Magnetic Builder is a useful magnetic design software. It is a tool for user to create his/her own magnetic component (inductor and transformer) by selecting different ferrite core, bobbin type and winding method. Engineering drawing will be automatically produced to reduce user work load.
ferrite core transformer design software free download
Magnetics design tools assist engineers in optimizing their Magnetics components. Targeted to specific applications, each software package offers a core selection routine and contains online Help to guide design engineers through the selection and optimization process. Additional references are included to assist with more involved designs.
This design utility aids the designer in specifying the optimum core based on a variety of different current sensing schemes; including Hall Effect devices, current transformers for switched mode power supplies, and traditional current transformers. Materials offered are Kool Mµ, MPP, ferrites, and strip wound core materials including 3% Si steel and Ni-Fe alloys.
After the initial optimization pass, the transformer screen lets you change any of the more than 20 design parameters, such as number of turns; wire gauge and type; number of parallel strands; gap length; layer insulation thickness; wrapper thickness and end margin lengths. The program will analyze your changes and immediately show the calculated results each time a parameter is altered. You can easily optimize and compare several designs using different core types and materials. Once the design is complete, the winding specification and a complete electrical performance summary can be displayed or printed.
An automatic design phase synthesizes the transformer or inductor. The user can then interact with Magnetics Designer to perfect the design. When acceptable results are achieved, an IsSpice4 model is generated for use in one of the template power supplies. This feature is available in the demo version of the Magnetics Designer program, which provides a limited number of windings and cores.
In electronics, a ferrite core is a type of magnetic core made of ferrite on which the windings of electric transformers and other wound components such as inductors are formed. It is used for its properties of high magnetic permeability coupled with low electrical conductivity (which helps prevent eddy currents). Because of their comparatively low losses at high frequencies, they are extensively used in the cores of RF transformers and inductors in applications such as switched-mode power supplies, and ferrite loopstick antennas for AM radio receivers.
Ferrites are ceramic compounds of the transition metals with oxygen, which are ferrimagnetic but nonconductive. Ferrites that are used in transformer or electromagnetic cores contain iron oxides combined with nickel, zinc, and/or manganese compounds. They have a low coercivity and are called "soft ferrites" to distinguish them from "hard ferrites", which have a high coercivity and are used to make ferrite magnets. The low coercivity means the material's magnetization can easily reverse direction while dissipating very little energy (hysteresis losses), at the same time the material's high resistivity prevents eddy currents in the core, another source of energy loss. The most common soft ferrites are:
There are two broad applications for ferrite cores which differ in size and frequency of operation: signal transformers, which are of small size and higher frequencies, and power transformers, which are of large size and lower frequencies. Cores can also be classified by shape, such as toroidal cores, shell cores or cylindrical cores.
Abstract:An efficient wireless power transfer (WPT) system is proposed using two self-resonant coils with a high-quality factor (Q-factor) over medium distance via an adaptive impedance matching network using ferrite core transformers. An equivalent circuit of the proposed WPT system is presented, and the system is analyzed based on circuit theory. The design and characterization methods for the transformer are also provided. Using the equivalent circuit, the appropriate relation between turn ratio and optimal impedance matching conditions for maximum power transfer efficiency is derived. The optimal impedance matching conditions for maximum power transfer efficiency according to distance are satisfied simply by changing the turn ratio of the transformers. The proposed WPT system maintains effective power transfer efficiency with little Q-factor degradation because of the ferrite core transformer. The proposed system is verified through experiments at 257 kHz. Two WPT systems with coupling efficiencies higher than 50% at 1 m are made. One uses transformers at both Tx and Rx; the other uses a transformer at Tx only while a low-loss coupling coil is applied at Rx. Using the system with transformers at both Tx and Rx, a wireless power transfer of 100 watts (100-watt light bulb) is achieved.Keywords: optimal impedance matching; ferrite core transformer; magnetically coupled resonance; wireless power transfer; impedance matching
The MAX1856 Switching FrequencyThe MAX1856 switching frequency can be varied from 100kHz to 500kHz based on the choice of resistor R4 in Figure 1. The switching frequency fsw is set by R4 as fsw = (5 1010)/R4.Transformer DesignHaving considered the main features of the MAX1856 that have a direct bearing on application circuit design parameters, we now focus on the flyback transformer design. In the following sections an iterative descriptive process is chosen rather than a purely mathematical technique. This is done to give the inexperienced designer a good feel for the function of the core and the air gap in a flyback transformer and the controlling parameters. In particular, the selection of the core, the selection of primary inductance and the selection of primary turns are areas considered in some detail.
Transformer Core SelectionA core appropriate for output power at the operating frequency is selected. Core materials used for flyback transformer construction include ferrite, Kool-Mu and powdered iron. Core loss in powdered iron is higher than in ferrite. At frequencies below 50kHz the minimum obtainable winding loss will normally exceed the core loss. However, at the higher frequencies of operation (>100kHz) the core loss is equally dominant. The core loss is also dependent on the flyback operation mode (continuous or discontinuous). Balancing core and winding losses, if possible, results in the most optimum design. Ferrite is normally chosen for core material in designs over 50kHz.The core area product (WaAc), obtained by multiplying the core magnetic cross-section area by window area available for winding, is widely used for an initial estimate of core size for a given application. A rough indication of the required area product is given by
Using properly installed and grounded shielded cables helps suppress EMIs. However, a ferrite core suppressor may also need to be installed on cabling as well. Ferrite cores come in different shapes. They attenuate any form of EMI emission and are often used either as a retrofit or for testing purposes when calculating ferrite core filter specifications and design requirements.
In some applications, EMI suppression can be achieved with a ferrite core transformer design. The transformer itself is constructed by using a magnetic core in which coil (inductor) windings are made on a ferrite core component.
A benefit of ferrite cores is their high resistance to high current. They also provide low eddy current losses over a range of frequencies. Factor in their high permeability, and you have the ideal solution for use in high-frequency transformers and adjustable inductors.
The next design step involves the transformer. There are many design decisions involved in choosing a transformer, such as the core material and core shape. When choosing the core material and shape, each option has its own specific advantages. For this example, the commonly used ferrite core in a double E shape was chosen (see Figure 3). 2ff7e9595c
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