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tom Nr 88
19-24
EN
Transients of electrical and mechanical quantities in the system: battery - car starter with brushless direct current motor (BLDC motor) - combustion engine were computed at different ambient temperature. Electromechanical characteristics of the car starter were determined. Transients as well as electromechanical characteristics were determined taking into account physical phenomena in the entire system. Computations were conducted with the help of developed mathematical model and computational program. Circuit-field method was applied. Quantities determined using the time-stepping finite element method (with the help of a commercial software) were used as the parameters of the mathematical model equations. Analysis of the temperature influence on the transients of electrical and mechanical quantities in the system as well as on electromechanical characteristics of the car starter with BLDC motor was carried out.
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Content available remote Analysis of a brushless DC motor integrated with a high-pressure vane pump
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EN
A new design of a brushless direct current motor is introduced in this paper. In the BLDC motor, a high-pressure vane pump is built into the rotor. The motor is excited by neodymium magnets. Its nominal power is 2.5 kW. The motor is built in such a way that the magnetic field does not penetrate the pump. A magnetic structure field analysis of the motor was performed. Demagnetization resistance of the magnets was determined. By the use of time stepping, finite element method waveforms of the electrical and mechanical parameters in the BLDC motor–inverter system were determined.
PL
Opracowano nową konstrukcję silnika bezszczotkowego (BLDC ), w którego wirnik wbudowana jest wysokociśnieniowa pompa łopatkowa. Silnik wzbudzany magnesami neodymowymi ma moc 2,5 kW. Zbudowany jest w taki sposób, aby pole magnetyczne nie wnikało do wnętrza pompy. Przeprowadzono polową analizę obwodu magnetycznego silnika. Wyznaczono odporność magnesów na odmagnesowanie. Metodą polowo-obwodową wyznaczono przebiegi czasowe wielkości elektrycznych i mechanicznych w układzie silnik–przekształtnik.
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PL
Opracowano model matematyczny układu: akumulator - rozrusznik samochodowy z silnikiem bezszczotkowym (BLDC) - silnik spalinowy. Uwzględniono zmiany parametrów akumulatora, zmienny charakter momentu tarcia oraz momentu sprężania silnika spalinowego oraz zmienność momentu bezwładności układu. Opracowano program obliczeń w środowisku MATLAB. Zamieszczono przykładowe przebiegi czasowe wielkości elektrycznych i mechanicznych w układzie.
EN
A mathematical model of the system: battery - starter with brushless DC motor - combustion engine was developed. The developed mathematical model takes into account the battery parameters variations, combustion engine crankshaft moment of inertia variations as well as the variations of both the compression torque and the combustion engine friction torque. Program for calculations was developed. Transients of electrical and mechanical quantities in the analyzed system were presented.
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Content available Badania bezszczotkowego silnika prądu stałego
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EN
Developed mathematical model, algorithm and computational program of brushless DC motor were presented. Computed results of electrical and mechanical quantities transients as well as operating characteristics were shown. Laboratory testing stand and developed software in LabVIEW environment were presented. Measured results of electrical and mechanical quantities transients as well as operating characteristics were shown. Comparative analysis of the computed results and measured results was made.
EN
The mathematical model, algorithm and computational program of the system: battery – pulse converter – permanent magnet commutator motor were developed. The program was developed in Matlab – Simulink environment. Calculations of transients of electrical and mechanical quantities during dynamic and steady states and electromechanical characteristics of the motor were carried out. Analysis of load torque, ambient temperature and battery capacity influence on transients of electrical and mechanical quantities in the system were carried out. Circuit-field method was applied. Quantities determined using finite element method (with the help of commercial software) are used as the parameters of the mathematical model equations which define: the electromotive force, the electromagnetic torque and the iron losses. The mathematical model, algorithm and computational program take into consideration: the dependence of the instantaneous values of battery voltage and its internal resistance on the values of the current, temperature and charge ratio; the dependence of the instantaneous values of magnetic flux and electromagnetic torque on the values of the current, temperature and rotor position; the dependence of the motor and converter power losses on the instantaneous values of the current and the pulse-frequency modulation of the converter.
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Content available remote Silnik bezszczotkowy z wbudowaną wysokociśnieniową pompą łopatkową
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PL
Przedstawiono silnik bezszczotkowy (BLDC) w którego wirnik wbudowana jest wysokociśnieniowa pompa łopatkowa. Zaprojektowany silnik wzbudzany magnesami neodymowymi ma moc 2,5 kW. Silnik jest zbudowany w taki sposób aby pole magnetyczne nie wnikało do wnętrza pompy. Przeprowadzono polową analizę obwodu magnetycznego silnika. Wyznaczono odporność magnesów na odmagnesowanie w różnej temperaturze. Wyznaczono przebiegi czasowe w układzie silnik – przekształtnik.
EN
A brushless DC motor was presented. In the BLDC motor a high-pressure vane pump is built in the rotor. The designed motor of the power of 2.5 kW is excited by the neodymium magnets. The motor is built In such a way that the magnetic field does not enter into the pump. Magnetic circuit field analysis of the motor was carried out. Demagnetization resistance of the magnets was determined at various temperatures. Waveforms in the system: BLDC motor – inverter were determined.
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Content available remote Analiza pracy rozrusznika samochodowego z silnikiem bezszczotkowym
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PL
Omówiono sposób modelowania rozrusznika samochodowego z silnikiem bezszczotkowym. Przedstawiono obliczone przebiegi czasowe wielkości elektrycznych i mechanicznych oraz charakterystyki elektromechaniczne rozrusznika z silnikiem BLDC w różnej temperaturze.
EN
Modelling method of a car starter with BLDC motor was discussed. Mechanical and electrical quantities transients as well as electromechanical characteristics (in different temperature) of the car starter with BLDC motor were presented.
EN
Two-dimensional, field-circuit, model of a brushless DC motor excited by NdFeB magnets was developed. A computational analysis, in dynamic and steady states, of the impact of load and temperature changes on: the magnetic field distribution, the value of the magnetic flux and its pulsations, the value of the electromagnetic torque and its pulsations, the electrical and mechanical quantities transients in the power supply - converter - three phase BLDC motor system was performed. Permanent magnets demagnetisation resistance was analysed.
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