on amplitude distortion measurement

#29
20140139042
2014-05-22

Port isolation in shared transformers

#30
20120092908
2012-04-19

Multi-level parallel power converters

#31
20120075051
2012-03-29

Magnetic Devices and Transformer Circuits Made Therewith

#32
20110115590
2011-05-19

Hybrid transformer with transformation and improved harmonics functions, unbalanced current, and a power supply system thereof

#33
20100320994
2010-12-23

Multi-parallel magnetic-field cancellation type transformer

#34
20100320982
2010-12-23

Combined type transformer and buck-boost circuit using the same

#35
20100213921
2010-08-26

Pre-charging an inverter using an auxiliary winding

#36
20100194517
2010-08-05

Current-compensated choke and circuit arrangement with a current-compensated choke

#37
20100194373
2010-08-05

Electrical transformer with unidirectional flux compensation

#38
20100090789
2010-04-15

Method, system and transformer for mitigating harmonics

#39
20100001822
2010-01-07

Methods and configurations of LC combined transformers and effective utilizations of cores therein

#40
20090267718
2009-10-29

Magnetic-field cancellation type transformer

#41
20090180305
2009-07-16

Multi-parallel magnetic-field cancellation type transformer

#42
20090046486
2009-02-19

Magnetic integrated circuit for multiphase interleaved flyback converter and controlling method thereof

#43
20080303620
2008-12-11

DC inductor

#44
20080297126
2008-12-04

Combined type transformer and buck-boost circuit using the same

#45
20080007381
2008-01-10

Method and apparatus for substantially reducing electrical earth displacement current flow generated by wound components

#46
20070290670
2007-12-20

Device for reducing harmonics in three-phase poly-wire power lines

#47
20070080771
2007-04-12

Method and apparatus for substantially reducing electrical earth displacement current flow generated by wound components

#48
20060103496
2006-05-18

Electric component having a variable air gap effect

#49
20060034101
2006-02-16

Method and apparatus for substantially reducing electrical earth displacement current flow generated by wound components

#50
20050258927
2005-11-24

Simplified harmonic-free constant-voltage transformer

#51
20050248324
2005-11-10

Power supply for measuring the line impedance of underground cable

#52
20050146902
2005-07-07

Method and apparatus for substantially reducing electrical earth displacement current flow generated by wound components

#53
20050077887
2005-04-14

Rectification system for improving power quality of electrical power systems

#54
20050068144
2005-03-31

Inductor arrangement