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Fiber-isolated analog output circuit apparatus

An output circuit and optical fiber isolation technology, which is applied in the field of converters, can solve the problems of long-distance signal transmission and signal susceptibility to interference.

Inactive Publication Date: 2016-03-02
AUTOMATION RES & DESIGN INST OF METALLURGICAL IND
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a fiber-isolated analog output circuit device, which solves the problems of long-distance signal transmission and signal interference in high-power transmission systems, can respond quickly, and realizes photoelectric isolation of signals, second-order Purpose of low frequency filtering, attenuation compensation, offset amplification

Method used

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Embodiment Construction

[0015] In order to describe the present invention more specifically, the technical solution and related principles of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments. The following description of the embodiments is only to provide a clear explanation of the present invention by showing examples of the present invention. The present invention is not limited to any specific configuration presented below, but covers any modification, replacement, improvement of related elements without departing from the spirit of the present invention.

[0016] Such as figure 1 As shown in the basic flow chart of the fiber-optic isolated analog output circuit, the present invention includes a fiber receiving circuit a, a shaping and reverse circuit b, a second-order filter circuit c, an attenuation compensation circuit d, a voltage offset circuit e, and a quadruple amplification circuit f . exist image 3 The voltage offset...

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Abstract

The invention discloses a fiber-isolated analog output circuit apparatus, and belongs to the technical field of a current transformer. The apparatus comprises a fiber receiving circuit, a shaping and reversing circuit, a second-order filter circuit, an attenuation compensation circuit, a voltage offset circuit and a quadruple amplification circuit, wherein the fiber receiving circuit and the shaping and reversing circuit are connected, the shaping and reversing circuit is connected with the second-order filter circuit, the second-order filter circuit is connected with the attenuation compensation circuit, the attenuation compensation circuit is connected with the voltage offset circuit, and the voltage offset circuit is connected with the quadruple amplification circuit. The apparatus provided by the invention has the following advantages: signals are transmitted through light, the problem of easy interference of signals is solved, and the signals can be transmitted over a further distance.

Description

technical field [0001] The invention belongs to the technical field of converters, and in particular provides an optical fiber isolated analog quantity output circuit device. It solves the problems of long-distance signal transmission and signal interference in high-power transmission systems. Background technique [0002] With the development of power electronics technology, the power of the converter is getting bigger and bigger, especially in the high-power converters of several megawatts to tens of megawatts, the cabinet of the converter is very long, and the signal transmission is relatively long. It is difficult for ordinary electrical signals to transmit such a long distance, and the electromagnetic interference is very serious due to the switching of the power device of the converter. Analog signals are weak signals and are susceptible to interference. Contents of the invention [0003] The purpose of the present invention is to provide a fiber-isolated analog ou...

Claims

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Application Information

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IPC IPC(8): H02M1/092H03H11/24
CPCH02M1/092H03H11/24
Inventor 石志学罗晓飞金传付宋克俭路尚书张云贵
Owner AUTOMATION RES & DESIGN INST OF METALLURGICAL IND
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