block diagram of microcontroller based dc motor speed controller
Direct torque control of brushless DC motor with non sinusoidal back EMF
... used Operation of the DTC of a BLDC motor above the base speed is not in the scope of this paper Conventional two-phase conduction quasi-square wave current control causes the locus of the stator ... corresponding three-phase voltage vectors which are used in DTC of a PMSM drive The overall block diagram of the closed-loop DTC scheme of a BLDC motor drive in the constant torque region is represented ... effectiveness of the DTC of a BLDC motor drive in the constant torque region -Ls s3 P doTem i'sc + ios/3 de d(Or,i P 22 e pscx and psp are the a- and f-axis stator flux linkages, respectively A BLDC motor...
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A park like transformation for the study and the control of a nonsinusoidal brushless DC motor
... amount of computations will be reduced by the use of look-up tables The aim of this study was to reach an efficient control of the instantaneous torque of a non-sinusoidal brushless DC motor The ... efficiency of the drive In this work, we will show how an extension of the Park transformation will lead to the 'jxeudo-dq" components of the electric variables The electric equations of the BDCM in ... (fig 5.a) For sinusoidal motors, the effects of such errors are an attenuation of the average torque value and an increase of the copper losses But for a non-sinusoidal BDCM, small torque ripple...
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Direct torque and indirect flux control of brushless DC motor with non sinusoidal back EMF without position sensor
... validity and effectiveness of the sensorless three-phase conduction DTC of a BLDC motor drive with six-switch inverter The Proposed Sensorless DTC of Four-Switch BLDC Motor Drive Using Three-Phase ... Observer Te = αβ / dq 3P r r (ϕ d iqs − ϕ q ids ) Fig 2: Block diagram of the direct torque and indirect flux control of four-switch BLDC motor drive using three-phase conduction mode without position ... conduction DTC of a BLDC motor drive when * is changed from A to -1 A under 0.5 N.m load torque, (a) d-axis r ids stator current, (b) stator flux locus Table Parameters of BLDC motor 0.56 Rs (...
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Direct torque and indirect flux control of brushless DC motor
... III PROPOSED SENSORLESS DTC OF BLDC MOTOR DRIVE USING THREE-PHASE CONDUCTION A Principles of the Proposed Method In this study, indirect torque control method of BLDC motor explained in [29] is ... results of the 356 Fig mode IEEE/ASME TRANSACTIONS ON MECHATRONICS, VOL 16, NO 2, APRIL 2011 Overall block diagram of the position-sensorless direct torque and indirect flux control (DTIFC) of BLDC motor ... MOTOR TABLE I SWITCHING TABLE FOR DTC OF BLDC MOTOR USING THREE-PHASE CONDUCTION indirectly kept at its optimum level, while the motor speed is less than the base speed The switching table for controlling...
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Direct torque control of four switch brushless DC motor with non sinusoidal back EMF
... regulation are showed in Fig for four-switch DTC of BLDC motor drive The overall block diagram of the closed-loop fourswitch DTC scheme of a BLDC motor drive in the constant torque region is represented ... four-switch DTC of a BLDC motor drive TABLE III VOLTAGE VECTOR SELECTION IN SECTORS II AND V FOR FOUR-SWITCH DTC OF BLDC MOTOR DRIVE (CCW) (a) (b) (c) factors such as sampling time, dc- link voltage, ... twophase conduction four-switch DTC of BLDC motor drive Since the upper and lower switches in a phase leg may both be simultaneously off, irrespective of the state of the associated freewheeling diodes...
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Tài liệu Mechatronics DC Motor / Tachometer Closed-Loop Speed Control System ppt
... V @ 0.5 A V @ 1.0 A A schematic diagram of a DC motor is shown in Figure Figure Schematic Diagram of a DC Motor Mechatronics DC Motor / Tachometer Closed-Loop Speed Control System Kevin Craig ... flux density of the original field i = current through the conductor = length of the conductor Figure Operating Principle of a DC Motor Mechatronics DC Motor / Tachometer Closed-Loop Speed Control ... to the assumptions made for the DC motor model, as the analog tachometer is a DC generator - a DC motor in reverse Mechatronics DC Motor / Tachometer Closed-Loop Speed Control System Kevin Craig...
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Báo cáo hóa học: " Research Article Center of Mass-Based Adaptive Fast Block Motion Estimation" doc
... level of (i, j) of a block, (i, j) is the coordinate of the CEM of a block, and (M, N) is the block dimension Based on complexity, (1) require, considerable computation Example For a 16 × 16 block ... P(i, j) Bk (2) (3) where P(i, j) is the binary level of (i, j) of a block, (i, j) is the coordinate of BITCEM of a block, and (M, N) is the block dimension Clearly, by utilizing (2) and (3), multiplication ... where P(i, j) is the binary value of pixel (i, j) of a block and (M, N) is the block dimension Based on the assumption of a rigid object, the transla− tion of a moving zone is M −1 HP(i) = N=01...
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Báo cáo hóa học: " Research Article Low-Complexity Multiple Description Coding of Video Based on 3D Block Transforms" ppt
... encoder needs only the lowest coefficients of 1DDCT For this reason, we use pruned DCT as in [25] The computation of the lowest coefficients of pruned DCT II [26] of size 16 requires 24 multiplications ... the blocks, half of which are coded with the distortion D0 , and half with the shaper distortion Ds Here we assume that all blocks of Description have the same expected distortion as blocks of ... coefficient thresholding The DC coefficients of the transformed shaper volumes are coded by DPCM prediction The DC coefficient of the volume is predicted from the DC coefficient of the temporally preceding...
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Analysis, design and implementation of high performance control schemes in renewable energy source based DC AC inverter for micro grid application
... 4.3 Phasors diagram of the inverter quantities when Pg = 79 4.4 The general control diagram of the proposed inverter 80 List of Figures xxvii 5.1 The block diagram of the proposed ... voltage, vdcp , with grid power command, (b) zoomed DC link voltage, vdc (in DC coupling), DC link split capacitor voltage, vdcp , with grid power command, (c) b) zoomed DC link voltage, vdc (in ... Inverse of fundamental grid frequency (rad/sec), Ts Sampling time of the controller UC Mean capacitor voltage ulf Output of Lypunov function based controller usrc Output of spatial repetitive controller...
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FAULT DIAGNOSIS OF PERMANENT MAGNET SYNCHRONOUS MOTOR BASED ON MECHANICAL AND MAGNETIC CHARACTERISTIC ANALYSIS
... variation of the air-gap of axial edgy of the spindle motor 58 Figure 5.1: Geometry of 12S5PP SUMP motor 66 Figure 5.2: FEM of 12S5PP SUMP motor 67 Figure 5.3: Flux lines of ... components of SUMP in the orthogonal of the offset direction 70 Figure 5.10: DUMP of 12S5PP motor in x direction with different dynamic eccentricity 74 Figure 5.11: DUMP of 12S5PP motor in y ... presence of a motor cooling system CHAPTER INTRODUCTION fault or motor phase circuit open fault In order to avoid damaging the motor by over-heating, the temperature of motor and the crack of rotor...
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Numerical analysis of a brushless permanent magnet DC motor using coupled systems
... dynamic behaviours of the BLDC motor List of Figures 1.1 Typical configurations of a DC motor and a PMDC commutator motor 1.2 Typical configuration of a PMSM ... calculation of steady-state current, cogging torque and back-emf in time domain and determination of torque -speed characteristics of the BLDC motor BLDC motors cannot work without the electronic controllers ... rotor BLDC motor configuration 1.4 Exterior rotor BLDC motor configuration 1.5 Axial field type BLDC motor configuration 1.6 Basic components of the BLDC motor...
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DC motor position and speed tracking (PAST) system using neural networks
... Training 34 ANN Model of DC Motor 38 3.5.1 Structure of the AIM 39 3.5.2 Performance Evaluation of the AIM 40 3.6 Speed Tracking of DC Motor Using AIM 41 3.7 Position and Speed Tracking (PAST) ... model of the PAST system 3.2 Model of the DC Motor DC motors have been used in advanced control algorithms in DC drives because of their stable and straightforward characteristics The DC motor ... for PMDC Motor 66 4.7 Position and Speed Tracking (PAST) System for the PMDC Motor 4.8 4.9 72 Training ANN Inverse Model (AIM) of the PMDC Motor with Position Input 81 Open Loop Performance of the...
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A study to indicate the importance of consumer based-brand equity on consumer perception of brand (a case study of fast food restaurants).pdf
... our sample profile and that of both fast food restaurant profiles gives us a reasonable ground to conclude that our sample profile is a representative of the actual customer profile of both fast ... students of BTH who are customers of both restaurants We decided to use the student of BTH because from the customer profile of MacDonald and Max hamburger, customers between the age of 18 and ... profile, when compared with the customer profile sample of both fast food restaurants, one check was carried out Our respondent’s demographic profile was compared with the customer profile of...
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Báo cáo y học: "Enhancement of the Click Chemistry for the Inverse Diels Alder Technology by Functionalization of Amide-Based Monomers"
... elucidates the product of 14 after the complete DARinv -based ligation of the penta-amide (pentenoic acid building blocks) as a dienophile component with five diene molecules of dimethyl-1,2,4,5-tetrazine-3,6-dicarboxylate ... Figure the scheme exemplifies the amide backbone -based pentamer consisting of three Reppe Anhydride monomers and two pentenoic acid building blocks SPPS of the pentenoyl-pentamers II & the mixed Reppe ... III: We also produced mixed pentamers composed of the Reppe Anhydride building block (m/e 928.3 calc 927.5) and of the pentenoic acid building block (Mass spectrum: 1667.5, calc 1665.9) for chemical...
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Testing a model of customer-based brand equity in the Vietnamese banking servic
... classified based on characteristics of the data, source of the data, the purpose of research or the frequency of study 27 Based on the purpose of research, researchers often use one of the following ... scope of the study is also addressed in this chapter At the end of the chapter, the structure of this study is provided The Outline of this chapter is shown in figure 1.1 Figure 1.1 Outline of chapter ... nurture customer -based brand equity in Vietnamese banking service? 1.5 Scope and methodology of the study 1.5.1 Scope of the study In the banking sector of Vietnam, there are four types of bank: the...
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UNIVERSITY TEACHER’S CONCEPTUALIZATION OF TASK-BASED TEACHING: A CASE study IN taybac university
... overview of the issues, statement of the problem, purpose of the study, research questions, significance of the study, limitations of the study, definition of terms, and organization of the study ... Council of Europe development of a syllabus for learners based on functional–notional concepts of language use and a threshold level of language ability was described for each of the languages of ... favor of units based on topics or themes in which Halliday's (1985) three groups of macrofunctions are divided into microfunctions, each linked with certain grammatical structures Nunan's task-based...
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Bộ điều khiển số PID điều khiển DC motor
... thành loại sau: + Động điện DC kích từ nam châm vĩnh cửu + Động điện DC kích từ độc lập + Động điện DC kích từ nối tiếp + Động điện DC kích thích song song + Động điện DC kích từ hỗn hợp (Gồm cuộn ... Mô hình hệ thống động điện DC Từ sơ đồ cấu trúc ta tìm hàm truyền đạt : kT W ( s )motor= (Rư+Lư s )(b+Js ) 1+ kT2 = kT ( Rư +Lư s )( b+Js )+k2T (Rư+Lư s)(b+Js) W ( s )motor = kT Rư ∙b L J k2 + s ... so sánh cho ADC - Chân 32 : AREF điện áp so sánh tín hiệu vào ADC - Chân 33 đến 40 : Cổng vào liệu song song A ( PORTA ) tích hợp chuyển đổi tín hiệu tương tự sang tín hiệu số ADC ( analog to...
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A STUDY ON SOLUBILIZATION OF EXCESS SLUDGE BY HIGH SPEED ROTARY DISK PROCESS
... treatment of high concentration of sludge; 2) investigation of optimal operating condition; 3) extent of improvement of lower molecular through hydrolysis; 4) estimation of the existence of biomass; ... definition of “solubilization” If biodegradability of samples is used as explanation of solubilization, the definition of this basic standard should be necessary From the view of the change of the ... high speed rotary disk to high speed rotary disk recirculation pump cooler Pump hopper variable gap motor seramic disk ceramic disk water out water in Fig.1 Experimental apparatus of high speed...
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