COMPARISON OF CHARACTERISTICS OF THE CONVERTER-FED MOTOR AT SUPPLY FROM THE SINGLE-PHASE NETWORK AND FROM THE SOURCE OF THE DIRECT CURRENT

Authors

  • V. B. Finkelshtein O.M. Beketov Kharkiv National University of Municipal Economy, Ukraine
  • A. B. Yegorov Ukrainian Engineering Pedagogics Academy, Ukraine
  • A. M. Maleev JSC MEA of ELTA, Ukraine

DOI:

https://doi.org/10.20998/2074-272X.2015.4.03

Keywords:

converter-fed motor, magnetic flux, single-phase network of supply, capacity, power, source of direct current, rotation frequency

Abstract

Purpose. Now even more often in various cars and mechanisms converter-fed motors are used. Their comparative characteristics with motors which are supplied from a network of a direct current are necessary for definition of the specific moment of motors which are supplied from the single-phase alternating current main. Methodology. For the converter-fed motor with a ratio of teeth of the stator and a rotor 8/6 at supply from a single-phase network via the rectifier two groups of numerical experiments were carried out. Motor capacity with a constant frequency of rotation at various capacity of the capacitor at the exit of the rectifier and motor capacity at the current providing the most admissible excess of temperature of a winding are determined. Dependences of useful power on capacity size at the rectifier exit are received with a constant frequency of rotation, and also at invariable current. Results. On the basis of the made numerical experiment it is possible to conclude that due to fluctuation of tension (from 0 to 100 %) at the rectifier exit at power supply of the converter-fed motor from the single-phase alternating current main in comparison with the corresponding sizes at supply from a source of a direct current: · motor capacity at preservation of capacity of the capacitor at the exit of the rectifier and frequency of rotation decreases on 60 – 63 %; · at almost acceptable increase in capacity of the capacitor (approximately twice) power should be reduced by 50 %; · power deceleration at preservation of that size of current of the motor what took place at its food from a source of a direct current makes 40 % at preservation of size of capacity of the capacitor at the exit of the rectifier and 32 % at its doubling, the frequency of rotation decreases approximately on 13 – 15 %. Practical value. The specific moment can be determined by power sizes at single-phase supply, frequency of rotation and to the volume of a rotor, with an invariable frequency of rotation it decreases in comparison with the specific moment at power supply of the motor from a source of a direct current by 50 – 63 %.

References

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Published

2015-08-28

How to Cite

Finkelshtein, V. B., Yegorov, A. B., & Maleev, A. M. (2015). COMPARISON OF CHARACTERISTICS OF THE CONVERTER-FED MOTOR AT SUPPLY FROM THE SINGLE-PHASE NETWORK AND FROM THE SOURCE OF THE DIRECT CURRENT. Electrical Engineering & Electromechanics, (4), 15–19. https://doi.org/10.20998/2074-272X.2015.4.03

Issue

Section

Electrical Machines and Apparatus