... significantly reduced with the use of segmented PI controller. Inductionmotor startup is one of the most demanding situations for the power system, and the use of a segmented PI controller ... is performed and a series of random changes in magnitude and frequency is presented. pthe error when a motor load is started. The parameters of the inductionmotor are the ones of table 6: ... direction) at the crest of *av . Next, we will express aet by the Fourier series of a triangular pulse-train having an instantaneous duty cycle Dt and an instantaneous frequency iaft...
... quick-response and high efficiency control strategies ofaninduction motor, ” IEEE Trans. Ind. Appl., vol. 22, no. 5, pp. 820–827, Sep./Oct. 1986. [2] M. Depenbrock, “Direct self -control of inverter-fed ... reported to controlof BLDC motorusing six-switch three-phase inverter (SSTPI). Direct torque control (DTC) scheme was first proposed by Takahashi [1] and Depenbrock [2] for induction motor drives ... αsV and βsV and currents αsi and βsi, then by using (1) and (4) q- and d-axis flux linkage are drived. Also, by usig (4) q- and d-axis current are calculated. Finally, by using...
... constant and it isproportional to irqs; therefore, an indirect flux control can beachieved in the proposed DTC of BLDC motor drive.Although irqsis assumed constant meaning that it has an offsetto ... instantaneouslycontrolled by the torque controller using the integral variablestructure control (IVSC) and the space-vector PWM (SVPWM).However, this technique increases the complexity of the ... andsimplicity in their control [1]–[3].In many applications, obtaining a low-frequency ripple-freetorque and instantaneous torque and even flux control are of primary concern for BLDC motors with nonsinusoidal...
... 20036ArticleCharacterization of the Polymorphic Behavior ofan Organic Compound Using a Dynamic Thermal and X-ray Powder Diffraction Technique David Albers, Michelle Galgoci, Dan King, Daniel Miller,Robert Newman, Linda ... of the Polymorphic Behavior ofan Organic Compound Using aDynamic Thermal and X-ray Powder Diffraction Technique David Albers,‡Michelle Galgoci,†Dan King,‡Daniel Miller,†Robert Newman,*,‡Linda ... endotherm between 100and 120 °C (also due to water loss), and a melt onset between189 and 196 °C (with an apparent heat of fusion of 25–40 J/g).A representative DSC scan of Form III samples...
... một modem không dây hay GSM Modem, do đó chúng ta hoàn toàn có thể điều khiển được ĐTDĐ qua tập lệnh AT do Viện Tiêu Chuẩn Viễn Thông Châu Âu (EuropeanTelecommunication Standards Institute - ETSI) ... khiển Pic16f877A tích hợp sẵn bộ chuyển đổi ADC 10 bit do đó ta sẽ sử dụng các chân đầu vào analog (AN0 -AN7 ) làm các chân đo nhiệt độ của các thiết bị. Các chân từ D0-D6 sẽ làm 7 chân đầu ra điều ... trung tâm SMS đã giúp người sử dụng truy cập nhanh chóng tới các hệ thống thông tin thông qua mạng nhắn tin GSM- SMS. Với những lợi ích từ hệ thống GSM (không dây), dữ liệu có thể được truy nhập...
... perform-ance withan average accuracy of 96.5%, while the face-based method had an accuracy of 87.5% and the head-band-based method had an accuracy of 88%. In experi-ments, the face and headband based ... travelling on an uphill (or downhill) place, theheadband method often missed the go-straight and stopcommands. And the face-based method often misseduser's face so that it cannot track ... inclination. (a) the commands of turn-left, (b) the commands of turn-right. Journal of NeuroEngineering and Rehabilitation 2009, 6:33 http://www.jneuroengrehab.com/content/6/1/33Page 9 of 17(page number...
... desired performancelevel. The technique uses any one of the TSI rays to identifyitsangleofarrivalinazimuthplaneaswellasinelevationplane and then locates the position of the transmitter. How-ever, ... channel, σ2nis the whitenoise power present in any channel and INis the unit iden-tity matrix. Without loss of generality, we use the notation s1and s2to represent s(ϕ1, θ1)ands(ϕ2, ... investigation of the perfor-mance of the TSI finder as a function of the sample size used,we have included (Figure 6)aMonteCarlosimulationofsce-nario 1. Ninety simulations were run, and an estimate of...
... 1Scholander P.F., Love W.E. & Kanwsher J.W.(1955) The rise of sap in tall grapevines. PlantPhysiol. 30, 93-104Sucoff E. (1969) Freezing of conifer xylem andthe ... 1094-1099Zimmermann M.H. (1983) In: Xylem Structureand the Ascent of Sap. Springer-Verlag, Berlin,pp. 143 Detection of cavitation events upon freezing and thawing of water in stems using ... Universi-ty of Firenze, Italy, using 3 yr old potted plants of E. occidentalis Endl., and 4 yr old excisedlateral branches of A. excelsa R. Br. All plantshad been acclimated...
... conceptualised and planned the study, collected andanalysed the data, and drafted the manuscript. The second author advisedon study design and writing of the manuscript. Both authors read andapproved ... involvement of t herapyassistants. Role sharing and expansion are examples of organisational interventions [35]. A more in-depthexamination of how therapists can maximise their rolesmay be of benefit ... Smallchanges i n practice, with large variations across teamscan be expected with the first wave of implementation.Changes in the vicinity of 50% to 75% are unrealistic[18], and cannot be...
... outputs ofaninduction motor, we can use this motor controller to controlaninduction machine. ã TMS320F243 DSP controller. This is manufactured by the Texas Instruments Company and is one of ... principles for aninduction motor An inductionmotor is an asynchronous AC (alternating current) motor. The least expensive and most widely used inductionmotor is the squirrel cage motor. The ... cage inductionmotor and the “wound motor . An explanation of the advantages and disadvantages of each is given. Essential concepts such as “synchronous speed , “slip”, “torque” and the rated...