DOI: https://doi.org/10.15407/techned2018.05.073

INFLUENCE OF CROSS-CURRENT CURRENTS ON CHARACTERISTICS OF INDUCTION MOTORS

Authors
V.B. Finkelshtein¹, D.N. Kalyuzhnyi¹, Yu.V. Kovalova¹, A.N. Getya^2
1 – A.N. Beketov National University of Urban Economy in Kharkiv,
17, Marshal Bazhanov Street, Kharkіv, 61002, Ukraine,
e-mail: Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript
² – SKB UKRELEKTROMASH,
37, Iskrinska Street, Kharkіv, 61005, Ukraine,
email: Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript

To calculate the design of asynchronous motors with bevel grooves with a given value of the resistance of insulation of the rotor cell developed a technique. The line with distributed parameters, which is a model of the rotor in the presence of transverse currents, is replaced by 70 elementary circuits. It has been theoretically and experimentally established that transverse currents significantly increase the moments of the engine. The dependences of the multiplicity of the motor moments on the value of the resistivity of the insulation of the rotor cell are obtained. It has been experimentally established that when the rotor is heated by currents in a cell, at a temperature of the order of 250-300 ° C, the resistance of rod insulation increases, which leads to an increase in current and torque. References 7, figures 4, tables 2.

Key words: squirrel-cage rotor, insulation resistance, resistance jump, transverse currents, bevel of slots.

Received: 05.09.2017
Accepted: 13.06.2018
Published: 16.08.2018

References

1. Haintsev Yu.V. Stray load losses in iduction motors. Moskva: Energoizdat, 1981. 184 p. (Rus)
2. Serrano-Iribarnegaray L., Martinez-Roman J. Critical review of the analytical approaches accounting for interbar currents and experimental study of ageing in two-speed asynchronous motors for elevator drives. IEE Proceedings Electric Power Applications. 2005. Vol. 152. No 1. Pp. 72-80.
3. Williamson S., Smith A.C. Equivalent circuits for cage induction motors with inter-bar currents. IEE Proceedings Electric Power Applications. 2002. Vol. 149. No 3. Pp. 173–183.
4. Heller B., Hamata V. Supreme of a harmonic in induction motors. Moskva: Energiia, 1981. 352 p. (Rus)
5. Williamson S., Poh C.Y. Inter-bar currents in cage induction motors. Electric Power Applications. 2005. Vol. 152. No 5. Pp. 1106 – 1112.
6. Hurin Y.S., Kuznetsov B.I. Designing of series of electrical machines. Moskva: Energiia, 1978. 480 p. (Rus)
7. Finkelshtein V.B. Certificate of registration of copyright for a work Computer program for verification calculation of three-phase induction motors with allowance for slanting of grooves and transverse current. UA № 76390, 2018. (Ukr)

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