Energy efficiency evaluation method of asynchronous motor under three-phase voltage imbalance

• Main Authors: WU ZHIYING, CHEN ZIHUI, LI CHENMENG, CHEN JIHUI, WAN ZHIQIANG, NI HUIHAO, XU QIAOYUN, WANG SHUOJUN, TANG MINGHUA, WU JIANPING, ZHOU KUN, MAI RONGHUAN, LIU YONGHAO, YANG XI, HE XINGHUA, LIAO HAOQUAN, YE WEILING, LIU HE, YIN JIANG, CHEN JING, LIU HENG
• Format: Patent
• Language: Chinese; English
• Published: 04.12.2020
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention relates to an energy efficiency evaluation method for an asynchronous motor under three-phase voltage imbalance, and the method comprises the steps: 1, building an energy efficiency simulation model according to a T-type equivalent circuit and a symmetric component method; step 2, under the same load condition, acquiring energy efficiency data of the asynchronous motor interfered bythree-phase voltage imbalance; 3, substituting the data into an energy efficiency model to perform simulation calculation, performing error analysis on a simulation value and an actual measurement value of the energy efficiency, and correcting a theoretical energy efficiency simulation model; and 4, performing simulation calculation again, and performing least square-based curve fitting on simulation data to obtain a function relationship between the asynchronous motor energy efficiency and the three-phase voltage unbalance degree at a rated rotating speed. Through the evaluation method, the energy efficiency of the m