PL
 |
EN
Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl
Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 31

Liczba wyników na stronie
first rewind previous Strona / 2 next fast forward last
Wyniki wyszukiwania
Wyszukiwano:
w słowach kluczowych:  torque ripple
help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 2 next fast forward last
1
Content available Influence of harmonic voltage coupling on torque ripple of permanent magnet synchronous motor
100%
Geng S. , Zhang Y. , Qiu H. , Yang C. , Yi R.
Archives of Electrical Engineering
|
2019
|
tom Vol. 68, nr 2
399--410
EN
The permanent magnet synchronous motor (PMSM) driven by an inverter is widely used in the industrial field, but the inverter has a significant impact on the operational stability of the PMSM. The torque ripple of the PMSM is directly affected by the coupling of multiple harmonic voltages in the motor windings. In order to analyze its influence, a water-cooled PMSM with 20 kW 2000 r/min is taken as an example to establish the finite element model of the prototype, and the correctness of the model is verified by experiments. Firstly, based on the finite element method, the electromagnetic field of the PMSM is numerically solved in different operating states, and the performance parameters of the PMSM are obtained. Based on these parameters, the influence of the harmonic voltage amplitude on the torque ripple is studied, and the influence law is obtained. Secondly, combined with the decoupling analysis method, the influence of harmonic voltage coupling on the torque ripple is compared and analyzed, and the variation law of harmonic voltage coupling on the torque ripple is obtained. In addition, the influence of different harmonic voltage coupling on the average torque of the PMSM is studied, and the influence degree of different harmonic voltage amplitude on the torque fluctuation is determined. The conclusion of this paper provides reliable theoretical guidance for improving motor performance.
2
Content available Komutacyjne tętnienia momentu silnika PM BLDC
100%
Piwowarczyk R. , Krykowski K. , Hetmańczyk J.
Maszyny Elektryczne : zeszyty problemowe
|
2016
|
tom Nr 3 (111)
1--6
PL
W bezszczotkowym silniku prądu stałego komutator mechaniczny zostaje zastąpiony przekształtnikiem energoelektronicznym pełniącym rolę komutatora elektronicznego. W chwilach przełączania poszczególnych uzwojeń fazowych pojawiają się w silniku pulsy prądu. Pulsy te powodują powstawanie pulsów momentu elektromagnetycznego i prędkości kątowej silnika. W artykule zaproponowano prostą metodę określania wielkości pulsów momentu. Uzyskane wyniki zweryfikowano za pomocą badań symulacyjnych w programie Matlab/Simulink wykonanych na modelu komputerowym silnika PM BLDC.
EN
The In a brushless DC motor mechanical commutator is replaced by a power electronics converter serving as an electronic commutator. The pulses of the motor current appear in moments of switching individual phase windings. These pulses cause the formation of pulses of electromagnetic torque and angular speed of the motor. This paper proposes a simple method of determining the magnitude of torque pulses. The achieved results have been verified through simulation research in Matlab/Simulink environment performed on a computer model of PM BLDC motor.
3
Content available Cogging torque and torque ripple analysis of permanent magnet flux-switching machine having two stators
100%
Awah C. C. , Okoro O. I. , Chikuni E.
Archives of Electrical Engineering
|
2019
|
tom Vol. 68, nr 1
115--133
EN
The analysis of cogging torque, torque ripple and total harmonic distortion of a permanent magnet (PM) flux-switching machine having separate excitation stators is presented in this study. Further, the effect of unbalanced magnetic force (UMF) on the rotor of this machine is also investigated. A comparison of the analysed machine having different rotor pole configurations is also given. The analysis shows that the largest cogging torque, torque ripple as well as total harmonic distortion (THD) are obtained in the four-rotor-pole machine while the least of THD and torque ripple effects is seen in the thirteen-rotor-pole machine. Furthermore, the evaluation of the radial magnetic force of the machines having an odd number of rotor poles shows that the investigated machine having a five-rotor-pole number exhibits the highest value of UMF, while the smallest amount of UMF is obtained in an eleven-rotor-pole machine. Similarly, it is observed that the machines having an even number of rotor poles exhibit a negligible amount of UMF compared to the ones of the odd number of rotor poles.
4
Content available remote Calculation of a Torque Ripple a Three-Phase Asynchronous Motor Supplied by a PWM Controlled Inverter
100%
Záskalický P.
Maszyny Elektryczne : zeszyty problemowe
|
2014
|
tom Nr 2(102)
53--58
EN
The paper deals with steady state analysis of electromagnetic torque ripples of a three-phase induction machine, which is supplied by an IGBT transistors bridge connected inverter. The inverter’s output voltage is controlled by a PWM of the input DC voltage. The complex Fourier series analysis of the inverter’s output voltage was made, to obtain a spectrum of the harmonic supply voltages. The different voltage harmonic was applied to the two-phase asynchronous machine model to obtain the electromagnetic torque waveforms for various operation conditions.
5
Content available Indirect torque observer-based sensor-less efficient control of bearingless switched reluctance motor using global sliding mode and square currents control method
88%
Rao P. N. , Devarapalli R. , Marquez F. P. G. , Kumar G. V. N. , Mohammadi-Ivatloo B.
Archives of Control Sciences
|
2021
|
tom Vol. 31, No. 1
53--80
EN
The Bearingless Switched Reluctance Motor (BSRM) is a new technology motor, which overcomes the problems of maintenances required associated with mechanical contacts and lubrication of rotor shaft effectively. In addition, it also improves the output power developed and rated speed. Hence, the BSRM can achieve high output power and super high speed with less size and cost. It has a considerable ripple in the net-torque due to its critical non-linearity and the salient pole structures of both stator and rotor poles. The resultant torque ripple, especially in these motors, causes the more vibrations and acoustic noises will affects the levitated rotor safety also. Practically at high-speed operations, the accurate measurement of the rotor position is complicated for conventional mechanical sensors. A new square currents control with global sliding mode control based sensorless torque observer is proposed to minimize the torque ripple and achieve a smooth, robust operation without using any mechanical sensors. The proposed controller is designed based on the error between the reference and measured torque values. The sliding mode torque observer measures the torque from the actual phase voltages, currents, and look-up tables. The simulation model has been modelled to validate the proposed methodology. From the simulation outputs, it is clear that the reduction of torque ripple by the proposed method shows improved than the conventional sliding mode controller. The overall system is more robust to the external disturbances, and it also gets efficient torque profile.
6
Content available Research on the influence of driving harmonic on electromagnetic field and temperature field of permanent magnet synchronous motor
88%
Qiu H. , Yu W. , Li Y. , Yang C.
Archives of Electrical Engineering
|
2017
|
tom Vol. 66, nr 2
295--312
EN
At present, the drivers with different control methods are used in most of permanent magnet synchronous motors (PMSM). A current outputted by a driver contains a large number of harmonics that will cause the PMSM torque ripple, winding heating and rotor temperature rise too large and so on. In this paper, in order to determine the influence of the current harmonics on the motor performance, different harmonic currents were injected into the motor armature. Firstly, in order to study the influence of the current harmonic on the motor magnetic field, a novel decoupling method of the motor magnetic field was proposed. On this basis, the difference of harmonic content in an air gap magnetic field was studied, and the influence of a harmonic current on the air gap flux density was obtained. Secondly, by comparing the fluctuation of the motor torque in the fundamental and different harmonic currents, the influence of harmonic on a motor torque ripple was determined. Then, the influence of different current harmonics on the eddy current loss of the motor was compared and analyzed, and the influence of the drive harmonic on the eddy current loss was obtained. Finally, by using a finite element method (FEM), the motor temperature distribution with different harmonics was obtained.
7
Content available Influence of harmonic voltage coupling on torque ripple of permanent magnet synchronous motor
88%
Geng S. , Zhang Y. , Qiu H. , Yang C. , Yi R. , Geng S. , Zhang Y. , Qiu H. , Yang C. , Yi R.
|
8
Content available Research on torque ripple suppression of brushless DC motor based on PWM modulation
88%
Daode Z. , Wei L. , Hu X. , Zhang C. , Li X.
Archives of Electrical Engineering
|
2019
|
tom Vol. 68, nr 4
843--858
EN
Brushless DC motors are often used as the power sources for modern ship electric propulsion systems. Due to the electromagnetic torque ripple of the motor, the traditional control method reduces the drive performance of the motor under load changes. Aiming at the problem of the torque ripple of the DC brushless motor during a noncommutation period, this paper analysis the reasons for the torque ripple caused by pulsewidth modulation (PWM), and proposes a PWM_ON_PWM method to suppress the torque ripple of the DC brushless motor. Based on the mathematical model of a DC brushless motor, this method adopts a double closed-loop control method based on fuzzy control to suppress the torque ripple of the DC brushless motor. The fuzzy control technology is integrated into the parameter tuning process of the proportional–integral–derivative (PID) controller to effectively improve the stability of the motor control system. Under the Matlab/Simulink platform, the response performance of different PID control methods and the torque characteristics of different PWM modulation methods are simulated and compared. The results show that the fuzzy adaptive PID control method has good dynamic response performance. It is verified that the PWM_ON_PWM modulation method can effectively suppress the torque ripple of the motor during non-commutation period, improve the stability of the double closed-loop control system and meet the driving performance of the motor under different load conditions.
9
Content available remote Modelling the Impact of Asymmetrical Phase Parameters on the Torque Waveform of a Permanent Magnet Synchronous Motor
75%
Zhao X. , Corda J. , Mei T. X.
Journal of Applied Computer Science
|
2010
|
tom Vol. 18, nr 2
103-116
EN
The paper presents simulation of phase parameter asymmetries in a permanent magnet (PM) synchronous motor and the analysis of their impact on the instantaneous torque. The torque ripple, which is created by the asymmetries, is simulated for open-loop and vector-control operating modes using a specifically developed mathematical model of the 3-phase asymmetrical machine.
10
Content available Torque ripple calculation of two-phase im supplied by three-leg VSI inverter
75%
Záskalický P.
Maszyny Elektryczne : zeszyty problemowe
|
2017
|
tom Nr 3 (115)
13--17
EN
The proposed paper deals with steady state estimation of a electromagnetic torque ripples and a current waveform of a two-phase induction motor (IM), which is supplied by an three-leg voltage source IGBT bridge connected inverter (VSI). The complex Fourier series analysis of the inverter’s output voltage was made, to obtain an analytical formula of supply voltage waveform. The space phasor theory has been applied to the two-phase induction machine model to obtain electromagnetic torque and supply current waveforms for various operation states.
11
Content available remote Design and Torque Profile Analysis of an Outer-rotor SR Motor with Different Winding Configurations
75%
Cinar M. , Erfan Kuyumcu F.
Przegląd Elektrotechniczny
|
2012
|
tom R. 88, nr 2
328-331
EN
This paper presents an outer rotor in-wheel switched reluctance motor, designed for a cart type electric vehicle. Both of the short and fully pitched winding configurations are developed and analyzed considering the requirements of such a vehicle propulsion motor. Torque profiles and ripple ratios, which are the most important parameters of in-wheel applications are compared for various loading conditions. It is observed that with fully pitched configuration, torque output is increased. However, increasing ripple ratio makes this winding configuration inconvenient for in-wheel propulsion applications, unless any ripple control algorithm is applied.
PL
W artykule zaprezentowano przełączalny silnik reluktancyjny zaprojektowany do pojazdów elektrycznych. Zaprojektowano odpowiednią konfigurację uzwojeń uwzględniając wymagania pojazdu. Głównym wymaganiem był moment napędowy i pulsacje momentu.
12
Content available remote Torque ripple minimization in bldc motor using dc-dc sepic converter
75%
Kumar C. S. , Kumar N. S. , Radhika P.
Przegląd Elektrotechniczny
|
2014
|
tom R. 90, nr 9
146-150
EN
Torque ripple in Brushless dc motors is generally undesirable. Torque ripple causes increased acoustic noise and undesirable speed ripple preventing BLDC motor from achieving high performance. This article presents the method of reducing torque ripple in BLDC motor. This study presents an approach to reduce torque ripples by controlling the voltage while maintaining speed. To get the desired dc link voltage, a singleended primary inductor converter (SEPIC) circuit is used to control the input of the commutation circuit.
PL
W artykule analizuje się możliwości minimalizacji zafalowań momentu napędowego w silniku bezszczotkowym. Zmniejszenie tętnień uzyskuje się przez sterowanie napięcia utrzymującego prędkość. W celu utrzymania pożądanego napięcia dc wykorzystano niesymetryczny przekształtnik typu DSEPIC.
13
Content available Metoda wyznaczania komutacyjnych tętnień momentu silnika PM BLDC
75%
Piwowarczyk R. , Krykowski K. , Hetmańczyk J.
Napędy i Sterowanie
|
2017
|
tom R. 19, nr 12
101--108
PL
W bezszczotkowym silniku prądu stałego komutator mechaniczny zostaje zastąpiony przekształtnikiem energoelektronicznym pełniącym rolę komutatora elektronicznego. W chwilach przełączania poszczególnych uzwojeń fazowych pojawiają się w silniku pulsy prądu. Pulsy te powodują powstawanie tętnień momentu elektromagnetycznego i prędkości kątowej silnika. W artykule zaproponowano prostą metodę określania wielkości tętnień momentu oraz wartości pierwszej harmonicznej momentu elektromagnetycznego. Uzyskane wyniki zweryfikowano za pomocą badań symulacyjnych w programie Matlab/Simulink.
EN
In a brushless DC motor mechanical commutator is replaced by a power electronics converter serving as an electronic commutator. The pulses of the motor current appear in moments of switching individual phase windings. These pulses cause the formation of pulses of electromagnetic torque and angular speed of the motor. This paper proposes the simple method of determining the magnitude of torque pulses. The achieved results have been verified through simulation research in Matlab/Simulink environment performed on a computer model of PM BLDC motor.
14
Content available Research on torque ripple suppression of brushless DC motor based on PWM modulation
75%
Daode Z. , Wei L. , Hu X. , Zhang C. , Li X.
|
15
Content available remote Minimising of electromagnetic torque ripple of reluctance stepper motor
75%
Bernat J. , Kołota J. , Stepień S.
Przegląd Elektrotechniczny
|
2012
|
tom R. 88, nr 9a
200-203
EN
Reluctance stepper motors are commonly used in many cost-sensitive industrial and consumer applications, however they are affected by a large torque ripple, due to construction and phase unbalancing. This, in turn, may cause large vibrations on the load, especially in those systems with flexible elements. This research presents a technique of dynamics improvement by modification of voltage control signal of the variable reluctance stepper motor. The problem is solved by the electromagnetic field modeling using the time – stepping finite element method.
PL
Reluktancyjne silniki krokowe są powszechnie wykorzystywane w wielu aplikacjach przemysłowych, jednakże ze względu na specyficzną budowę i niezrównoważone zasilanie faz silnika są one narażone na duże tętnienia momentu. To z kolei może spowodować duże wibracje na obciążeniu, szczególnie w systemach z elastycznymi elementami. Artykuł prezentuje modyfikację napięcia sterującego, uwzględniając wartości indukcyjności kolejno zasilanych faz silnika. Pole elektromagnetyczne modelu zostało rozwiązane metodą elementów skończonych.
16
Content available remote Układ sterowania maszyną reluktancyjną przełączalną z wykorzystaniem regulatora wielooscylacyjnego pracującego w funkcji kąta do redukcji pulsacji momentu obrotowego
75%
Jackiewicz K. , Straś A. , Bałkowiec T. , Kaszewski A.
Przegląd Elektrotechniczny
|
2021
|
tom R. 97, nr 2
64--67
PL
W artykule przedstawiony został układ sterowania maszyną reluktancyjną przełączalną pozwalający na redukcję tętnień momentu obrotowego. Metoda sterowania bazuje na wykorzystaniu regulatora wielooscylacyjnego (Multioscillatory controller - MOSC) w torze regulacji prędkości obrotowej maszyny. Przedstawiono nowe podejście polegające na zastosowaniu członów oscylacyjnych próbkowanych w dziedzinie kąta położenia wału maszyny w przeciwieństwie do standardowego próbkowania w dziedzinie czasu. Podejście to zapewnia, że charakter zmian prędkości obrotowej jest stały w funkcji kąta położenia wirnika a co za tym idzie próbkując sygnał prędkości względem zmian kąta położenia wirnika można w układzie regulacji zastosować człony oscylacyjne o z góry zdefiniowanych częstotliwościach własnych. Zaproponowany układ sterowania zweryfikowany został z wykorzystaniem modeli numerycznych w środowisku PLECS.
EN
This paper presents control system of a switched reluctance machine for torque ripple reduction. The control method uses oscillatory terms as a part of speed controller. The presented approach uses oscillatory terms in the rotor angle domain (angle sampled), instead of well-known time domain. This method assures synchronization of resonant frequencies of oscillatory terms with the variable rotor speed. The proposed control system is verified with numerical simulations in PLECS software.
17
Content available remote Enhanced direct torque control of a Syn-Rm, using adaptive flux observer, including magnetic saturation and iron losses
75%
Boussouar M. E. , Yahia K. , Cardoso A. J. M. , Sahraoui M.
Przegląd Elektrotechniczny
|
2023
|
tom R. 99, nr 4
255--261
EN
An enhanced direct torque control (E-DTC) system of a synchronous reluctance motor (Syn-RM) is presented in this paper. The motor system is modelled by taking into account its non-linear behaviours such as iron losses and magnetic saturation. The proposed method consists of incorporating hysteresis DTC with a model reference adaptive system (MRAS) flux observer. This technique is applied in order to achieve good torque and flux ripples reduction, which ensure a smooth operation of the Syn-RM along all the speed range. Furthermore, the proposed method has simple design and implementation in the overall control system, and can avoid the drawbacks of conventional flux estimators. Simulation results show the effectiveness of the proposed method.
PL
W artykule przedstawiono udoskonalony układ bezpośredniego sterowania momentem obrotowym (E-DTC) synchronicznego silnika reluktancyjnego (Syn-RM). Układ ruchu jest modelowany z uwzględnieniem jego nieliniowych zachowań, takich jak straty żelaza i nasycenie magnetyczne. Proponowana metoda polega na włączeniu histerezy DTC do wzorcowego obserwatora strumienia adaptacyjnego systemu odniesienia (MRAS). Technika ta jest stosowana w celu uzyskania dobrego momentu obrotowego i redukcji tętnień strumienia, które zapewniają płynną pracę Syn-RM w całym zakresie prędkości. Ponadto, zaproponowany sposób ma prostą konstrukcję i implementację w całym systemie sterowania i pozwala uniknąć wad konwencjonalnych estymatorów strumienia. Wyniki symulacji pokazują skuteczność proponowanej metody.
18
Content available remote Torque Ripple Reduction of Brushless DC Motor on Current Prediction and Overlapping Commutation
75%
Chen Y. , Tang J. , Cai D. , Liu X.
Przegląd Elektrotechniczny
|
2012
|
tom R. 88, nr 10a
247-253
EN
Based on the analysis of the principle of torque ripple with commutation time for brushless DC motor, this paper proposes a method to restrain commutation torque ripple. This method is an improved predictive current control. First, an expression is built about the torque ripple during commutation time. After analysis, the non-commutation phase current is related to torque ripple. Then, a kind of control strategy is designed. A controller is designed with improved predictive current approach to restrain the torque ripple. Next, the model and controllers are implemented in Simulink environment and numerical simulations are performed. Finally, in order to compare the performance of the proposed controller, experiments on other regular controllers are represented on PWM-ON modulation. The designed controller demonstrates much better performance than that of regular PWM-ON modulation controller under tests. Meanwhile, the effect of simulation indicates that the controller is adaptive for speed variation.
PL
W artykule zaproponowano metodę zmniejszenia zafalowań momentu powodowanego komutacją w bezszczotkowym silniku DC. Zakłada się, że niekomutacyjny prąd fazowy jest miara tych zafalowań. Zaprojektowany sterownik bazuje na przewidywaniu prądu. (Zmniejszenie zafalowań momentu w bezszczotkowym silniku DC metodą przewidywania prądu i nakładającej się komutacji)
19
Content available Optimized design of a high-power-density PM-assisted synchronous reluctance machine with ferrite magnets for electric vehicles
75%
Liu X. , Li Y. , Liu Z. , Ling T. , Luo Z.
Archives of Electrical Engineering
|
2017
|
tom Vol. 66, nr 2
279--293
EN
This paper proposes a permanent magnet (PM)-assisted synchronous reluctance machine (PMASynRM) using ferrite magnets with the same power density as rareearth PM synchronous motors employed in Toyota Prius 2010. A suitable rotor structure for high torque density and high power density is discussed with respect to the demagnetization of ferrite magnets, mechanical strength and torque ripple. Some electromagnetic characteristics including torque, output power, loss and efficiency are calculated by 2-D finite element analysis (FEA). The analysis results show that a high power density and high efficiency of PMASynRM are obtained by using ferrite magnets.
20
Content available Electromagnetic torque ripple diminution of a fivephase asynchronous motor with one phase open circuit fault
63%
Záskalický P. , Kaňuch J.
Maszyny Elektryczne : zeszyty problemowe
|
2022
|
tom Nr 1 (127)
51--57
EN
The presented paper deals with the five-phase induction motor (IM) having pentagon connected stator winding, which is working under one phase supply failure. Computation of the motor electromagnetic quantities was made using the space vector theory in the complex plane. Analysis is done assuming, the motor is supplied by a pulse width modulation (PWM) controlled inverter with sufficiently high modulation frequency. Only the first stator voltage harmonics is taken into consideration. On the base of measured IM parameters, trajectories of stator and rotor current space vectors were investigated. On their basis, the motor electromagnetic torque ripple waveform for failure supply mode is derived. Finally a possibility to reduce torque ripple in failure state is shown.
PL
W artykule opisano pięciofazowy silnik indukcyjny (SI) o pięciokątnym uzwojeniu stojana, pracujący przy jednofazowym zaniku zasilania. Obliczenia wielkości elektromagnetycznych silnika przeprowadzono z wykorzystaniem teorii wektorów przestrzennych na płaszczyźnie zespolonej. Analizę przeprowadzono przy założeniu, że silnik jest zasilany z falownika sterowanego modulacją szerokości impulsów (PWM) o odpowiednio wysokiej częstotliwości modulacji. Uwzględniono tylko pierwszą harmoniczną napięcia stojana. Na podstawie zmierzonych parametrów SI zbadano trajektorie wektorów przestrzeni prądów stojana i wirnika. Na ich podstawie wyznaczono przebieg tętnień momentu elektromagnetycznego silnika dla trybu zasilania awaryjnego. Na zakończenie przedstawiono możliwość redukcji tętnień momentu w stanie awaryjnym.
first rewind previous Strona / 2 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.