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Electronic watt-hour meter and its shunt, sampling resistance sheet and method for counteracting circuit board alternating magnetic field interference

A sampling resistor and shunt technology, applied in the measurement of electrical variables, instruments, measuring devices, etc., can solve problems such as affecting manufacturing efficiency, increasing the manufacturing cost of electric energy meters, and complicating the structure of electric energy meters, so as to eliminate magnetic field interference and increase costs. Effect

Active Publication Date: 2016-11-16
XIAMEN HONGFA ELECTRIC POWER CONTROLS
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, due to the interference of the magnetic field, a magnetic induction area will also be formed on the circuit board to generate an induced current, which requires other means, such as setting a chip on the circuit board and using the chip to offset the induced current on the circuit board. However, this The method not only greatly increases the manufacturing cost of the electric energy meter, but also complicates the structure of the electric energy meter, which affects the manufacturing efficiency

Method used

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  • Electronic watt-hour meter and its shunt, sampling resistance sheet and method for counteracting circuit board alternating magnetic field interference
  • Electronic watt-hour meter and its shunt, sampling resistance sheet and method for counteracting circuit board alternating magnetic field interference
  • Electronic watt-hour meter and its shunt, sampling resistance sheet and method for counteracting circuit board alternating magnetic field interference

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Embodiment Construction

[0024] Example embodiments will be described more fully hereinafter with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. In the drawings, the thicknesses of regions and layers may be exaggerated for clarity. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.

[0025] Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the invention. However, one skilled in the art will appreciate...

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Abstract

The invention provides an electronic energy meter, a diverter of the electronic energy meter, a sampling resistor disc and a method for offsetting the alternating magnetic field interference of a circuit board. The diverter comprises a first conducting strip, the sampling resistor disc, a second conducting strip, a first sampling endpoint and a second sampling endpoint. The sampling resistor disc is provided with a through hole in an eccentric mode. The first end of a first signal line is connected with the first sampling endpoint. The first end of a second signal line is connected with the second sampling endpoint and penetrates through the through hole. The second signal line divides the sampling resistor disc into a first sensing area and a second sensing area. The first sensing area is not equal to the second sensing area. Under the action of the alternating magnetic field, a first sensing current is generated in the first sensing area, a second sensing current is generated in the second sensing area, the first sensing current and the second sensing current are opposite in polarity and not equal in magnitude, a sensing current exists on the circuit board, and the difference value between the first sensing current and the second sensing current is opposite to the sensing current on the circuit board in polarity.

Description

technical field [0001] The invention relates to the technical field of electronic instruments, in particular to an electronic electric energy meter capable of canceling the alternating magnetic field interference of a circuit board, a shunt included therein, a sampling resistance sheet and a method for canceling the alternating magnetic field interference of the circuit board. Background technique [0002] Electronic energy meter is a kind of electronic instrument equipment, which calculates the electricity consumption by sampling the user's power supply voltage and current in real time. Our domestic electricity is alternating current, and the changing electric field will generate a magnetic field. The electronic energy meter is composed of many components. Under the interference of the magnetic field, an induced current will be generated, which will bring measurement errors. figure 1 An existing electronic electric energy meter is shown, and both the shunt 100 and the circu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R22/06G01R15/00
Inventor 钟叔明孙人太李连勇
Owner XIAMEN HONGFA ELECTRIC POWER CONTROLS
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