Electric energy meter DC magnetic field generator and interference test device

A DC magnetic field and generating device technology, applied in the direction of measuring devices, circuits, magnets, etc., can solve the problems of large excitation mechanism and high cost, and achieve the effect of large magnetic field strength, simple design, and cost reduction

Active Publication Date: 2017-01-11
长沙天恒测控技术有限公司
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] The invention provides a DC magnetic field generating device and an interference test device for an electric energy meter to solve the existing problem of excitation of the electric energy meter DC magnetic field generating device by increasing the power of the excitation power supply or the number of coil turns to generate the magnetic field required for the interference test of the electric energy meter. Institutional large, costly technical issues

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  • Electric energy meter DC magnetic field generator and interference test device
  • Electric energy meter DC magnetic field generator and interference test device
  • Electric energy meter DC magnetic field generator and interference test device

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Embodiment Construction

[0034] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.

[0035] refer to figure 2 , the preferred embodiment of the present invention provides a kind of electric energy meter DC magnetic field generating device, comprises: excitation mechanism 7 and the current device that is used to provide excitation current to excitation mechanism 7; Excitation mechanism 7 comprises the first magnetic yoke 1 of strip structure and the coil 4 wound on the first yoke 1 for inputting the excitation current; The L-shaped yoke 2 in the air gap in the magnetic flux circuit generated by the yoke 1, the end of the L-shaped yoke 2 is connected with the end of the first yoke 1 to form a U-shaped structure.

[0036] The DC magnetic field generating device of the electric energy meter of the present invention reduces the air gap...

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Abstract

The invention discloses an electric energy meter DC magnetic field generator and an interference test device. The electric energy meter DC magnetic field generator comprises an excitation mechanism and a current device for providing excitation current for the excitation mechanism, wherein the excitation mechanism comprises a first bar-shaped magnetic yoke, a coil which is wound on the first magnetic yoke and is used for inputting excitation current, and at least one L-shaped magnetic yoke which is distributed circumferentially along the plane perpendicular to the axial direction of the first magnetic yoke and is used for reducing air gap in a flux loop generated by the first magnetic yoke. The interference test device comprises the electric energy meter DC magnetic field generator, an electric energy meter testing device and an upper computer. According to the electric energy meter DC magnetic field generator and the interference test device, the technical problems of large excitation mechanism and high cost of the existing electric energy meter DC magnetic field generator are solved, the simple design of the excitation mechanism in the electric energy meter DC magnetic field generator is implemented, and the cost of the electric energy meter DC magnetic field generator is reduced.

Description

technical field [0001] The invention relates to the field of electric energy metering tests, in particular to an electric energy meter DC magnetic field generating device and an interference test device. Background technique [0002] During the use of the electric energy meter, if there is an external strong magnetic field interference, it will produce a large measurement error. Due to the working principle of electromagnetic induction of the inductive energy meter, when it is disturbed by a strong magnetic field, some of the magnetic devices such as damping magnets will demagnetize and cause permanent damage; The wheel gauge will stop rolling and flipping under the influence of strong magnetism, thereby stopping the accumulation of electric energy value. In addition, the complete failure of the sampling transformer in the state of magnetic flux saturation will cause a large negative error. Driven by interests, some power users use the above principle to apply a strong magn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F7/00G01R35/04
Inventor 周新华宋文涛邹学良曾凯陈北强
Owner 长沙天恒测控技术有限公司
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