control of induction machine drives

... Variation of DC bus voltage of a 3-in case of open loop PI control for constant V/f control method Figure 4.12: Variation of Torque of a 3-in case of open loop PI control for constant V/f control ... developments in speed control methods of the induction motor have led to their large scale use in almost all electrical drives Out of the several methods of speed control of an induction such as ... 4.15: Variation of Stator current of a 3-in case of closed loop PI control for constant V/f control method Figure 4.16: Variation of DC Bus Voltage of a 3-in case of closed loop PI control for...

Ngày tải lên: 18/12/2013, 22:06

... thành loại: (1) điều khiển thích nghi tối u (Adaptive Control With Optimization - ACO) (2) điều khiển thích nghi theo điều kiện giới hạn (Adaptive Control With Constraints - ACC) Hệ ACO điều khiển ... On-line giá trị lực cắt, chuyển thành tín hiệu điện áp để cung cấp cho điều khiển (AC Controller) - Chức AC Controller đợc thực nhờ PC, có cắm card thu nhận xử lý tín hiệu PCL-812 PG hãng Advantech ... Production Systems, and Computer Integrated Manufacturing Printice-Hall, 1987 Yoram Koren: Computer Control of Manufacturing Systems McGraw-Hill, 1983 Japanese National Research Institute: Mechanical...

Ngày tải lên: 10/12/2013, 13:16

... voltage of the AC-AC voltage controller Induction machine Fig 6.5: Speed control of an induction machine by stator voltage variation 6.3 Speed Control of Slip Ring Machines by Addition of Resistance ... principle of operation of an AC-AC controller is very simple, analysis of the system of Fig 6.5 is extremely tedious even for steady-state operation This is so because of the inductive nature of the machine, ... method of speed control of induction machines Finally, a method valid for slip-ring machines only, insertion of a resistance in the rotor circuit, will be considered as well 6.2 Speed Control...

Ngày tải lên: 11/07/2014, 05:20

... classification of vibration signatures result summary 88 Table 6.1: Similarity measures of same-indexed pair of machine current IMFs at 20Hz 98 Table 6.2: Similarity measures of same-indexed pair of machine ... currents of the induction motor This method is referenced from Peter Vas, “Parameter Estimation, Condition monitoring, and diagnosis of Electrical Machines” Using the dynamic model of an induction machine, ... measures of same-indexed pair of machine current IMFs at 40Hz 98 Table 6.4: Frequency band for HTY30 (IMF 5-9) machine current signature 100 vi LIST OF FIGURES Figure 1.1: Approaches of this...

Ngày tải lên: 03/10/2015, 21:57

... classification of vibration signatures result summary 88 Table 6.1: Similarity measures of same-indexed pair of machine current IMFs at 20Hz 98 Table 6.2: Similarity measures of same-indexed pair of machine ... currents of the induction motor This method is referenced from Peter Vas, “Parameter Estimation, Condition monitoring, and diagnosis of Electrical Machines” Using the dynamic model of an induction machine, ... measures of same-indexed pair of machine current IMFs at 40Hz 98 Table 6.4: Frequency band for HTY30 (IMF 5-9) machine current signature 100 vi LIST OF FIGURES Figure 1.1: Approaches of this...

Ngày tải lên: 04/10/2015, 07:58

... current controllers [ll-151 The direct digital control of an inverter provides the possibility of designing an instantaneous torque controller The concept is illustrated in Fig The combination of ... objectives of minimisation of torque ripples and improvement of the transient and steady-state responses of speed and position control The focus is on the digital approach to torque control, whereby ... consists of three pairs of power MOSFETS Each pair operates in a toggle s;>o -1 i=dorq s;

Ngày tải lên: 03/01/2014, 19:52

... and speed control of induction motors The induction motor equivalent circuit The current control algorithm The new sensorless motor control strategy Induction motor controller ... open-loop control systems 4 Neural and Fuzzy Logic Control of Drives and Power Systems (E) The method of generating the control pulses: • Single-channel control systems • Multi-channel control ... electrical drives, especially for a.c electrical drives 1.3 Control systems for a.c drives A specific definition of a process control system may be: ‘A control system is a combination of amplifiers,...

Ngày tải lên: 18/04/2014, 12:29

... phosphorylation of eIF-2α and inhibition of translation caused by the expression of HCV polyprotein PKR mediates phosphorylation of eIF-2α and inhibition of translation caused by the expression of HCV ... analysis of the extent of inhibition of protein synthesis and of eIF2α-S51 phosphorylation indicates that such effects are clearly observed by h.p.i in VT7-HCV7.9 infected cultures in the presence of ... disruption of the golgi apparatus Expression of HCV polyprotein from VV inhibits the production of vaccinia virus To determine the impact of HCV gene expression on the replication of the recombinant...

Ngày tải lên: 19/06/2014, 08:20

... phosphorylation of eIF-2α and inhibition of translation caused by the expression of HCV polyprotein PKR mediates phosphorylation of eIF-2α and inhibition of translation caused by the expression of HCV ... analysis of the extent of inhibition of protein synthesis and of eIF2α-S51 phosphorylation indicates that such effects are clearly observed by h.p.i in VT7-HCV7.9 infected cultures in the presence of ... disruption of the golgi apparatus Expression of HCV polyprotein from VV inhibits the production of vaccinia virus To determine the impact of HCV gene expression on the replication of the recombinant...

Ngày tải lên: 20/06/2014, 04:20

... structure of control object Figure 4.2: The block diagram of the control object 4.3 Designing controllers 4.3.1 Overview of fuzzy control system 4.3.2 Designing of PID controller tuning fuzzy to control ... energy from main machine 1.2.2 The electrical structure of of shaft generator 1.3 The general diagram of the control system of shaft generator using doubly-fed induction machine The control circuit ... the new control structure of the doubly-fed induction machine in shaft generator on shipboards basing on the rotor similar signal method The control structure of the doubly-fed induction machine...

Ngày tải lên: 02/07/2014, 20:34

... product region of the chromatogram to calculate the amount (pmol) of 14Clabeled product formed The rate of urate oxidation in milliunits per ml of plasma is then calculated (1 unit = µmol of urate ... strands of K mPEG [18] 011, and of of case, course plasma uricase activity, in IgG elimination' subjects 002, Time and 013 appearance of IgM and 'earlyantibodies against PEG-uricase, and of plasma ... specificity of IgG antibody against PEG-uricase Increasing amounts of the indicated materials were added to aliquots of plasma obtained from subject 013 on day 14 after subcutaneous injection of 12 mg of...

Ngày tải lên: 09/08/2014, 07:20

... Vector control of a doubly fed induation generator for stand-alone ship shaft generator systems, IEEE China, 2007 website: www.schneider-electric.co.uk/sites/uk /en/products-services/automation -control/ ... www.schneider-electric.co.uk/sites/uk /en/products-services/automation -control/ products-offer/motion-and -drives/ variablespeed -drives- low-voltage/altivar-71.page VCM2012 GS.TSKH Thân Ngọc Hoàn nhận Kỹ sư...

Ngày tải lên: 25/07/2015, 07:24

... Algorithms for Control of Uncertain Systems with Application to Hard Disk Drives Mohammadreza Chamanbaz B.Sc., Shiraz University of Technology (SUTECH) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY ... Appendix 3.9.1 Proof of Theorem 3.2 3.9.2 Proof of Theorem 3.3 3.9.3 Proof of Theorem 3.1 Application ... Track Following Control of Hard Disk Drives Using the developed randomized algorithms, we solved a challenging industrial problem regarding the track following control of hard disk drives In particular,...

Ngày tải lên: 09/09/2015, 11:33

... is required to control the duration of the switches’ ON and OFF times Three PWMs are required to control the upper three switches of the power inverter The lower switches are controlled by the ... frequency of the motor P = number of poles in the motor Squirrel Cage Motor Note 1: The number of poles is the number of parallel paths for current flow in the stator 2: The number of poles is ... Typical code section of accessing and scaling of the PWM duty cycle is as shown in Example TIMING DIAGRAM OF HARDWARE AND SOFTWARE PWMS TMR2 to PR2 Match Timer1 Overflow Hardware PWM Software PWM Cycles...

Ngày tải lên: 11/01/2016, 14:28

... address of sine table in RAM is loaded to FSR BANKSEL TABLE_OFFSET2 MOVF TABLE_OFFSET2,W ;Table_offset2 is copied to WREG ADDWF FSR,F ;Address to be read = Sine table base adress + Table_offset2 ... address of sine table in RAM is loaded to FSR BANKSEL TABLE_OFFSET3 MOVF TABLE_OFFSET3,W ;Table_offset3 is copied to WREG ADDWF FSR,F ;Address to be read=Sine table base address + Table_offset3 ... is removed Note: Refer to Appendix B: “Motor Control Schematics” for schematics of the motor control demo board FIGURE 6: BLOCK DIAGRAM OF THE MOTOR CONTROL DEMO BOARD Single-Phase AC Input Rectifier...

Ngày tải lên: 11/01/2016, 14:35

... notion of using SGLT inhibitors as a means to control circulating levels of glucose The selective inhibition of hSGLT2 by thioglycoside I, which is responsible for most of the reabsorption of glucose ... used to determine the amount of ATP in mg of protein measured from the number of cells per well After 24 h, the microtiter plate was taken for scintillation counting of radioactive [14C]AMG using ... non-transfected CHO cells (controls) Results are the mean of six different experiments Error bars represents standard deviations * p < 0.01 shows significantly higher induction of cell membrane depolarization...

Ngày tải lên: 26/10/2012, 10:04

... birth In Hungary 25.2% of congenital abnormalities were prevented by these methods Previously the selective abortion, i.e termination of pregnancy after the prenatal diagnosis of severe fetal defects ... Hungary about 20% of major congenital abnormalities (8.7% in the total group) were terminated after the prenatal diagnosis of defects Tertiary prevention: complete recovery of congenital abnormalities ... for their prevention Conflict of interest The author has declared that no conflict of interest exists References Czeizel AE, Intődy Z, Modell B What proportion of congenital abnormalities can...

Ngày tải lên: 02/11/2012, 11:12

... mixing duration (15 minutes) was decided from the results of kinetic batch experiments The pH of all solutions of the batch experiments were controlled to 7.0 using HCl and NaOH solutions during ... the schematic diagram of a typical laboratory-scale MBR experiment Each reactor was made of plexiglass and had a designed working volume of 10 L A flat sheet membrane made of chlorinated polyethylene ... 10 L/day with 1,000 mg/L of biological oxygen demand (BOD), 50 mg/L of nitrogen and 25 mg/L of phosphorus The experiments were conducted at a sludge retention time (SRT) of 33 days and the hydraulic...

Ngày tải lên: 05/09/2013, 10:15

... to control the temperature of a building and have obtained impressive results The fuzzy control method of Zadeh [17] has also been widely used for control of many nonlinear systems; a fuzzy control ... self-adapting controller which changes as the input changes There are two disadvantages of the DMC controller First, the DMC controller is a local controller which can only guarantee the stability of the ... DMC controller to control the displacement ventilation HVAC system The control results using the DMC controller are analyzed and compared with those obtained from another controller The DMC controller...

Ngày tải lên: 05/09/2013, 16:11

... Microsoft host controller driver uses the SOF MODIFY register When the Microsoft host controller driver takes control of the host controller from the BIOS, it always reads the value of the SOF MODIFY ... Microsoft host controller driver uses the SOF MODIFY register When the Microsoft host controller driver takes control of the host controller from the BIOS, it always reads the value of the SOF MODIFY ... Microsoft host controller driver uses the USBCMD register When it takes control of the host controller from the BIOS, the Microsoft host controller driver clears the RS bit to stop the host controller...

Ngày tải lên: 07/10/2013, 00:20