ClassID:

201743

H01F30/04 - CPC Classification

Classification description:

Fixed transformers not covered by group having two or more secondary windings, each supplying a separate load, e.g. for radio set power supplies

Recent Application in this class:
#1
20250365830
2025-11-27

TRANSFORMER-BASED LIGHT-SOURCE DRIVING SYSTEMS

#2
20250140471
2025-05-01

IMPROVED LOW-EMI TRANSFORMER

#3
20240420886
2024-12-19

Electrical power transformer and electrical power transformation system

#4
20240274350
2024-08-15

TRANSFORMER AND METHOD OF GENERATING MULTIPLE MULTIPHASE OUTPUT SIGNALS

#5
20210281208
2021-09-09

Variable speed drive with secondary windings

#6
20210075331
2021-03-11

Electrical power distribution

#7
20200389049
2020-12-10

ELECTRIC POWER CONTROL APPARATUS AND DRIVE UNIT

#8
20200381176
2020-12-03

Transformer for a three-port voltage converter, three-port voltage converter and method for transmitting electrical power

#9
20200350117
2020-11-05

Magnetic integration of matrix transformer with controllable leakage inductance

#10
20200303953
2020-09-24

POWER RECEIVING SYSTEM AND POWER SUPPLY SYSTEM

#11
20200136518
2020-04-30

Transformer and LLC resonant converter having the same

#12
20200005995
2020-01-02

Electromagnetic device

#13
20190341186
2019-11-07

System of termination of high power transformers for reduced AC termination loss at high frequency

#14
20190184839
2019-06-20

Transformer apparatus for a charging station for electrically charging vehicles and having at least two charging points

#15
20190164686
2019-05-30

Electronic device and method for manufacturing electronic device

#16
20190043664
2019-02-07

Flyback power supply, inverter and electrically powered vehicle

#17
20190013140
2019-01-10

Winding module, hybrid transformer, module and circuit for DC-DC power conversion

#18
20180354820
2018-12-13

Electrochemical ion exchange treatment of fluids

#19
20180287407
2018-10-04

Superconducting magnet engine

#20
20180182540
2018-06-28

Electromagnetic device

#21
20180153500
2018-06-07

High-voltage device and medical-image diagnostic apparatus

#22
20180013354
2018-01-11

Transformer and switched-mode power supply apparatus

#23
20180013350
2018-01-11

Transformer and switched-mode power supply apparatus

#24
20170330772
2017-11-16

Plasma processing apparatus

#25
20170229236
2017-08-10

Current transformer

#26
20170200553
2017-07-13

Multi-pulse electromagnetic device including a linear magnetic core configuration

#27
20170054378
2017-02-23

Integrated magnetic component

#28
20160323943
2016-11-03

Systems and methods for powering a microprocessor from an isolated secondary side to enable off-line communication on an LED driver

#29
20160242248
2016-08-18

Voltage transformer meant for power supply for LED lamps

#30
20150311813
2015-10-29

Transformer connection apparatus

#31
20150061807
2015-03-05

Transformer

#32
20140369096
2014-12-18

Power conversion apparatus having two secondary winding groups

#33
20140266146
2014-09-18

Current distribution apparatus

#34
20140265884
2014-09-18

Electrical load driving apparatus

#35
20140253271
2014-09-11

Bi-toroidal topology transformer

#36
20140204632
2014-07-24

Bypassed cascaded cell converter

#37
20140016370
2014-01-16

Magnetic device and power converter employing the same

#38
20130157587
2013-06-20

Integrated circuit comprising an integrated transformer of the “BALUN” type with several input and output channels

#39
20130057164
2013-03-07

Inductive electronic module and usage of such

#40
20130020989
2013-01-24

AC-DC POWER CONVERTER AND DC CHARGING STATION THEREOF

#41
20120218070
2012-08-30

Insulating support flange for current loop system

#42
20120098633
2012-04-26

Transformer

#43
20120025605
2012-02-02

System having primary conductor and movable component for inductive movement along primary conductor

#44
20120007706
2012-01-12

High voltage transformer

#45
20110248813
2011-10-13

Transformer

#46
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

#47
20110043319
2011-02-24

PULSE TRANSFORMER

#48
20100301982
2010-12-02

HIGH FREQUENCY TRANSFORMER AND MULTI-OUTPUT CONSTANT CURRENT SOURCE WITH HIGH FREQUENCY TRANSFORMER

#49
20100284205
2010-11-11

Voltage transforming apparatus

#50
20100283571
2010-11-11

Electromagnetic apparatus using shared flux in a multi-load parallel magnetic circuit and method of operation

#51
20100270945
2010-10-28

Current-sharing transformer and power supply circuit having such current-sharing transformer

#52
20100214053
2010-08-26

Composite transformer

#53
20100164674
2010-07-01

COMBINED TRANSFORMER AND MULTI-LAMP DRIVING CIRCUIT

#54
20100149841
2010-06-17

Device for feeding back power

#55
20100134230
2010-06-03

TRANSFORMER WITH HIGH LEAKAGE INDUCTANCE

#56
20100102916
2010-04-29

Shared reactor transformer

#57
20100079233
2010-04-01

Planar transformer

#58
20100073970
2010-03-25

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

#59
20100060399
2010-03-11

Transformer

#60
20100033284
2010-02-11

RESONANCE TRANSFORMER AND POWER SUPPLY UNIT EMPLOYING IT

#61
20090322460
2009-12-31

HIGH-FREQUENCY SWITCHING-TYPE DIRECT-CURRENT RECTIFIER

#62
20090289755
2009-11-26

Transformer apparatus with shielding architecture and shielding method thereof

#63
20090251009
2009-10-08

Drive isolation transformer controller and method

#64
20090243776
2009-10-01

Multi-output transformer

#65
20090219124
2009-09-03

Transformer for multi-output power supplies

#66
20090195173
2009-08-06

Discharge lamp operating system

#67
20090160350
2009-06-25

Balance transformer and backlight apparatus

#68
20090146577
2009-06-11

Transformer, illuminating apparatus using the same, and display apparatus using the same

#69
20090129124
2009-05-21

Power supply for electrostatic precipitator

#70
20090128277
2009-05-21

Transformer

#71
20090109710
2009-04-30

Switching power supply unit

#72
20090066290
2009-03-12

Battery charger with high frequency transformer

#73
20090039998
2009-02-12

Transformer structure

#74
20090033242
2009-02-05

Coil component and display device using same

#75
20080298100
2008-12-04

Contactless power receiving unit and electronic device employing the same

#76
20080212341
2008-09-04

DC-DC converter and transformer

#77
20080186744
2008-08-07

Method and device for transforming and regulating a voltage signal

#78
20080186743
2008-08-07

DC transformer with an output inductance integrated on a magnetic core thereof and a DC/DC converter employing the same

#79
20080163475
2008-07-10

TRANSFORMER AND ASSOCIATED METHOD OF MAKING

#80
20080150664
2008-06-26

Power source for plasma device

#81
20080143277
2008-06-19

Transformer, backlight apparatus, and display apparatus

#82
20080143276
2008-06-19

Transformer and multi-lamp driving circuit using the same

#83
20080139131
2008-06-12

Switched impedance transformer for semiconductor circuits

#84
20080136351
2008-06-12

BACK LIGHT UNIT AND TRANSFORMER

#85
20080129227
2008-06-05

Discharge tube lighting circuit and electronic apparatus provided with the discharge tube lighting circuit

#86
20080117126
2008-05-22

PLASMA DISPLAY PANEL WITH IMPROVED POWER SOURCE UNIT

#87
20080101097
2008-05-01

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

#88
20080088403
2008-04-17

Inverter transformer

#89
20080079526
2008-04-03

LIGHT TUBE DRIVING CIRCUIT AND TRANSFORMER THEREOF

#90
20080068118
2008-03-20

Method for adjusting mutual inductance and a transformer that implements the same

#91
20080007382
2008-01-10

Transformer and associated method of making

#92
20070257762
2007-11-08

RIAA CORRECTION OF AUDIO SIGNAL WITH USE OF TRANSFORMER

#93
20070241854
2007-10-18

Voltage stress reduction in magnetics using high resistivity materials

#94
20070236316
2007-10-11

Leakage transformer

#95
20070159288
2007-07-12

Transformer structure

#96
20070159284
2007-07-12

Transformer having auxiliary winding coil for sensing magnetic flux balance and driving circuit using the same

#97
20070103952
2007-05-10

Booster transformer for driving magnetron and transformer unit having the booster transformer

#98
20070091519
2007-04-26

Power supply system

#99
20070046414
2007-03-01

Inverse phase converter

#100
20060290453
2006-12-28

Transformer

#101
20060181384
2006-08-17

Light tube driving circuit and transformer thereof

#102
20060164197
2006-07-27

Transformer winding structure

#103
20060109594
2006-05-25

Safety interface system

#104
20060097837
2006-05-11

Coil component

#105
20060091987
2006-05-04

Ignition coil with secondary winding center tap connected to shield

#106
20060087304
2006-04-27

Buck converter with high efficiency gate driver providing extremely short dead time

#107
20060076329
2006-04-13

Transformer module for a welder

#108
20060049903
2006-03-09

Pulse type transformer with increased coupling coefficient through configuration of plural primary windings

#109
20050243582
2005-11-03

DC transformer with an output inductance integrated on a magnetic core thereof and a DC/DC converter employing the same

#110
20050237143
2005-10-27

Transformer for switching power supply

#111
20050219031
2005-10-06

Method for RIAA correction of audio signal with use of transformer

#112
20050219030
2005-10-06

Leakage transformer

#113
20050145611
2005-07-07

Power source for plasma device

#114
20050077991
2005-04-14

Landscape lighting transformer having increased loading features

#115
20050068792
2005-03-31

Switching power supply circuit

#116
20050007230
2005-01-13

Leakage transformer

#117
20050006367
2005-01-13

Power source for high current welding

#118
20050006366
2005-01-13

Transformer module for a welder

#119
17161802
2022-06-21

Continuous load high power flyback converter

#120
14336440
2016-10-25

Method to detect uneven AC load or parallel load removal