AN1292 sensorless field oriented control (FOC) for a permanent magnet synchronous motor (PMSM) using a PLL estimator and field weakening (FW)

Use of an extension of the park's transformation to determine control laws applied to a non sinusoidal permanent magnet synchronous motor

... knowledge of the non sinusoidal permanent magnet synchronous motor We are so able as well to analyse the classical control laws such as 120' voltage control for example, as to deduce of this new ... electromotiveforces, the motor being not supply Park's transformation AAer this first transfoxmation, the Pa& transfomation allows us to work in the rotor's reference, through a rotation of an angle PO.Using the ... PROPOSAL OF AN EXTENSION OF THE PARK'S TRANSFORMATION Classical Park's transformation is in fact the succession of two transfomations The torque is then given by: T, = p.(@~,.io+@'did+@'q.iq) For a...

Standards for efficiency of electric motors permanent magnet synchronous motor technology

... and R McElveen, “InIMPORTANCE OF duction vs permanent magnet motors, ” IEEE now profit from the advantages of PM Ind Applicat Mag., vol 15, no 6, pp 28–35, motors For single-speed applications, ... high motor efficiency when the motor is designed for and operated at 60 Hz instead of 50 Hz The difference in efficiency between 50 and 60 Hz varies with the number of poles and the size of the motor ... 0.1 10 Motor- Rated Power (kW) 100 IE3 Efficiency Levels for 50 Hz IE3 Efficiency Levels for 60 Hz Adapted Ultrapremium Efficiency Levels for 50 Hz Commercial Ultrapremium Efficiency Levels for 60...

Điều khiển động cơ không đồng bộ theo phương pháp Field oriented control (FOC) sử dụng bộ điều khiển mờ

... vector không gian ñư c s d ng ñ ñi u n ñ ng cơ, có hai phương pháp chính: + ði u n ñ nh hư ng trư ng (Field Oriented Control) bao g m: phương pháp ñi u n vectơ tr c ti p (Direct Vector Control) phương ... “h p ñen”) K t h p tính ưu vi t c a phương pháp ñi u n khác nhau, lu n văn trình bày k thu t “ði u n ñ ng không ñ ng b theo phương pháp FIELD ORIENTED CONTROL (FOC) s d ng b ñi u n m ” (áp d ng ... mà không cҫn mô hình toán KӃt hӧp tính ѭu viӋt cӫa phѭѫng pháp ÿiӅu khiӇn khác nhau, luұn văn trình bày kӻ thuұt “ĈiӅu khiӇn ÿӝng cѫ không ÿӗng bӝ theo phѭѫng pháp FIELD ORIENTED CONTROL (FOC)...

Hybrid Control Design for a Wheeled Mobile RobotThomas Bak 1 docx

... the approach taken in [5] and [6] Based on this nonlinear model, we design a path tracking control law based on feedback linearization Feedback linearization designs have the potential of reaching ... systems) A straightforward analysis will show that the system can always be rendered unstable: Just vary the reference input such that transitions are always taken before the transition safe state ... congurations the standard approach from here on is to transform the states into normal form via an appropriate dieomorphism followed by feedback linearization of the nonlinearities and a standard...

Báo cáo hóa học: " A Sigma-Delta ADC with Decimation and Gain Control Function for a Bluetooth Receiver in 130 nm Digital CMOS" pdf

... San Francisco, Calif, USA, February 2002 J Koh, K Muhammad, B Staszewski, G Gomez, and B Horoun, A sigma-delta ADC with a built -in anti-aliasing filter for Bluetooth receiver in 13 0nm digital ... ADC helps distributing the AGC function between the ADC and the intermediate frequency SIGMA-DELTA ADC DESIGN FIR antialiasing filter and decimation The diagram in Figure shows a switched capacitor ... sigma-delta ADC has been successfully implemented and characterized in a 1.5 V 130 nm digital CMOS technology The built -in antialiasing filter and a two-step gain control are merged into the sampling...

Báo cáo hóa học: " ITERATIVE SCHEMES WITH SOME CONTROL CONDITIONS FOR A FAMILY OF FINITE NONEXPANSIVE MAPPINGS IN BANACH SPACES" docx

... points of families of nonexpansive mappings, J Math Anal Appl 211 (1997), no 1, 71–83 N Shioji and W Takahashi, Strong convergence of approximated sequences for nonexpansive mappings in Banach ... fixed points of nonexpansive non-linear mappings in Banach spaces, Arch Rational Mech Anal 24 (1967), 82–90 Y J Cho, S M Kang, and H Zhou, Some control conditions on iterative methods, Comm Appl ... Math Anal Appl 194 (1995), no 1, 114–125 J G O’Hara, P Pillay, and H.-K Xu, Iterative approaches to finding nearest common fixed points of nonexpansive mappings in Hilbert spaces, Nonlinear Anal...

Hybrid Control Design for a Wheeled Mobile Robot docx

... the approach taken in [5] and [6] Based on this nonlinear model, we design a path tracking control law based on feedback linearization Feedback linearization designs have the potential of reaching ... systems) A straightforward analysis will show that the system can always be rendered unstable: Just vary the reference input such that transitions are always taken before the transition safe state ... standard approach from here on is to transform the states into normal form via an appropriate dieomorphism followed by feedback linearization of the nonlinearities and a standard linear control design...

Sensor based control architecture for a car like vehicle

... detected Free-lane description Local map building + FAILURE yes Lane changing FAILURE Reaching an appropriate start location Free-lane reached Free-space parameters Trajectory tracking Generation-execution ... of appropriate Local Trajectory backward & forward motions no Updating no Success ? local map Obstacle overtaken ? yes Nominal trajectory to reach yes Lane changing SUCCESS yes Nominal trajectory ... Parallel Parking Trajectory Following Nominal Trajectory yes Goal reached ? Trajectory tracking obstacle detection no no Obstacle avoidance possible ? Find a parking place Free parking place...

Sensorless drives for permanent magnet synchronous motors

... and its ZCP waveforms based on modified algorithm Captured voltage and current waveforms for VDC = 5V Captured voltage and current waveforms for VDC = 8.48V Captured waveforms for VDC = 8.48V ... drive is conventionally applied on BLDC motors, a class of permanent magnet motors with trapezoidal back-EMFs, for smooth torque production In three phase BLDC drives, the motor is typically driven ... proposed for BLDC motors [19], motors with trapezoidal back-EMFs which have been extended to PMSM [22] The back-EMFs for these motors contain a third harmonic component which can be utilized for the...

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Analysis, design and control of permanent magnet synchronous motors for wide speed operation

... Torque performance of SVM based DTC and Current Control for a wide speed operation 169 6.26 Power performance of SVM based DTC and Current Control for a wide speed operation ... Control of IPMSM in Wide Speed Operation 24 Outline of the Thesis 25 Analysis of Interior Permanent Magnet Synchronous Motors for Wide- Speed Operation ... presents aspects of analysis, design and control of permanent magnet synchronous motors (PMSMs) for wide- speed operations An analytical method has been developed based on d- and q- axis equivalent...

Báo cáo y học: "Setting priorities for the health care sector in Zimbabwe using cost-effectiveness analysis and estimates of the burden of disease" pot

... DALY of a range of health interventions representing the situation in the health care sector at the time of study Before this study, there was only very limited and scattered information on the ... this paper is therefore to provide input into an analysis of identifying ways of improving the allocative efficiency of resource utilisation in the health care sector of Zimbabwe The general research ... DALY of less than 20% for the majority of the 65 interventions included in the study In addition, the majority of interventions had shifted their rank by three places or less in the rank order of...

Báo cáo sinh học: " The eﬃciency of designs for ﬁne-mapping of quantitative trait loci using combined linkage disequilibrium and linkage" doc

... relevant for the efficiency of LD mapping as it will affect the LD pattern of marker haplotypes surrounding the QTL The aim of this study is to investigate the efficiency of various experimental designs for ... which consists of the average of the Hessian matrix and the Fisher information matrix RESULTS 3.1 Efficient designs for fine-mapping of QTL The effect of family structure on accuracy of QTL mapping ... column vector of the first derivatives of the log likelihood Efficiency of designs for fine-mapping of QTL 151 function with respect to each variance component, and AI is the average information matrix...

Computational analysis of a permanent magnet synchronous machine using numerical techniques

... is vital to machine analysis as it is a fast and low-cost way of predicting machine performances Traditional analytical methods, such as lumped parameter models are computationally fast and simple ... It also deals with the parameter estimation of permanent magnet synchronous machines using both experimental and computational methods A line-start interior permanent magnet synchronous machine ... Permanent Magnets The properties and performances of a permanent magnet machine are greatly affected by the characteristics of permanent magnets Therefore proper representation of permanent magnet...

Numerical analysis of a brushless permanent magnet DC motor using coupled systems

... to characterize the material Another type of material that is characterized by a broad hysteresis loop is called hard magnetic material 1.3.1 Hard magnetic materials (Permanent magnets) Permanent ... commutator motor: The construction of a permanent magnet DC motor( PMDC) is similar to a DC conventional motor with the electromagnetic excitation system replaced by permanent magnets A PMDC commutator ... have made using BLDC motor a viable alternative The developments and applications of the BLDC motors have been greatly accelerated by improvements in permanent magnet materials, especially rare-earth...

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Formation of Aerobic Granular Sludge in a Continuous-Flow Reactor – Control Strategy for the Selection of Well-Settling Granular Sludge

... Formation of Aerobic Granular Sludge Two AUFB reactors were used for the formation of aerobic granular sludge Air was introduced from the bottom of the reactor, and aeration rate was gradually increased ... in a continuous-flow reactor Both surface loading and aeration rates affect the selection of well-settling sludge and the formation of aerobic granular sludge By setting and controlling adequate ... decided the control strategy for the selection of well-settling sludge Then, we applied the strategy to the formation of aerobic granular sludge in a continuous experiment In addition, the effect of...

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