Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

High-efficiency energy-saving current amplifier

A current amplifier, high-efficiency and energy-saving technology, applied in the direction of power amplifiers, can solve the problems of low precision, small maximum output current, large power loss, etc., to achieve the effect of improving sampling accuracy, reducing power loss, and increasing the maximum output current

Inactive Publication Date: 2016-03-02
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a high-efficiency energy-saving current amplifier, which can solve the problems of low sampling accuracy, large power loss and small maximum output current of the traditional current amplifier

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High-efficiency energy-saving current amplifier
  • High-efficiency energy-saving current amplifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] The present invention provides a high-efficiency energy-saving current amplifier. The present invention will be further described below in conjunction with the description of the drawings and specific implementation methods.

[0017] refer to figure 1 , figure 2 As shown, the high-efficiency and energy-saving current amplifier is used in the relay protection tester, and is composed of an input stage, a driving stage, and an output stage. The input stage is composed of LF356 operational amplifier, the driving stage is composed of transistors T1 and T3, and the output stage is composed of complementary Darlington circuit. When the collector of T3 is in the positive half cycle, the transistors T4 and T5 are turned on. When the collector of T3 is in the negative half cycle, the transistors T6 and T7 are turned on. Transistor T3 drives transistors T4 and T6, and transistors T4 and T6 drive transistors T5 and T7 respectively.

[0018] When the current output by T5 and T7...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a high-efficiency energy-saving current amplifier, belongs to the field of relay protection test apparatuses, and in particular relates to a relay protection tester. A drain D of an NMOS tube, which is taken as an input end, is connected with an output end of a current amplifier equivalent module; a source of the NMOS tube, which is taken as an output end, is connected with a load; a grid of the NMOS tube is connected with a logic control loop; the value of a sampling resistor R15 is reduced from 0.1 ohm to 0.02 ohm; an added sampling resistor R16 with the value of 0.3 ohm is added between the drain D and the source S; on and off of the NMOS tube are controlled through the voltage size of the grid; when output current of the current amplifier is larger than or equal to 15 A, the voltage of the grid is up to a threshold; when the NMOS tube is in an on state, current flows through a branch of the NMOS tube; when the output current of the current amplifier is smaller than 15 A, the voltage of the grid is not up to the threshold, the NMOS tube is in an off state, and the current flows through a branch of the added sampling resistor. According to the high-efficiency energy-saving current amplifier, which is provided by the invention, when the voltage of the grid is up to the threshold, the NMOS tube has the capability of forming a conducting channel between the source and the drain; therefore, the power loss of the relay protection tester current amplifier is reduced, the sampling precision is improved, the investment is reduced, the maximum output current is increased and the like.

Description

technical field [0001] The invention belongs to the field of relay protection test equipment, in particular to a relay protection tester device. Background technique [0002] In the field of relay protection testing, relay protection testers are the most common measuring instruments. Based on the "Technical Conditions of Microcomputer Relay Protection Test Device (Discussion Draft)" issued by the Ministry of Electric Power, extensively listen to user opinions, summarize the current advantages and disadvantages of similar domestic products, and make full use of modern advanced microelectronic technology and devices Realized a relay protection testing instrument. The analog voltage output from the relay protection tester must be amplified by the amplifier before it can be sent to the input terminal of the relay under test. The power amplifier is further divided into a voltage amplifier and a current amplifier. As an important part of the experimental device, the performance ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H03F3/20
Inventor 夏瑞华白坚实刘博
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com