SU604110A1 - Method of automatic tuning of frequency of self-sustained inverter loaded by series oscillatory circuit - Google Patents

Description

on capacitance. The effect of the difference of the values of the load elements of the load circuit on the controlled master generator of the control system, automatically adjusts the frequency of the KsiBcpiops to the frequency of the load loop.

At the same time, it is ensured that the power is higher than the maximum output power,

Prichalpalnoe otlich predosheshugo method from a known phase transition phase voltage output voltage and current transducer and the effect of the resulting voltage on the master oscillator, is that in the predshozhuyu method will consume spontaneously average voltages, and, on the other hand, it will be spontaneous at the same time, on average, the voltages will be spontaneously applied to the driving voltage of the reference oscillator. the difference of these values affects the frequency of the master oscillator of the control system by the inverter. In the actual implementation of the procedure, the functional and inherent scheme of the frequency auto-tuning system is simplified and its setup is simplified.

Fig. 1 is a diagram of the system of automatic frequency control, which works according to the proposed method}; Dependences of the same N and the output power of the frequency.

To the code of inverter 1 there is a serial oscillating circuit consisting of inductor 2 and collar capacitor 3. The voltage transformers 4 and 5 are connected to the induction and capacitive parts of the circuit, respectively, and their secondary windings are connected to rectifier bridges 7 and 7, which are included counter-sequentially. The two output terminals of the bridge connectors are interconnected, and from the other two the signal is fed to the input of the controlled master oscillator of the inverter control system 8. In Fig. 2, the resonant curves are shown: 9-output power of the serial scaffold, 10-voltage of the inductive part. And the voltage on the capacitive part of the oscillating load circuit, 12 krsh and a feedback loop.

When the output frequency of the inverter is equal to the resonant frequency of the load circuit, the voltage

HS of the inductive section 10 of the pasiio circuit to the voltage on the capacitive part J, the output of the torch's KHsejv power at the same time is maximal 1 (curve 9). When the frequency decreases, the voltage on the inductance becomes less than the voltage 1 sat of the capacitance, due to the decrease in the resistance and X c of the 6-U U and the increase in the resistance of the capacitance Xr1UySPrn by increasing the frequency of the voltage on the inductance of the resistor; Fits voltage on the tank. The 4 n 5 n transformers measured by the transformer are rectified using bridges 6 and 7 and, after subtracting the (algebraic) differential signal, they are fed to the input of a controlled master oscillator of the control system 8. The equal voltage at the output of bridges 6 and 7 (resonance case a) the output signal is zero. When the oscillating circuit is detuned, a positive or negative signal will be sent (depending on the sign of the frequency change) to the input of the master oscillator, under the influence of which the emptiness of the master oscillator changes, returning the system to resonance.

Claims (2)

1.Godin V.F., Busnko E.M. "System of automatic control of the mode of operation of the inverter M., Electrical Engineering, No. 1, 1976, pp.39-41. 2. Akodis MM and others. Auto-tuning of the frequency of the thyristor inverter when working with a mapped-capacitor converter, M., Electrical Engineering, № 1, 1972.