SU1492302A1 - High-frequency oscillator oscillatory power meter - Google Patents

Abstract

The invention relates to the field of electrical measurements and can be used in the construction of oscillatory power meters of generators, which are used in radio transmitters, as well as in electrometry. The purpose of the invention is to expand the field of use of the meter by maintaining accuracy when measuring the load of the generator. To achieve it, a cut-off angle conversion unit 10 is inserted in the meter, containing a driver, a clock pulse generator, a frequency divider and a key, a functional unit 11 and a multiplying unit 12. The meter also contains an anode current scale converter 5, an anode voltage scale converter 6 which includes a capacitive divider 7 and a rectifying unit 8 with a low-frequency filter, an electrodynamic wattmeter 9, a high-frequency generator 1 containing a lamp 2, an anode load 3 and a feedback chain 4. The meter allows you to measure the power of generators operating in a mode with anode current cut-off. 1 hp f-ly, 2 ill.

Description

41 WITH

to

SAE About tsd

(pw /

The invention relates to electrical measurements, in particular, to devices dp of measuring power in the range of radio frequency, and may find application in the construction of oscillators and oscillators for generators, which are used in radio transmitters, as well as in electrothermal devices.

The purpose of the invention is to expand the field of application by maintaining accuracy when changing the generator load.

FIG. Figure 1 shows a diagram of the inclusion of a meter in the generator load circuit; in fig. 2 is a diagram of a unit for converting a corner angle.

The generator 1 consists of a lamp 2, anode load 3 and a chain 4 of the inverse SV5GZI. The meter consists of large-scale current transducers 5 and voltage 6, the latter includes a capacitive divider 7 and a termination unit 8 with a low-pass filter, an electrodynamic power meter 9, a unit. 10 converts the cut-off angle, the functional unit 11 and the multiplying unit 12.

The current scale converter 5 is connected in series to the cathode circuit of the lamp 2 and in parallel with the current winding of the meter and the input of the cut-off angle conversion unit 10, the output of which is connected in series with the functional unit 11 and the first input of the duplication unit 12, the second input of which is connected functions of high saturation and low-frequency filter, the input of block 8 is connected to the outputs of capacitive divider 7 connected in parallel to the anode load 3 of lamp 2. Block 10 converts the cut-off angle by fcg. 2 consists of a generator 13, a clock pulse generator 14 connected via a frequency divider 15 to a second input of key 16, the first input of which is connected to the output of generator 13, whose input is the input of block 10, and the output of the key - output of block 10.

The meter works as follows.

A voltage proportional to the anode current of the generator 1 feeds the current winding of the wattmeter 9 and post 10

15

20

It is used to isolate the cut-off angle from the output of block 10, a pulsed sending, proportional to the cut-off angle, goes to a functional unit that transforms the form 1 / a «« Xt- b, where a and b are constant coefficients, and X - input led 1in. Further, the voltage is proportional to

one

the magnitude of -d-yr is multiplied by a voltage proportional to the anode voltage of the generator. As a result of the integrating property of the current winding of the power meter, it turns out that it is equivalent to the product

Ao Lo-jgTV

Since Ifl, o (, Irn,

ao o if where c / o, C) / decomposition coefficients.

La,

-as

one

ab + b

where 0 is the anode current cutoff angle

Imi

a and b - coefficients of approximation of the fractional-linear dependence function

OS 26 - sin2 (9

.2 (sin8 -0 cos0)

Approximately can be written

 About oL IovUao R ,,

power of the first harmonic of the anode current.

Thus, the meter allows to measure the power of generators operating in the mode with anode current cut-off.

Claims (2)

Invention Formula I. An oscillating power meter of a high-frequency generator containing a scale converter of anode current, connected in series to the cathode circuit of the generator generator j scale converter of the anode voltage, which consists of series-connected capacitive divider and grounding unit with a low-frequency filter, moreover, capacitive the divider is connected in parallel to the anode load of the generator, and the output of the rectifier 514 mitepryugo unit is a low-frequency filter output, as well as an electrodynamic wattmeter, the current winding of which is connected to the large-scale current suppressor in parallel, about UI and so that, in order to expand the application area by maintaining accuracy when the load changes a generator, serially connected cut-off angle conversion units and a functional block, as well as a multiplier block are harmful to it, and the output of the large-scale anode current converter is connected to the input of the hibernation, the functional unit output is connected to a first input of a multiplier unit, the second 2 ° the input of which is connected to the output of the low-frequency filter of the rectifying unit, and the output is connected to the winding of the voltage of the electrodynamic wattmeter. 2. The meter according to claim 1, which is based on the fact that the transducer of the cut-off angle contains a driver, a clock pulse generator, a frequency divider and a key, the driver input is the input of the unit, and the output is connected to the first key input The second input of which is connected via a frequency divider to the clock pulse generator, and the output is the output of the cut-off angle conversion unit. 1l sixteen 15 FIG g