SU104229A1 - Shortwave or ultrashortwave tube generator - Google Patents

Description

The invention relates to short-wave or ultra-short-wave tube oscillators with self-excitation feeding the working (heating) installation condenser for heating dielectrics, and with smooth control of the operating mode of the generator and power (released in the heated material) by means of an adjusting capacitor of non-temporal capacitance included in the parallel ( relative to the generator lamp and the working capacitor) day.

The voltage Eo on the working capacitor C in such generators is determined from the relation:

  () Cgg + Ca "+ C

, WITH

where: 1 is the voltage supplied from the generator lamp; Cag and C - interelectrode capacitances of the lamp; C - capacity of the regulating capacitor; / Co is the feedback coefficient.

If the voltage at the SLIP1KOM operating capacitor is large, then to heat the dielectric a power greater than what the generator lamp is capable of producing is required. This leads either to a breakdown of the generator, or to work in

unfavorable under-voltage lamp with a very low efficiency. Therefore, the voltage across the working capacitor should be lowered by turning on the adjusting steam capacitor: 1 directly to the worker. However, with a considerable distance from the working console; from the generator, this will not be possible.

The present invention allows to improve the matching of the parameters of the load with the parameters of the generator lamp and to reduce the voltage on the working capacitor, which is far from the control capacitor.

This is achieved by sequentially switching on the inductance between one of the poles of the regulating (or operating) capacitor and the generator lamp.

FIG. 1 and 2 shows the scheme of the proposed generator.

To the inductance (Fig. 1), the input of P1E1 5 into the generator frame, the adjusting capacitor C is turned on, and IU: KD with this kondeg1satoroU1 and the generator lamp of the inductance L ;.

For such a circuit, the voltage ia is determined from 1;

   ±. C-C-r-L C C ,.

where: (", is the generator frequency, the values of C as and C" are determined by the conductivity of the lamp, and the capacitance C is determined by the dimensions of the working capacitor, the dielectric of a different material and the minimum allowable gap.

After conversion, the relation takes the form:

Yag ILdl / vOj i + gt.- L, (l -i Е, С

) Co H-C „„ Ct, w; WITH

This shows that if the injectivity LI satisfies the inequality

f (l + Lo) С „„ - ÑSa;, 10

The presence of capacitance Cr leads to a decrease in E compared with the value determined by the first formula.

The capacitance Ci can be adjusted during operation by making the capacitor variable (for example, from two

coaxial truo moving relative to each other).

It is also possible to change the position of the working and adjusting capacitors (Fig. 2).

The subject of the invention is a short wavelength ultrashort wave oscillator with self-excitation, which is used to power the working (heating) capacitor of a dielectric overheating unit, and with smooth control of the operating mode of the generator and the power released in the heated material, using a variable capacitor, included in the parallel capacitor ( in relation to the generator lamp and the working capacitor) circuit, characterized in that, in order to better match the parameters of the load with the parameters s generator and reducing the lamp voltage on the capacitor operating at a remote desktop rasnolozhenii kondeneatora by adjusting between one pole of the adjustment (or working) of the capacitor and generating Lamno sequentially enabled inductance.