Impact of asymmetrical phenomena on asynchronous three-phase motors in operation mode
- Organ:Faculty of Electro-MechanicsHanoi University of Mining and Geology
- Keywords: Asymmetry voltage, Motor performance,Three-phase asynchronous motor.
- Received: 17th-Mar-2020
- Accepted: 13th-June-2020
- Available online: 30th-June-2020
- Field: Electro-Mechanics
The general theory of three-phase motors is often built based on the assumption that the three phases voltage is symmetrical. However, in practice, this operation mode of the motor cannot be achieved due to a number of reasons such as the structure of the motor is not symmetrical, the load in the electrical system is not balanced. The asymmetry of threephase voltage greatly affects the operation mode of a three-phase asynchronous motor. The most serious affections are: decrease the starting torque, increase stator current and rotor current, vibration inside the motor. This affection will reduce the effective operation of the motor. The paper investigates the effect of asymmetry voltage on the normal operation mode of a three-phase asynchronous motor based on the electromagnetic transforming method of electric machines and simulating on Matlab-Simulink.
. Davar Mirabbasi, Ghodratollah Seifossadat, Mehrdad Heidari. Effect of Unbalanced Voltage on Operation of Induction Motors and Its Detection. International Conference on Electrical and Electronics Engineering - ELECO, pp 189-192, 2009.
. Victoria Romanova, Sergey Khromov. Effect of asymmetry of supply voltages on asynchronous motor operation modes. E3S Web of Conferences 58, 03013 (2018). https://doi.org/10.1051/e3sconf/20185803013.
. Do Nhu Y. The impact of unsinousoidal currents to the operating efficiency of 3 phase induction motors. Earth sciences and natural resources for sustainable development- ERSD, pp109-114, 2018.
. V.Gia Hanh, T.Khanh Ha, P.Tu Thu, N.Van Sau. Electric machine 1. Science and Technology Publishing House. 327tr, 2001.
. Prashanna Dev Bhatarai Louisiana. Study on effects of supply voltage asymmetry and distortion on induction machine. Louisiana State University, 2013.
. P Giridhar Kini, R C Bansal, R S Aithal. Impact of voltage unbalance on the performance of three-phase induction motor. The South Pacific Journal of Natural Science 24(1), pp 45 – 50, 2006.
. Donald W. Novotny, Syed A. Nasar. High Frequency Losses in Induction Motors. University of Wisconsin, 129tr, 1991.