SU1013877A1 - Working inductor power meter - Google Patents

Abstract

OPERATING POWER METER; : GO INDUCTOR containing a bi-driver, phase-sensitive rectifier, first and second capacitive load dividers connected to a working inductor and a common bus, power meter, characterized in that, in order to improve accuracy, self-integrating with, Rogowski, two transformers, three capacitors, a variable capacitor, four resistors, the primary windings of the first and second transformers are connected respectively to the outputs of capacitive voltage dividers, the secondary winding of the first transformer from connected via a variable capacitor in parallel, a first oscillating circuit is formed, which is connected via a rectifier parallel to the first capacitor and through the first resistor to the first input of the wattmeter, the secondary winding of the second transformer and the second capacitor connected in parallel form a second oscillating circuit connected in parallel to the second resistor, and the first input of the phase-sensitive rectifier, the second input of which is connected to the serially connected Su Ro-C Govski, shunted by the third resistor, the third capacitor, parallel to which a second wattmeter is connected through the fourth resistor. CO 00

Description

The invention relates to the field of electrical measurements and can be used in devices for measuring the power of a new frequency installation.

A high-frequency wattmer rectifier is known that contains a direct current voltage connected to the rectifier 11.

Its lack of accuracy is neka.

Closest to the invention is a working inductor power meter, which contains a rectifier, a phase-sensitive rectifier, first and second capacitive voltage dividers connected to a working 1 | 1 inductor and common busbar / wattmeter.

A disadvantage of the known device is low accuracy.

The aim of the invention is to improve the accuracy. . The post-goal is achieved by the fact that the power meter of the working inductor containing the rectifier, phase-rectifier rectifier, the first and second capacitive voltage dividers connected to the working inductor and the common busbar, wattmeter, is inserted into Rogowski’s self, two a transformer, three capacitors, a variable capacitor, four resistors, the primary windings of the first and second transformers are connected respectively to the outputs of capacitive voltage dividers, the secondary winding of the first transformer Pa with a parallel-variable capacitor form the first oscillating circuit connected via a rectifier parallel to the first capacitor and through the first resistor to the first input of the wattmeter, the secondary winding of the second transformer with a second capacitor connected in parallel form the second oscillating circuit connected in parallel to the second resistor and the first input of the phase-sensitive detector, the second input of which is connected to the series-connected integrating circuit of Rogowski su, connected with the third resistor, the third capacitor, in parallel with which the second input of the wattmeter is connected via the fourth resistor.

The drawing shows a diagram of the power meter of the working inductor.

The working inductor's power meter contains rectifier 1, phase-sensitive rectifier pin 2, first and second capacitive dividers 3 and 4 voltages, integrating according to Rogowski 5, two transformers b and 7, THREE capacitors 8 - 10, four resistors 11-14, wattmeter 15, variable capacitor 16.

Power meter working inductor works as follows.

When the power inductor of the working inductor is put into operation, the potential from the capacitive voltage divider 3 will be removed from the voltage generated at the working inductor. Then, using the resonant circuits, the first harmonic is introduced, which causes the DC component from the rectifier 1 to pass through the winding of the wattmeter 15. The phase-sensitive rectifier is controlled at {true value of the phase angle / between the signal current and control voltage, since the oscillating circuit tuned to the fundamental harmonic is switched on at the power input of the control circuits of the phase-sensitive rectifier 2. Induced emf by extraneous fields and other harmonics are eliminated by rectifier 1 and resonant circuits.

Due to the introduction into the power meter of the working inductor of two transformers, self-integrating along the Rogowski circuit, variable capacitor, capacitors and resistors, the power is measured more accurately.

Claims (1)

POWER INDICATOR OF A WORKING- * GO INDUCTOR, comprising a rectifier, a phase-sensitive rectifier, first and second capacitive voltage dividers connected to a working inductor and a common bus, a wattmeter, characterized in that, in order to increase accuracy, a self-integrating belt is introduced into it. Rogovsky, two transformers, three capacitors, a variable capacitor, four resistors, and the primary windings of the first and second transformers are connected respectively to the outputs of the capacitive voltage dividers. the secondary winding of the first transformer with a variable capacitor connected in parallel form a first oscillatory circuit that is connected through a rectifier parallel to the first capacitor and through the first resistor to the first input of the wattmeter, the secondary winding of the second transformer with a second capacitor connected in parallel forms a second oscillator that is connected in parallel with the second mass - § a torus and the first input of a phase-sensitive rectifier, the second input of which is connected to series Rogovsky’s self-integrating belt, shunted by a third resistor, a third capacitor, in parallel with which the second input of the wattmeter is connected through the fourth resistor. 01’ns GO 00 h * 4 1.013877 2