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Design of accurate current detection of three-phase inverter bridge arm

A three-phase inverter and current detection technology, which is applied in the direction of measuring current/voltage, converting AC power input to DC power output, instruments, etc., can solve problems such as low conversion efficiency, wrong current estimation, and current waveform distortion, and achieve Low cost, accurate current sensing, high accuracy effect

Pending Publication Date: 2021-01-22
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Delay or slow response in current sensing can lead to wrong current estimation, resulting in distorted current waveform, making conversion inefficient and noisy

Method used

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  • Design of accurate current detection of three-phase inverter bridge arm
  • Design of accurate current detection of three-phase inverter bridge arm
  • Design of accurate current detection of three-phase inverter bridge arm

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Embodiment Construction

[0022] This embodiment is described in conjunction with the accompanying drawings. The design of a three-phase inverter bridge arm accurate current detection in this embodiment includes a DC / AC conversion module, a filter module, a drive module, a current acquisition module, a current sensing module, Temperature protection module, overcurrent protection module, voltage sampling module, motor and microcontroller. The DC / AC conversion module is connected to the current acquisition module, the current acquisition module is connected to the current sensing module, the current sensing module is connected to the microcontroller, the DC / AC conversion module is connected to the filtering module, the filtering module is connected to the motor, and the filtering module is connected to the The voltage sampling module is connected, the voltage sampling module is connected with the microcontroller, the microcontroller is connected with the drive module, the drive module is connected with th...

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Abstract

The invention relates to the field of three-phase electric energy conversion, in particular to a design of accurate current detection of a three-phase inverter bridge arm. The design of accurate current detection of a three-phase inverter bridge arm comprises a DC / AC conversion module, a filtering module, a driving module, a current acquisition module, a current sensing module, a temperature protection module, an overcurrent protection module, a voltage sampling module, a motor and a microcontroller, and can realize accurate current sensing; ripple waves and audible noise of a three-phase inverter are reduced to the maximum extent.

Description

technical field [0001] The invention relates to the field of three-phase electric energy conversion, in particular to a design for accurate current detection of a bridge arm of a three-phase inverter. [0002] technical background [0003] Inverter technology is a technology that converts direct current converted from new energy such as solar energy into alternating current. With the rapid development of power electronics technology, inverter technology is widely used in various industries. Especially with the increasing shortage of major energy sources such as oil, coal and natural gas, the development and utilization of new energy sources have attracted more and more attention. [0004] The inverter is an important part of the entire current conversion, and its performance directly affects the quality of electric energy. Delay or slow response in current sensing can lead to erroneous current estimation, resulting in distortion of the current waveform, resulting in ineffici...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/5387G01R19/00H02P27/00H02P27/08
CPCH02M7/53873G01R19/00H02P27/00H02P27/08H02M1/0009
Inventor 颜景斌刘清岚李瑞松
Owner HARBIN UNIV OF SCI & TECH