Research website of Vyacheslav Gorchilin
2020-03-02
All articles/Experiments
Work current transformers on the bias currents. Here we will continue to develop the theme of practical implementation of pulse technology. In earlier experiments with short pulses and an inductor, we obtained some conditions under which power consumption from the power source does not depend on the load resistance . Further improvement of experiments in this direction have led the author to the circuit with a copper rail , along which, at some distance from each other, are several current transformers . While the load connected to them, does not affect the current consumption from the power source U1. . .
. For this were collected by the design pattern . Tire W0 is a fairly thick copper wire of length 0.5 m, such that it is freely prolazili in the hole current transformers TC0-TCn, the number of which can be, in principle, any. Current transformer [1] here is a ferrite ring with a toroidal winding which is placed on the bus. Winding parameters: number of turns, the magnetic permeability and the core dimensions, the author has intentionally chosen a different. While TC was completely different values of the inductance: 0 µh to 0 mH. . Bus connected to the circuit pattern , where the load current transformers used LEDs with a power of 0-3 W . And were also used to connect the load: the first without resonance , the second resonance . In the second case, in parallel to the coil TC, just installed a capacitor of such capacity that the entire circuit were in resonance with the frequency of excitatory impulses which produces GG0 at its output X2. There have been well-proven generator of short pulses. . If we consider this scheme from a classical perspective, it would represent the transformation of the current passing through the W0 bus. So this will work, and the load will affect the current consumption of the scheme as long as the duration of the stimulating pulses will be quite short. By the way, it turned out that this effect affects the slew rate of decline of the pulse. The author of the effect was observed at a pulse duration of 0 NS , up to 0 NS. When this value is exceeded, the scheme went on classic mode. . Non-classical operating mode is only observed when such a system is on the bias currents, where it will appear another the meaning and purpose of "current transformer". . Next, we consider the waveforms on some of TC. The frequency of the stimulating pulses is the same everywhere and amounts to 0 kHz, and the waveforms they see a yellow beam. The first of them represents the nonresonant amplitude at TC with inductance 0 µh, and all the other TC's located at the same bus inclusive with no load and without resonant capacitors. Here the interest is the pulse width, which is almost the same as that of the excitation pulse ~ 0 NS. .
. If loading the rest of the TC or at least, to enable the resonant capacitor, the first TC is changing, and its waveform becomes different . Here we see a complete response with damped oscillations of high frequency and increase in amplitude by 0 times. If you increase the supply voltage U1, the frequency of oscillation will also increase . When the connected load this effect remains: if the loading of the neighboring or adjacent TC, the led lights up even brighter. It is also interesting that in these experiments the oscillation frequency of the response is several megahertz, and it is more than an order of magnitude higher than the maximum frequency operation of these ferrites. . Here we can see another non-classical effect when neighboring nargusta not only reduces the amplitude, but rather more it increases. . Look at the waveform of another TC with a relatively high inductance 2.3 mH in the circuit of which is connected a resonance capacitor, and the entire LC-circuit is tuned in resonance with the frequency of stimulating pulses . In this case, the neighboring TC, with relatively low inductance, almost no influence on the amplitude, which in this case was 0 volts. Also, in the first half of a sine wave, we can observe slight emission of NMR. By the way, when you connect a load the amplitude of the pulses in the waveform is almost unchanged in form but is reduced in inverse proportion to its resistance. . Noticed the following pattern. If the inductance of TC is relatively small, it is better to use non-resonant type of load connection, i.e. without the capacitor. If the inductance of the TC is relatively large, it is optimal to turn on with load capacitor and the whole circuit to set the resonance. In addition, despite the fact that when working on the bias currents, any load does not affect the total consumption of the scheme, the mutual influence of neighboring TC is clearly observed: the TC with a larger inductance has a greater effect on TC with a smaller inductance. For example, if TC inductance of 2.3 mH, the load will affect the mode of operation of the TC with the inductance 0 µh, but not Vice versa. . Insights. Work current transformers on a common bus and the bias currents allows you to rebuild the load from the source. The task of designing real devices will be the most efficient conversion of the bias current in the normal current and voltage. One of the ways was demonstrated in this experiment. To improve the efficiency of such conversions, the author sees the following path: All this will allow you to design and create eco-friendly converters and power amplifiers with high efficiency. .  . 1 2 3 . .
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