single phase ac induction motor with and without a start mechanism

Tài liệu AC Induction Motor Fundamentals docx

Ngày tải lên : 25/01/2014, 13:20

... following sections SINGLE- PHASE AC INDUCTION MOTOR WITH AND WITHOUT A START MECHANISM Capacitor Rotor Input Power Main Winding Single- Phase AC Induction Motor without Start Mechanism  2003 Microchip ... Centrifugal Switch Rotor Input Power Main Winding Start Winding Single- Phase AC Induction Motor with Start Mechanism DS0088 7A- page AN887 Split -Phase AC Induction Motor The split -phase motor is also ... cycle rates or high torque Capacitor Start AC Induction Motor This is a modified split -phase motor with a capacitor in series with the start winding to provide a start “boost.” Like the split-phase...

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SINUSOIDAL PWM OPERATION OF AN AC INDUCTION MOTOR CONTROLLER

Ngày tải lên : 17/12/2013, 18:06

... on state H FUNDAMENTAL AND HARMONICS The fundamental voltage and the harmonics for an example of ma = and m f = 47 is calculated below for a normalized voltage and a 60 Hz supply Since ma = 0.9 ... control IC FET gate-emitter forward leakage current Bootstrap capacitor leakage current Note: Factor is only relevant if the bootstrap capacitor is an electrolytic capacitor, and can be ignored ... of a motor are affected by the applied voltage and frequency Inductive reactance can increase current and heat up the motor The duty cycle is a measure of the ratio of the applied voltage and...

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AN1162 sensorless field oriented control (FOC) of an AC induction motor (ACIM)

Ngày tải lên : 11/01/2016, 16:47

... certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona; Gresham, Oregon and design centers in California and India The Company’s quality ... Technology Inc Hardware DS0116 2A- page AN1162 SPEED AND ANGLE ESTIMATOR The speed and angle estimator (shaded area in Figure 3) have as inputs, the fixed reference stator frame, two axes voltages and currents ... enhanced code editor, the IDE provides an efficient C code compiler and a debugger that support single- stepping with enhanced breakpoints and tracing capabilities All these features are available...

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AN1206 sensorless field oriented control (FOC) of an AC induction motor (ACIM) using field weakening

Ngày tải lên : 11/01/2016, 17:01

... certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona; Gresham, Oregon and design centers in California and India The Company’s quality ... • Having at any time the possibility to react on load change or on acceleration demand by increasing the output voltage – this being translated in maximum voltage reserve and; • Having the maximum ... WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE THE COMPANY SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES,...

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Tài liệu tiếng anh Điện tử công suất mạch MERS Improved performance of induction motor using magnetic energy recovery switch

Ngày tải lên : 15/10/2013, 16:10

... area and No.2 was in lag power factor area From (3) and (4), input power factor where the terminal voltage is equal to the input voltage in lead power factor area is same as the load power factor ... paper made clear that voltage feedback control can solve the problem Starting and steady state characteristics were evaluated experimentally 0 REFERENCES cu [1] K Shimada, T Takaku, T Matsukawa ... capacitor of 100 ,uF is selected for each phase in order to achieve 'balance mode' The MERS is designed to work as a soft-starter and a reactive power generator Experimental device was installed...

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Design and Implementation of a Three-Phase Induction Motor Control Scheme

Ngày tải lên : 27/10/2013, 23:15

... Therefore, data acquisition, debugging and fault logging are realized • × fast A/ D (Analogue to Digital) converters with 10-bit resolution make the computation of accurate, real-time phase current measurements ... Induction Machine 4.1 The fundamental operating principles for an induction motor An induction motor is an asynchronous AC (alternating current) motor The least expensive and most widely used induction ... shape and control the three -phase output voltages in magnitude and frequency by utilization of a constant DC voltage PWM is a process where three -phase sinusoidal signals are compared with a...

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SIMULATION AND SPEED CONTROL OF INDUCTION MOTOR DRIVES

Ngày tải lên : 18/12/2013, 22:06

... Speed at Frequency f Yd Space Vector in d-axis Yq Space Vector in q-axis Ya Space Vector of a -phase Yb Space Vector of b -phase Yc Space Vector of c -phase Vqs q-axis Stator Voltage with stationary ... V|Page LIST OF TABLES Table 1: Machine details used in MATLAB codes execution for variable rotor resistance, variable stator voltage and constant V/f control Table 2: Motor rating and parameters ... stationary frame Vds d-axis Stator Voltage with stationary frame Iqs q-axis Stator Current with stationary frame Ids d-axis Stator Current with stationary frame Iqr q-axis Rotor Current with stationary...

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Tài liệu A neural-network-based space-vector PWM controller for a three-level voltage-fed inverter induction motor drive doc

Ngày tải lên : 22/12/2013, 08:16

... the same figure with , or state There indicating that each phase can have , are 24 active states and the remaining are zero states , and that lie at the origin Evidently, neutral in all the states ... Figs and with the common bias time and variable The digital word corresponding to as a function of angle for both and states in all the phases and in all the modes can be generated by simulation ... of and states of phase voltage in mode These wave patterns are, respectively, defined as pulsed and notched waves It can be shown that similar wave patterns are also valid for the sectors and...

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Tài liệu Manual for induction motors and generators ppt

Ngày tải lên : 26/01/2014, 09:20

... handling of any other goods and on a flat, vibration-free surface After the package has been removed, check that the machine is not damaged and that all accessories are included Tick off the accessories ... type: All machines for hazardous areas Standards relating to the connection and use of electrical apparatus in hazardous areas must be taken into consideration, especially national standards for ... hydraulic jacks for axial and horizontal adjustments • Reserve dial indicator gauges, or preferably a laser optical analyzer, to achieve accurate and precise alignment of the machine • Reserve a...

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Chapter 13 induction motor drives

Ngày tải lên : 16/02/2014, 18:54

... voltages and currents, and a set of comparators that compare the estimated stator flux magnitude and electromagnetic torque with their commanded values (denoted with an asterisk), and a table ... This is largely the result of the fact that the estimated parameters were taken to be the parameter of the machine, and that the machine was assumed to behave in accordance with the machine model ... primary disadvantages of this approach is that it requires phase current feedback (and its associated expense); however, at the same time, this offers the advantage that the current is readily...

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The Fashion Designer Survival Guide: Start and Run Your Own Fashion Business

Ngày tải lên : 03/04/2014, 18:02

... high-end bags and shoes that don’t fluctuate with their weight New markets are available to designers as mass marketing and low-end design gigs at large chains, such as Gap and Target, have gained acceptability ... there and bang out sweater sets Take advantage of opportunities to visit factories, attend fabric shows, and work with sample and patternmakers this is an important time to acquire technique and ... Anne Klein; Marc Jacobs for Perry Ellis; Narciso Rodriguez at Donna Karan and Calvin Klein; Karl Lagerfeld at Balmain, House of Patou, Chloe, and Fendi; and Richard Lambertson of Lambertson Truex...

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Direct control methods for matrix converter and induction motor

Ngày tải lên : 13/05/2014, 00:55

... a b b va vb vb 2/3 vab 2/3 vab iA - iA (1 -a) 2/3 iA iA 11 π (a- a²) 2/3 iA iA 3π (a -1) 2/3 iA iA π (a- 1) 2/3 iC iC π 10 iC π 11 b c a c a a c a b vb vc va vc va va vc 2/3 vbc va vb 2/3 vca -a ... iA iA 5π (a -a) 2/3 iA iA b c a b a b vb vc va vb va vb -2/3 vab -2/3 vbc 2/3 vab 2/3 vbc π π - iA iA - iA iA 15 16 17 π iA π 18 a c c va vc vc -2/3 vca 2/3 vca π iA - iA (1 -a ) 2/3 iA b b a ... a b a va vb va -a 2/3 vab 2/3 vab 5π - iB iB (a- 1) 2/3 iB iB 5π 22 b c b vb vc vb -a 2/3 vbc 2/3 vbc 5π - iB iB (a -a) 2/3 iB iB 9π 23 iB π 24 c a c vc va vc -a 2/3 vca 2/3 vca a a a va va va...

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POWER ELECTRONIC CONTROL OF INDUCTION MOTORS ppt

Ngày tải lên : 11/07/2014, 05:20

... star connected induction motor has the following parameters: stator resistance and rotor resistance are 0.4 and 0.2 , respectively, stator and rotor leakage reactance are 1.5 each, and magnetising ... examples Example: A three -phase star connected 60 Hz four-pole induction motor has the following parameters: stator and rotor resistance 0.024 each, stator and rotor leakage reactance 0.12 each ... rotor leakage reactance are 1.5 each, and magnetising reactance is 30 Motor is controlled by simultaneous stator voltage and frequency variation, using E/f=constant law Calculate stator current...

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INDUCTION MOTORS ppt

Ngày tải lên : 11/07/2014, 05:20

... (VVVF) Single phase induction motors (a) Conditions to generate a rotating magnetic field are that there exists a space displace between two phase windings, and that there exists a phase shift ... currents (b) Self-starting single phase motors are the split phase motors, the capacitor motors, and the shaded pole motors Induction Motors Exercises A four pole three phase induction motor is energized ... conductors /phase Given that the rotor winding resistance is equal to 0.013 Ω /phase, the rotor leakage reactance equal to 0.048 Ω /phase when the rotor speed ωr=0, the supply voltage equal to 400...

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fault diagnosis of induction motors using signal processing based methods and optimal feature selection

Ngày tải lên : 13/11/2014, 06:43

... second part describes some basis knowledge of machine failures such as bearing damage, stator unbalance and rotor unbalance As the availability of accurate sensors and fast computers, many techniques ... fundamental cage frequency, ball pass outer raceway frequency, ball pass inner raceway frequency, and ball rotating frequency Outer race Inner race Balls Cage Fig Bearing structural defects Ball pass ... and rms of signal can provide an indication of the severity of a defect The feature set has a total of 18 features and each six-feature set has been extracted from a signal direction Each feature...

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ADAPTIVE FAULT DETECTION AND CONDITION MONITORING OF INDUCTION MOTOR

Ngày tải lên : 26/09/2015, 10:59

... Hence, the candidate proposes two techniques namely Adaptive Centered Wavelet Technique (ACWT) and Adaptive Wavelet Packet Technique (AWPT) to achieve an adaptive feature extraction for stator currents ... fault characteristic frequency in stator current Bearing fault characteristic frequency in vibration Outer race bearing fault characteristic frequency in vibration Inner race bearing fault characteristic ... transitory characteristic such as drifts, abrupt changes, and frequency trends [15] Its weakness and the practical disadvantage of frequency method in analyzing non-stationary or transient signals are...

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Application of computational intelligence for faulty detection and diagnosis of induction motors and electromechanical systems

Ngày tải lên : 30/09/2015, 13:41

... software platform for fault detection and diagnosis of induction motors and electromechanical systems, analyzing vibration data features and studying and comparing related algorithm, and targeting ... diagnosis induction motors and electromechanical systems instead of manual diagnosis, and achieves a diagnostic accuracy of almost 100% 14 1.3 Thesis Outline This thesis aims to develop an automatic ... Time-domain vibration signals Healthy signals Inner Race Fault Ball Fault Outer Race Fault FFT Frequency-domain vibration signals Envelope Analysis ICA Signals Features SVM Motor Fault Detection and...

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Induction motor vibrations

Ngày tải lên : 26/11/2015, 09:41

... cast, fabricated aluminum bars (AlBar), and fabricated MAIN TERMINAL copper or copper alloy bars (CuBar) Although each type of rotor conBOX struction has advantages and disadvantages, this article ... repaired and placed back into service much faster housing readings are taken in the horizontal, vertical, and axial A fabricated aluminum rotor bar has a cost advantage direction or as close as ... common: ADC, fabricated copper bars (CuBar), and fabricated AlBar, with respect to vibration Vibration, Frequency, and Phase Typically, the ADC rotors are easier to manufacture and Vibration is...

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Revisions to IEEE standard 1068 improvements in repairing and rewinding of ac electric motors

Ngày tải lên : 26/11/2015, 09:41

... dovetail with expected values and approach or equal original manufacturer performance data Also, establishing this repaired/ refurbished baseline data is crucial to the comparison of historical data ... items measured after the machine’s installation is important in the last step of total quality management Reinstallation of a repaired machine into an unsatisfactory mechanical or electrical environment ... mechanical components, and the presence, arrangement, and condition of accessories, such as filters, surge capacitors, lightning arrestors, and space heaters User Guidance 29 evaluate vibration,...

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dynamic model of the induction motor

Ngày tải lên : 28/12/2015, 17:00

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