US3711747A - Power transformer primary winding fuse arrangement - Google Patents
Power transformer primary winding fuse arrangement Download PDFInfo
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- US3711747A US3711747A US3711747DA US3711747A US 3711747 A US3711747 A US 3711747A US 3711747D A US3711747D A US 3711747DA US 3711747 A US3711747 A US 3711747A
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- primary windings
- voltage
- power supply
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
Definitions
- ABSTRACT A power supply for use with different AC line voltages, which includes a power transformer having a plurality of separate primary windings and a corresponding plurality of fuses connected thereto.
- the primary windings are connected to each other in several different ways to change the turns ratio of the power transformer depending upon the value of the voltage supplied thereto.
- a predetermined voltage is produced in the secondary winding of the transformer irrespective of the value of the supplied AC line voltage and the current flowing through each of the fuses is held substantially constant, during normal operating conditions, regardless of the manner in which the separate primary windings are connected.
- This invention relates generally to powersupply devices, and particularly to power supply devices for supplying a predetermined voltage to a load and which is designed to work with commercial AC power lines of differing voltage.
- One method that has been used is to make the power transformer with a plurality of separate primary windings and to change the connections of these windings to alter the turns ratio between the primary and secondary of the transformer, in response to the line voltage supplied thereto, thereby obtaining a predetermined output voltage at the secondary winding.
- a fuse is interposed between the primary winding of the power transformer and the AC line for the protection of the apparatus and, when an abnormally high current flows therethrough, the fuse is broken to terminate the supply of power to the transformer.
- the primary windings are interconnected to match the value of the line voltage, the impedance of the primary also varies, so that the current normally flowing in the fuse varies depend ing upon the voltage of the line.
- the value of the current which will blow the fuse also varies with the line voltage employed, and consequently the load connected to the power supply cannot be sufficiently protected by a single, common fuse. Therefore, in the prior art, the fuse must be replaced, in accordance with the voltage of the AC mains employed, and, if the replacement of the fuse is forgotten, the load is likely to be, damaged if a fault condition occurs which is insufficient to blow the fuse, but which is high enough to damage the load.
- FIG. 1 is a diagram showing the construction of one example of a power supply according to this invention.
- FIGS. 2 and 3 are connection diagrams, for explaining the operation of the device shown in FIG. 1.
- FIG. 4 is a diagram showing the construction of a modified form of this invention.
- FIGS. 5, 6, 7, and 8 are connection diagrams, for explaining the operation of the device in FIG. 4.
- the power supply includes a power transformer comprising a plurality of primary windings having substantially the same number of turns, each of which is connected, at one end, to a first terminal, and at the other end to a second terminal through a fuse, and these terminals are selectively connected to one another to place the primary windings in parallel or in series, to thereby change the turns ratio of the transformer.
- FIGS. 1, 2 and 3 a detailed description will be given of one example of a power supply according to this invention and which is capable of working with two different line voltages, for example, 1 10V and 220V AC.
- reference numeral 1 indicates a load, such as a radio receiver, a television receiver, or the like, 2 a power transformer therefor, 3 a power switch, 5 a connecting plug to a commercial AC source and 6 some suitable means for selectively changing the interconnection of the primary windings of transformer 2.
- the primary winding 7 of the power transformer 2 is comprised of two independent primary windings 7a'and 7b, which are connected, at one end, to terminals t and t, of changing means 6, and at the other ends, to terminals t and t, of changing means 6 through a pair of fuses 9 and 10, respectively.
- the connecting plug 5 is connected to a terminal T and to a terminal T through the power switch 3.
- the number of turns on the secondary winding 8 of transformer 2 is suitably selected so that a predetermined output voltage is derived across the secondary winding 8 connected to the load 1.
- terminal T is connected to terminals t and t and terminal T is connected to terminals t and t.,, as shown in FIG. 2, by operating changing means 6 to provide a parallel connection of the two primary windings 7a and 7b, by which connection the turns ratio of the transformer 2 is increased to establish a predetermined voltage across the secondary winding 8.
- terminals T T and t are respectively connected to terminals t t and i as shown in FIG. 3, by similarly operating changing means 6 to connect the two windings 7a and 7b in series, thereby lowering the turns ratio of the transformer 2 to obtain the same predetermined voltage across the secondary winding 8.
- FIG. 4 shows another embodiment of this invention, in which the power supply device is adapted to be operable with four different commercial AC voltages, for example, 100V, 117V, 220V, and 240V.
- the power supply device is adapted to be operable with four different commercial AC voltages, for example, 100V, 117V, 220V, and 240V.
- FIG. 4 similar elements to those shown in FIG. 1 are identified by the same reference numerals and no further detailed description will be given.
- terminals t and z are connected to taps on the windings 7a and 7b, respectively.
- terminal T When plug 5 is connected to a commercial AC supply of 100V, terminal T, is connected to terminals 1 and t and terminal T is connected to terminals t and t,, as shown in FIG. 5, by operating the changing means 6, to derive a predetermined voltage across the secondary winding 8 of power transformer 2.
- plug 5 is connected to a power source of 117V
- terminal T is connected to terminals t
- t and terminal T is connected to terminals t and as shown in FIG. 6, to derive the same predetermined voltage from the secondary winding 8.
- terminals T, and T are connected to terminals r, and t respectively, and terminal t is connected to terminal t,,, as shown in FIG. 7, to again derive the same predetermined voltage from the secondary winding 8.
- terminals T, and T are connected to terminals 1, and t,,, respectively and terminal t is connected to terminal as shown in FIG. 8, to derive the same predetermined voltage on the secondary winding 8.
- the currents flowing in fuses 9 and 10 are substantially constant, irrespective of the line voltage supplied to plug 5, so that the same results obtained with the circuit of FIG. 1 can be obtained with the circuit of FIG. 4.
- a power supply for use with input voltages of differing magnitude comprising; a power transformer having a secondary winding and a plurality of separate primary windings, said primary windings being interconnected to supply a predetermined operating voltage to an external load; means for supplying a source of AC voltage to said plurality of primary windings; means for selectively changing the interconnection of said primary windings, to maintain said predetermined operating voltage when said source of AC voltage is of differing magnitude; and a plurality of fuse means, a separate one of said fuse means being connected, in series, between each of said separate primary windings and said changing means.
- each of said separate primary windings is provided with at least one intermediate winding tap.
- said changing means includes means for selectively changing the turns ratio of said power transformer to correspond to predetermined magnitudes of the AC voltage supplied to the primary windings, thereby providing a substantially constant voltage at the output of the power supply, irrespective of the magnitude of said AC voltage.
- a power supply for use with any one of a plurality of different AC input voltages, said power supply comprising; a power transformer having a secondary winding and at least two separate primary windings each having the same number of turns; means for supplying a source of AC voltage to said two primary windings; means for changing the connecting relationship between said two primary windings; and at least two fuse means respectively connected in series between each of said two primary windings and said changing means.
- each of said two primary windings has a terminal connecting to an intermediate tap on said winding.
Abstract
A power supply for use with different AC line voltages, which includes a power transformer having a plurality of separate primary windings and a corresponding plurality of fuses connected thereto. The primary windings are connected to each other in several different ways to change the turns ratio of the power transformer depending upon the value of the voltage supplied thereto. Thus, a predetermined voltage is produced in the secondary winding of the transformer irrespective of the value of the supplied AC line voltage and the current flowing through each of the fuses is held substantially constant, during normal operating conditions, regardless of the manner in which the separate primary windings are connected.
Description
United States Patent Sahara et a1.
POWER TRANSFORMER PRIMARY WINDING FUSE ARRANGEMENT Inventors: Hiroshi Sahara; Kiyoshi Yamakawa,
both of Tokyo, Japan Assignee: Sony Corporation, Tokyo, Japan Filed: Aug. 10, 1971 Appl. No.: 170,577
Foreign Application Priority Data Aug. 13,1970 j'a' an....1'...'i.." .."T..'..i'..;...4s'/so941 323/49 Int. Cl. ..H02h 7/04 Field of Search....323/48, 49, 43.5 R, 6; 307/17,
References Cited UNITED STATES PATENTS 11/1931 Ross ..323/49 ELECTRIC '1 APPARATUS 3,617,967 11/1971 Mitrach ..336/l47 3,084,308 4/1963 Porter ....3 17/14 R 1,291,078 l/l919 Moody ..323/49 Primary Examiner-Gerald Goldberg AttorneyLewis H. Eslinger et a1.
[57] ABSTRACT A power supply for use with different AC line voltages, which includes a power transformer having a plurality of separate primary windings and a corresponding plurality of fuses connected thereto. The primary windings are connected to each other in several different ways to change the turns ratio of the power transformer depending upon the value of the voltage supplied thereto. Thus, a predetermined voltage is produced in the secondary winding of the transformer irrespective of the value of the supplied AC line voltage and the current flowing through each of the fuses is held substantially constant, during normal operating conditions, regardless of the manner in which the separate primary windings are connected.
7 Claims, 8 Drawing Figures PATENTEDJAH 16 1915 SHEET 1 [IF 3 ELECTRIC APPARATUS p mvsmonfi A a W.0 M m m c v ml I S mm OW W M H L B PATENTEDJAN 16 1975 SHEET 2 OF 3 S CU mm R A ufm EA w A r w mmvlg AM M u WU.S
POWER TRANSFORMER PRIMARY WINDING FUSE ARRANGEMENT This invention relates generally to powersupply devices, and particularly to power supply devices for supplying a predetermined voltage to a load and which is designed to work with commercial AC power lines of differing voltage.
As is well known, different commercial AC line voltages, such as lOOV, 117V, 220V, 240V, and so on are employed in different countries, or in different localities in the same country. Accordingly, when radio receivers, television receivers, or the like, are used in localities where the commercial AC line voltages are different from one another, it is necessary to adjust the power supply in the device to correspond to the different line voltage so that a predetermined operating voltage is at all times obtained at the output of the power supply. For this purpose, a power transformer is usually employed to transform the voltage into said predetermined operating voltage and the transformation ratio of the transformer changed according to the value of the commercial line voltage. One method that has been used is to make the power transformer with a plurality of separate primary windings and to change the connections of these windings to alter the turns ratio between the primary and secondary of the transformer, in response to the line voltage supplied thereto, thereby obtaining a predetermined output voltage at the secondary winding. In this case, a fuse is interposed between the primary winding of the power transformer and the AC line for the protection of the apparatus and, when an abnormally high current flows therethrough, the fuse is broken to terminate the supply of power to the transformer. However, when the primary windings are interconnected to match the value of the line voltage, the impedance of the primary also varies, so that the current normally flowing in the fuse varies depend ing upon the voltage of the line. Accordingly, the value of the current which will blow the fuse also varies with the line voltage employed, and consequently the load connected to the power supply cannot be sufficiently protected by a single, common fuse. Therefore, in the prior art, the fuse must be replaced, in accordance with the voltage of the AC mains employed, and, if the replacement of the fuse is forgotten, the load is likely to be, damaged if a fault condition occurs which is insufficient to blow the fuse, but which is high enough to damage the load.
Accordingly, it is an object of the present invention to provide a power supply which supplies a predetermined operating voltage to a load, without fear of destruction thereof, irrespective of the AC line voltage used.
It is another object of the present invention to provide a power supply which has a power transformer whose turns ratio is capable of alteration in response to the line voltage supplied thereto, to thereby supply a predetermined operating voltage to a load, and which does not require replacement of the fuse supplied for the protection of the load, in accordance with the voltage employed.
It is still another object of the present invention to provide a power supply which has a power transformer whose turns ratio may be varied in response to the line voltage supplied thereto, to supply a predetermined operating voltage to a load, in which the current normally flowing in a fuse supplied for the protection of the load is held substantially constant, irrespective of the line voltage employed.
The above, and other objects, features and advantages of this invention will be apparent in the following detailed description of illustrative embodiments thereof which are to be read in connection with the accompanying drawings, wherein:
FIG. 1 is a diagram showing the construction of one example of a power supply according to this invention.
FIGS. 2 and 3 are connection diagrams, for explaining the operation of the device shown in FIG. 1.
FIG. 4 is a diagram showing the construction of a modified form of this invention, and
FIGS. 5, 6, 7, and 8 are connection diagrams, for explaining the operation of the device in FIG. 4.
In a first embodiment of the invention, the power supply includes a power transformer comprising a plurality of primary windings having substantially the same number of turns, each of which is connected, at one end, to a first terminal, and at the other end to a second terminal through a fuse, and these terminals are selectively connected to one another to place the primary windings in parallel or in series, to thereby change the turns ratio of the transformer. By this selective connection a constant voltage is obtained from the secondary winding of the transformer and a substantially constant current flows in the fuses, irrespective of the voltage of the AC mains connected to the transformer.
With reference to FIGS. 1, 2 and 3, a detailed description will be given of one example of a power supply according to this invention and which is capable of working with two different line voltages, for example, 1 10V and 220V AC.
In the Figures, reference numeral 1 indicates a load, such as a radio receiver, a television receiver, or the like, 2 a power transformer therefor, 3 a power switch, 5 a connecting plug to a commercial AC source and 6 some suitable means for selectively changing the interconnection of the primary windings of transformer 2. The primary winding 7 of the power transformer 2 is comprised of two independent primary windings 7a'and 7b, which are connected, at one end, to terminals t and t, of changing means 6, and at the other ends, to terminals t and t, of changing means 6 through a pair of fuses 9 and 10, respectively. The connecting plug 5 is connected to a terminal T and to a terminal T through the power switch 3. The number of turns on the secondary winding 8 of transformer 2 is suitably selected so that a predetermined output voltage is derived across the secondary winding 8 connected to the load 1.
In operation, if plug 5 is connected to a commercial AC voltage source of V, terminal T, is connected to terminals t and t and terminal T is connected to terminals t and t.,, as shown in FIG. 2, by operating changing means 6 to provide a parallel connection of the two primary windings 7a and 7b, by which connection the turns ratio of the transformer 2 is increased to establish a predetermined voltage across the secondary winding 8.
On the other hand, if plug 5 is connected to a commercial AC yoltage source of 220V, terminals T T and t, are respectively connected to terminals t t and i as shown in FIG. 3, by similarly operating changing means 6 to connect the two windings 7a and 7b in series, thereby lowering the turns ratio of the transformer 2 to obtain the same predetermined voltage across the secondary winding 8.
If the impedance of each of the windings 7a and 7b is taken as Z (the windings 7a and 7b are assumed to be identical with each other), and if the impedances of the fuses 9 and 10 are neglected because of their extremely small values, currents i, and i flowing in fuses 9 and 10, in the case where the line voltage is 110V, are given as follows:
While, when the line voltage is 220V, currents i and i flowing in the fuses 9 and 10, are given as follows:
Accordingly, i i i 11,, so that the currents flowing in fuses 9 and 10 are constant, irrespective of the voltage of the AC mains connected to the power supply.
Therefore, with this invention it is not necessary to replace the fuses in accordance with the line voltage employed, and, hence, the possibility of damage or destruction of the load which may occur if the user forgets to replace the fuse is completely avoided. FIG. 4 shows another embodiment of this invention, in which the power supply device is adapted to be operable with four different commercial AC voltages, for example, 100V, 117V, 220V, and 240V. In FIG. 4 similar elements to those shown in FIG. 1 are identified by the same reference numerals and no further detailed description will be given.
In the illustrated example, terminals t and z, are connected to taps on the windings 7a and 7b, respectively. When plug 5 is connected to a commercial AC supply of 100V, terminal T, is connected to terminals 1 and t and terminal T is connected to terminals t and t,, as shown in FIG. 5, by operating the changing means 6, to derive a predetermined voltage across the secondary winding 8 of power transformer 2. On the other hand, if plug 5 is connected to a power source of 117V, terminal T, is connected to terminals t, and t and terminal T is connected to terminals t and as shown in FIG. 6, to derive the same predetermined voltage from the secondary winding 8. Further, where plug 5 is connected to a power source of 220V, terminals T, and T are connected to terminals r, and t respectively, and terminal t is connected to terminal t,,, as shown in FIG. 7, to again derive the same predetermined voltage from the secondary winding 8. Further, when plug 5 is connected to a power supply of 240V, terminals T, and T are connected to terminals 1, and t,,, respectively and terminal t is connected to terminal as shown in FIG. 8, to derive the same predetermined voltage on the secondary winding 8. In the example shown in FIG. 4, the currents flowing in fuses 9 and 10 are substantially constant, irrespective of the line voltage supplied to plug 5, so that the same results obtained with the circuit of FIG. 1 can be obtained with the circuit of FIG. 4.
It should be noted that the foregoing examples are intended to be illustrative and do not limit the invention specifically thereto.
Although illustrative embodiments of this invention have been described in detail herein with reference to the accompanying drawings, it IS to be understood that the invention is not limited to those precise embodiments, and that various changes and modifications may be effected therein by one skilled in the art without departing from the scope or spirit of the invention.
What I claim is:
l. A power supply for use with input voltages of differing magnitude, said power supply comprising; a power transformer having a secondary winding and a plurality of separate primary windings, said primary windings being interconnected to supply a predetermined operating voltage to an external load; means for supplying a source of AC voltage to said plurality of primary windings; means for selectively changing the interconnection of said primary windings, to maintain said predetermined operating voltage when said source of AC voltage is of differing magnitude; and a plurality of fuse means, a separate one of said fuse means being connected, in series, between each of said separate primary windings and said changing means.
2. A power supply according to claim 1, wherein said separate primary windings each have the same number of turns.
3. A power supply according to claim 2, wherein each of said separate primary windings is provided with at least one intermediate winding tap.
4. A power supply according to claim 1, wherein said changing means includes means for selectively changing the turns ratio of said power transformer to correspond to predetermined magnitudes of the AC voltage supplied to the primary windings, thereby providing a substantially constant voltage at the output of the power supply, irrespective of the magnitude of said AC voltage.
5. A power supply for use with any one of a plurality of different AC input voltages, said power supply comprising; a power transformer having a secondary winding and at least two separate primary windings each having the same number of turns; means for supplying a source of AC voltage to said two primary windings; means for changing the connecting relationship between said two primary windings; and at least two fuse means respectively connected in series between each of said two primary windings and said changing means.
6. A power supply according to claim 5, wherein each of said two primary windings has a terminal connecting to an intermediate tap on said winding.
7. A power supply according to claim 6, wherein the primary windings are supplied with AC voltage through said changing means.
Claims (7)
1. A power supply for use with input voltages of differing magnitude, said power supply comprising; a power transformer having a secondary winding and a plurality of separate primary windings, said primary windings being interconnected to supply a predetermined operating voltage to an external load; means for supplying a source of AC voltage to said plurality of primary windings; means for selectively changing the interconnection of said primary windings, to maintain said predetermined operating voltage when said source of AC voltage is of differing magnitude; and a plurality of fuse means, a separate one of said fuse means being connected, in series, between each of said separate primary windings and said changing means.
2. A power supply according to claim 1, wherein said separate primary windings each have the same number of turns.
3. A power supply according to claim 2, wherein each of said separate primary windings is provided with at least one intermediate winding tap.
4. A power supply according to claim 1, wherein said changing means includes means for selectively changing the turns ratio of said power transformer to correspond to predetermined magnitudes of the AC voltage supplied to the primary windings, thereby providing a substantially constant voltage at the output of the power supply, irrespective of the magnitude of said AC voltage.
5. A power supply for use with any one of a plurality of different AC input voltages, said power supply comprising; a power transformer having a secondary winding and at least two separate primary windings each having the same number of turns; means for supplying a source of AC voltage to said two primary windings; means for changing the connecting relationship between said two primary windings; and at least two fuse means respectively connected in series between each of said two primary windings and said changing means.
6. A power supply according to claim 5, wherein each of said two primary windings has a terminal connecting to an intermediate tap on said winding.
7. A power supply according to claim 6, wherein the primary windings are supplied with AC voltage through said changing means.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8094170U JPS50497Y1 (en) | 1970-08-13 | 1970-08-13 |
Publications (1)
Publication Number | Publication Date |
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US3711747A true US3711747A (en) | 1973-01-16 |
Family
ID=13732489
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US3711747D Expired - Lifetime US3711747A (en) | 1970-08-13 | 1971-08-10 | Power transformer primary winding fuse arrangement |
Country Status (6)
Country | Link |
---|---|
US (1) | US3711747A (en) |
JP (1) | JPS50497Y1 (en) |
CA (1) | CA936231A (en) |
DE (1) | DE2140034A1 (en) |
FR (1) | FR2102247B1 (en) |
GB (1) | GB1351008A (en) |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3855521A (en) * | 1972-05-24 | 1974-12-17 | Sony Corp | Transformer having switch means for causing series or parallel connection between plural primary or secondary winding |
US3938031A (en) * | 1974-09-03 | 1976-02-10 | Robicon Corporation | Adjustable voltage power supply |
US4151575A (en) * | 1977-03-07 | 1979-04-24 | Hogue Maurice A | Motor protective device |
US4249696A (en) * | 1979-05-11 | 1981-02-10 | Emerson Electric Co. | Charging circuit for battery in thermostat with battery operated timer |
US4678986A (en) * | 1982-05-25 | 1987-07-07 | Louis Barthelemy | Electric transformer with selectively energized modular circuits |
US5319854A (en) * | 1991-05-28 | 1994-06-14 | Pracht Guenther | Scissors |
US6212430B1 (en) | 1999-05-03 | 2001-04-03 | Abiomed, Inc. | Electromagnetic field source with detection of position of secondary coil in relation to multiple primary coils |
US6496563B1 (en) | 1999-09-27 | 2002-12-17 | Christopher M Bacon | X-ray tube driver |
US20050140336A1 (en) * | 2003-12-26 | 2005-06-30 | Fuji Jukogyo Kabushiki Kaisha | Voltage equalizer for battery elements |
EP2551862A1 (en) * | 2011-07-29 | 2013-01-30 | AEG Power Solutions B.V. | Power supply assembly with means for increasing voltage |
US8620447B2 (en) | 2011-04-14 | 2013-12-31 | Abiomed Inc. | Transcutaneous energy transfer coil with integrated radio frequency antenna |
US8766788B2 (en) | 2010-12-20 | 2014-07-01 | Abiomed, Inc. | Transcutaneous energy transfer system with vibration inducing warning circuitry |
JP2014123539A (en) * | 2012-11-26 | 2014-07-03 | Panasonic Corp | Induction heating apparatus and rice cooker using the same |
US20140285302A1 (en) * | 2013-03-19 | 2014-09-25 | Munsu SIN | High voltage transformer |
US9002469B2 (en) | 2010-12-20 | 2015-04-07 | Abiomed, Inc. | Transcutaneous energy transfer system with multiple secondary coils |
US9002468B2 (en) | 2011-12-16 | 2015-04-07 | Abiomed, Inc. | Automatic power regulation for transcutaneous energy transfer charging system |
US9220826B2 (en) | 2010-12-20 | 2015-12-29 | Abiomed, Inc. | Method and apparatus for accurately tracking available charge in a transcutaneous energy transfer system |
CZ305925B6 (en) * | 2015-04-20 | 2016-05-04 | České vysoké učení technické v Praze, Fakulta dopravní | Circuit arrangement of transformer source with large input range |
US20160307695A1 (en) * | 2014-03-19 | 2016-10-20 | Ionel Jitaru | Magnetic structures for low leakage inductance and very high efficiency |
US9673716B2 (en) * | 2015-06-26 | 2017-06-06 | Lite-On Technology Corp. | Resonant converter with three switches |
US11448687B2 (en) * | 2016-08-17 | 2022-09-20 | Ge Aviation Systems Limited | Method and apparatus for detecting an electrical fault in a printed circuit board |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2326608C2 (en) * | 1973-05-24 | 1985-05-02 | Sony Corp., Tokio/Tokyo | Easily adjustable AC voltage adaptor - has rotary switch for selective tapping of transformer to give standard AC output |
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US1831886A (en) * | 1929-11-11 | 1931-11-17 | Julian J Ross | Transformer |
US3084308A (en) * | 1960-01-05 | 1963-04-02 | Hewlett Packard Co | Electrical apparatus |
US3617967A (en) * | 1970-04-14 | 1971-11-02 | Electromagnetic Ind Inc | Current transformer having primary side switchable to different measuring ranges |
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FR1447120A (en) * | 1961-11-08 | 1966-07-29 | Further development of voltage distributors |
-
1970
- 1970-08-13 JP JP8094170U patent/JPS50497Y1/ja not_active Expired
-
1971
- 1971-08-09 GB GB3732571A patent/GB1351008A/en not_active Expired
- 1971-08-10 US US3711747D patent/US3711747A/en not_active Expired - Lifetime
- 1971-08-10 DE DE19712140034 patent/DE2140034A1/en active Pending
- 1971-08-12 CA CA120401A patent/CA936231A/en not_active Expired
- 1971-08-13 FR FR7129716A patent/FR2102247B1/fr not_active Expired
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Publication number | Priority date | Publication date | Assignee | Title |
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US1291078A (en) * | 1915-02-27 | 1919-01-14 | Gen Electric | Method and means for the operation of electrical apparatus. |
US1831886A (en) * | 1929-11-11 | 1931-11-17 | Julian J Ross | Transformer |
US3084308A (en) * | 1960-01-05 | 1963-04-02 | Hewlett Packard Co | Electrical apparatus |
US3617967A (en) * | 1970-04-14 | 1971-11-02 | Electromagnetic Ind Inc | Current transformer having primary side switchable to different measuring ranges |
Cited By (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3855521A (en) * | 1972-05-24 | 1974-12-17 | Sony Corp | Transformer having switch means for causing series or parallel connection between plural primary or secondary winding |
US3938031A (en) * | 1974-09-03 | 1976-02-10 | Robicon Corporation | Adjustable voltage power supply |
US4151575A (en) * | 1977-03-07 | 1979-04-24 | Hogue Maurice A | Motor protective device |
US4249696A (en) * | 1979-05-11 | 1981-02-10 | Emerson Electric Co. | Charging circuit for battery in thermostat with battery operated timer |
US4678986A (en) * | 1982-05-25 | 1987-07-07 | Louis Barthelemy | Electric transformer with selectively energized modular circuits |
US5319854A (en) * | 1991-05-28 | 1994-06-14 | Pracht Guenther | Scissors |
US6212430B1 (en) | 1999-05-03 | 2001-04-03 | Abiomed, Inc. | Electromagnetic field source with detection of position of secondary coil in relation to multiple primary coils |
US6366817B1 (en) | 1999-05-03 | 2002-04-02 | Abiomed, Inc. | Electromagnetic field source device with detection of position of secondary coil in relation to multiple primary coils |
US6400991B1 (en) | 1999-05-03 | 2002-06-04 | Abiomed, Inc. | Electromagnetic field source method with detection of position of secondary coil in relation to multiple primary coils |
US6496563B1 (en) | 1999-09-27 | 2002-12-17 | Christopher M Bacon | X-ray tube driver |
US20050140336A1 (en) * | 2003-12-26 | 2005-06-30 | Fuji Jukogyo Kabushiki Kaisha | Voltage equalizer for battery elements |
US7400114B2 (en) * | 2003-12-26 | 2008-07-15 | Fuji Jukogyo Kabushiki Kaisha | Voltage equalizer for battery elements |
US9002469B2 (en) | 2010-12-20 | 2015-04-07 | Abiomed, Inc. | Transcutaneous energy transfer system with multiple secondary coils |
US8766788B2 (en) | 2010-12-20 | 2014-07-01 | Abiomed, Inc. | Transcutaneous energy transfer system with vibration inducing warning circuitry |
US9220826B2 (en) | 2010-12-20 | 2015-12-29 | Abiomed, Inc. | Method and apparatus for accurately tracking available charge in a transcutaneous energy transfer system |
US8620447B2 (en) | 2011-04-14 | 2013-12-31 | Abiomed Inc. | Transcutaneous energy transfer coil with integrated radio frequency antenna |
CN102904456A (en) * | 2011-07-29 | 2013-01-30 | 安奕极电源系统有限责任公司 | Power supply assembly with means for increasing voltage |
EP2551862A1 (en) * | 2011-07-29 | 2013-01-30 | AEG Power Solutions B.V. | Power supply assembly with means for increasing voltage |
US9002468B2 (en) | 2011-12-16 | 2015-04-07 | Abiomed, Inc. | Automatic power regulation for transcutaneous energy transfer charging system |
JP2014123539A (en) * | 2012-11-26 | 2014-07-03 | Panasonic Corp | Induction heating apparatus and rice cooker using the same |
US20140285302A1 (en) * | 2013-03-19 | 2014-09-25 | Munsu SIN | High voltage transformer |
US20160307695A1 (en) * | 2014-03-19 | 2016-10-20 | Ionel Jitaru | Magnetic structures for low leakage inductance and very high efficiency |
CZ305925B6 (en) * | 2015-04-20 | 2016-05-04 | České vysoké učení technické v Praze, Fakulta dopravní | Circuit arrangement of transformer source with large input range |
US9673716B2 (en) * | 2015-06-26 | 2017-06-06 | Lite-On Technology Corp. | Resonant converter with three switches |
US11448687B2 (en) * | 2016-08-17 | 2022-09-20 | Ge Aviation Systems Limited | Method and apparatus for detecting an electrical fault in a printed circuit board |
Also Published As
Publication number | Publication date |
---|---|
FR2102247A1 (en) | 1972-04-07 |
DE2140034A1 (en) | 1972-02-17 |
GB1351008A (en) | 1974-04-24 |
FR2102247B1 (en) | 1976-05-28 |
JPS50497Y1 (en) | 1975-01-09 |
CA936231A (en) | 1973-10-30 |
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