We changed the voltage ratio by using different seriesparallel connections. Design, modeling, and analysis of a compact planar. Planar magnetics design for lowvoltage dcdc converters. The benefits of planar magnetics in of power conversion. Wire effective resistivity cm total rms winding current, ref to pri itot a desired turns ratios n2n1, n3n1, etc. A sample transformer is built to be tested in circuit before a production run is started. At first sight, to design a transformer and predict the current distribution between parallel layers, fem simulations can be used 2. The design of a multilayer planar transformer for a dcdc.
Esigw was introduced in for integrated horn antenna to use a thicker aperture than its planar. This guidebook is my attempt to clearly explain the materials, processes and design issues. Design inductor having a given inductance l, which carries worstcase current imax without saturating, and which has a given winding resistance r, or, equivalently, exhibits a worstcase copper loss of. High efficiency low losses, ultra compact, lowprofile. Sme planar magnetics design guide showcases a variety of standard sizes in patented planar transformer and inductor designs, which are tooled and ready for standex electronicss application engineering experts to customize for specific applications. Pdf highly efficient unpackaged 60 ghz planar antenna array. Several books are available in the market for transformer design.
For the love of physics walter lewin may 16, 2011 duration. Which is the best book to learn transformer designing. Chapter 14 inductor design university of colorado boulder. The transformer is one of the fi rst critical components in the. This book is a must for engineers working in magnetic design. Our worldleading design engineering team have developed custom planar transformers from 35w to 50kw in a single transformer component and inductors at 350a, as well as fully developing custom power converters utilising planar magnetics technology. There are original vintage loudspeakers from the 40s and 50s as well. The design of a multilayer planar transformer for a dcdc converter with a resonant inverter magdalena puskarczyk, radoslaw jez abb corporate research center, a starowislna st. Leakage inductance measured between pins 2 and 4 at 100 khz, 0. Transformer and inductor design handbook by william t. Planar magnetic components, such as planar transformers, can be employed to improve the power density, operating frequency, repeatability, functional integration and low profile of high frequency converters. In practice, planar transformers are quite complexwe studied one including 44 conductive layersso detailed description of shape and physical properties is time consuming.
I recommend for serious powerelectronics engineers, to obtain a copy of this excellent book, if for no other reason than to be current on planar and integrated magnetics, to have the winding proximity and skineffect loss theory worked out in one place for design, and on the advantageous incorporation of variable inductance in circuit design. Click here for a summary of our newest planar transformers and a detailed description for determining losses and overall efficiencies. The devices unique design can be optimized for customerspecific switching frequencies, input and output voltages, and current levels. Rated power 2kw6kw frequency range 40150khz topology full bridge, half bridge, full bridge zvs, pushpull current rating max. For this third edition, there is new material on subjects such as rotary transformer design, planar transform design, and planar construction. Planar transformers can be used in forward, pushpull, and full bridge half bridge topologies. He has also added several new subjects such as rotary transformer design, planar transformer design. In addition, he provides realworld, stepbystep design examples. One example of a vintage speaker is a large boxlike cabinet that was manufactured in the 1970s. Drawing out the tracks and checking tracespace clearance manually is a pain not to mention unreliable. Does anyone know of a decent repeatable way of making planar transformers planar inductors in altium. Calculating performance of planar magnetics 2 the transformer consisted of four windings having eight layers and 38 turns total. Xun li professor, department of electrical and computer engineering number of pages.
Using ferritic core, the inductance was increased for 22%. Topic 4 designing planar magnetics texas instruments. The pcb layout of the forward transformer is included. Strategies for optimizing planar design are presented, and illustrated with design examples. Planar transformer designers handle the current density in a different way. Expanded and revised to address recent industry developments, the fourth edition of this classic reference is reorganized and improved. The hybrid planar transformer series is available in surfacemount and throughhole configurations. With its practical approach to design, transformer and inductor design handbook, fourth edition distinguishes itself from other books by presenting information and guidance that is shaped primarily by the users needs and point of view. The book provides complete information on magnetic materials and core characteristics using stepbystep design.
The author covers magnetic design theory with all of the relevant formulas along with complete information on magnetic materials and core characteristics. When designing planar transformer pc windings, designers use the same technology used by the printed, circuit board designers, and that is the current rating for a given voltage drop and temperature rise. Planar transformer design in gan based llc resonant. Furthermore, for both transformer and inductors the required area product ap is proportional to the power flowing through the magnetic device.
Benyaakov, the benefits of planar magnetics in hf power conversion 3 that is, an increase in cross section area allows a proportional decrease in the number of turns. This document describes all the parts in the kit and provides information that covers assembling a prototype planar transformer or inductor. Expanded and revised to address recent industry developments, the fourth edition of this classic reference is reorganized and improved, again serving as a. Design and analysis of a high temperature superconducting. Planar transformers are devices used to exact standards with precise electrical characteristics such as capacitance, output, and aspect ratio. He has also added several new subjects such as rotary transformer design, planar transformer design, and planar construction. Standard part numbers are available of the shelf, and customized quickturn prototypes are available in a. The voltage v1 at the primary side of the transformers has a rectangle shape. From simulation work, it is found that e25066 material manufactured by avx could be the most suitable core for high frequency transformer design. This 15 page application note presents a fast and easy method to design planar transformers based on the ferroxcube range of planar e cores. Transformer and inductor design handbook, third edition. Transformer and inductor design handbook, fourth edition.
Transforming the future of power electronics planar. I took reference from the book a course in electrical machine design by a. Planar transformers are high frequency transformers used in isolated switchmode power supplies operating at high frequency. Thermal perspective the optimal design for transformers is normally set to be the balance of core and winding losses fig.
Whether you are working on high rel stateoftheart design or highvolume or lowcost production, this book is essential. The transformer was analyzed without the core and with the core. A compact planar transformer of a new design was analyzed in this paper. Design and practice design operation maintenance of core type oil filled. Chapter 20 planar transformers university of north. The rectangle voltage v1 causes a triangle shape for the magnetising current im. Complete designs for a forward and a flyback transformer are given. As opposed to conventional wirewoundonabobbin transformers, planar. Sme planar magnetics design guide standex electronics. Transformer and inductor design handbook, third edition by colonel wm. Inductance measured on an agilenthp 4284 between pins 2 and 4 at 200 khz, 0. Design of inductors and high frequency transformers.
Design of transformer by indrajit dasgupta pdf design of transformer indrajit dasgupta design of transformers indrajit dasgupta pdf design of transformers, indrajit dasgupta transformer design planar transformer design transformer engineering. But we must realize that this is a guide in the first step of an iterative process that may require us to change our. Transformer and inductor design handbook 4th edition. This is achieved by integrating the transformer directly into the pcb.
It is a very good book to take help for designing problem of machines. Superconducting quantum interference device squid magnetometers. Vintage speakers debuted in earlier decades, such as the 60s, 70s, and 80s. Transformer design constraints there will be five constraints on transformer design that will result in the formation of a transformer core k factor, k gfe. Beijing institute of technology, 1995 a thesis submitted in partial fulfillment of the requirements for the degree of master of science in the department of electrical and computer engineering in the college of engineering and computer science. Extensively revised and expanded to present the stateoftheart in the field of magnetic design, this third edition presents a practical approach to transformer and inductor design and covers extensively essential topics such as the area product, ap, and core geometry, kg. We will use the single factor k gfe to guide the design process. Planar magnetic devices offer several advantages over their conventional counterparts. After a transformer design proves successful, the design can be submitted to coilcraft. Design guide planar transformers inductors design guide. This paper discusses the magnetic fields within the planar structure and their effects on the distribution of high frequency currents in the windings. Design, modeling and simulation of planar waveguide time domain optical fourier transformer author. Transformers and inductors for power electronics wiley.
Inhouse the design engineer can adapt the different combinations of serial and parallel configurations of the windings to give a substantial number of ratio and current possibilities via the supplied software. Meanwhile, the cost, size and weight of the planar transformer can also be minimized compared to conventional wirewound transformers 46. Current sharing between parallel turns of a planar. Hassel, a large windingratio planar transformer with an optimized geometry for squid ammeter. Planar inductors are low profile and have exceptional current handing.
To keep the magnetising current im low, a magnetic core without an air gap is used. Expanded and revised to address recent industry developments, the fourth edition of this classic reference is reorganized and improved, again serving. Moreover, highly efficient unpackaged 60 ghz antenna array was designed for high gain purpose 62. Design guide planar transformers inductors design guide planar transformers inductors bus bar termination customize beyond these examples. Mclyman, 9780824753931, available at book depository with free delivery worldwide. I recommend for serious powerelectronics engineers, to obtain a copy of this excellent book, if for no other reason than to be current on planar and integrated magnetics, to have the winding proximity and skineffect loss theory worked out in one place for design, and on the advantageous incorporation of variable inductance in circuit. This causes an input current i1, which is the addition of the back transformed secondary current i2 and the magnetising current im see figure 5.
1354 422 147 1583 490 1202 1523 204 51 1369 1534 1283 1251 706 1270 1561 1231 830 1046 1046 1045 1258 421 1537 1581 1231 878 1240 1158 181 868 694 899 574 32 1250 543 1313 1251 659 1054 743 132 1262 731 379 792 621