82results about How to "Increase leakage inductance" patented technology

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.

The invention provides a coupling inductor and a power converter. The coupling inductor comprises a magnetic core and at least two windings. The magnetic core comprises at least two first magnetic columns, at least one second magnetic column and two opposite magnet yokes. The at least two first magnetic columns and the at least one second magnetic column are arranged between the two opposite magnet yokes. The at least two windings are wound on the at least two first magnetic columns respectively. The at least two windings and the at least two first magnetic columns correspond in a one-to-one mode. According to the coupling inductor, by adding the second magnetic column between the two opposite magnet yokes, the leakage inductance of the coupling inductor is increased, and accordingly the requirement for system stability is met when the coupling inductor is connected into the power converter.

A transformer structure is proposed herein which includes a primary winding coil, a secondary winding coil, a bobbin module, and a magnetic core assembly. The magnetic core assembly is mounted within the bobbin module. The bobbin module includes a first winding window portion and a second winding window portion in which the first winding window portion allows the primary winding coil to be wound thereupon and the second winding window portion allows the secondary winding coil to be wound thereupon. Both of first winding window portion and the second winding window portion include a first lateral plate, and each couples or separate with each other by the first lateral plate, such that the primary winding coil and the secondary winding coil are separated with each other and the leakage inductance, and the safe distance of electrical security for the transformer is increased accordingly.

A transformer structure is provided. The transformer structure comprises at least one first winding frame, at least one second winding frame, a plurality of primary coil assemblies which are wound around the at least one first winding frame, a plurality of secondary coil assemblies which are wound around the at least one secondary winding frame, and an iron core assembly which is placed in the jacks of the at least one first winding frame and the at least one second winding frame. The at least one first winding frame has a plurality of primary coil areas, around which the primary coil assemblies are wound. The at least one second winding frame has a plurality of secondary coil areas, around which the secondary coil assemblies are wound.

A DC power source apparatus has a DC power source for supplying a DC voltage, a transformer, and a switching element connected to a primary winding of the transformer. The switching element carries out ON/OFF operations to convert the DC voltage from the DC power source into high-frequency power, which is transferred to a secondary winding of the transformer and is converted into a DC output voltage. The primary winding of the transformer consists of a first primary winding made of a plurality of winding layers and a second primary winding made of a plurality of winding layers. The first and second primary windings are connected in parallel. The first primary winding is arranged on an inner side of the secondary winding, and the second primary winding is arranged on an outer side of the secondary winding. A terminal of a winding layer farthest from the secondary winding among the winding layers of each of the first and second primary windings is connected to the switching element.

The invention discloses a LTCC-based planar transformer and a manufacturing method thereof. The method comprises the following steps: S1, preparing an upper substrate, a lower substrate and a plurality of middle substrates, which all employ an LTCC (Low Temperature Co-Fired Ceramic) material raw ceramic chip with the first magnetic conductivity; S2, forming a hole in at least one middle substrate;S3, manufacturing primary and secondary electrode patterns on the plurality of middle substrates, and performing the filling of the holes to form a plurality of electrode layers; S4, putting an LTCCmaterial with second magnetic conductivity in areas where the primary electrodes and the secondary electrodes of the plurality of electrode layers are mutually inducted and overlapped to form a plurality of filling electrode layers, wherein the second magnetic conductivity is greater than the first magnetic conductivity; S5, laminating the plurality of filling electrode layers, the upper substrateand the lower substrate, and carrying out glue discharging and sintering to form the LTCC planar transformer, in which the LTCC material with the first magnetic conductivity and the LTCC material with the second magnetic conductivity are co-fired and then tightly combined to form an intermediate magnetic conductivity material with the magnetic conductivity being between the first magnetic conductivity and the second magnetic conductivity. The coupling coefficient of a planar transformer can be effectively improved, and the primary leakage inductance and the secondary leakage inductance of theplanar transformer are reduced.

There are provided an electromagnetic interference filter and a method of manufacturing the same. The electromagnetic interference filter includes a base core including a first base core and a second base core facing the first base core, a leg core including first and second leg cores disposed between the first base core and the second base core, the first and second leg cores facing each other, a winding coil part including first and second winding coils wound around the first and second leg cores, respectively, and connected to a power supply, the first and second winding coils respectively providing magnetizing inductance and leakage inductance, and a central core disposed between the first and second cores to provide an inductance leakage path between the first and second base cores.

A small balancer coil for cold-cathode florescent lamps having sufficient shunt/balance effects, comprises a discharge lamp, a conductor located close to the discharge lamp, and two coils whose magnetic fluxes face each other. The magnetic fluxes generated in the coils face and cancel each other. Lamp currents of the discharge lamps are balanced by making the sum of the reactances of the mutual inductance of the balancer coil larger than the negative resistance of the discharge lamp. Section winding is applied to each coil of the balancer coil so as to maintain shunt and balance effects even in a small/flat balancer coil by making self-resonance frequency of each of the coils higher.