This calculator is designed for calculation of parameters of various circuit solutions of power supply. His calculations are based on combined parametric circuits of the first and second kind and rather accurately reflect the phenomena occurring there. Also, the calculator can be used to study transients in parametric and non-parametric RL-circuits.

In addition to counting basic values: power taken from the oscillator G₁, the power obtained at the load R_n and the gain K_η2, the calculator displays 5 graphs: the current through a parametric inductance L₁, voltage on SW key_R, the moments of open and closed key SW_R, moments public and private key size_L and a voltage generator G₁. You can disable them and connect by clicking on the appropriate ticket under the schedule.

Conventional circuit design generated by the calculator parameters are shown in figures a and b. They are sharing:

• generator G₁, which can produce several types of signals: DC voltage, the classical sine and cosine, as well as rectified (half-wave rectified) sine and cosine;
• R load_n representing the resistance;
• key SW_R, which has two States: opened and closed. The calculator also takes into account the transition process between these States (t_front), and a non-zero resistance of the key in the open state (R_SWR);
• coil L₁, the value of inductance which varies parametrically with the second coil L₂ and the key size_L. In the diagram shown, but the calculator takes into account not only the inductance of the coil L₁, but the active resistance, which, in some cases, can strongly influence the output parameters;
• key size_Lthat needs to change the value of the inductor L₁. The calculator takes into account two States: opened and closed, and the transition process between these States (t_front). Its resistance is not considered, because no real constructive nothing is known about him.

The differences between the two schemes in that the first (Fig. a) is an exact connection of all elements, and the second (Fig. b) simplified. The second may be considered if the following condition: the resistance of open key SW_R much smaller than the load resistance R_n. In this case, the key is simply placed parallel to the load.

The important point is that the coil L₂ and the key SW_L on the scheme — rather conditional. Real circuit solutions is SW_L may be not only key, but a threshold element or a spark gap. For the mechanical option, instead of SW_L and L₂may be applied periodically passing L₁ ferromagnetic (magnetic) core. All of these points: the discovery of the threshold element, the breakdown spark gap or passage of the core, in the calculator named time's public key SW_L. It is important that during public key value of the inductance L₁ was reduced, while the private key back to the original value. In the calculator this ratio is entered in the field "Reducing the inductance when the open SWL".

By the way, to achieve gain greater than unity, it is not necessary to change the value of the inductor L₁. The same effect can be achieved at different coefficients for the curve Stoletov (k₁₂-k₂₃). But we'll cover that in a separate note.

The generator can be accessed in two ways: turning on and switching the switch SW_R. In the first case, it corresponds exactly to the diagram (Fig. a) and the second generator generates a signal only when the key SW_R open. In many cases, the second variant of inclusion gives a higher payoff, but requires a more complex generator. The differences between these options can be seen if you enable the "Schedule U_G1" and change the parameter "G₁ → Enable generator".

To make data entry easier and more intuitive display, the calculator will apply some relative values. For example, is made to enter time parameters key. Moving the yellow circles at the top of the charts, you can set the duration of the closure of the key and the time the private key in relative units. These parameters are automatically recalculated and displayed in absolute as t_front t and_impuls respectively. By the way, if the key semiconductor, the time t_front should approximately coincide with the corresponding value from the directory (datasheet), and if L is₂ and SW_L is used in a mechanical change of the inductance, for example by passing core, then as t_front will be time of discharge of the core from L₁ by a distance at which its inductance ceases to change. t_impuls in this case is the pause time between sets of serdecznie.

Approximately also introduced, and the early phase of the closure of the key, but its value is in degrees.

The time axis t on the main chart are also given in relative units. To convert it to absolute no sense, but, generally speaking, make it pretty easy: if the frequency of the oscillator to 1 kHz, the scale of the axis t is represented in milliseconds and at a frequency in the 1MHz — in microseconds. If the frequency G₁ set 0.001 kHz (1Hz), then the scale will be calibrated in seconds.

All the other quantities — current, voltage, inductance and resistance are presented as absolute values.

The withdrawal period is also presented in relative units and is selected from considerations of the period-end on the axis t. For example, if the period is clearly visible between the values: 1.2 and 2.2, then you need to enter values equal to: 1.2, 2.2, 3.2, etc. This approach improves the accuracy of the calculation of the actual output power and Kη₂.

Please note that increasing the period of withdrawal and increases in proportion to time of counting (server response).

This option allows you to change the number of opening and closings of the key for one period of the generator G₁. Usually, for parametric circuits optimum value is 2, but for completeness you can choose other values. Please note that selecting this option changes the rise time and the time of the private key.

This calculator allows to find the ratio of the increment of the amplifier , the efficiency of the second kind (Kη₂). But in the actual device for calculating the overall coefficient of performance (COP), you need to consider and the usual efficiency of individual units, for example, the efficiency of the master oscillator and the power supply. All of this is the efficiency of the first kind, the total value of which is in the range of 0.4 - 0.9, and that you can enter in the field η₁, where default is one. After you enter a value in this field, the overall efficiency will be recalculated to more real, which can now be called a COP for the entire device.

This calculator can save the results of calculations in to your account. For this you have to be registered on this website. You can save the result of the calculation, which is here called the word "draft" by clicking on "save to account", and then completely restore the data from the section "My projects".

To output a single query is solved by a rather complicated mathematical problem with application of systems of nonlinear differential and integral equations. Despite the optimization, the connection of multiple processors and a large volume operativnoy memory, its solution in real time takes a few seconds. All this requires a lot of computing power, which, unfortunately, are not free. Therefore, to use this calculator, we introduce a small monthly fee, which I hope will cover the costs of a powerful server.

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