ClassID:

201726

H01F27/42 - CPC Classification

Classification description:

Details of transformers or inductances, in general Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils

Sub-classes:
Recent Application in this class:
#1
20260094761
2026-04-02

SYSTEMS AND METHODS FOR IMPLEMENTING AN AIR CORE INDUCTOR ARRAY

#2
20260088216
2026-03-26

ELECTRONIC COMPONENT

#3
20260066175
2026-03-05

Wireless Power Receiving Device with a Magnet and a Choke

#4
20250273381
2025-08-28

TRANSFORMER ASSEMBLIES AND TRANS-INDUCTANCE VOLTAGE REGULATION

#5
20250253094
2025-08-07

RADIATION HARDENED ACTIVE POWER TRANSFORMER

#6
20250253081
2025-08-07

MULTI-CORE SEGMENT VARIABLE INDUCTOR WITH DIFFERENT CORE MATERIALS, AND CONTROL CIRCUIT AND CONTROL METHOD THEREOF

#7
20250157727
2025-05-15

SYSTEMS AND METHODS FOR AMPLIFYING POWER

#8
20250149237
2025-05-08

SYSTEM WITH ACHIEVED IMPEDANCE MATCHING

#9
20250111989
2025-04-03

TRANSFORMER DC MAGNETIZATION DETECTION AND MITIGATION THROUGH VIBRATION MEASUREMENT

#10
20250087415
2025-03-13

A Magnetic Coupling Coil Optimization Method, Device, Computer Equipment and Storage Medium

#11
20240404748
2024-12-05

ISOLATION TRANSFORMER

#12
20240297533
2024-09-05

ELECTRONIC DEVICE RECEIVING WIRELESS POWER

#13
20240006114
2024-01-04

High-Efficiency Resonant Inductance Coupling Type Wireless Power Transfer using a Combined Coil Structure

#14
20230088782
2023-03-23

HIGH-ENERGY SCALABLE, PULSE-POWER, MULTIMODE MULTIFILAR-WOUND INDUCTOR

#15
20230063872
2023-03-02

Four-terminal-pair alternating current quantum resistance dissemination bridge and related method

#16
20220413018
2022-12-29

VOLTAGE SAMPLER AND SOLID-STATE TRANSFORMER

#17
20220293326
2022-09-15

Multi-phase integrated coupled inductor structure

#18
20220158492
2022-05-19

Electronic device receiving wireless power

#19
20220084737
2022-03-17

Planar winding transformer

#20
20220059285
2022-02-24

System for an inductive energy transmission from a primary-conductor system to a vehicle having a secondary winding

#21
20220044866
2022-02-10

High-energy scalable, pulse-power, multimode multifilar-wound inductor

#22
20210408987
2021-12-30

Balun device and differential phase shifter

#23
20210407731
2021-12-30

Magnetically controllable choke coil having central connection

#24
20210391791
2021-12-16

Power supply system, control device, and method for measuring reactor current

#25
20210358685
2021-11-18

Test and measurement instrument for determining magnetic core losses

#26
20210257158
2021-08-19

Current transformer powered controller

#27
20210166866
2021-06-03

Transformer circuitry

#28
20210108280
2021-04-15

Metal strip and manufacturing method therefor, magnetic core, and coil component

#29
20200203054
2020-06-25

POWER SUPPLY PLATFORM SUPPORTING INTEGRATED TRANSFORMER AND DISCONNECT

#30
20200191852
2020-06-18

Method and circuit for detecting an arc fault

#31
20200186043
2020-06-11

Power conversion apparatus having Scott-T transformer

#32
20200152366
2020-05-14

Low EMI transformator and low EMI electric cable

#33
20200126706
2020-04-23

Device for evaluating and demagnetizing residual magnetism quantity of power transformer and control method thereof

#34
20200082976
2020-03-12

Leakage reactance plate for power transformer

#35
20200051767
2020-02-13

Power switch

#36
20190362889
2019-11-28

Long range coil and power source for a magnetic field generator

#37
20190333692
2019-10-31

Isolation transformer with low unwanted resonances, energy transfer device having an isolation transformer and energy transfer device for wireless transfer of energy having an isolation transformer

#38
20190326872
2019-10-24

Transformer with high common-mode rejection ratio (CMRR)

#39
20190304673
2019-10-03

System and method for transformer control

#40
20190235035
2019-08-01

Gate driver

#41
20190190254
2019-06-20

Method for phase controlled energizing of power transformer

#42
20190156985
2019-05-23

HIGH ACCURACY TUNING OF RESONANT NETWORK

#43
20190124956
2019-05-02

Device and system for generating low frequency alternating electric field, and signal conditioning method

#44
20190081567
2019-03-14

Flexible power converter architecture based on interposer and modular electronic units

#45
20190019620
2019-01-17

Flat adjustable capacitor for magnetic resonance scanner

#46
20180358175
2018-12-13

ACTIVE INDUCTOR

#47
20180350514
2018-12-06

Insulation type step-down coverter

#48
20180348275
2018-12-06

Sensor excitation in systems where remote sensor signal processing is performed

#49
20180268981
2018-09-20

METHOD AND SYSTEM FOR CONTROLLING COOLING SYSTEM OF POWER EQUIPMENT

#50
20180254142
2018-09-06

Coil module and wireless power transmission device using the same

#51
20180247753
2018-08-30

Combined subsea transformer and compensating HV reactor

#52
20180233281
2018-08-16

Reactor and method for producing the same

#53
20180224491
2018-08-09

System and method for tuning transformers

#54
20180222501
2018-08-09

Railroad vehicle, voltage estimating device for power supply line, and method for estimating voltage of power supply line

#55
20180211770
2018-07-26

System for an inductive energy transmission from a primary-conductor system to a vehicle having a secondary winding

#56
20180151291
2018-05-31

INDUCTOR WITH EMBEDDED DIODE

#57
20180145653
2018-05-24

Coil device

#58
20180122565
2018-05-03

Converter device and coil arrangement for a voltage regulator

#59
20180108472
2018-04-19

Enhanced common mode current reduction in three-phase inductors, transformers, and motor drive systems

#60
20180082781
2018-03-22

Circuit arrangement for reducing a magnetic unidirectional flux component in the core of a transformer

#61
20180061562
2018-03-01

INDUCTOR AND PROTECTION CIRCUIT

#62
20180019589
2018-01-18

FAULT CURRENT LIMITER

#63
20180005752
2018-01-04

Common mode choke coil

#64
20170330682
2017-11-16

Arrangement and method for reducing a magnetic unidirectional flux component in the core of a transformer

#65
20170311636
2017-11-02

Storage device

#66
20170310125
2017-10-26

Self-oscillating energy extraction and utilization booster module circuits

#67
20170303389
2017-10-19

Semiconductor device

#68
20170303378
2017-10-19

Cascaded filament transformer within a resistive shroud

#69
20170258117
2017-09-14

Fryer

#70
20170256356
2017-09-07

Power supply circuit

#71
20170256355
2017-09-07

Inductive energy transmission system

#72
20170236636
2017-08-17

Low crosstalk magnetic devices

#73
20170213643
2017-07-27

Apparatus for reducing a magnetic unidirectional flux component in the core of a transformer

#74
20170213641
2017-07-27

Circuit arrangement for reducing a unidirectional flux component in the soft-magnetic core of a transformer

#75
20170207022
2017-07-20

Integrated device package comprising a tunable inductor

#76
20170169940
2017-06-15

Circuit arrangement for compensation of a DC component in a transformer

#77
20170155241
2017-06-01

Controlled switching devices and method of using the same

#78
20170154720
2017-06-01

Coil device

#79
20170148563
2017-05-25

Electrical device comprising a gas-insulated apparatus, in particular a gas-insulated transformer or reactor

#80
20170140868
2017-05-18

Variable inductor and method for manufacturing the same

#81
20170117868
2017-04-27

Transformer-type phase shifter, phase-shift circuit, and communication terminal apparatus

#82
20170089986
2017-03-30

Measuring arrangement for detecting a magnetic unidirectional flux in the core of a transformer

#83
20170084386
2017-03-23

DC compensation for high DC current in transformer

#84
20170032891
2017-02-02

Varainductor and operation method thereof based on mutual capacitance

#85
20160365807
2016-12-15

Power conversion device with a plurality of series circuits

#86
20160301321
2016-10-13

Current regulator with feedback circuit for AC coupling

#87
20160300662
2016-10-13

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

#88
20160293544
2016-10-06

INDUCTOR ASSEMBLY AND METHOD OF USING SAME

#89
20160293314
2016-10-06

Method to optimize operation of a transformer cooling system, the corresponding system and a method to determine the VFD capacity

#90
20160260537
2016-09-08

TRANSFORMER BASED LCTANK STRUCTURE

#91
20160226309
2016-08-04

Wireless power transmission via inductive coupling using di/dt as the magnetic modulation scheme

#92
20160181009
2016-06-23

Low crosstalk magnetic devices

#93
20160164486
2016-06-09

Transformer filter arrangement

#94
20160125999
2016-05-05

Apparatus for reducing a magnetic unidirectional flux component in the core of a transformer

#95
20160124024
2016-05-05

Self-correcting current transformer system

#96
20160015076
2016-01-21

Storage device using potential generator

#97
20150364929
2015-12-17

Systems and methods for induction charging with a closed magnetic loop

#98
20150318103
2015-11-05

Hybrid planar common-mode choke

#99
20150303733
2015-10-22

REDUCING MAGNETIC FIELD VARIATION IN A CHARGING DEVICE

#100
20150279553
2015-10-01

System and method for tuning transformers

#101
20150263636
2015-09-17

Distribution transformer

#102
20150160288
2015-06-11

Power device including current transformer and method for compensating of current transformer

#103
20150145628
2015-05-28

Printed circuit board

#104
20150145342
2015-05-28

Power feeding coil unit and wireless power transmission device

#105
20150145339
2015-05-28

Power feeding coil unit and wireless power transmission device

#106
20150086040
2015-03-26

Tunable inductive device for parametric audio systems and related methods

#107
20150028827
2015-01-29

Transformer core flux control for power management

#108
20140320235
2014-10-30

System and method for wideband high current RF choke network

#109
20140268968
2014-09-18

Transformer for an inverter system and an inverter system comprising the transformer

#110
20140266506
2014-09-18

Transformer filter arrangement

#111
20140225449
2014-08-14

Integrated resonator-shield structures

#112
20140210571
2014-07-31

Transformer filter arrangement

#113
20140145813
2014-05-29

PLANAR HIGH VOLTAGE TRANSFORMER

#114
20140139041
2014-05-22

Contactless power transfer system and method

#115
20140035711
2014-02-06

Magnetically biased AC inductor with commutator

#116
20140021927
2014-01-23

ADAPTIVE CURRENT CONTROL FOR INDUCTIVE LOADS

#117
20140015510
2014-01-16

Method and device for linearizing a transformer

#118
20130314071
2013-11-28

Transformer correction circuit and technique for reducing cross-talk current

#119
20130249313
2013-09-26

Power transmission system and power receiving jacket

#120
20130234526
2013-09-12

Multiphase power converters involving controllable inductors

#121
20130208390
2013-08-15

Systems using multi-layer-multi-turn high efficiency inductors

#122
20130207483
2013-08-15

Arrangement and method for the compensation of a magnetic unidirectional flux in a transformer core

#123
20130201592
2013-08-08

Device and method for reducing a magnetic unidirectional flux fraction in the core of a transformer

#124
20130199027
2013-08-08

Method for manufacture of multi-layer-multi-turn high efficiency inductors

#125
20130155553
2013-06-20

MAGNETIZING INRUSH CURRENT SUPPRESSION APPARATUS

#126
20130119773
2013-05-16

Systems and methods for induction charging with a closed magnetic loop

#127
20130027019
2013-01-31

Power supply with means for increasing a voltage

#128
20120326526
2012-12-27

Inductively coupled data and power transfer system and apparatus

#129
20120176213
2012-07-12

Energy saving switch of continuously powered transformers

#130
20120052824
2012-03-01

Variable gain control transformer and RF transmitter utilizing same

#131
20120026767
2012-02-02

Power conversion device

#132
20120019963
2012-01-26

Device and method for eliminating transformer excitation losses

#133
20110234010
2011-09-29

Contactless power transfer system and method

#134
20110095848
2011-04-28

SYSTEM AND METHOD FOR WIDEBAND HIGH CURRENT RF CHOKE NETWORK

#135
20110084680
2011-04-14

Transformer based voltage combiner with inductive shunt

#136
20110080157
2011-04-07

Flux linkage compensator for uninterruptible power supply

#137
20110067083
2011-03-17

Fully integrated tuner architecture

#138
20110026286
2011-02-03

Transformer with Power Factor Compensation and A DC/AC Inverter Constructed Thereby

#139
20100315190
2010-12-16

Versatile distribution transformer

#140
20100239030
2010-09-23

Method and apparatus for detection of load impedance modulation in a transformer circuit

#141
20100237884
2010-09-23

Integrated switchless programmable attenuator and low noise amplifier

#142
20100226064
2010-09-09

Trimmable transformer arrangement

#143
20100202160
2010-08-12

Power converter transformer for suppressing conduction EMI and power supply having its transformer

#144
20100181845
2010-07-22

Temperature compensation in a wireless transfer system

#145
20100167667
2010-07-01

Setting of a balun

#146
20100156193
2010-06-24

Inductively coupled data and power transfer system and apparatus

#147
20100123527
2010-05-20

NETWORK TRANSFORMER TO REDUCE ELECTROMAGNETIC INTERFERENCE

#148
20100117781
2010-05-13

Procedure and equipment for the reduction of iron mass requirements of electric machines with prevention of magnetic saturation

#149
20100109431
2010-05-06

Device and method for eliminating transformer excitation losses

#150
20100090789
2010-04-15

Method, system and transformer for mitigating harmonics

#151
20100041262
2010-02-18

Energy Saving Switch of Continuously Powered Transformers

#152
20100039206
2010-02-18

Method and device for operating a transformer

#153
20090195069
2009-08-06

SIGNAL TRANSMISSION CIRCUIT

#154
20090021083
2009-01-22

Power grid filter choke

#155
20080284919
2008-11-20

Fully integrated tuner architecture

#156
20080247195
2008-10-09

DC/DC converter

#157
20080203819
2008-08-28

Energy Storage Device of a Transformer

#158
20080062589
2008-03-13

HIGH-VOLTAGE POWER SUPPLIES

#159
20080054874
2008-03-06

Power converter employing regulators with a coupled inductor

#160
20080024114
2008-01-31

Method and system for transformer control

#161
20080013350
2008-01-17

Planar transformer power supply

#162
20070241854
2007-10-18

Voltage stress reduction in magnetics using high resistivity materials

#163
20070222548
2007-09-27

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

#164
20070120605
2007-05-31

Integrated switchless programmable attenuator and low noise amplifier

#165
20070115085
2007-05-24

Direct current link inductor for power source filtration

#166
20070077908
2007-04-05

Fully integrated tuner architecture

#167
20070014373
2007-01-18

Method and apparatus for cancellation of magnetizing inductance current in a transformer circuit

#168
20070014371
2007-01-18

Method and apparatus for detection of load impedance modulation in a transformer circuit

#169
20070013433
2007-01-18

Temperature compensation for internal inductor resistance

#170
20070001660
2007-01-04

Transformer balance circuit

#171
20060276155
2006-12-07

Signal transmission arrangement having a transformer and a receiver circuit

#172
20060092673
2006-05-04

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

#173
20060071649
2006-04-06

Apparatus and method for multi-phase transformers

#174
20050168890
2005-08-04

Method & apparatus for transient suppressing high-bandwidth voltage regulation

#175
20050153677
2005-07-14

System and method for on-chip filter tuning

#176
20050107055
2005-05-19

Integrated switchless programmable attenuator and low noise amplifier

#177
20050013084
2005-01-20

Means for controlling a coil arrangement with electrically variable inductance

#178
18515174
2025-08-05

Impedance control transformer assembly

#179
18506425
2024-09-10

Systems and methods for amplifying power

#180
17334453
2024-01-09

Impedance control transformer assembly

#181
17085052
2022-01-25

Controlled three-pole close for transformers

#182
17071009
2021-10-19

Low modulation index 3-phase solid state transformer

#183
16114329
2019-09-10

Wireless power and data transfer for unmanned vehicles

#184
15639360
2018-04-10

Power supply system