文章基本信息

标题：A Novel Solution for Sensing 3ф Current of VSI Based Ac Drives Using Single Current Sensor
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作者：Sameera Kanchwala ; Amol Barve
期刊名称：International Journal of Electrical, Electronics and Computer Engineering
电子版ISSN：2277-2626
出版年度：2013
卷号：2
期号：1
页码：9
语种：English
出版社：RESEARCH TREND
摘要：ABSTRACT: In this thesis a technique for measuring and controlling line currents of three phase AC motors using information from a single current sensor resistor mounted in the DC-link of an inverter is presented. The principal motivation is to reduce the sensor cost, weight, and volume and also to improve the reliability of a drive system.However the basic dc link single current sensor technique poses a limitation because the duration of the active voltage vectors must be long enough to measure the dc link current reliably. To overcome this problem a new algorithm called the measurement vector insertion method is presented along with basic single current sensor technique that overcomes this problem using active voltage vectors that are applied for brief measurement intervals only when needed during each cycle of fundamental frequency.