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Showing 1 to 20 of 23 for “"Litz Wire"”.
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Bead manipulation to enable electrically controlled wire braiding
Litz wire bundles are highly effective at enhancing the current carrying capacity and limiting the losses of electronic devices up to MHz frequencies due to the pattern in which the individual wires are braided in the bundle. However, the technology to fabricate Litz wire bundles at higher radio …
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Planar transformer isolated DC-DC Converter for Solid-State Transformer
… For the designs of planar magnetics, PCB based litz wire air-core planar inductor and PCB based litz wire planar transformer are proposed, analyzed, simulated and tested, which shows better performance than traditional solid rectangular winding ones. By applying the novel litz wire inductor and …
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High-frequency Power Conversion for Medium Voltage Power Electronics Interfaces
… for the transformer. However, the high-frequency Litz wire and compact size of the transformer make it challenging to achieve partial discharge-free operation, unlike traditional line-frequency transformers. To address these challenges and achieve both medium voltage insulation capability and high …
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Design of High-density Transformers for High-frequency High-power Converters
… accommodating resonant operating waveform and Litz wire windings are explored. Leakage inductance modeling for large-number-of-stand Litz wire windings is proposed. The optimal design procedure based on the models is developed.
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Investigation and Design of Integrated Magnetics in High-power High-frequency Soft-switching DC/DC Converters for Battery Charger Applications
… (PCB)-based windings instead of traditional Litz wire. This transition simplifies manufacturing, reduces cost and improves control over parasitic elements. Moreover, integrating resonant inductors into PCB-based transformers further reduces the total number of transformers and inductors …
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Design and implementation of a converter with wide operating range using a Variable-Inverter-Rectifier-Transformer structure
… improvement in a core loss. Moreover, a hybrid Litz-PCB construction of VIRT transformer is explored. This approach reduces copper loss and easily satisfies the voltage insulation requirements in such "off-line" applications (2.5 kV in this case [1]) through use of a triple insulated litz wire.
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Modeling, analysis, and design of high-frequency high-density low-profile power transformers
… balanced or unbalanced) with different types of wire (solid wire, Litz wire, and printed wire) are accurately predicted. An algorithm is developed to design a low-profile transformer that has a maximum power density and meets a given set of specifications. The maximum achievable power density for …
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High-Frequency Oriented Design of Gallium-Nitride (GaN) Based High Power Density Converters
… 10 kW LLC resonant converter with the integrated litz-wire transformer is designed, achieving 97.9 % efficiency and 131 W/in3 power density. The design consideration to build the novel litz-wire transformer operated at 400 kHz switching frequency is also presented. In all, this work focuses on …
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Magnetic and Thermal Design of Litzwire 500 kHz Highpower Planar Transformers with Converging Cooling Duct for “dc Transformer” Resonant Converter Applications
This work presents the design and analysis of two Litz wire transformers for a 500 kHz, 18 kW inputparallel outputseries partial power processing converter (IPOS PPP). Because the two power paths in the IPOS PPP operate as “dc transformers” (DCX), both transformers are designed with the goal of …
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The theory and design of switched-mode power transformers for minimum conductor loss
… winding types: single and multi-filar round wire, litz wire, and sheet conductors. Experimental results are presented and compared with the theoretical results for each of these cases. Finally, a design procedure is outlined for switched—mode pour transformers which is based on this work.
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Core loss characterization and design optimization of high-frequency power ferrite devices in power electronics applications
… models of winding losses for solid and litz wire is performed. The optimum design method for high-frequency power transformers and inductors is proposed.
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Super High-speed Miniaturized Permanent Magnet Synchronous Motor
… shown that slotless structure with multi-strand Litz-wire is favorable for super-high speeds and cryogenic applications. The design, simulation, and test of a single-sided axial flux pancake PMSM is presented. The advantages and disadvantages of this kind of structure are discussed, and further …
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Modeling and Design of Planar Integrated Magnetic Components
… exact analytical solutions. Then, a planar litz structure is presented. Some definitions and guidelines are established, which form the basis to design a planar litz conductor. It can be constructed by dividing the wide planar conductor into multiple lengthwise strands and weaving these …
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Heat Pipes for the Thermal Management of High Frequency Transformers in the Navy integrated Power Electronics Building Block
… conductivity values of the 3F36 ferrite and litz wire in the transformer. Then, a standalone thermal model of the transformer was built in StarCCM+ and used to test various cooling solutions, including forced airflow and heat pipe configurations. The proposed design utilized 16 copper-water …
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High Frequency Isolated Power Conversion from Medium Voltage AC to Low Voltage DC
… are introduced including core loss model and litz wire winding loss model. Transformer turn number is determined based on core loss and winding loss trade-off. Different core loss density and working frequency impact is carefully analyzed. Different materials show their best performance among …
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PCB-Based High-Power DC/DC Converters with Integrated Magnetics for Battery Charger Applications
… (PCB) technology for the windings as opposed to Litz wire implementations. Compared to traditional Litz wire-based transformers, the manufacturing process is significantly streamlined, and the management of parasitic is considerably more straightforward. Furthermore, the integration of resonant …
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EMI Noise Reduction Techniques for High Frequency Power Converters
… of high AC current in the inductor winding, litz wire was used to build the inductor. However, with coupled inductor concept and the proposed winding structure, CRM inductor is integrate into PCB winding for the first time. Furthermore, balance technique is applied to reduce CM noise for PFC …
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High Frequency Bi-directional DC/DC Converter with Integrated Magnetics for Battery Charger Application
… voltage-second. Compared with conventional litz-wire based transformer. The manufacture process is greatly simplified and the parasitic is much easier to control. In addition, the resonant inductors are integrated into the PCB transformer so that the total number of magnetic components is …
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Control, Analysis, and Design of SiC-Based High-Frequency Soft-Switching Three-Phase Inverter/Rectifier
… almost similar efficiency compared to that with litz-wire inductor and 14 to 18 dB CM noise reduction up to 15 MHz. Lastly, the soft-switching technique is extended to inverters in standalone mode. To meet tight ac voltage total harmonic distortion requirements, a current control in dq-frame is …
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PCB-Based Heterogeneous Integration of PFC/Inverter
… approach has a similar loss to a conventional litz wire-based design but features a higher power density and can be easily assembled in automation. A 3 kW high frequency PFC converter with 99% efficiency is demonstrated as an example. Furthermore, PCB-based designs up to 6 kW are provided. …
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