         
On some entry fields and on some calculation results that need comments,the tooltips are placed.

	1. Reflected voltage is the voltage that is "reflected" from the secondary winding in the reverse stroke when energy is being transferred to the load.The reflected voltage is calculated by the output voltage through the transformation coefficient, as for a conventional transformer.
	2. The current density depends on the cooling conditions and on the dimensions of the core.
For free cooling, choose 4-6 A / mm2.
During ventilation, the current density can be selected more, up to 8 - 10 A / mm2.
Large current densities correspond to small cores.
For forced cooling, the permissible current density depends on the intensity of cooling.
We recommend making several calculations by changing the current density and analyzing the calculation results. Thus, you can choose the best option.
	3. Continuity of the current means that when transferring energy in the reverse direction, not all of the energy stored in the core is transferred, some part of the current remains in the inductance, and when the key is opened, this current, remaining unspent, immediately starts flowing in it. 0% corresponds to the breaking current. The value of continuity shows how much of the current amplitude remains unspent.

The program is designed for automated calculation of flyback transformers. The program allows you to reduce time and simplify design.
The user selects the desired series of magnetic cores and sets the initial data for calculation. The database of the program contains a series of magnetic cores offered by PC Mstator. By repeating the calculation for each series and comparing the results, the user can select the optimal series for their specific task.
	After analyzing the source data, the program automatically selects the necessary magnetic core of minimum weight, starting from the minimum size to the maximum.
For the selected magnetic core, the program selects the required number of wires and the number of turns in order to provide the required parameters. Thus, the program automatically optimizes the transformer for the price and minimum losses. In some cases, if it is practically not possible to scroll through the calculated turns of a wire of a given diameter, you should reduce the window fill factor in the source data and repeat the calculation of the project.

       The fill factor is set based on the possibility of winding. Typically between 0.35 and 0.45 (for manual winding).
The limit of the operating temperature of the transformer (taking into account the set maximum ambient temperature) is selected as the maximum for the selected series. In some cases, if such a transformer temperature is not desired, the user can set the desired expected temperature. The program will perform the calculation so as not to exceed it.
For critical cases, the developer has the opportunity to refine the project or optimize the transformer based on other tasks. For example, he can optimize the project for a minimum of total losses (maximum efficiency). To do this, in the “optimization” group, the user can, within small limits, change one of the parameters and see the result. So, changing the number of turns in one direction or another, it is possible in some cases to reduce the total loss.
In some cases, the desired result can be achieved by changing the size of the magnetic core obtained by the program to the previous (smaller) or next (larger) one. You can change the diameter of the wire to a small extent or calculate the design for the available wire.
The program contains a database of insulation thickness for PET-155 wire. For other brands, there may be slight differences. Calculation of the resistance of the winding is performed for domestic wires. For imported wires (AWG), the actual values ??of the resistance of the winding can be significantly higher.
	
	In all cases, a practical verification of the design with measurement of the actual operating temperature and verification of the required output characteristics is required.

The project refinement takes place in the "Optimization" group.
Automatic calculation is used when choosing a different core or when changing any source data (outside the "Optimization" group) to obtain a starting point for optimizing winding data.

In the "Optimization" group, when changing values ??using the arrows, the start of optimization occurs automatically. But if the new value is entered "manually", then optimization should be started with the same button.

	You can send the noticed errors, questions, comments and suggestions for the program to edf01@yandex.ru