| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 161 | Structure of transformer | US11456413 | 2006-07-10 | US07218199B1 | 2007-05-15 | Shih-Hsien Chang |
| A transformer includes a primary winding coil, a plurality of electrically-conductive sheets, a bobbin and a magnetic core assembly. The bobbin includes a first tube member, a second tube member and plural partition plates. The first tube member and the second tube member have a first channel and a second channel therein, respectively. Each partition plate is sheathed around the first tube member and the second tube member and includes a receptacle for accommodating respective electrically-conductive sheet, and the primary winding coil is wound around the second tube member. | ||||||
| 162 | Switching power circuit | US10527129 | 2004-08-13 | US07167384B2 | 2007-01-23 | Masayuki Yasumura |
| A switching power circuit in which a synchronous rectification circuit of the winding voltage detection system by use of a resistance device is provided on the secondary side of a compound resonance type converter, whereby a high power conversion efficiency can be obtained, and a reduction in the circuit scale through circuit simplification can be had. The gap length of an insulated converter transformer is enlarged to set the coupling coefficient at about 0.8, and the numbers of turns of the primary winding and the secondary windings are so set that the induced voltage level in the secondary winding is not more than 2 V/T. This causes the secondary-side rectified current to be in a continuous mode even under a heavy load condition by setting the magnetic flux density of the core in the insulated converted transformer to be not more than a predetermined value. Further, with inductors inserted into each rectified current circuit on the secondary side, the back electromotive forces in the inductors suppress a backward current generated in the rectified current, whereby a further reduction in the reactive power can be obtained. | ||||||
| 163 | Inverter transformer | US10560168 | 2004-06-03 | US20060279392A1 | 2006-12-14 | Hiroshi Shinmen; Masashi Norizuki |
| In an inverter transformer, a primary winding and a secondary winding are wound around each of a plurality of bar-shaped magnetic cores so that the primary and the secondary windings have respective predetermined leakage inductances. The primary windings are wound in such a manner that a magnetic flux generated in one magnetic core by a current flowing through a primary winding provided around the one magnetic core is directed opposite to a magnetic flux generated in another magnetic core adjacent to the one magnetic core by a current flowing through a primary winding provided around the adjacent magnetic core. | ||||||
| 164 | Device for supplying an electronic protection device to be used in a low-voltage circuit breaker | US10905150 | 2004-12-17 | US07145421B2 | 2006-12-05 | Federico Gamba; Severino Colombo; Francesco Casalinuovo |
| A supply device (1) for an electronic protection device to be used in a low-voltage circuit breaker. The supply device basically comprises a primary conductor (11), a secondary winding (12), a first magnetic circuit (10), and at least one second magnetic circuit (20). The first magnetic circuit (10) is such as to surround said primary conductor (11), which is related to a phase protected by the protection device; at the same time, the first magnetic circuit (10) constitutes the core of said secondary winding (12) that is used for supply of the protection device. The second magnetic circuit (20) is structurally separated from the first magnetic circuit (10), but is operatively connected thereto for subtracting part of the first magnetic flux generated within it by the current circulating in the primary conductor (11). | ||||||
| 165 | Switching power source apparatus | US10550654 | 2004-10-22 | US07130204B2 | 2006-10-31 | Mamoru Tsuruya |
| A switching power source apparatus can reduce the size of a transformer and realize the zero-voltage switching of a switch. The apparatus is compact, highly efficient, and low in noise. The apparatus has a series circuit connected to each end of a DC power source (Vdc1) and including a primary winding (5a) of a transformer (T) and a main switch (Q1), a rectifying-smoothing circuit to rectify and smooth a voltage that is outputted from a secondary winding (5b) when the main switch (Q1) is turned on, a series circuit connected to each end of the primary winding (5a) and including an auxiliary switch (Q2) and a clamp capacitor (C1), a series circuit connected to each end of the main switch (Q1) and including a diode (Dx1) and a snubber capacitor (Cx), a series circuit connected to a node between the diode (Dx1) and the snubber capacitor (Cx) and a node between the auxiliary switch (Q2) and the clamp capacitor (C1) and including an auxiliary winding (5x) and a diode (Dx2), and a control circuit (10) to alternately turn on/off the main switch (Q1) and auxiliary switch (Q2). When the main switch (Q1) is turned on, the snubber capacitor (Cx) is discharged through the auxiliary winding (5x) to the clamp capacitor (C1). When the main switch (Q1) is turned off, the snubber capacitor (Cx) is charged, to relax the inclination of a voltage increase of the main switch (Q1). | ||||||
| 166 | Transformer and voltage supply circuit thereof for lighting tubes | US10799065 | 2004-03-12 | US07116205B2 | 2006-10-03 | Ching-Fu Hsueh; Wan-Chin Hsu; Chih-Shin Huang |
| A transformer. The transformer drives a plurality of lighting tubes and comprises a coupling iron core, a first winding around the coupling iron core, a first bobbin disposed between the first winding and the coupling iron core, a plurality of second windings, independent of each other and respectively winding around the exterior of the first winding, wherein the second windings have the same winding number, and a second bobbin disposed between the first winding and one second winding. | ||||||
| 167 | Transformer for resonant inverter | US11030842 | 2005-01-06 | US20060145802A1 | 2006-07-06 | Yu-Lin Chung |
| A transformer for resonant inverter, which utilizes magnetic substances infilled between a primary coil and a secondary coil to compel part of the magnetic lines of force of the primary coil not to cross-link with the secondary coil, which thereby achieves regulating leakage inductance. Furthermore, need to renew an existing iron core and bobbin is eliminated, and surmounts the difficult problem of controlling leakage inductance in original configurational designs, thereby decreasing man-hours, enhancing efficiency, and saving on costs. | ||||||
| 168 | Full wave series resonant type DC to DC power converter with integrated magnetics | US10877058 | 2004-06-24 | US20050286270A1 | 2005-12-29 | Roumen Petkov; Gueorgui Anguelov |
| A full wave DC/DC converter magnetically integrates into the transformer assembly the functions of the resonant inductor, magnetizing inductor and the output filter inductor. The primary and the secondary windings are assembled on a gapped center leg of an E-core, while two output filter windings with an equal number of turns are assembled on gapped left and gapped opposed side legs of the E-core. The length of the gaps in the side legs is selected so that the DC current does not saturate the side legs. The two filter windings are connected in series and are oppositely polarized so that the voltages induced in these windings by the primary winding flux cancel each other. | ||||||
| 169 | Leakage transformer | US11133210 | 2005-05-20 | US20050219030A1 | 2005-10-06 | Tadayuki Fushimi |
| This is a small-size transformer that is made easily. Two bobbins around which a secondary coil is wound insert into bobbin protrusions from the opening surface side of the first core whereby the two bobbins are positioned in a row. A coiling protrusion around which to wrap a primary coil is formed in the aforementioned first core. Part of the primary coil coils around the coil protrusion and the remainder is positioned and coiled in a groove of the aforementioned first core provided in the outer circumference of the two bobbins. A second core is positioned in a countering position to the opening surface of the aforementioned first core so as to cover the aforementioned three protrusions. | ||||||
| 170 | Method and device for cooling high voltage transformer for microwave oven | US10418134 | 2003-04-18 | US06885268B2 | 2005-04-26 | Bu-Sik Choi |
| Disclosed are a method and a device for cooling a high voltage transformer for a microwave oven, in which the high voltage transformer is sealed so as to separate a coil and a core from the outside and to improve a cooling effect, and in which electric connection lines leading from the high voltage transformer are effectively treated and a fixed structure of a container for accommodating the high voltage transformer is improved so as to protect users of the high voltage transformer from dangers such as an electrical shock occurring in inspecting the microwave oven, thereby improving performance and quality of the microwave oven and the high voltage transformer. The method for cooling the high voltage transformer for the microwave oven comprises the steps of: inserting the high voltage transformer into a container with a designated size and sealing the container; injecting a cooling oil into the container so as to absorb heat of a high temperature generated from a coil and a core of the high voltage transformer; and cooling the cooling oil absorbing the heat by radiating the heat via the container exchanging the heat with the outside. | ||||||
| 171 | Switching power supply circuit | US10952425 | 2004-09-28 | US20050068792A1 | 2005-03-31 | Masayuki Yasumura |
| A switching power supply circuit is disclosed which can achieve a high power conversion efficiency and besides achieve reduction of the circuit scale and the cost by simplification in circuit configuration. The switching power supply circuit includes a synchronous rectification circuit of the winding voltage detection system on the secondary side of a resonance converter. The coupling coefficient of an insulating converter transformer or the induced voltage level per one turn of the secondary winding is set so that the magnetic flux density of the insulating converter transformer may be lower than a fixed level thereby to maintain the secondary side rectification current in a continuous mode even in a heavy load condition. An inductor is inserted in series in a path along which rectification current is to be supplied to a secondary side smoothing capacitor so that reverse current appearing on the rectification current is suppressed by counter electromotive force generated in the inductor to further reduce the reactive power. A dc superposition characteristic of the inductor is set so that abnormal oscillation in a very light load condition (for example, 12.5 W or less) is prevented. | ||||||
| 172 | Leakage transformer | US10448077 | 2003-05-30 | US20050007230A1 | 2005-01-13 | Tadayuki Fushimi |
| This is a small-sized transformer that is made easily. Two bobbins around which a secondary coil is wound insert into bobbin protrusions from the opening surface side of the first core whereby the two bobbins are positioned in a row. A coiling protrusion around which to wrap a primary coil is formed in the aforementioned first core. Part of the primary coil coils around the coil protrusion and the remainder is positioned and coiled in a groove of the aforementioned first core provided in the outer circumference of the two bobbins. A second core is positioned in a countering position to the opening surface of the aforementioned first core so as to cover the aforementioned three protrusions. | ||||||
| 173 | Method and device for cooling high voltage transformer for microwave oven | US10418134 | 2003-04-18 | US20030197583A1 | 2003-10-23 | Bu-Sik Choi |
| Disclosed are a method and a device for cooling a high voltage transformer for a microwave oven, in which the high voltage transformer is sealed so as to separate a coil and a core from the outside and to improve a cooling effect, and in which electric connection lines leading from the high voltage transformer are effectively treated and a fixed structure of a container for accommodating the high voltage transformer is improved so as to protect users of the high voltage transformer from dangers such as an electrical shock occurring in inspecting the microwave oven, thereby improving performance and quality of the microwave oven and the high voltage transformer. The method for cooling the high voltage transformer for the microwave oven comprises the steps of: inserting the high voltage transformer into a container with a designated size and sealing the container; injecting a cooling oil into the container so as to absorb heat of a high temperature generated from a coil and a core of the high voltage transformer; and cooling the cooling oil absorbing the heat by radiating the heat via the container exchanging the heat with the outside. | ||||||
| 174 | Leakage flux-type power conversion transformer | US10034112 | 2002-01-03 | US06593839B2 | 2003-07-15 | Kazuhiro Nakayama; Shigeo Abe |
| A conventional braided wire has high direct current resistance and high winding resistance in high-frequency regions, making it impossible to achieve a power conversion transformer having sufficient conversion efficiency. In the present invention, a braided wire is braided from three or more cluster wires, each comprising multiple strands, and is used as winding material for a leakage flux-type power conversion transformer. The braid pitch of the braided wire is set so that the ratio between one-turn winding length and the braid pitch is between 0.5 and 2.5. | ||||||
| 175 | Magnetron drive step-up transformer and transformer of magnetron drive power supply | US09762791 | 2001-07-09 | US06449178B1 | 2002-09-10 | Shinichi Sakai; Makoto Mihara; Kazuho Sakamoto; Toyotsugu Matsukura; Yohzoh Ishimura |
| A primary winding (1) and a secondary winding (2) are layered concentrically with a magnetic substance forming a main magnetic circuit (13) and the magnetic resistance of a subordinate magnetic circuit (14) placed between the primary winding (1) and the secondary winding (2) is adjusted, whereby a concentric multilayer winding transformer having an arbitrary coupling coefficient can be provided. | ||||||
| 176 | Leakage flux-type power conversion transformer | US10034112 | 2002-01-03 | US20020093410A1 | 2002-07-18 | Kazuhiro Nakayama; Shigeo Abe |
| A conventional braided wire has high direct current resistance and high winding resistance in high-frequency regions, making it impossible to achieve a power conversion transformer having sufficient conversion efficiency. In the present invention, a braided wire is braided from three or more cluster wires, each comprising multiple strands, and is used as winding material for a leakage flux-type power conversion transformer. The braid pitch of the braided wire is set so that the ratio between one-turn winding length and the braid pitch is between 0.5 and 2.5. | ||||||
| 177 | High leakage inductance transformer | US205976 | 1998-12-04 | US6100781A | 2000-08-08 | Hubert Raets; Manfred Albach |
| A transformer, particularly for a voltage converter, has a primary winding having a predeterminable leakage inductance and at least one secondary winding magnetically coupled to the primary winding with a predetermined voltage-transformation ratio. The (primary) leakage inductance is increased as compared with a conventional transformer without violating the limits for implementing an appropriately functioning transformer, and without choosing an additional coil or a larger core than is required for the power transformation, in that the primary winding comprises at least two winding sections whose magnetic couplings to the at least one secondary winding are implemented such that they operate in mutually opposite senses and are arranged such that they are at least substantially magnetically decoupled from one another. | ||||||
| 178 | Method and apparatus for an electromagnetic propulsion system | US853734 | 1997-05-09 | US5993164A | 1999-11-30 | Rodolfo E. Diaz |
| A method and apparatus to amplify the magnetic field in an electromagnetic circuit is provided. Amplification factors of several orders of magnitude may be obtained. The system is applicable to a number of different systems, including melt levitation and electromagnetic pumping and propulsion. One embodiment of the invention uses a non-conducting permeable core wound around a dielectric core. An alternating voltage source is connected to a solenoid which is wound around a section of the permeable core. The permeable core has a gap within which a flux concentrating cold crucible is provided. Melt levitation processing takes place within the cold crucible. A fluid redirection skirt having an intake port partially surrounds the gap and conducts fluid through an exhaust nozzle. | ||||||
| 179 | Method and apparatus for regulating voltage by utilizing the stable oscillation state of a parametric device | US3654546D | 1969-05-05 | US3654546A | 1972-04-04 | WANLASS LESLIE KENT |
| A METHOD OF REGULATING VOLTAGE BY TRANSFERRING ENERGY FROM AN UNREGULATED VOLTAGE SOURCE TO A PARAMETRIC DEVICE TO MAINTAIN IT IN ITS STABLE OSCILLATING STATE. A METHOD OF FILTERING EMPLOYING THE SAME PARAMETRIC PRINCIPLES IS ALSO DISCLOSED, AS ARE PARAMETRIC DEVICES IN WHICH A CAPACITOR IS COUPLED TO AN INDUCTOR TO FORM A RESONANT CIRCUIT, THE INDUCTANCE OF THE INDUCTOR BEING VARIED ELECTRICALLY AT TWICE THE FREQUENCY TO WHICH THE RESONANT CIRCUIT IS TUNED.
|
||||||
| 180 | Transformer with controlled low coupling | US3629741D | 1969-05-29 | US3629741A | 1971-12-21 | BRUNE WILLIAM L |
| A transformer having controlled low coupling between its windings. The transformer comprises a unitary core of ferromagnetic material, such as ferrite or carbonyl iron, fabricated in one piece with first and second pairs of apertures formed therein. A primary winding is threaded through the first pair of apertures and a secondary winding is threaded through the second pair of apertures. The coupling between these windings is controlled by means including a portion of the unitary core which is located between the two pairs of apertures. This provides completely closed magnetic paths in the core material for all the magnetic flux produced by driving either the primary or secondary windings.
|
||||||
QQ群二维码
意见反馈
意见反馈