Controlled magnetic permeability. Phase shift. Here we will continue on the control of magnetic permeability of ferrites with the aid of an electric field. But in this case we will use not one, but two of the generator, the output of the circuit is to not put the meter inductance and the load in the form of led matrix. As a result, we will have to phase shift fluctuations in load depending on the control voltage on the ferrite. . The scheme of experiment is presented in figure . GG0 — that emits short pulses to the ferrite core Fe . The second independent circuit consists of an inductance coil L0 wound on the core, GG0 — low-power of sinusoidal oscillations and HL0 led, 0-watt. In this experiment used a single core type — "fairytopia sausage" (), because the "ferrite ring" did not show acceptable results. But there was zadeystvovany a few different coils with different inductance, to confirm the stability of the effect. .
. The experimental procedure is the following. First, turn on the generator sinusoidal signal GG2, with settings being made by the contact of the coil L0 at resonance, what will svidetelstvovat the ignition of the led HL1. Here are very important two points. The resonant frequency of which should we get, should be the natural frequency of the coil, which is formed by its own capacitance and inductance. When you hit the resonance it is necessary to reduce the brightness of the led to a minimum — such that the led barely glowed. This is done by adjusting the amplitude of the output signal generator settings. . Next, connect the first independent contour , which creates an electric field in the ferrite core by applying short pulses. Frequency generators GG0 and GG0 should be the same, or differ by 0-5 Hz. Therefore, to achieve such accuracy, it is necessary to apply a digital generators with quartz stabilization of frequency. If this condition is met, then at a certain minimum supply voltage U1, the led will begin to blink with the difference frequency. Moreover, the upper peak of its brightness should exceed the mean value by several times. . Unique and even amazing phenomenon we will be able to detect if connect the dual-trace oscilloscope to the output X0 of the generator GG0 and parallel to the led HL0 . Flashing effect of led is happening not because of the addition of the amplitudes , and due to the phase shift of the oscillations in the coil L1!.
. For example, with a single-layer coil inductance of 3.1 mH, the author of the effect occurred at a frequency of 0 kHz. In this case, the supply voltage U0 was 0 V, and power consumption from it was about 0 mW. The amplitude values of the generator GG0 was 2, although the ignition of such a led is required a minimum of 0 V. the Waveform data captured in this way and recorded in different random points in time are shown in figures , where the green beam oscillations on the led, yellow — at the drain of the output transistor of the generator GG1. In figures shows the same waveforms, but the yellow beam, in this case, is mounted to the gate of the transistor. . Approximately the same results, but with different resonant frequencies were recorded for other katuscak, with another inductance. They were all wound in a single layer on the plastic frame turns to full fill it. The difference between them is in the thickness of the wire. . An interesting point is that the generator GG0 can be configured not only on resonance frequency, but in smaller. For example, to described above the resonance frequency of 0 kHz, the effect was manifested in the frequency of the generator GG0 in 0 kHz and 12.5 kHz. . Conclusions and circuitry. So we got phase parametric generator , fluctuations which can arise from vibrations of the source at one point and subtracted in the other. When the phase of the vibration source and the coil are the same, the power to the active load will be their sum will be maximum and when the phase is opposite the energy will be reflected back to the source, and the power at the load is minimal. But since the power depends on the amplitude squared, the incremental energy at the load will appear exactly at the time of coincidence of the phases. . From here directly follows the circuit solution shown in figure . You need one generator of rectangular pulses GG1, which is to operate the amplifier A0 and the delay unit DL1. Last need to change the delay time with relatively low frequency, e.g. 0 Hz, to the output it was possible to obtain industrial frequency. However, to obtain the last before the load is required high-frequency filter which is not shown in the diagram. With the delay line signal is supplied to the shaper short pulses of IF1, and the output switch SW1, and feeds these pulses to the ferrite Fe. By the way, short pulses which are fed to the core can be obtained in another way: by using high voltage and spark gap. The disadvantage of this approach is the complexity of the adjustment required delay . . . . .
Attention! The content of this page is paid. To gain access to paid content, you must log in and pay a monthly or yearly subscription, and then refresh this page. If you have not registered yet, then do it right now.