equivalent circuits for single phase induction motors

... open-circuited stator phase, which is equivalent to single- phase operation, let us consider the stator circuits of a three -phase, wye-connected induction machine as shown in Figure 9.5-3, where phase a is ... phase for the three -phase induction machine can, with minor modifications, be used to analyze the operating modes of single- phase machines We will follow closely to the development for three -phase ... of Single- Phase Induction Motors The steady-state torque versus speed characteristics are shown in Figure 9.8-2 for a symmetrical two -phase induction motor with rated voltage applied to one phase...

Ngày tải lên: 16/02/2014, 18:48

... Operation    A phase motor self starts due to a rotating magnetic field in the windings If a single phase was applied to one winding, it would simply pulse ... inductive reactance causing the current to lag Split Phase Motor  A split phase motor has windings:   Run winding Start winding Split Phase Motor    The two windings cause the current to ... and produce no torque If we could simply ‘push’ the rotor, it would begin to spin for the same reasons in a phase motor Operation    To make the spin happen, we add a start winding to the...

Ngày tải lên: 27/06/2014, 19:20

... potentiometer) TABLE_OFFSET1 Pointer to sine table for phase TABLE_OFFSET2 Pointer to sine table for phase TABLE_OFFSET3 Pointer to sine table for phase DS00889B-page 12  2004 Microchip Technology ... LED_PORT,FWD_REV_LED ;Is MOTOR_DIRECTION flag set for forward rotation? ;No - Go for reverse rotation ;Copy TEMP_LOC and TEMP_LOC_1 values to ;CCPR1L and CCPR2L respectively for ;forward rotation of motor ;Copy ... still available to users for development of their own applications VF control provides a simple and cost efficient method for open-loop speed control of 3 -phase induction motors A low-cost VF solution...

Ngày tải lên: 11/01/2016, 14:35

... Manual for Induction Motors and Generators Bearing type for D-end Bearing type for ND-end Oil change interval Viscosity class Oil quantity for D-end bearing (for self lubricated) Oil quantity for ... Manual for Induction Motors and Generators 3BFP 000 050 R0101 REV C Safety Instruction - Manual for Induction Motors and Generators Chapter - Introduction 1.1 1.2 1.3 1.4 1.5 General information ... - 21 Manual for Induction Motors and Generators NOTE: Suitability of the shaft end and the bearings for the belt drive must be always checked before use Do not exceed the radial force specified...

Ngày tải lên: 26/01/2014, 09:20

... Large number of turns • Aux has relative Small number of turns Φm Starting Torque in Single phase motor Split Phase Principle • To produce a starting torque a rotating magnetic field must be produced ... main windg produce a flux Φ m while the Aux wndg produces a flux Φa Since the angles are out of phase a resultant rotating field is created • A centrifugal switch disconnects the Aux wndg from...

Ngày tải lên: 27/06/2014, 19:20

... calculating pressure which are based on various formulas to calculate friction coefficient: • Weymouth equation Weymouth proposed the following relationship for friction coefficient f, as a function ... is performed with the following steps: Starting with the known pressure, p1 , at L1 Estimating a pressure increment Δp, corresponding to length ΔL Calculating the average pressure and, for nonisothermal ... results in calculation This brings about a need to determine a new correlation for friction coefficient to make it suitable for the associated gas pipeline in practice The authors are very gracious...

Ngày tải lên: 22/07/2014, 10:21

... The performance of induction motors is closely related to guarantee its health operational condition Although the robustness and reliability of induction motors is relatively high, some unforeseen ... system for more types of induction motors and electromechanical systems faults detection 18 CHAPTER INDUCTION MOTOR AND DATA COLLECTION 2.1 Introduction 2.1.1 Structure of Induction Motor Induction ... of research in motors fault detection area However vibration (acoustic) and current (electromagnetic flux) information are generally used for condition monitoring of induction motors Even though...

Ngày tải lên: 30/09/2015, 13:41

... compatible voltage supply for the motor controller that will be used for this thesis • Induction motor Three -phase, 0.5kW, 4-pole machine This induction motor is only used for the prototype design ... example problems The equivalent electrical circuit for an induction motor is derived based on the three -phase transformer This book also presents the fundamentals of the induction motor from ... phenomena that are responsible for the induction motor’s many advantages are clearly explained Wildi also presents the two types of induction motors: “the squirrel cage induction motor” and the “wound...

Ngày tải lên: 27/10/2013, 23:15

... Mains filter for one axis with single- phase power supply Mains filter for several axes: For single- phase mains connection for axes For single- phase mains connection for axes For three -phase mains ... Fuse: ! For single- phase mains connection For three -phase mains connection with neutral For three -phase mains connection without neutral 115 V = K 16 A for axes max 230 V = K 16 A for axes max for ... length 35 m) For FM-NC (FM-STEPDRIVE end non-terminated, max length 35 m) Ordering information for 115 V = B84142-B8-R SIEMENS for 230 V = B84113-C-B60 component service catalogue for 115 V =...

Ngày tải lên: 21/11/2013, 13:45

Ngày tải lên: 12/12/2013, 20:34

... no 1, pp 28–38, Spring 2007 [7] P K Jain, J R Espinoza, and H Jin, “Performance of a single- stage UPS system for single- phase trapezoidal-shaped AC-voltage supplies,” IEEE Trans Power Electron., ... declines by 20% of its normal voltage The waveform distortion can be observed for the traditional UPS, whereas the sinusoidal waveform can be kept for the proposed UPS Fig 9(c) further shows the ... Mar 19–23, 2006, pp 348–354 [9] C.-H Lai and Y.-Y Tzou, “DSP-embedded UPS controller for highperformance single- phase on-line UPS systems,” in Proc 28th IEEE Annu Conf Ind Electron Soc., Nov 5–8,...

Ngày tải lên: 03/01/2014, 19:12

... phase shifted for angle and Simulation results for phase angles are shown in Fig 9(a) and (b), respectively Characteristic ´ ´ DESPOTOVIC AND STOJILJKOVIC: POWER CONVERTER CONTROL CIRCUITS FOR ... waveforms in case of phase control (a) Phase angle  = 126 (b) Phase angle  = 54 In the state of static equilibrium , the above equation becomes (23) From the electrical equation (17) for ... Previously mentioned facts were motivation for mathematical model formulation and for further research of both the phase angle control and switch mode control behavior for the electromagnetic vibratory...

Ngày tải lên: 03/01/2014, 19:16

... TECHNIQUES FOR THREE -PHASE VS-PWM CONVERTERS While phase voltages can be controlled independently, phase currents are determined not only by their own phase voltage, but also by those of other phases ... midpoint (when available) phase load are not connected [Fig 2(a)], phase currents depend only on the voltage difference between phases Therefore, a common term can be added to the phase voltages, thus ... capable of forcing the command current Therefore, the converter requires a sufficient supply voltage reserve to force the ac line current in the entire and load range C Basic Requirements and Performance...

Ngày tải lên: 03/01/2014, 19:45

... a license for English and Spanish parsers Update the host/port in the files fdges-client.pl (for Spanish) and fdgen-client.pl (for English) The current values should look like this for fdges-client.pl: ... Automatic Generation of Informative Cross-Lingual Headlines for Text and Speech Thesis Proposal, University of Maryland, 2003 5.3 OTHER PRODUCTS Trimmer: Trimmer generates a headline for a news story ... capabilities useful for intelligence analysts, such as cross-lingual summarization and data mining 6.3 CONTRIBUTIONS TO RESOURCES FOR RESEARCH This work provides an integral part for many NLP applications...

Ngày tải lên: 07/03/2014, 11:20

... Electronic Circuits for the Evil Genius ™ Evil Genius™ Series Bike, Scooter, and Chopper Projects for the Evil Genius Bionics for the Evil Genius: 25 Build-It-Yourself Projects Electronic Circuits for ... Projects for the Evil Genius 51 High-Tech Practical Jokes for the Evil Genius 46 Science Fair Projects for the Evil Genius Fuel Cell Projects for the Evil Genius Holography Projects for the Evil ... Projects for the Evil Genius 101 Spy Gadgets for the Evil Genius 125 Physics Projects for the Evil Genius 123 PIC® Microcontroller Experiments for the Evil Genius 123 Robotics Experiments for the...

Ngày tải lên: 16/03/2014, 09:20

... (Radford, 1988): constituents appear in constituent contexts A particular linguistic phenomenon that the system exploits is that long constituents often have short, common equivalents, or proforms, ... multinomial distributions over the set of all possible yields: one for constituents (Bi j = c) and one for distituents (Bi j = d) Similarly for P(x i j |Bi j ) and contexts The marginal probability assigned ... bracketing is tree -equivalent if the size-one terminal spans and the full-sentence span are constituents, and all size-zero spans are distituents Figure 2(a) and (b) are tree -equivalent Tree-equivalent...

Ngày tải lên: 17/03/2014, 08:20

... single level of a taxonomy For a taxonomy T(C,R), we define its information function as: Info(T ) = d (c x , c y ) (1) 4.2 ∑ x < y ,c x ,c y ∈C Similarly, we define the information function for ... features are the best for different types of relations and for terms at different abstraction levels Most prior work uses a single rule or feature function for automatic taxonomy induction at all ... set is turned on one by one for experiments in Section 5.4 and 5.5 5.3 Performance of Taxonomy Induction In this section, we compare the following automatic taxonomy induction systems: HE, the...

Ngày tải lên: 30/03/2014, 23:20

... waveforms and calculate their average and RMS values of different variables associated with a single phase fully controlled half wave converter • Explain the operating principle of a single phase ... can be done for i0 In particulars for pure resistive loads FFio = FFvo 10.2.2 Resistive-Inductive load Fig 10.2 (a) and (b) shows the circuit diagram and the waveforms of a single phase fully ... controlling the _ of the converter A single phase half wave controlled converter always operates in the conduction mode The voltage form factor of a single phase fully controlled half wave converter...

Ngày tải lên: 14/05/2014, 22:32