three phase induction motor with constant frequency supply
Power electronics and motor control SECOND EDITION W. SHEPHERD L. N.HULLEY D. T. W. LIANG
Ngày tải lên :
29/04/2016, 09:46
... 328 328 329 329 330 330 331 337 Xll Contents Three- phase induction motor with constant frequency supply 9.1 Three- phase induction motor with sinusoidal supply voltages Equivalent circuits Power ... factor 6.2.3 Worked examples 6.3 Separately excited d.c motor with rectified three- phase supply 6.3.1 Three- phase semi-converter 6.3.2 Three- phase full converter 6.3.2.1 Continuous conduction 6.3.2.2 ... Problems 10 Induction motor slip-energy recovery 10.1 Three- phase induction motor with injected secondary voltage 10.1.1 Theory of operation 10.1.2 Worked example 10.2 Induction motor slip-energy...
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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
... Characteristics The MERS was installed with two induction motor as shown in Fig 15 One induction motor which is named No was driven by the MERS and another motor which is named No.2 was connected ... Self-excited frequency Fig 40 60 time (ms) Xr fXs Rr fXr frequencyr 20 Rr (a) System iS~~~~~~~~~~~~~~ ° Xs 80 00 fXl ARr Fig Equivalent circuits of series compensated induction motor for system frequency ... the voltage control with the reactive power generation (a) IV SELF-EXCITATION OF SERIES COMPENSATED INDUCTION MOTOR It is well known that series compensation of induction motor may cause some...
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Tài liệu tiếng anh Điện tử công suất mạch MERS A new automatic voltage regulator of self excited induction generator using SVC magnetic energy recovery switch
Ngày tải lên :
15/10/2013, 16:10
... wound type induction motor, squirrel cage type induction generator, SVC MERS and three phase resistive loads Induction motor, as a prime mover, is supplied by inverter to maintain constant speed ... base frequency is 1500 rpm Capacitor voltage (V) −10 A Constant Speed Condition In the case of constant speed, the induction generator speed is kept at 1500 rpm The load is connected to induction ... constant speed and also to make variable speed conditions Induction motor is coupled to induction generator The SVC MERS inputs are connected to the induction generator terminals and the outputs are...
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Life cycle assessment (LCA) of an energy recovery plant in the olive oil industries
Ngày tải lên :
05/09/2013, 16:10
... of three sections: combustion, energy recovery and gas treatment For each section several technologies and design layout are possible The plant under analysis has three parallel lines, each with ... recovery of olive pit and solid wastes offers environmental advantages with respect to other alternative fuels, in particular with wood pellets The interest in understanding comprehensively the ... or briquettes [9] Biomass can also be burned with coal in a boiler of a conventional power plant to yield steam and electricity Co-firing biomass with coal is currently the most cost-efficient...
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Tài liệu tiếng anh Điện tử công suất mạch MERS Feasible series compensation application using magnetic energy recovery switch
Ngày tải lên :
15/10/2013, 16:10
... current With this constraint, the maximum power capability is increased with around 40 percent for the case with MERS and constant voltage control, and with around 48 percent for the case with maximum ... figure summarizes the results for the case with and without MERS The case with MERS shows output power improvements of around 34 percent compared to the case without MERS The estimated values shown ... combination with synchronous generator (generator parameters used are the same as for experimental set-up) The left part shows the resulting phasor diagrams for the case without MERS and with two...
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Tài liệu tiếng anh Điện tử công suất mạch MERS Improved wind power conversion system using magnetic energy recovery switch MERS
Ngày tải lên :
15/10/2013, 16:11
... the phase diagram of synchronous generator ˙ with MERS The phase of induced electromotive force E is ˙ The output voltage V0 is ˙ equal to the phase of output current I increased compared with ... coupled with a 3.7-kW squirrel cage induction motor The rotation speed of the induction machine is controlled by an inverter to simulate fluctuations of a wind IAS 2005 Fig Overview of 3 -phase MERS ... generator and 3.7-kW induction motor (M-G set) The mechanical input power of the generator is measured with a torque meter IV E XPERIMENTAL SETUP Before comparing the MERS system with the conventional...
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Tài liệu tiếng anh Điện tử công suất mạch MERS Loss and rating consideration of a wind energy conversion system with reactive compensation by magnetic energy recovery switch
Ngày tải lên :
15/10/2013, 16:11
... rated voltage within the current rating of the device This also means that the series voltage injection capability stays constant even with varying frequency A major advantage with the MERS configuration ... must be able to supply line voltage, thus 1.73 pu By multiplying the device supply voltage and the number of switches, the relative supply rating results The value indicates that with equal voltage ... 10 % variable speed operation with rated current This was selected, such that in a high output power scenario, operation without a dc-dc converter is possibile with still having some variable...
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Tài liệu tiếng anh Điện tử công suất mạch MERS Power supply for pulsed magnets with magnetic energy recovery current switch
Ngày tải lên :
15/10/2013, 16:11
... magnetic recovery switch to the pulsed power supply was proposed This switch can flow pulsed current in high repetition, without being concerned with inductance of load By absorbing and recovering ... turn-off waveforms of one MOSFET element in this switch Switching frequency is kHz The rise time of current is delayed compared with hard switching which does not use a switch, because the series ... TURN-OFF SWITCHING LOSSES III HIGH REPETITION PULSED POWER SUPPLY A Pulsed Current in High Repetition This switch can be applied to a power supply which supplies high-speed and high-repetition pulsed...
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Tài liệu tiếng anh Điện tử công suất mạch MERS Series connected power flow control using magnetic energy recovery switch
Ngày tải lên :
15/10/2013, 16:12
... benefit of dividing the expression in (1) with the square of the current is now a more simple optimization with two variables instead of three The results, with Xc equal one, are shown in Fig The ... minimum capacitor voltage and the phase lag The basic task of the primary control system is to perform this control with given Vc,min and -y set-points in a three phase system (Fig 7) The gate logic ... Illustration of experimental setup Fig 10 and with picture in Fig 11 It consists of a controllable 3 -phase ac power supply, which can control the applied voltage with good response The MERS, a Y- A transformer...
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Tài liệu tiếng anh Điện tử công suất mạch MERS Voltage rating reduction of magnetic power supplies using a magnetic energy recovery switch
Ngày tải lên :
15/10/2013, 16:12
... power supply (5) where is the inductance of the coil and is peak current and is requested time to raise the current On the other hand, from (2), required DC voltage with a power supply with MERS ... each cycle (3) B Power Supply for Alternating Magnetic Field Coil Fig shows the circuit configuration of a proposing power supply for alternating magnetic field coil The power supply consists of a ... use DC capacitors to store the energy High frequency applications are also suitable because required current rising time is fast compared with the time constant Experiments by the laboratory pilot...
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Design and Implementation of a Three-Phase Induction Motor Control Scheme
Ngày tải lên :
27/10/2013, 23:15
... the most 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 ... control scheme for a three- phase induction motor drive This induction motor drive is proposed to be incorporated into a “hybrid car” or an “electric car” 1.2 Available resources • Motor controller ... “Insight”) work 2.2 Induction Motor Theory and Practice Wildi [1] is an excellent source of information on the theory behind the operation of an induction motor The three- phase induction machine...
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SINUSOIDAL PWM OPERATION OF AN AC INDUCTION MOTOR CONTROLLER
Ngày tải lên :
17/12/2013, 18:06
... appliances run on single -phase ac induction motors less than ½ horsepower And most of those motors lack a proper motor controller in order to run the motor more efficiently Motors can run more efficiently ... maintaining constant voltage while varying the frequency AC MOTOR CONTROLLER PAGE 10 APRIL 26, 2000 Fig.7 Torque-speed characteristics for constant voltage and variable frequency The motor will ... at higher frequencies causing the motor to stall with an applied load EFFECTS OF CONSTANT FREQUENCY The next figure (Fig.8) illustrates the effects of constant frequency on the torquespeed curve...
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SIMULATION AND SPEED CONTROL OF INDUCTION MOTOR DRIVES
Ngày tải lên :
18/12/2013, 22:06
... ii Squirrel Cage Induction Motor Wound Rotor or Slip Ring Induction Motor The stator of both types of motors consists of a three phase balanced distributed winding with each phase mechanically ... Control of Induction Motor Drives 2012 CHAPTER LITERATURE REVIEW 2.1 Three phase induction motor and their Torque-Speed analysis Based on the construction of the rotor, a 3- induction motor can ... 2.1: Per phase equivalent circuit of a 3- induction motor Figure 2.2: Per phase approximate equivalent circuit of a 3- induction motor Figure 3.1: SIMULINK model of a 3- Induction motor Figure...
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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
... schematic diagram of a three- level IGBT inverter with induction motor load For ac–dc–ac power conversion, a similar unit is connected at the input in an inverse manner The phase , for example, ... CONTROLLER 661 TABLE I SWITCHING STATES OF THE INVERTER (X = Fig Schematic diagram of three- level inverter with induction motor load U; V ; W ) operation The inner hexagon covering region of each sector ... for U -phase P states and performed with the and signals only Similar operations are signals of all the phases and all the The drive performance was evaluated in detail by simulation with the...
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Tài liệu AC Induction Motor Fundamentals docx
Ngày tải lên :
25/01/2014, 13:20
... AC INDUCTION MOTORS Generally, induction motors are categorized based on the number of stator windings They are: • Single -phase induction motor • Three- phase induction motor Single -Phase Induction ... and operates with a single -phase power supply In all single -phase induction motors, the rotor is the squirrel cage type The single -phase induction motor is not self-starting When the motor is connected ... the threephase induction motor with single -phase supply is shown in Figure 20 TYPICAL VFD Filter Inverter Rectifier Main Supply 115/230 VAC 60/50 Hz PFC Attenuator and Isolator + – 3 -Phase Induction...
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Chapter 13 induction motor drives
Ngày tải lên :
16/02/2014, 18:54
... literature [1, 2] 510 Induction Motor Drives Figure 13.2-5. Start-up performance of compensated volts-per-hertz drive 13.3. CONSTANT SLIP CURRENT CONTROL Although the three- phase bridge inverter ... slip frequency is held constant at a set value ωs,set However, before deriving the value of slip frequency to be used, it is important to establish when it is reasonable to use a constant slip frequency ... 512 Induction Motor Drives where λr and Is are the rms value of the fundamental component of the referred a -phase rotor flux linkage and a -phase stator current, respectively Combining (13.3-7) with...
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Direct control methods for matrix converter and induction motor
Ngày tải lên :
13/05/2014, 00:55
... is assumed to be a balanced sinusoidal three phase voltage source with frequency ωι The output voltages are assumed to be a similar balanced system with frequency ωo The reference values for sliding ... University Karlsruhe, Germany 2002 L Huber, D Borojevič, “Space Vector Modulated Three- Phase to Three- Phase Matrix Converter with Input Power Factor Correction”, IEEE Trans on Ind Applic., vol 31, no ... stator flux and torque within certain limits by compairing their actual values with the reference values via two hysteresis controllers [10] Fig 2c) shows a stator flux vector Ψ S within the output...
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Scientific report: "The potential energy recovery from landfills and evaluate the environmental benefits of the generation system using gas from landfills in Nam Son landfill, Vietnam" docx
Ngày tải lên :
06/08/2014, 18:22
... 3.047 4.099 Construction phase 5.59 0.0016 0.234 0.297 Operational phase 2307.7 0.513 96.7 95.3 Decommissioning phase -0.046 0.0016 -0.0019 0.3055 Total 2385.8 0.538 Phases Table Summary of energy ... consumption and CO2 emission in lifecycle of G.T power plant Phases Upstream material Construction phase Operation phase Decommissioning phase Total Energy consumption (kcal/kWh) 72.63 4.93 3259.58 ... in NS landfill is suitable with range of Lo in IPCC guidelines and also suitable with two set of default value used in US-EPA standards 3.1.3 Methane generation rate constant k As mentioned above,...
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Scientific report: "The potential energy recovery from landfills and evaluate the environmental benefits of the generation system using gas from landfills in Nam Son landfill, Vietnam" pps
Ngày tải lên :
06/08/2014, 18:22
... 3.047 4.099 Construction phase 5.59 0.0016 0.234 0.297 Operational phase 2307.7 0.513 96.7 95.3 Decommissioning phase -0.046 0.0016 -0.0019 0.3055 Total 2385.8 0.538 Phases Table Summary of energy ... consumption and CO2 emission in lifecycle of G.T power plant Phases Upstream material Construction phase Operation phase Decommissioning phase Total Energy consumption (kcal/kWh) 72.63 4.93 3259.58 ... in NS landfill is suitable with range of Lo in IPCC guidelines and also suitable with two set of default value used in US-EPA standards 3.1.3 Methane generation rate constant k As mentioned above,...
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