9818246806

Zeszyły Problemowe - Maszyny Elektryczne Nr 86/2010

Abstract: The paper presents the calculation of the basie and additional core loss of the smali size induction motor supplied from the power network for 50 Hz. and by a voltage-frequency comerter for the frequency changing from 0 to 250 Hz. The calculations were madę by use the field - Circuit method. as well as by use known from the literaturę Circuit methods. The calculation results were verif!ed by measurement. Calculations were perfonned using the measured characteristics of the specific core losses of the electrical sheets as a fitne-tion of the flux density and frequency.

Vitezslav Hajek, Ondrej Vitek, Hana Kuchynkova Brno University of Technology, Czechy

STARTER UNIQUE CONCEPTION

ROZRUSZNIK SPECJALNEJ KONCEPCJI

Abstract: Practical operation shows that tire overall reliability and durability of vehicles is affected. to large extent, by the starting characteristics of combustion engine. and also by the power and energy characteristics of the starting system. The starting system means a starter, electromagnetic switch, and storage batteiy.

Zbigniew Gałuszkiewicz¹, Krzysztof Krykowski² Antoni Skoć³, Janusz Hetmańczyk²

¹    Megatech Kalety

²    Politechnika Śląska, Katedra Energoelektroniki, Napędu Elektrycznego i Robotyki

³    Politechnika Śląska, Instytut Mechanizacji Górnictwa

REZONANS MECHANICZNY W WYSOKOOBROTOWYM SILNIKU PM BLDC

MECHANICAL RESONANCE IN HIGH-SPEED PM BLDC MOTOR

Abstract: Mechanical resonance problem which occur in high-speed pennanent magnet brushless DC motor is presented in the paper. The authors describe a vibration which appears in motor drive and show calculation procedurę of transverse vibration as a significant part of proper vibration. Laboratory test with prototype high-speed brushless DC motor is presented in the last part of the paper. Waveforms of stator vibration and lines currents are shown as results of conducted experiment with prototype high-speed brushless DC motor. Labo-ratoiy test confirms theoretical analyses.

Janusz Hetmańczyk¹, Krzysztof Krykowski¹,

Zbigniew Gałuszkiewicz³, Roman Miksiewicz², Dawid Makieła¹

¹    Politechnika Śląska, Katedra Energoelektroniki, Napędu Elektrycznego i Robotyki

²    Politechnika Śląska, Katedra Maszyn i Urządzeń Elektrycznych

³    Megatech Kalety

WYSOKOOBROTOWY SILNIK WZBUDZANY MAGNESAMI TRWAŁYMI

HIGH-SPEED PERMANENT MAGNET BRUSHLESS DC MOTOR