ClassID:

201747

H01F30/12 - CPC Classification

Classification description:

Fixed transformers not covered by group characterised by the structure Two-phase, three-phase or polyphase transformers

Sub-classes:
Recent Application in this class:
#1
20260135029
2026-05-14

CIRCUIT BREAKER DEVICE WITH CURRENT SENSE TRANSFORMERS HAVING PRIMARY WINDING TURNS IN OPPOSING DIRECTIONS

#2
20260128703
2026-05-07

RAILROAD-CAR POWER CONVERSION APPARATUS

#3
20260058471
2026-02-26

Power Control Apparatus and Method

#4
20250329492
2025-10-23

ACTIVE POWER TRANSFORMER FOR CONTROLLING NON-UNIFORM VOLTAGE

#5
20250299874
2025-09-25

HIGH POWER HIGH CURRENT TRANSFORMER

#6
20250285792
2025-09-11

POWER STAGE COOLED TRANSFORMER WITH VERTICAL OFFSET

#7
20250253778
2025-08-07

MAGNETIC COMPONENT FOR THREE-PHASE LLC POWER CONVERSION CIRCUIT

#8
20250201458
2025-06-19

ELECTRONIC COMPONENT, IN PARTICULAR THREE-PHASE TRANSFORMER FOR AN ISOLATED VOLTAGE CONVERTER

#9
20250140471
2025-05-01

IMPROVED LOW-EMI TRANSFORMER

#10
20250087416
2025-03-13

Multi-Winding Transformer and Power Conversion Device

#11
20250054688
2025-02-13

Power Control Apparatus and Method

#12
20250029767
2025-01-23

Magnetic Core

#13
20240420886
2024-12-19

Electrical power transformer and electrical power transformation system

#14
20240420885
2024-12-19

TRANSFORMER HAVING A TERTIARY WINDING

#15
20240312702
2024-09-19

CIRCUIT BREAKER DEVICE WITH PRIMARY WINDING TURNS IN OPPOSING DIRECTIONS

#16
20240274350
2024-08-15

TRANSFORMER AND METHOD OF GENERATING MULTIPLE MULTIPHASE OUTPUT SIGNALS

#17
20240263289
2024-08-08

Fe-BASED AMORPHOUS ALLOY RIBBON, PRODUCTION METHOD THEREOF, IRON CORE, AND TRANSFORMER

#18
20240242875
2024-07-18

ASYMMETRIC DELTA MULTI-PULSE TRANSFORMER RECTIFIER UNIT, AND ASSOCIATED SYSTEMS AND METHODS

#19
20240191333
2024-06-13

Fe-based amorphous alloy ribbon, production method thereof, iron core, and transformer

#20
20240177926
2024-05-30

TRANSFORMER ASSEMBLY AND ELECTRIC CONVERSION DEVICE

#21
20240120144
2024-04-11

High-frequency transformer

#22
20240047122
2024-02-08

COIL WINDING STRUCTURE OF WOUND IRON CORE TRANSFORMER

#23
20230282413
2023-09-07

POWER TRANSFORMER ASSEMBLY

#24
20230274877
2023-08-31

Autotransformer, autotransformer-rectifier unit and method for connecting a piece of electrical equipment to a three-phase grid by means of an autotransformer-rectifier unit

#25
20230268117
2023-08-24

TRANSFORMER DEVICE

#26
20230100669
2023-03-30

REACTOR, CONVERTER, AND POWER CONVERSION DEVICE

#27
20230085737
2023-03-23

POWER CONVERSION CIRCUIT

#28
20230049615
2023-02-16

Bi-directional line-interphase transformer-based converter

#29
20230018527
2023-01-19

ROTARY TRANSFORMER AND ROTATING MACHINE COMPRISING SUCH A ROTARY TRANSFORMER

#30
20220399162
2022-12-15

PHASE-SHIFT AUTOTRANSFORMER, MULTI-PULSE RECTIFIER SYSTEMS AND FAST CHARGING

#31
20220375666
2022-11-24

Fe-based amorphous alloy ribbon, iron core, and transformer

#32
20220364212
2022-11-17

Fe-based amorphous alloy ribbon, production method thereof, iron core, and transformer

#33
20220301767
2022-09-22

Electrical power transformation system and process

#34
20220224236
2022-07-14

Magnetic integration of three-phase resonant converter and accessory power supply

#35
20220130588
2022-04-28

REACTOR AND ELECTRIC POWER CONVERSION DEVICE

#36
20220122767
2022-04-21

Multi-phase transformer

#37
20220093325
2022-03-24

Three-phase magnetics assembly

#38
20220093313
2022-03-24

Power electronic transformer structure

#39
20210366650
2021-11-25

Three-phase inductor and power module

#40
20210319949
2021-10-14

Autotransformer rectifier unit system

#41
20210304958
2021-09-30

Phase-shift autotransformer, multi-pulse rectifier systems and fast charging

#42
20210234469
2021-07-29

MULTI-PHASE SHIFT TRANSFORMER BASED AC-DC CONVERTER

#43
20210134512
2021-05-06

INTERMEDIATE YOKE FOR A POWER TRANSFORMER AND POWER TRANSFORMER

#44
20210118611
2021-04-22

VARIABLE SPEED GENERATOR/MOTOR DEVICE

#45
20200411225
2020-12-31

Integrated magnetic elements

#46
20200373082
2020-11-26

Transformer and method of generating multiple multiphase output signals

#47
20200343040
2020-10-29

Power supply multi-tapped autotransformer

#48
20200336081
2020-10-22

Power supply device, charging system and charge scheduling method

#49
20200335271
2020-10-22

Transformer and method of generating multiple multiphase output signals

#50
20200321154
2020-10-08

REACTOR, MOTOR DRIVER, POWER CONDITIONER AND MACHINE

#51
20200312541
2020-10-01

Multi-phase coupled inductor having compensation windings

#52
20200287475
2020-09-10

Power converters, power distribution systems and methods of converting power

#53
20200244179
2020-07-30

Power converters, power distribution systems and methods of converting power

#54
20200241066
2020-07-30

Intelligent on-line diagnosis and positioning method for winding deformation of power transformers

#55
20200228028
2020-07-16

Inverter system

#56
20200227200
2020-07-16

Coil component, circuit board, and power supply device

#57
20200177094
2020-06-04

Pulsed rectifier architecture

#58
20200169182
2020-05-28

Multi-phase shift transformer based AC-DC converter

#59
20200141982
2020-05-07

Dual feeder systems having current transformers

#60
20200075227
2020-03-05

High-voltage lead structure for three-dimensional wound core of transformer

#61
20200052486
2020-02-13

Longitudinal voltage regulation at the line terminals of a phase shifting transformer

#62
20200005995
2020-01-02

Electromagnetic device

#63
20190393774
2019-12-26

Device for transforming and for rectifying polyphase voltage

#64
20190369651
2019-12-05

Electrical power supply system and process

#65
20190348216
2019-11-14

Real-time detection/recovery system of power line failure in power distribution system and construction method therefor

#66
20190252115
2019-08-15

High voltage transformer apparatus

#67
20190252114
2019-08-15

MAGNETIC COMPONENT, CONVERTER AND INDUCTOR

#68
20190250655
2019-08-15

Transformer device with modified voltage tap arrangement

#69
20190222032
2019-07-18

Device and method for supplying energy to a plurality of energy storage components and/or for providing energy stored within the energy storage components

#70
20190206614
2019-07-04

PHASE-SHIFTING SINUSOIDAL COMMUTATION WITH OPTIONAL ROTARY TRANSFORMER

#71
20190204859
2019-07-04

Electrical power supply system and process

#72
20190198238
2019-06-27

THREE-PHASE TRANSFORMER

#73
20190172635
2019-06-06

Phase Shift Unit

#74
20190115139
2019-04-18

Integrated magnetic elements

#75
20190109542
2019-04-11

Magnetic integrated device including multiple core columns and windings and power conversion circuit

#76
20190096571
2019-03-28

Integrated common mode and differential mode inductors with low near magnetic field emission

#77
20190088411
2019-03-21

Three-phase transformer

#78
20190077270
2019-03-14

Electric vehicle charging station with medium voltage input

#79
20190051444
2019-02-14

Three-Phase High Frequency Transformer

#80
20190035545
2019-01-31

Voltage step-up autotransformer, and AC-to-DC converter comprising such an autotransformer

#81
20190035538
2019-01-31

Barrier arrangement between transformer coil and core

#82
20190027299
2019-01-24

Reactor having terminal block

#83
20190013137
2019-01-10

Reactor having outer peripheral iron core and iron core coils

#84
20190006096
2019-01-03

Transformers with integrated inductors

#85
20180367024
2018-12-20

Power conversion device having a control unit that outputs based on detected inductor current

#86
20180358160
2018-12-13

Stationary induction apparatus

#87
20180337612
2018-11-22

AC/DC CONVERTER OF NESTED STRUCTURE

#88
20180268991
2018-09-20

AC reactor having terminal base

#89
20180233266
2018-08-16

Reactor, motor driver, power conditioner and machine

#90
20180218826
2018-08-02

MAGNETIC CORE, AND CHOKE OR TRANSFORMER HAVING SUCH A MAGNETIC CORE

#91
20180182529
2018-06-28

Transformer including gaps

#92
20180174744
2018-06-21

MULTI-PHASE TRANSFORMER

#93
20180130594
2018-05-10

CORE FOR A 3-PHASE TRANSFORMER, AND A 3-PHASE TRANSFORMER

#94
20180068785
2018-03-08

Stationary induction electrical apparatus

#95
20180061560
2018-03-01

Multiple phase power converters having integrated magnetic cores for transformer and inductor windings

#96
20180061549
2018-03-01

Method and device for manufacturing transformers with a core made of amorphous material, and transformer thus produced

#97
20180047503
2018-02-15

IGNITION DEVICE

#98
20180047499
2018-02-15

DISTRIBUTION TRANSFORMER AND INTEGRATED POWER CONDITIONING DEVICE

#99
20180040409
2018-02-08

Transformer

#100
20180006679
2018-01-04

Auto-balancing transformers

#101
20170352473
2017-12-07

Barrier arrangement between transformer coil and core

#102
20170352466
2017-12-07

Laminated Iron Core Structure and Transformer Including the Same

#103
20170331388
2017-11-16

Three-phase to nine-phase autotransformer

#104
20170316876
2017-11-02

Arrangement of single phase transformers

#105
20170316860
2017-11-02

Container arrangement for power transformers

#106
20170309382
2017-10-26

Coupled inductors with non-uniform winding terminal distributions

#107
20170301450
2017-10-19

Cooling structure for coil component

#108
20170278617
2017-09-28

Vector magnetic characteristic controlled material and iron core

#109
20170250023
2017-08-31

Autotransformer rectifier unit

#110
20170194086
2017-07-06

Magnetic component and magnetic core of the same

#111
20170179840
2017-06-22

Power circuit, iron core for Scott connected transformer, Scott connected transformer, and superheated steam generator

#112
20170179839
2017-06-22

Power circuit, iron core for scott connected transformer, scott connected transformer, and superheated steam generator

#113
20170178801
2017-06-22

Power circuit, iron core for Scott connected transformer, Scott connected transformer, and superheated steam generator

#114
20170178797
2017-06-22

Surface Mount Inductor for Placement Over a Power Stage of a Power Converter

#115
20170178795
2017-06-22

Through-Hole Inductor for Placement Over a Power Stage of a Power Converter

#116
20170169937
2017-06-15

Device and method for reducing a magnetic unidirectional flux component in the core of a three-phase transformer

#117
20170148566
2017-05-25

Symmetrical step-up and step-down autotransformer delta topology

#118
20170089986
2017-03-30

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

#119
20170047732
2017-02-16

Fault Current Limiter

#120
20160358706
2016-12-08

Three-phase high frequency transformer

#121
20160291659
2016-10-06

Power distribution system with rack power distribution unit

#122
20160276099
2016-09-22

Multi-phase autotransformer

#123
20160254756
2016-09-01

Magnetic integrated device for coupling with a three-phase parallel circuit and power conversion circuit

#124
20160233022
2016-08-11

FURNACE TRANSFORMER CAPABLE OF PREVENTING INDUCTION HEAT

#125
20160172982
2016-06-16

Equations for an LLC converter having increased power output capabilities

#126
20160155551
2016-06-02

Coupled inductors with non-uniform winding terminal distributions

#127
20160148746
2016-05-26

Integrated reactors with high frequency optimized hybrid core constructions and methods of manufacture and use thereof

#128
20160071644
2016-03-10

COIL ASSEMBLY FOR A DRY TRANSFORMER, METHOD FOR MANUFACTURING A COIL ASSEMBLY AND DRY TRANSFORMER

#129
20160055970
2016-02-25

High voltage wire leading method for stereoscopic wound core open ventilated dry-type transformer

#130
20160055959
2016-02-25

Fixing structure for upper pressing blocks of stereoscopic wound core open-ventilated dry-type transformer

#131
20160055956
2016-02-25

Multi-phase common mode choke

#132
20160012960
2016-01-14

Symmetrical step-up and step-down autotransformer delta topology

#133
20150318103
2015-11-05

Hybrid planar common-mode choke

#134
20150262749
2015-09-17

Inherently Balanced Zero-Sequence Blocking Inductor (ZSBI)

#135
20150256099
2015-09-10

Six-phase supplied transformer rectifier unit

#136
20150256061
2015-09-10

Inverter device, transformer, and transformer manufacturing method

#137
20150213945
2015-07-30

Transformer and voltage transforming apparatus comprising the same

#138
20150200052
2015-07-16

Integrated circuit chip inductor configuration

#139
20150180361
2015-06-25

Power circuit, iron core for Scott connected transformer, Scott connected transformer, and superheated steam generator

#140
20150170828
2015-06-18

Three-phase reactor

#141
20150162127
2015-06-11

TRANSFORMER USED FOR STORING AND FILTERING

#142
20150162123
2015-06-11

Drum-type tri-phase transformer and methods for producing same

#143
20150145626
2015-05-28

Magnetically shielded three phase rotary transformer having three magnetic cores

#144
20150137924
2015-05-21

Magnetically shielded three-phase rotary transformer

#145
20150116067
2015-04-30

Three phase rotary transformer with free linked fluxes

#146
20150069955
2015-03-12

Symmetric-type UPS power system based on a nine-phase phase-shifting autotransformer

#147
20150028844
2015-01-29

Coupling device for a multi-phase converter

#148
20140362619
2014-12-11

HVDC converter system with transformer functions or arrangements integrated into a single transformer unit

#149
20140354386
2014-12-04

Three-phase magnetic cores for magnetic induction devices and methods for manufacturing them

#150
20140333399
2014-11-13

PSEUDO MECHANICAL ENERGY GENERATOR

#151
20140300344
2014-10-09

Power monitoring systems and methods

#152
20140266086
2014-09-18

Coupled inductors with non-uniform winding terminal distributions

#153
20140247104
2014-09-04

Method for making magnetic components with M-phase coupling, and related inductor structures

#154
20140239939
2014-08-28

Method and device for analysing the quality of the electrical energy in a three-phase electric network

#155
20140118099
2014-05-01

Gas-insulated delta transformer

#156
20140085029
2014-03-27

Laminated “Y”-core transformer

#157
20140049246
2014-02-20

POWER SUPPLY ARRANGEMENT WITH A TRANSFORMER HAVING A TRANSFORMER CORE WITH LEGS ARRANGED IN A POLYGON

#158
20140035710
2014-02-06

Fluid insulated high voltage coil

#159
20140015629
2014-01-16

Three-phase 48-pulse rectifier transformer

#160
20140002229
2014-01-02

Resin-molded stereo wound-core dry-type amorphous alloy transformer

#161
20130328652
2013-12-12

Three-step core for a non-linear transformer

#162
20130300526
2013-11-14

Cooling system for dry transformers

#163
20130229249
2013-09-05

Method for making magnetic components with M-phase coupling, and related inductor structures

#164
20130222099
2013-08-29

Method for making magnetic components with M-phase coupling, and related inductor structures

#165
20130187741
2013-07-25

AUTO-TRANSFORMER RECTIFIER UNIT CORE

#166
20130176092
2013-07-11

COOLED TRANSFORMER HAVING AT LEAST ONE STRIP WINDING

#167
20130170257
2013-07-04

COMPOSITE AC-TO-DC POWER CONVERTER USING WYE ARCHITECTURE

#168
20130162381
2013-06-27

Oil immersed stereo wound-core amorphous alloy transformer

#169
20130141199
2013-06-06

Split-Winding Integrated Magnetic Structure

#170
20130127582
2013-05-23

Single- or multi-phase dry-type transformer having at least two coils

#171
20130121050
2013-05-16

Integrated magnetic device for low harmonics three-phase front-end

#172
20130121043
2013-05-16

Harmonic cancelling interphase magnetic device

#173
20130113587
2013-05-09

Multi-phase transformer and transformation system

#174
20130106546
2013-05-02

Integral mold for a transformer having a non-linear core

#175
20130021126
2013-01-24

TRANSFORMER

#176
20130009737
2013-01-10

Transformer

#177
20120245207
2012-09-27

NICOTINIC ACID COMPOSITIONS FOR TREATING HYPERLIPIDEMIA AND RELATED METHODS THEREFOR

#178
20120243268
2012-09-27

Transformers and methods for constructing transformers

#179
20120188804
2012-07-26

Current supply arrangement for the rectifying three-phase AC current into multi-pulse DC current

#180
20120157685
2012-06-21

INTERMEDIATE RELEASE NICOTINIC ACID COMPOSITIONS FOR TREATING HYPERLIPIDEMIA WHICH EXHIBIT AN IN VIVO STAIR-STEPPED ABSORPTION CURVE

#181
20120146753
2012-06-14

INTEGRATED MULTI-PHASE PLANAR TRANSFORMER

#182
20120139678
2012-06-07

Non-Linear Transformer with Improved Construction and Method of Manufacturing the Same

#183
20120112731
2012-05-10

LOAD SENSING HIGH EFFICIENCY TRANSFORMER ASSEMBLY

#184
20120068800
2012-03-22

Power transformer with amorphous core

#185
20120056706
2012-03-08

Wound transformer core with support structure

#186
20120013428
2012-01-19

STEP-DOWN AUTOTRANSFORMER FOR A POWER DISTRIBUTION SYSTEM WITH NON-LINEAR LOADS

#187
20110291792
2011-12-01

High frequency transformers

#188
20110279212
2011-11-17

Method for making magnetic components with M-phase coupling, and related inductor structures

#189
20110279209
2011-11-17

High-impedance DC-isolating transmission line transformers

#190
20110267848
2011-11-03

POWER CONVERTER

#191
20110248808
2011-10-13

Outdoor dry-type transformer

#192
20110245299
2011-10-06

NICOTINIC ACID COMPOSITIONS FOR TREATING HYPERLIPIDEMIA AND RELATED METHODS THEREFOR

#193
20110221556
2011-09-15

Transformer

#194
20110187484
2011-08-04

Power input device with current pulse multiplier transformer to reduce harmonic currents in converter/inverter circuits and devices, and method of making the same

#195
20110181204
2011-07-28

Balancing transformers for multi-lamp operation

#196
20110156851
2011-06-30

Three-phase high frequency transformer

#197
20110148556
2011-06-23

POWER QUALITY IMPROVEMENT DEVICE AND POWER SUPPLY SYSTEM

#198
20110109412
2011-05-12

Three phasecontinuous flux path transformer core and method of manufacture

#199
20110084790
2011-04-14

NEUTRAL-GROUNDED STRUCTURE FOR DELTA-CONNECTED WINDINGS AND METHOD THEREOF

#200
20110069517
2011-03-24

Arrangement for voltage conversion

#201
20110050377
2011-03-03

Rotary transformer

#202
20100320994
2010-12-23

Multi-parallel magnetic-field cancellation type transformer

#203
20100315190
2010-12-16

Versatile distribution transformer

#204
20100315187
2010-12-16

Method for powering a magnetic coupler and device for powering an electric dipole

#205
20100301833
2010-12-02

LOAD SENSING HIGH EFFICIENCY TRANSFORMER ASSEMBLY

#206
20100240899
2010-09-23

INTERMEDIATE RELEASE NICOTINIC ACID COMPOSITIONS FOR TREATING HYPERLIPIDEMIA WHICH EXHIBIT AN IN VIVO STAIR-STEPPED ABSORPTION CURVE

#207
20100219923
2010-09-02

Zigzag autotransformer apparatus and methods

#208
20100176906
2010-07-15

Transformer

#209
20100164444
2010-07-01

Transforming apparatus for automatically adjusting three-phase power supply voltage

#210
20100148898
2010-06-17

Zigzag autotransformer apparatus and methods

#211
20100073970
2010-03-25

Modular multi-pulse transformer rectifier for use in symmetric multi-level power converter

#212
20100039201
2010-02-18

Choke device for frequency converter

#213
20100028626
2010-02-04

Insulating material for electrical machines

#214
20100019876
2010-01-28

Transient voltage and harmonic currents quashing (THQ) transformers, transformer winding topology, and method of making the same

#215
20090273431
2009-11-05

Lower cost continuous flux path transformer core and method of manufacture

#216
20090267521
2009-10-29

Balancing transformers for multi-lamp operation

#217
20090257560
2009-10-15

3D POLY-PHASE TRANSFORMER

#218
20090230776
2009-09-17

Integrated multi-transformer

#219
20090180305
2009-07-16

Multi-parallel magnetic-field cancellation type transformer

#220
20090179723
2009-07-16

Method for making magnetic components with M-phase coupling, and related inductor structures

#221
20090054499
2009-02-26

Intermediate Release Nicotinic Acid Compositions For Treating Hyperlipidemia Which Exhibit an In Vivo Stair-Stepped Absorption Curve

#222
20080300284
2008-12-04

NICOTINIC ACID COMPOSITIONS FOR TREATING HYPERLIPIDEMIA AND RELATED METHODS THEREFOR

#223
20080246577
2008-10-09

Method for making magnetic components with N-phase coupling, and related inductor structures

#224
20080211617
2008-09-04

Electrical induction device for high-voltage applications

#225
20080197952
2008-08-21

Three-phase Transformer

#226
20080186749
2008-08-07

AC/DC converter for aeronautics

#227
20080158921
2008-07-03

Multilevel converter and method of converting a supply voltage

#228
20080157608
2008-07-03

Electric Oscillatory Machine

#229
20080143465
2008-06-19

Insulation system and method for a transformer

#230
20080101097
2008-05-01

DC-DC converter with integrated transformer assembly composed of transformer pair

#231
20080088466
2008-04-17

System and method to zero-sequence verify ground return path integrity by comparing measured zero-sequence current in an autotransformer with a second zero-sequence current source

#232
20080061711
2008-03-13

Balancing transformers for multi-lamp operation

#233
20080007378
2008-01-10

Toroidal Core Transformer

#234
20080001693
2008-01-03

Configurable multiphase coupled magnetic structure

#235
20070290670
2007-12-20

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

#236
20070285852
2007-12-13

Aluminum wound transformer

#237
20070247266
2007-10-25

Compact dry transformer

#238
20070217103
2007-09-20

Method and equipment for the protection of power systems against geomagnetically induced currents

#239
20070159743
2007-07-12

Electrical equipment for distribution network

#240
20070132537
2007-06-14

Transformer and method of assembly

#241
20070132534
2007-06-14

TRANSFORMER AND METHOD OF ASSEMBLY

#242
20070046415
2007-03-01

Electromagnetic apparatus and method for making a multi-phase high frequency electromagnetic apparatus

#243
20060273872
2006-12-07

Power transformer

#244
20060250207
2006-11-09

Multiple three-phase inductor with a common core

#245
20060238149
2006-10-26

Drive system for a vehicle moving along a trackway, particularly a magnetic levitation train

#246
20060226944
2006-10-12

Adjustable locking wedge system apparatus and method

#247
20060197511
2006-09-07

Transformer with protection against direct current magnetization caused by zero sequence current

#248
20060152318
2006-07-13

High-frequency power transformer

#249
20060125593
2006-06-15

Two part transformer core, transformer and method of manufacture

#250
20060109594
2006-05-25

Safety interface system

#251
20060087393
2006-04-27

Multiphase induction device

#252
20060022783
2006-02-02

Transformer with selectable input to output phase angle relationship

#253
20060017537
2006-01-26

Multi-voltage power transformer for the high-voltage electricity transmission network

#254
20060001516
2006-01-05

Symmetrical phase shifting fork transformer

#255
20050212634
2005-09-29

Overlapped superconducting inductive device

#256
20050156702
2005-07-21

Motionless electromagnetic turbine

#257
20050138797
2005-06-30

Multi-site spare 3-phase transformer

#258
20050093472
2005-05-05

Balancing transformers for ring balancer

#259
20050093471
2005-05-05

Current sharing scheme for multiple CCF lamp operation

#260
20050068147
2005-03-31

Modular inductor for use in power electronic circuits

#261
20050035838
2005-02-17

Auto-transformer for use with multiple pulse rectifiers

#262
20050030140
2005-02-10

Multiphase induction device

#263
16654154
2020-11-24

Low-core-loss transformer with magnetic pillar in center of four corner pillars