ClassID:

201771

H01F38/18 - CPC Classification

Classification description:

Adaptations of transformers or inductances for specific applications or functions Rotary transformers

Recent Application in this class:
#1
20260135031
2026-05-14

ELECTRICAL MACHINE

#2
20260106072
2026-04-16

POLYPHASE ROTARY TRANSFORMER FOR FIELD EXCITATION OF ELECTRIC MACHINES

#3
20260066748
2026-03-05

TRANSFORMER FOR EXTERNALLY EXCITED SYNCHRONOUS MACHINES: INTEGRATION VIA BEARINGS

#4
20260066184
2026-03-05

SYSTEMS AND METHODS FOR A ROTATING TRANSFORMER

#5
20260061854
2026-03-05

METHOD FOR OPERATING AN ELECTRIC MACHINE, CONTROL DEVICE, INVERTER CIRCUIT, STATOR, ELECTRIC MACHINE AND MOTOR VEHICLE

#6
20250364876
2025-11-27

ELECTRIC MACHINE FOR A MOTOR VEHICLE, ROTOR FOR AN ELECTRIC MACHINE AND MOTOR VEHICLE

#7
20250274023
2025-08-28

SYSTEM WITH AN ELECTRIC ROTARY TRANSFORMER

#8
20250246366
2025-07-31

ELECTRICAL ROTARY TRANSFORMER FOR INDUCTIVE ENERGY TRANSFER

#9
20250218655
2025-07-03

WIRELESS EXCITATION SYSTEM

#10
20250119007
2025-04-10

Brushless Electric Machine with Balance Ring Diodes

#11
20250046504
2025-02-06

Systems and Devices for Strain Relief for Magnetic Cores and Assemblies

#12
20250030306
2025-01-23

ROTOR SHAFT AND ELECTRICAL MACHINE

#13
20250015693
2025-01-09

ROTOR FOR AN EXTERNALLY EXCITED SYNCHRONOUS MACHINE

#14
20250007358
2025-01-02

ROTOR FOR AN EXTERNALLY EXCITED SYNCHRONOUS MACHINE

#15
20240429799
2024-12-26

INDUCTIVELY ELECTRICALLY SYNCHRONOUS MACHINE

#16
20240405649
2024-12-05

EXTERNALLY EXCITED ELECTRIC SYNCHRONOUS MACHINE

#17
20240355540
2024-10-24

PCB-BASED STRANDED, TWISTED EXCITATION WINDINGS IN ROTARY TRANSFORMERS

#18
20240339904
2024-10-10

Inductively electrically excited synchronous machine

#19
20240333115
2024-10-03

Externally excited electric synchronous machine

#20
20240331936
2024-10-03

Electrical rotary transformer for inductive energy transmission

#21
20240085498
2024-03-14

Motor and rotary transformer with shared magnetic core

#22
20240013974
2024-01-11

POWER COUPLING DEVICE

#23
20230124788
2023-04-20

Rotary Transformer

#24
20230102299
2023-03-30

Rotary electrical transformer with preferred lubricant

#25
20230029499
2023-02-02

Motor and rotary transformer with shared magnetic core

#26
20220344884
2022-10-27

Compact integrated rotary joint

#27
20220337086
2022-10-20

System for wirelessly supplying a rotating device with electrical energy

#28
20220263208
2022-08-18

Compact integrated rotary joint with a resonant shield

#29
20220224205
2022-07-14

Resolver assembly for hybrid module

#30
20220224159
2022-07-14

WIRELESS POWER AND DATA TRANSMISSION APPARATUS AND TRANSMISSION MODULE

#31
20220172873
2022-06-02

Systems and devices for strain relief for magnetic cores and assemblies

#32
20220139604
2022-05-05

CAGE CORE INDUCTOR

#33
20210358686
2021-11-18

Wireless excitation system

#34
20210344274
2021-11-04

Electric machine control

#35
20210344199
2021-11-04

Load re-balancing on a multi-phase power system

#36
20210211014
2021-07-08

Rotary connector module for device forming quasi three-dimentional image

#37
20200294714
2020-09-17

Device for the contactless transmission of data and of energy and for angle measurement

#38
20200198104
2020-06-25

Portable electrical tool equipped with a rotary transformer provided with coil having plasto-ferrite support

#39
20200195104
2020-06-18

Method for manufacturing a rotor for an electrical machine with a contactless power transmission system, and rotor, electrical machine and motor vehicle

#40
20200166589
2020-05-28

Motor and rotary transformer with shared magnetic core

#41
20190278386
2019-09-12

Operating device for a vehicle component

#42
20190206617
2019-07-04

Rotating transformer and inductive coupling

#43
20190173315
2019-06-06

Power coupling device

#44
20190103219
2019-04-04

Electric transmission device in relatively rotating parts

#45
20190043667
2019-02-07

Apparatus for transferring electrical energy

#46
20190039705
2019-02-07

Contactless power transmission in an azimuth thruster

#47
20190035548
2019-01-31

Laminated core rotatable transformer

#48
20180340391
2018-11-29

System and method for non-invasive power and data transmission

#49
20180294680
2018-10-11

Resonance type power transmission device

#50
20180233278
2018-08-16

Magnetic core of rotating transformer

#51
20180141666
2018-05-24

Turbine engine having a three-phase transformer for powering electrical deicer elements

#52
20180102213
2018-04-12

Rotary type magnetic coupling device

#53
20180102211
2018-04-12

Rotary type magnetic coupling device

#54
20170316948
2017-11-02

Transformer, plasma processing apparatus, and plasma processing method

#55
20170251994
2017-09-07

Data transfer across a rotating boundary

#56
20170238405
2017-08-17

Line-frequency rotary transformer for computed tomography gantry

#57
20170215833
2017-08-03

Rotary joint with shielding comprising filled SMC and/or BMC materials

#58
20170181723
2017-06-29

Data transfer across a rotating boundary of a computed tomography imaging apparatus

#59
20170179728
2017-06-22

ELECTROMAGNETIC INDUCTION APPARATUS FOR POWER TRANSFER

#60
20170125162
2017-05-04

System and method for increasing coupling of an axle rotary transformer

#61
20170092419
2017-03-30

Magnetically permeable core and an inductive power transfer coil arrangement

#62
20170084388
2017-03-23

Magnetically permeable core and inductive power transfer coil arrangement

#63
20170053735
2017-02-23

Shielded power coupling device

#64
20170047787
2017-02-16

Movable portion transmission system using wireless power transmission

#65
20170030160
2017-02-02

System and method for non-invasive power and data transmission

#66
20160235387
2016-08-18

Wireless data transfer in a deterministic rotating system

#67
20160211701
2016-07-21

Contactless rotary joint

#68
20160203906
2016-07-14

Inductive rotary transmitter

#69
20160181871
2016-06-23

Inductive rotary joint with multimode inverter

#70
20160181825
2016-06-23

Inductive rotary joint

#71
20160181791
2016-06-23

Inductive rotary joint with secondary safety circuit

#72
20160181013
2016-06-23

Inductive rotary joint with U-shaped ferrite cores

#73
20160065273
2016-03-03

Rotary transmitter for machine tools

#74
20160027576
2016-01-28

System and method for increasing coupling of an axle rotary transformer

#75
20160020662
2016-01-21

Static vacuum shafting device for integrated rotary transformer

#76
20150364968
2015-12-17

Drive mechanism for rotatably coupling a system part or a machine part

#77
20150333679
2015-11-19

Wound field synchronous machine with resonant field exciter

#78
20150280448
2015-10-01

Systems, apparatus, and methods for wireless power receiver coil configuration

#79
20150280447
2015-10-01

Multiplexed wireless power transmission system for moving component

#80
20150270059
2015-09-24

Electromechanical actuation and/or generation system including an electrical insulation between the electrical source and the load

#81
20150241248
2015-08-27

Brushless linear rotary transformer

#82
20150241199
2015-08-27

Resolver

#83
20150228406
2015-08-13

Rotary transformer and associated devices, systems, and methods for rotational intravascular ultrasound

#84
20150228405
2015-08-13

Rotary transformers for electrical machines

#85
20150228403
2015-08-13

Contactless power and data transfer

#86
20150206652
2015-07-23

Three-phase/two-phase rotary transformer including a scott connection

#87
20150145626
2015-05-28

Magnetically shielded three phase rotary transformer having three magnetic cores

#88
20150137924
2015-05-21

Magnetically shielded three-phase rotary transformer

#89
20150124509
2015-05-07

Three-phase/two-phase rotary transformer

#90
20150116067
2015-04-30

Three phase rotary transformer with free linked fluxes

#91
20150115762
2015-04-30

Rotating transformers for electrical machines

#92
20150108760
2015-04-23

Electrical power supply system comprising an asynchronous machine, and an engine fitted with such an electrical power supply system

#93
20150069852
2015-03-12

Transmission of signals through a non-contact interface

#94
20150054610
2015-02-26

Sensing transformer with pivotable and rotatable split cores

#95
20150054609
2015-02-26

Split core transformer with self-aligning cores

#96
20150043264
2015-02-12

Frequency converter

#97
20140352996
2014-12-04

APPARATUS AND METHOD FOR TRANSFERRING ELECTRICAL POWER TO A ROTATING SHAFT

#98
20140340185
2014-11-20

Rotary Connection for Electric Power Transmission

#99
20140333403
2014-11-13

High voltage electro inductive swivel

#100
20140295755
2014-10-02

Rotary transmitter for machine tools

#101
20140239737
2014-08-28

Electronic control device for controlling actuators

#102
20140239715
2014-08-28

Power delivery to a moving unit

#103
20140145811
2014-05-29

Transformer including a contactless signal connection

#104
20140139041
2014-05-22

Contactless power transfer system and method

#105
20140102202
2014-04-17

Rotary transformer for rotary ultrasonic testing apparatus and rotary ultrasonic testing apparatus using the same

#106
20140098929
2014-04-10

Non-contact rotary power transfer system

#107
20140085042
2014-03-27

Shielded power coupling device

#108
20140021795
2014-01-23

Contactless power transfer system

#109
20140002653
2014-01-02

Arrangement for wireless transmission of electrical signals in a motor vehicle

#110
20140001878
2014-01-02

Method and apparatus for contactless transmission of electrical energy between a wall and a door leaf fastened to this wall

#111
20130334894
2013-12-19

Device for transfer of electrical signals and/or electrical energy

#112
20130289412
2013-10-31

Rotary transformer and associated devices, systems, and methods for rotational intravascular ultrasound

#113
20130257214
2013-10-03

GLASS FIBER COMPOSITE MATERIAL FOR ELECTRICAL INSULATION

#114
20130234507
2013-09-12

Turning joint for electric excavator

#115
20130214614
2013-08-22

Contactless rotary joint

#116
20130187740
2013-07-25

Rotating power transformer

#117
20130181542
2013-07-18

Device for transmitting electric power from a wall to a wing fastened to said wall in a hinged manner

#118
20130154779
2013-06-20

Rotary transformer

#119
20130147201
2013-06-13

CONTACTLESS POWER TRANSFER DEVICE AND METHOD

#120
20130127580
2013-05-23

Shielded power coupling device

#121
20130101397
2013-04-25

Electrical power supply for equipment carried by a rotary support

#122
20130093294
2013-04-18

Integrated high frequency rotary transformer and resolver for traction motor

#123
20120280777
2012-11-08

EASILY INSTALLED ROTARY TRANSFORMER

#124
20120256482
2012-10-11

High power electrical distribution system

#125
20120242165
2012-09-27

METHOD AND DEVICE FOR TRANSMITTING ELECTRIC POWER FROM A WALL TO A LEAF HINGEABLY FASTENED TO SAID WALL

#126
20120218069
2012-08-30

High frequency rotary transformer for synchronous electrical machines

#127
20120198830
2012-08-09

Rotating hydrostatic transmision

#128
20120133468
2012-05-31

High voltage electro inductive swivel

#129
20120082288
2012-04-05

ARRANGEMENT FOR THE CONTACTLESS TRANSMISSION OF ENERGY AND CONTACTLESS TRANSMISSION OF DATA IN A COMPUTED TOMOGRAPHY SYSTEM

#130
20120069955
2012-03-22

Contactless power chain

#131
20120062217
2012-03-15

Resolver

#132
20120038308
2012-02-16

Rotating transformer for supplying the field winding in a dynamoelectric machine

#133
20120007708
2012-01-12

SOLID STATE ROTARY FIELD ELECTRIC POWER COGENERATION UNIT

#134
20120007442
2012-01-12

Rotary data and power transfer system

#135
20110291511
2011-12-01

Axial flux motor and generator assemblies

#136
20110285491
2011-11-24

Rotary transformer

#137
20110285490
2011-11-24

Electrical assembly for use with a rotary transformer and method for making the same

#138
20110234010
2011-09-29

Contactless power transfer system and method

#139
20110221555
2011-09-15

Electrical assembly and method for making the same

#140
20110198847
2011-08-18

Distributed electrical generation system

#141
20110141771
2011-06-16

ELECTRIC POWER SYSTEM INCLUDING POWER CONVERTER AND ROTARY TRANSFORMER AND METHOD OF ASSEMBLING SAME

#142
20110140429
2011-06-16

Systems for contactless power transfer

#143
20110133950
2011-06-09

Instrumented component for wireless telemetry

#144
20110133949
2011-06-09

Instrumented component for wireless telemetry

#145
20110121931
2011-05-26

Electrical assembly for use with a rotary transformer and method for making the same

#146
20110075796
2011-03-31

ROTARY POWER TRANSFORMER FOR USE IN A HIGH-VOLTAGE GENERATOR CIRCUITRY FOR INDUCTIVELY TRANSMITTING TWO OR MORE INDEPENDENTLY CONTROLLABLE SUPPLY VOLTAGES TO THE POWER SUPPLY TERMINALS OF A LOAD

#147
20110057758
2011-03-10

Wire winding device for a high power level transformer

#148
20110050377
2011-03-03

Rotary transformer

#149
20110038190
2011-02-17

Controlled contactless power transmission

#150
20110018667
2011-01-27

Transponder system

#151
20100225433
2010-09-09

Wire winding device for a high power level transformer

#152
20100207711
2010-08-19

Capacitive Signal Coupling Apparatus

#153
20100148505
2010-06-17

CONTACT-LESS POWER AND SIGNAL TRANSMISSION DEVICE FOR A HIGH POWER LEVEL TRANSFORMER

#154
20100066340
2010-03-18

Non-contact rotary power transfer system

#155
20100052941
2010-03-04

Electrical transmission between rotating and non-rotating members

#156
20090322173
2009-12-31

Electromagnetic machine with magnetic gap channels

#157
20090295523
2009-12-03

Rotating transformer

#158
20090280743
2009-11-12

DEVICE FOR THE WIRELESS TRANSMISSION OF SIGNALS BETWEEN TWO PARTS OF A PROCESSING MACHINE

#159
20090276199
2009-11-05

Inductive systems for non-contact transmission of electrical energy

#160
20090189459
2009-07-30

Contactless energy and data transmission device and method

#161
20090185658
2009-07-23

Contactless power and data transmission apparatus

#162
20090163817
2009-06-25

Rotary transformer

#163
20090153106
2009-06-18

Excitation device for an electric machine

#164
20090134812
2009-05-28

Exhaust fan for showing variable characters

#165
20090102590
2009-04-23

Underwater Electrically Insulated Connection

#166
20090085701
2009-04-02

Providing an inductive coupler assembly having discrete ferromagnetic segments

#167
20090085511
2009-04-02

High temperature superconducting electromechanical system with frequency controlled commutation for rotor excitation

#168
20090001817
2009-01-01

Single coil pair, multiple axis inductive power coupling apparatus and method

#169
20080311962
2008-12-18

Wireless terminals with integrated high speed serial communication hinges

#170
20080252336
2008-10-16

Non-Contacting Interrogation of System States

#171
20080211614
2008-09-04

Inductive rotary transfer device

#172
20080180279
2008-07-31

Rotational transmitter

#173
20080088400
2008-04-17

Inductive rotary joint comprising polymer material

#174
20070195924
2007-08-23

Computer tomograph with non-contacting energy transmission

#175
20070188284
2007-08-16

Shielded power coupling device

#176
20070132247
2007-06-14

Electric power generation system

#177
20070120634
2007-05-31

Rotary transformer

#178
20070080770
2007-04-12

Rotary transformer for transmission of electrical energy or information

#179
20070077783
2007-04-05

Rotary connector system

#180
20070040642
2007-02-22

Rotary transformer

#181
20070035883
2007-02-15

Methods and apparatus for communicating signals between portions of an apparatus in relative movement to one another

#182
20070024575
2007-02-01

Inductive rotating transmitter

#183
20070007857
2007-01-11

Generator

#184
20060209542
2006-09-21

LED based rotating beacon

#185
20060089009
2006-04-27

Slipring with a slide track formed as a closed circuit of electrically resistant material

#186
20060022785
2006-02-02

Power coupling device

#187
20050225188
2005-10-13

Method for the wireless and contactless transport of energy and data, and corresponding device

#188
20050217107
2005-10-06

Core structure of stator transformer for rotary transformer

#189
20050140483
2005-06-30

Transformer