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Electronic mutual inductor

An electronic transformer and voltage technology, which is applied in the direction of inductors, circuits, transformers, etc., can solve the problems of inability to provide energy, limited life, circuit impact, etc., and achieve the effects of simple structure, cost saving, and high reliability

Inactive Publication Date: 2011-11-30
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main difficulty of small CT energy supply is that it cannot provide enough energy when the bus current is small, and there is an impact on the circuit when the current is large (such as short circuit); the main problem of laser energy supply is high cost and limited life

Method used

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  • Electronic mutual inductor
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Embodiment Construction

[0016] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] Such as figure 1 As shown, the electronic transformer of the present invention includes a low-voltage side part, a high-voltage side part, and an optical channel connecting the above two parts. It is characterized in that the low-voltage side part has a light-emitting element 2, and the high-voltage side part has light energy A photoelectric cell 5 converted into electrical energy, a photoelectric / electrical-optical converter 10 for signal conversion, a voltage or current sensor 9 , an analog signal processing circuit 7 and an analog-to-digital converter 8 .

[0018] A DC or 220V AC power supply 1 supplies power to the light-emitting element 2 on the low-voltage side. The light emitted by the light-emitting element 2 becomes a parallel light beam 4 through the parabola 3, and is transmitted to the photoelectric cell 5 on the hi...

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Abstract

The invention relates to an electronic mutual inductor belonging to the field of electrically measuring instruments and high-voltage devices. The electronic mutual inductor adopts the technical scheme that a light source device emits light by a ground AC or DC power supply, the light is transmitted to a high-voltage side and photoelectrically converted by a photovoltaic device to supply power to an electronic circuit. A light signal between a high-voltage side and a low-voltage side is transmitted along an air gap channel without optical fiber, and a luminous tube and a receiving tube at bothsides are arranged on the same line. The invention overcomes the problems of easy fracture and complicated mounting process optical fiber in the mounting process. The device has simple structure, lowprices, stable and reliable performance and high performance price ratio.

Description

technical field [0001] The invention relates to the field of electrical measuring instruments and high-voltage system measuring equipment, in particular to an electronic transformer. Background technique [0002] The traditional electromagnetic transformer is based on the principle of electromagnetic induction, and is mainly composed of an iron core and a coil. This kind of transformer has saturation problems, and the frequency band is not wide. With the increase of the voltage level, the insulation is difficult and the cost is high. Electronic transformers have good insulation performance between high and low voltage, no saturation, good transient characteristics, and easy to realize digital measurement and protection, so they are widely valued. [0003] Electronic transformers are divided into passive type and active type, and active electronic transformers are the focus of current research. Due to the presence of electronic circuits on the high-voltage side of active ele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F38/20G01R15/18
Inventor 李开成
Owner HUAZHONG UNIV OF SCI & TECH