When designing inductor, we would like to keep magnetic flux density low, so that the core wouldnt saturate and core loss stay low. Download micrometals inductor design for power filter. These core selection procedures simplify the design of inductors for switching regulator applications. 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. An inductor is essentially a coil of wire around a core of air, powdered iron, ferrite, or ceramic. Dont overlook inductors in your designs innovation. For other inquiries regarding inductor design with magnetics ferrite cores, contact our applications engineers or submit a custom inductor design request. The new inductor has nearly zero spiking on the output when the mosfet in the supply switches. Magnetic builder is a useful magnetic design software. In order to increase the inductance value of an inductor, an iron core is placed inside it, so an iron core inductor is used. If the original inductor is iron core 16 or 18 ga in a fairly low sensitivity. Toroids look exactly like doughnuts and come in various diameters, thicknesses, permeabilities and types depending upon the frequency range of interest.
The resulting designs have been manufactured and the inductance and total loss of the inductors are determined by a resonant. You will need to use this information when designing an inductor. The micrometals inductor design calculator allows users to log in and select from two different inductor applications. The program accepts user defined design requirements in terms of required. This is obviously a great skill to learn as sometimes your design may call for a very accurate inductance that may be otherwise hard to find. Powder core materials for magnetic components in ganand.
Calculate and find the best inductor for your switcher topology. 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. Micrometals inductor design software has been updated on our new website with added features and topologies. Materials like iron and ferrite have higher relative permeabilities in the hundreds and thousands. Advantages of using a powdered iron core for an inductor. Magnetics inductor design tool is an aid to assist design engineers in selecting the optimum powder core mpp, high flux, kool m, xflux. Top click here to try online magnetics builder design tool now. To optimize both the magnetic property and mechanical strength of the. Tables on iron and ferrite cores are attached with important information. 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. Youtuber rimstarorg, aka hackadays own steven dufresne, shows how to make a diy inductor for a specific inductance. These come in two types, powdered iron toroids or ferrite toroids.
Wikipedia the symbols example design elements inductors was drawn using the conceptdraw pro diagramming and vector drawing software extended with the electrical engineering. At maximum load, the average inductor current will be 3. The design of an inductor also frequently involves consideration of the effect of its magnetic field on devices near where it is placed. The results can also be downloaded for closer analysis. The litzopt program optimizes litz wire stranding design to minimize the cost or power loss. Magnetics inductor design with magnetics ferrite cores. Inductor design two different types of core materials are commonly used for the inductor in a switching regulator powder cores and ferrite cores. For an iron core, a rough number to use is 100 though it really varies depending on the alloy.
Jun 25, 2019 in case you forgot, inductors oppose changes in current flow through them. Practical construction tips for coils using iron powder cores 58 kb. On the speedster example 18ga solid core on the 2mh and 18ga on the rest is fine. If the original inductor is iron core 16 or 18 ga in a fairly low sensitivity speaker, like my magnepans, than you can get some headroom out of going to larger gauge wire as long as you consider the dcr of the new piece. The online calculator uses the wire diameter to determine its length and the possibility of fitting it in the inner diameter of the toroid. Magnetic builder magnetic design software, inductor and. In iron powder cores saturation flux densities of more than 1 t can be utilized, depending on the material.
Design software overview custom built, excel based design software can be used for dcdc, pfc, inverter, other applications library includes all micrometals. Engineering drawing will be automatically produced. The ac inductor like a transformer, must support the applied voltage, vac. The dc resistance of the inductor must be less than 0. Find the perfect coupled inductor for sepic, zeta, or other. New software for privacy reasons it is necessary for previous users to reregister. Here is a comparison between the previous inductor id been using just a single winding on an iron core and the new, low. For evaluation of the program two iron powder core inductors with different core materials have been designed. If the original inductor is aircore, and larger gauge wire, dont bother. Select iron powder for cores with a t prefix such as the t502. Find the perfect coupled inductor for sepic, zeta, or other applications. Magnetic builder is a magnetic design software to design magnetic component, inductor,transformer, coil, with different ferrite or powder core material.
Micrometals inductor design software is a flexible userfriendly engineering tool that is intended to assist in the selection of powder cores as well as analysis of existing designs, software is webbased and free to access for registered users. In order to increase the inductance value of an inductor, an iron core is placed inside of it. As figure 1 illustrates, powder materials saturate gradually, and still maintain a useful, predictable inductance, even when the. Design of a power factor boost inductor, commonly referred to as a pfc choke. 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. Design of powder core inductors iea lund university. These numbers were developed by core suppliers to summarize dimensional and electrical. Micrometals helps engineers find and design faster with. The following approach can be chosen as a rough calculation. Magnetic component engineers can compare the core performance including. Inductance, l measured in henries, h, is the measure of a. Ferrite e cores and pot cores offer the advantages of decreased cost and low core losses at high frequencies.
Micrometals inductor software is a flexible user friendly tool designed to assist in the selection of iron powder cores. The program has additional plugins to calculate another manner of coils. Inductor software dedicated to design inductors mainly based on iron powder cores except. Higher inductance values and higher current levels imply a larger core size. People say that they leave the gap in order to keep the reluctance high. In case you forgot, inductors oppose changes in current flow through them. Power saturation is a non issue because you would cook the. Jun 12, 2017 design a coil for a specific inductance.
Inductance, l measured in henries, h, is the measure of a magnetic field created by a current flowing through a coil of wire. It is a tool for user to create hisher own magnetic component inductor and transformer by selecting different ferrite core, bobbin type and winding method. As the current rises or falls, the magnetic field around the inductor induces a voltage back into itself that opposes the changes. Gapped ferrite cores offer an alternative design option to powder cores.
The value of bmax is chosen to be less than the worstcase saturation flux density bsat of the core material. The new site has been completely redesigned to provide a comprehensive and easily searched collection of inductor core solutions and powerful design software. While the type of inductor chosen for a given system largely depends on the individual application, there are a number of advantages to be achieved with iron core inductors. In this work an inductor design program is developed. A power electronics converter design requires a filter inductor. As the current rises or falls, the magnetic field around the inductor induces a voltage back into itself that opposes the.
A database with thousands of cores, wide variety of materials and wire is. Includes links to micrometals inductor design software and micrometals rf design. The calculator accepts the following user defined design. Design software overview custom built, excel based design software can be used for dcdc, pfc, inverter, other applications library includes all micrometals materials, including iron powder, rf, sendust, mpp, hiflux, fesi, customize alloys library includes all micrometals size range of. Transformer bobbin and core selection involves interdisciplinary design and cost issues 52 kb.
Iron core inductor manufacturers agile magnetics, inc. Targeted to specific applications, each software package offers a core. Core loss increase due to thermal aging, figure 1, indicates that the t94 size toroid is the smallest core able to meet the energy storage requirements at 40c temperature rise. One can determine the smallest core size, assuming a winding factor of 50% and wire current carrying capacity of 500 circular mils per ampere. The inductor design software allows engineers to choose from several topologies. The program accepts user defined design requirements in terms of. We must also check the % saturation curves found in thecore loss increase due to thermal aging text to verify that this core will be.
The following design guide may also be downloaded as a pdf. The actual inductance at maximum output current that the inductor design will produce, expressed in mh if the core is at the. Design elements inductors iron core inductor diagram. Optimal inductor design and material selection for high. Common mode filter inductor design software zip, 1. The number of turns is calculated from faradays law, which states. These numbers were developed by core suppliers to summarize dimensional and electrical properties of ccores and are listed in their catalogs.
Magnetics designer software makes transformer and inductor design easy. The previous version of the software will be available for a limited time. M max powder cores, this design utility aids in core selection for dc output inductors. Ferysters online tool for designing transformers construction. Splitting the winding into sections like this dramatically reduces the capacitance.
The litzopt program optimizes litz wire stranding design to minimize the cost or power loss, for transformers or inductors. What is magnetic builder inductor and transformer design tool. Here is a comparison between the previous inductor id been using just a single winding on an iron core and the new, lowcapacitance inductor. Software for magnetics design here we present some design software you can download or run online. Plot the specifications, l vs i, and core losses of up to 6 inductors on the same graphs. Simple to work with and constructed in sizes with low spatial requirements, and offer easy options for any enclosure. The inductance value on the air core inductor depends on the number of spires turns, length, diameter, thickness of the spiral, etc. The software was run with the above design inputs, and the core material. Magnetic materials and their operating flux levels are given in chapter 2. Wikipedia the symbols example design elements inductors was drawn using the conceptdraw pro diagramming and vector drawing software extended with the electrical engineering solution from the engineering area of conceptdraw solution park.
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