Source: http://www.google.com/patents/US20100207714?ie=ISO-8859-1
Timestamp: 2014-07-12 03:38:12
Document Index: 105562802

Matched Legal Cases: ['art 111', 'art 112', 'art 111', 'art 112', 'art 312', 'art 312', 'art 312', 'art 312', 'art 312', 'art 312']

Patent US20100207714 - Transformer structure - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign in<nobr>Advanced Patent Search</nobr>PatentsA transformer includes a case, a magnetic device and a thermally conductive layer. The case has a receptacle. The magnetic device is disposed within the receptacle, and includes a winding member and a magnetic core assembly. The thermally conductive layer is arranged between the magnetic device and the...http://www.google.com/patents/US20100207714?utm_source=gb-gplus-sharePatent US20100207714 - Transformer structureAdvanced Patent SearchPublication numberUS20100207714 A1Publication typeApplicationApplication numberUS 12/624,930Publication dateAug 19, 2010Filing dateNov 24, 2009Priority dateFeb 13, 2009Also published asUS8120455Publication number12624930, 624930, US 2010/0207714 A1, US 2010/207714 A1, US 20100207714 A1, US 20100207714A1, US 2010207714 A1, US 2010207714A1, US-A1-20100207714, US-A1-2010207714, US2010/0207714A1, US2010/207714A1, US20100207714 A1, US20100207714A1, US2010207714 A1, US2010207714A1InventorsYu-Chun Lai, Po-Yu WeiOriginal AssigneeDelta Electronics, Inc.Export CitationBiBTeX, EndNote, RefManReferenced by (1), Classifications (4), Legal Events (1) External Links: USPTO, USPTO Assignment, EspacenetTransformer structureUS 20100207714 A1Abstract A transformer includes a case, a magnetic device and a thermally conductive layer. The case has a receptacle. The magnetic device is disposed within the receptacle, and includes a winding member and a magnetic core assembly. The thermally conductive layer is arranged between the magnetic device and the case for electrically isolating the magnetic device from the case. The heat generated by the magnetic device is transferred to the case through the thermally conductive layer and dissipated away to ambient air.
a case having a receptacle; a magnetic device disposed within said receptacle, and including a winding member and a magnetic core assembly; and a thermally conductive layer arranged between said magnetic device and said case for electrically isolating said magnetic device from said case, wherein the heat generated by said magnetic device is transferred to said case through said thermally conductive layer and dissipated away to ambient air. 2. The transformer according to claim 1 wherein said winding member is formed of a copper foil.
6. The transformer according to claim 1 wherein multiple bolt holes are formed in a first side plate of said case, and multiple fastening elements are penetrated through corresponding bolt holes for attaching a heat-dissipating device onto said first side plate of said case.
7. The transformer according to claim 6 wherein said heat-dissipating device includes a water cooling device or a heat sink.
8. The transformer according to claim 1 wherein said thermally conductive layer is a thermally conductive adhesive, which is filled between a gap between a inner wall of said case and said magnetic device to encapsulate said magnetic device within said receptacle and increase a heat transfer area of said magnetic device.
9. The transformer according to claim 1 wherein said thermally conductive layer is a thermal pad, which is attached between said magnetic device and said case for increasing a heat transfer area of said magnetic device.
a case having a receptacle; a magnetic device disposed within said receptacle, and including a primary winding assembly, a secondary winding assembly and a magnetic core assembly; and a thermally conductive layer arranged between said magnetic device and said case for electrically isolating said magnetic device from said case, wherein the heat generated by said magnetic device is transferred to said case through said thermally conductive layer and dissipated away to ambient air. 11. The transformer according to claim 10 wherein at least one of said primary winding assembly and secondary winding assembly is formed of a copper foil.
12. The transformer according to claim 10 wherein said primary winding assembly and secondary winding assembly further comprises a first pin and a second pin, respectively, and said first pin and said second pin are connected to a circuit board.
13. The transformer according to claim 12 wherein said transformer further includes a positioning plate having at least a first perforation and a second perforation corresponding to said first pin and said second pin, respectively, wherein said first pin and said second pin are respectively penetrated through said first perforation and said second perforation so as to be positioned by said positioning plate.
14. The transformer according to claim 10 wherein said case is made of a thermally conductive metallic material.
15. The transformer according to claim 10 wherein multiple bolt holes are formed in a first side plate of said case, and multiple fastening elements are penetrated through corresponding bolt holes for attaching a heat-dissipating device onto said first side plate of said case.
16. The transformer according to claim 15 wherein said heat-dissipating device includes a water cooling device or a heat sink.
17. The transformer according to claim 10 wherein said thermally conductive layer is a thermally conductive adhesive, which is filled between a gap between an inner wall of said case and said magnetic device to encapsulate said magnetic device within said receptacle and increase a heat transfer area of said magnetic device.
18. The transformer according to claim 10 wherein said thermally conductive layer is a thermal pad, which is attached between said magnetic device and said case for increasing a heat transfer area of said magnetic device.
FIELD OF THE INVENTION The present invention relates to a transformer, and more particularly to a transformer having enhanced heat-dissipating efficiency and reduced electromagnetic interference.
BACKGROUND OF THE INVENTION A transformer has become an essential electronic component for voltage regulation into required voltages for various kinds of electric appliances. Referring to FIG. 1, a schematic exploded view of a conventional transformer is illustrated. The transformer 1 principally comprises a magnetic core assembly 11, a bobbin 12, a primary winding coil 13 and a secondary winding coil 14. The primary winding coil 13 and the secondary winding coil 14 are overlapped with each other and wounded around a winding section 121 of the bobbin 12. An insulating tape 15 is provided for isolation and insulation. The magnetic core assembly 11 includes a first magnetic part 111 and a second magnetic part 112. The middle portion 111 a of the first magnetic part 111 and the middle portion 112 a of the second magnetic part 112 are embedded into the channel 122 of the bobbin 12. The primary winding coil 13 and the secondary winding coil 14 interact with the magnetic core assembly 11 for voltage regulation.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a transformer having enhancing heat-dissipating efficiency, so that the possibility of casing heat accumulation is reduced and the use life of the transformer is extended.
Please refer to FIG. 2A again. The magnetic device 21 includes at least one pin 213. An end of the pin 213 is connected to the winding member 211. The other end of the pin 213 is mounted on and electrically connected to a circuit board (not shown). For example, the primary winding assembly 211 a and the secondary winding assembly 211 b are electrically connected to the circuit board through a first pin 213 a and a second pin 213 b, respectively. As such, the primary winding assembly 211 a and the secondary winding assembly 211 b interact with the magnetic core assembly 212 to achieve the purpose of voltage regulation.
Please refer to FIG. 2B again. The pins 213 a and 213 b are bent by about 90 degrees and then extended in the downward direction. When the magnetic device 21 is disposed within the receptacle 222 of the case 22, the pins 213 a and 213 b are exposed outside the case 22. Since the pins 213 a and 213 b are flexible metallic sheets, the bending degrees of the pins 213 a and 213 b are readily shifted if the pins 213 a and 213 b are subject to an impact. Under this circumstance, the pins 213 a and 213 b are no longer aligned with corresponding insertion holes of the circuit board (not shown) and thus fail to be successfully mounted on the circuit board. For facilitating positioning the pins 213 a and 213 b, the transformer 2 further includes a positioning plate 23. The area of the positioning plate 23 is greater than the bottom area of the case 22. Corresponding to the pins 213, perforations 231 that have the same number as the pins 213 are formed in the positioning plate 23. After the magnetic device 21 is disposed within the receptacle 222 of the case 22, the pins 213 a and 213 b are penetrated through corresponding perforations 231 of the positioning plate 23, so that the pins 213 a and 213 b are initially positioned by the positioning plate 23. The resulting structure is shown in FIG. 2C. The use the positioning plate 23 can facilitate positioning the pins 213 a and 213 b. In addition, the positioning plate 23 can be used to support the case 22.
Please refer to FIGS. 2A, 2B and 2C again. The case 22 has a first side plate 223. Several bolt holes 223 a are formed in the first side plate 223 of the case 22. By penetrating fastening elements (e.g. screws) through corresponding bolt holes 223 a, another heat-dissipating device (e.g. a water cooling device or a heat sink) may be attached onto the first side plate 223 of the case 22. The heat generated by the magnetic device 21 is transferred to the case 22 through the thermally conductive adhesive 24 and then quickly dissipated away by the heat-dissipating device, so that the heat-dissipating efficiency is enhanced. Moreover, since the case 22 is made of a metallic material and the magnetic device 21 is shielded by the case 22, the electromagnetic interference generated by the transformer 2 is effectively suppressed. Under this circumstance, less number of filters (not shown) needs to be mounted on the circuit board and thus the circuitry layout of the circuit board is simplified.
FIG. 3 is a schematic exploded view illustrating a transformer according to anther embodiment of the present invention. As shown in FIG. 3, the transformer 3 principally comprises a magnetic device 31, a case 32 and a thermally conductive layer 33. The magnetic device 31 includes a winding member 311 and a magnetic core assembly 312. The winding member 311 is electrically connected to a circuit board (not shown) through at least two pins 313. The magnetic core assembly 312 includes a first magnetic part 312 a and a second magnetic part 312 b. The upper portion and the lower portion of the winding member 311 are partially sheltered by the first magnetic part 312 a and the second magnetic part 312 b, respectively. In addition, the middle portions of the first magnetic part 312 a and the second magnetic part 312 b are partially embedded into a channel (not shown) of the winding member 311. As such, the primary winding assembly 311 a and the secondary winding assembly 311 b interact with the magnetic core assembly 312 to achieve the purpose of voltage regulation. In this embodiment, the winding member 311 includes a winding frame 311 a. A winding assembly 311 b is wound around the winding frame 311 a. According to the practical requirements, the winding assembly 311 b is produced by circularly winding an enameled wire or a copper foil.
Referenced byCiting PatentFiling datePublication dateApplicantTitleWO2013030031A1 *Aug 20, 2012Mar 7, 2013Schmidhauser AgTransformer and associated production method* Cited by examinerClassifications U.S. Classification336/61International ClassificationH01F27/08Cooperative ClassificationH01F27/22European ClassificationH01F27/22Legal EventsDateCodeEventDescriptionNov 24, 2009ASAssignmentEffective date: 20090316Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LAI, YU-CHUN;WEI, PO-YU;REEL/FRAME:023564/0488Owner name: DELTA ELECTRONICS, INC., TAIWANRotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google