A Method for Improving Power Factor in Inverter-Fed Induction Motors by the Use of Rotor Convex Copper Bars
| Autor: | Yixiang Xu, Jinlong Fang, Wei Xu, Tao Hong, Xiaohua Bao |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Leakage inductance Materials science Rotor (electric) Bar (music) 020208 electrical & electronic engineering chemistry.chemical_element 02 engineering and technology Power factor 01 natural sciences Copper Industrial and Manufacturing Engineering law.invention Power (physics) chemistry Control and Systems Engineering Control theory law 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Inverter Electrical and Electronic Engineering Induction motor |
| Zdroj: | IEEE Transactions on Industry Applications. 56:3636-3643 |
| ISSN: | 1939-9367 0093-9994 |
| Popis: | Copper bars are often utilized in the rotor of a high power induction motor in order to reduce joule loss and improve overall efficiency. In this article, a kind of rotor convex copper bar is introduced instead of the conventional rectangle copper bar in the case of inverter-fed induction motors. The difference in the leakage reactance between the convex and the rectangle copper bar is analyzed. The use of convex copper bars can reduce the leakage reactance to some extent as the frequency rises. The decrease of the leakage reactance can contribute to restraining the ascending trend of the rotor reactive current. Finite-element method is taken to carry out the simulation, and a 550 kW prototype is produced to validate the proposed method. Experimental results indicate that the application of convex copper bars can help to lower the rotor reactive current and improve the power factor when the motor works near the end of the constant power area. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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