Inductor design two different types of core materials are commonly used for the inductor in a switching regulator powder cores and ferrite cores. The current load for power inductors can be calculated very accurately in terms of dc current load and ripple current load core losses using the manufacturers simulation software. Multilayer air core inductor calculator enter l, d, l and wire gauge all four are required to calculate multilayer inductor data. How to design a coil for a specific inductance that you need, including how to calculate the inductance and where to find an online inductance calculator. In transformer design, we need to insure that s core. Magnetic materials and their operating flux levels are given in chapter 2. Another method of variable inductor design is to increase or decrease the number of turns through movable contact on top of the windings. New software for privacy reasons it is necessary for previous users to reregister. The dc resistance of the inductor must be less than 0. The most common design of variable inductor is having a movable ferrite core. Magnetic builder magnetic design software, inductor and transformer design tool poweresim is a free webbased software providing power supply smps design, transformer design, magnetic design, loss analysis, thermal analysis, waveform analysis, mtbf analysis, bom building, dvt analysis and optimization of power supply smps. For an iron core, a rough number to use is 100 though it really varies depending on the alloy. Cylindrical coil inductor design equations formulas calculator.
You can easily design inductors using this application. Lecture 36 transformer and ac inductor odds and ends. A database with thousands of cores, wide variety of materials and wire is included, including a nonlinear saturable core spice model. Inductor design software 1 micrometals part number. The conductor used in these windings have no insulation so the core must be insulated, thus moving the contact on top of the turn will change the number of effective turns. Within single shot, it also could be hardened by a machined encircling inductor or a socalled encirclingnonencircling inductor.
Design and fabrication of inductors for induction heat. Measurements taken over a frequency range from 100 mhz to 5 ghz show good. W, smallest ratio 1016 comparing two cores with identical area products, ap, for the same design specification, the core with a minimum of window area will generate a minimum of fringing flux. Wirewound inductors, which allow relative motion of conductors due to electromagnetic forces, will exhibit fm distortion by the process of reactance modulation.
If calculating the area using the radius then include the core s radius plus the radius of the wire. Inductor design calculator solving for inductance given wire coil number of turns, core material permeability, coil area and average coil length. Preferred toroid winding technique fully wound or single layer. A typical design approach is to preselect the core shape. Dont overlook inductors in your designs innovation. The litzopt program optimizes litz wire stranding design to minimize the cost or power loss, for transformers or inductors. If s p s max then increase the size of chosen transformer core to meet thermal and electrical needs and specifications. Inductor design magnetics inductor design tool is an aid to assist design engineers in selecting the optimum powder core mpp, high flux, kool m, xflux, kool m max, and 75series for inductor applications, specifically switchmode power supply smps output filters, also known as dc inductors. Updated magnetics inductor design tool now available acal bfi uk. The online calculator uses the wire diameter to determine its length and the possibility of fitting it in the inner diameter of the toroid. The shapeopt page has more information, or you can proceed directly to run shapeopt online, or. How to design a coil for specific inductance youtube. A power electronics converter design requires a filter inductor. Core vendors such as tdk, magnetics, philips, thomson, micrometals.
H d diameter of the inductor coil inches l length of the indutor coil inches. Micrometals inductor design software has been updated on our new website with added features and topologies. Transformer design software integrated engineering software. This energy is 2 li2 stored as magnetic field energy, within the ferrite core. Find the perfect coupled inductor for sepic, zeta, or. Ferrite magnetic design tool tdk electronics tdk europe. The inductor design software allows engineers to choose from several. As this name implies, most of the current flowing through the inductor is dc, with some amount of ac ripple. Getting started design of an inductor for a buck converter.
This program will automatically calculate and display. Inductor design software optimized program service. As a result the level of the inductor q gives a good indication of the overall performance of the component, and it is a factor that is widely used within rf design. Magnetics inductor design tool is an aid to assist design engineers in selecting the optimum powder core mpp, high flux, kool m, xflux. Core design considerations and how micrometals free inductor software makes choosing the right core easy. A custom cad tool asitic is described, used for the analysis, design, and optimization of these structures. Inductor analyzer allows engineers to quickly analyze wound core designs using any. As this name implies, most of the current flowing through the inductor is dc, with some amount of ac ripple current noted as idelta included as well figure 1. Magamp core design, magnetic amplifiers, secondayr side regulator design, magnetic switch design. The shapeopt program optimizes the shape of an inductor winding to minimize winding losses, including adjusting the number of strands in a litz wire winding. L2i max 2 b max 2 rk u 108 cm5 choose a core which is large enough to satisfy this inequality see appendix d for magnetics design tables. The micrometals inductor design calculator allows users to log in and select from two different inductor applications. Magnetics designer software makes transformer and inductor design easy.
When using an inductor in a circuit where the q or quality factor is important its. We can enter micro henry, ohms, amperes, core shape, winding type, frequency, voltage, temperature and more settings. The output inductor design tool was created as a design tool, to assist you in your application designs of. There are just too many forms, magnetic core types, and winding configurations to know it all. Inductor design program inductor is a multifeatured design program for designing a wide range of inductive devices using a variety of gapping arrangements. Our computer software performs design and analysis for transformers and inductors. The curve at the top of page 40 indicates the t106 will require 217 ampereturns to produce 1266. This page deals purely with inductors or transformers which are intended to store energy or act as dc chokes. These numbers were developed by core suppliers to summarize dimensional and electrical properties of ccores and are listed in their catalogs. The following approach can be chosen as a rough calculation. Inductor current ratings the current load for power inductors can be calculated very accurately in terms of dc current load and ripple current load core losses using the manufacturers simulation software. The results can also be downloaded for closer analysis. It is difficult to recommend one material over the other since the designer must take into consideration factors such as cost, volume, size and space limitations, and winding capabilities.
Vldt l p 2 u a r n mlt k w of cuwire intheprimary r pcu i r 1 b core p 2 l 2 the ac inductor total loss has two components wire i2r loss and core loss. Coil32 is a free coil inductor calculator, that allows calculating. Ferrite magnetic design tool the mdt software allows applicationrelated parameters to be calculated for all available epcos ferrite cores and or materials. Micrometals inductor design tool micrometals arnold.
An inductor with certain inductance l and certain peak current i can be determined by the following calculation. We specialize in both books and software pertaining to magnetic component design and its application. At maximum load, the average inductor current will be 3. The area includes part of the coil, as shown in the diagram above. The value of bmax is chosen to be less than the worstcase saturation flux density bsat of the core material.
Here you can see the formulas that the calculator uses to calculate the inductance. The ac inductor like a transformer, must support the applied voltage, vac. Learn how to wind your own inductor using thick copper wire for a low resistance coil. H where, n number of turns, d inductor coil diameter, l inductor coil length. As an approximation, the effective separation between the windings includes of the height of each winding, as. Call us 440 2380700 optimized program service, llc. Toroidal transformer design program with application to inverter circuitry by james a. The inductance of an air core coil inductor can be also calculated using the below equation.
Using this free inductance calculator, you can calculate inductance of the following inductors. Note that when doing calculations for a coil with very thin wire as. The same goes for ferrite which can have value anywhere from 20 to 5000 but if youre at a loss as to what to use then is a rough compromise. Pronine electronics design multilayer air core inductor. The following is a design tool which calculates the inductance of an air core inductor. Jun 25, 2019 designing your own inductor inductor design is an ee specialty within a specialty. Magnetics builder design magnetic inductor and transformer tool. It provides access to their digitized material data including their graphical representations. Magnetics designer is a standalone software program for windows that designs all types of layer and sectorsplit bobbin wound transformers and inductors, and generates a corresponding spice model. Reluctance of the core legs is not shownit is so coupled inductor design 83 into each winding, tailing off from the center to the outer edges next to the core. The actual inductance at maximum output current that the inductor design will produce, expressed in mh if the core is at the. Inductors are simple in appearance but behind those seemingly basic designs are multiple iterations of calculations, considerations and tradeoff between performance, price and longevity. Oct 31, 2016 how to design a coil for a specific inductance that you need, including how to calculate the inductance and where to find an online inductance calculator. Design of inductors and high frequency transformers.
When designing inductors where there is a choice of cores, always pick the core with the smallest ratio. Moving the core along the winding will increase or decrease the permeability which affects the inductance of the inductance. A passive filter with inductors and capacitors is very effective in controlling the bandwidth of a circuit, eliminating harmonics or unwanted intermodulation distortion and noise. For example flyback transformers, boost or buck inductors, hysteretic constantcurrent inductors etc. Inductor q inductor quality factor electronics notes. For instance, the user specifies a group of cores from which the program then finds the optimum one. Mpl henrys 89 this equation shows that inductance is dependent on the effective length of the magnetic path, which is the sum of the air gap length, lg, and the ratio of the core mean length to the material permeability, mplum. The program operates on windows 95, 98, 2000, nt, xp, vista and windows 7,8 and 10. Updated magnetics inductor design tool now available. Ferroxcube software design tool sfdt 2010 assists design engineers in.
Since its multiplied by the rest of the formula, that means. Magnetics designer produces a complete transformer or inductor design based upon electrical specifications, including a winding sheet report and a spicecompatible model with parasitics. Targeted to specific applications, each software package offers a core selection. Some engineers may be able to design their own coils when theyre simple, but its a waste of time in most cases. The inductor design software allows engineers to choose from several topologies like power factor correction or ac inductor, collects all the pertinent electrical, thermal and mechanical inputs, and returns a wide range of solutions that can be sorted based upon key criteria. For an encircling inductor scanning or single shot, the current. The program has additional plugins to calculate another manner of coils. Design of a power factor boost inductor, commonly referred to as a pfc choke. The number of turns is calculated from faradays law, which states. Software for magnetics design here we present some design software you can download or run online.
The previous version of the software will be available for a limited time. N number of turns, d inductor coil diameter, l inductor coil length. Getting started design of an inductor for a buck converter the design space is specified in the tabs core and winding. Coil32 is a free inductance calculator for windows. Micrometals inductor design tool micrometals arnold powder. Magnetics inductor design software is an aid to assist design engineers in selecting the optimum powder core for inductor applications, specifically in switchmode power supply smps output filters, also known as dc inductors. Magnetic builder is a magnetic design software to design magnetic component, inductor,transformer, coil, with different ferrite or powder core material. Dear all what is the optimal software package free software is recommended to design the ferrite core inductors, which can be used in the power converters. Analysis, design, and optimization of spiral inductors and tra.