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Electric energy (watt-hour) meter

An electric energy and meter technology, applied in inductive instruments, measuring electric variables, measuring devices, etc., can solve the problems of increasing raw material consumption, process, tooling complexity, affecting the accuracy and service life of electric energy measurement, etc.

Inactive Publication Date: 2004-10-20
张学稳
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the work of the three-phase three-wire AC active energy (kWh) meter, mutual electromagnetic interference is generated between two sets of independent electromagnetic components, which increases the consumption of raw materials; in the production process, it leads to the complexity of the process and tooling, especially The rotating part is a double turntable structure, which increases the weight of the rotating part. The above points directly affect the accuracy and service life of electric energy measurement, resulting in cumbersome processes in processing, production, debugging, testing, etc.

Method used

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  • Electric energy (watt-hour) meter

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Embodiment Construction

[0014] Refer to attached figure 1 , figure 2 , Fig. 3, the present invention comprises voltage coil 1, voltage iron core 2, current coil 3, current iron core 4, phase angle adjustment mechanism 5, disc 6, magnetic steel 7, meter 8, bearing 9, frame 10 , Dial 11, bottom case 12, shell 13 and other parts.

[0015] The voltage coil 1 is connected with the AC voltage between two phases and connected in parallel with the actual application circuit. In terms of design requirements, the phase angle between the voltage and the working magnetic flux is 90°, which is a pure inductive element with a constant alternating magnetic field. The wire diameter is 0.13mm and the number of turns is 9000. Voltage core 2: It is made of superimposed silicon steel sheets to generate the magnetic flux of the voltage coil. non-working flux.

[0016] The current coil 3 is connected in series with the two-phase alternating current and the actual application circuit. The design requirement is a pure...

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Abstract

An electric energy (Kilowatt-hour) meter is composed of casing, voltage element, current element, counter and magnetic steel. Said voltage element is connected across two phase lines. Said current element has an iron core wound by two-phase current winding and additional short-circuit winding connected to variable resistor. Its advantages are high precision, no interference between electromagnetic elements, and light weight.

Description

Technical field [0001] The invention relates to an electricity metering device, in particular to a three-phase electric energy (kWh) meter. technical background [0002] In the three-phase AC power grid, if the three-phase load is balanced, the measured three-phase electric energy is usually measured using a three-phase three-wire AC active energy (kWh) meter. The design technical scheme of the three-phase three-wire AC active energy (kWh) meter is to use three-phase voltage and two-phase current. The line-to-line voltage between any two of the three phases interacts with its two-phase currents. A fixed current-carrying circuit is used to generate magnetic flux, which interacts with the current induced in the rotating part (aluminum disc) to generate two sets of rotational torques. such as U AB with I A and U CB with I C That is, the typical working principle of the three-phase three-wire AC active energy (kWh) meter. When the turntable rotates, the magnetic flux of t...

Claims

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Application Information

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IPC IPC(8): G01R11/06G01R11/40
Inventor 张学稳
Owner 张学稳
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