voltage reactive power and power factor control capabilities
High efficiency and digitally controlled AC DC converter with power factor correction and fast output voltage regulation
Ngày tải lên :
09/09/2015, 17:53
... high efficiency and power factor at light load in PFC for energy saving If the light load efficiency and light load power factor of PFC are improved, the overall efficiency and power factor of the ... efficiency and power factor improvement for desktop computers power supplies In Fig 1.6 and Fig 1.7, the light load region is also where we can get higher efficiency gains and higher power factor improvements ... efficiency curve and a flatter power factor curve above the 80 PLUS and ENERGY STAR requirements These make it easier for the power supply in meeting the increasing efficiency and power factor requirements...
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AN1208 integrated power factor correction (PFC) and sensorless field oriented control (FOC) system
Ngày tải lên :
11/01/2016, 17:01
... uses three control loops: the voltage control loop, current control loop, and the voltage feed forward control loop The voltage compensator uses the reference voltage and actual output voltage as ... implement PFC and Sensorless FOC technique The PFC technique uses two compensators to control the voltage and current control loops, and the Sensorless FOC technique uses three compensators to control ... Field Oriented Control (FOC) System Ia a, b, c to α −β Ib 3Φ Stator System DS01208A-page AN1208 Power Factor Correction (PFC) PWM Θ Current Control VAVG VAC SVM AN1208 Digital Power Factor Correction...
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Power converter control circuits for two mass vibratory conveying system with electromagnetic drive simulations and experimental results IEEE trans
Ngày tải lên :
03/01/2014, 19:16
... from the voltage controlled oscillator and controller output This reference value is determifor amplitude and duration and nated by reference inputs, for frequency Both of these signals are controlled ... model for the VCS with electromagnetic drive and power converter control circuits for its optimal control ´ ´ DESPOTOVIC AND STOJILJKOVIC: POWER CONVERTER CONTROL CIRCUITS FOR TWO-MASS VCS 465 Fig ... zero-cross and 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...
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Active filter operation providing unity power factor supply system for drives and battery charging
Ngày tải lên :
03/01/2014, 19:45
... diagram for non adive power control ?he dif€erence voltage signal informswhether there was a rise or fall of the actual voltage U 'Ihe voltage regulator RU converts the diference voltage signpmto ... atso as reactive leading and lagging power source However, au maease of readive power c a w muease of voltampere power ofthe adive filter [I] F.Blaabjer& JKPedersen 'An Integrated High Power Fador ... non adive power' , IEE F'roc-Hec Power Appl Vo1.141, No.4, July 1994 Pages 207-21 [4] W.Konara, '"pas& m Demand for Drive Powez' Prw 6th 'm coaference on Power Eledronics and Mdion Control, PEMC90...
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cirstea, m. n. (2002). neural and fuzzy logic control of drives and power systemsl
Ngày tải lên :
18/04/2014, 12:29
... fuzzy logic, electric machines and drives, power systems and VHDL and forms a basic guide for the understanding of the fundamental principles of modern power electronic control systems design To be ... 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 systems (F) The ... multivariable control system and therefore, in principle, the general theories of multivariable control system should be applicable Here, the voltages and the frequency are the control inputs and the...
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Power factor correction and harmonic filtering - Hiệu chỉnh hệ số công suất và lọc sóng hài ppt
Ngày tải lên :
06/07/2014, 20:21
... (kVA) P = Active power S = Apparent power Reactive energy and power factor 1.3 The power factor Definition of power factor The power factor of a load, which may be a single power- consuming item, ... Active power Q = Reactive power S = Apparent power © Schneider Electric - all rights reserved L - Power factor correction and harmonic filtering Reactive energy and power factor L - Power factor ... The value of a power factor will range from to If currents and voltages are perfectly sinusoidal signals, power factor equals cos ϕ A power factor close to unity means that the reactive energy...
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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
... series voltage can be zero even with voltage remaining on the dc-capacitor By using the described switching patterns, it is possible to control the minimum dc-capacitor voltage and to control ... a feedback control structure, where the voltage peak across the capacitor is estimated and the deviation between the estimated and the limitation voltage, VLimit, is fed into a PI controller ... Primary Control The basic operation principle was described in section II-B and consists of controlling the minimum capacitor voltage and the phase lag The basic task of the primary control system...
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Reliability assessment of power systems considering reactive power sources
Ngày tải lên :
03/01/2014, 19:39
... Pi and LC Qi are the real power load curtailment due to real Step3: Calculate total system real and reactive power capacity power and reactive power shortage for state i respectively, Pi and ... real and reactive power load is bundled together using fixed power factor, which means that real and reactive power must be curtailed at the same percentage during the real or reactive power ... reactive power shortage will cause the reactive power curtailments because real and reactive power loads are bundled by the fixed power factor [3] [4] [5] [6] TABLE LOAD POINT AND SYSTEM EVNSQ AND...
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Reactive power compensation by power electronic drive
Ngày tải lên :
03/01/2014, 19:47
... basing on tRe actual active power demand of the drive Therefore generation of reactive power was limited according to input converter power ratings and the drive power demand The electric drive system ... mount of reactive gowr ahat can be generated to the supply line is n m m u m and then 65 active p m and additionally to generate reactive p o w r to o r the supply line The amount of reactive power ... maximum of reactive power only when the electric motor does not operate REFERENCES Figure 11: Phase voltage Y and total phase current i taka f?om the network while limited reactive power compnsat~on...
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Research on field weakening based on reactive power with BLDC motor for electric vehicle application
Ngày tải lên :
03/01/2014, 19:47
... ON REACTIVE POWER WITH BLDC MOTOR The electrical machinery power is composed by the active power and the reactive power[ 9]-[10] In the static α − β frame, the active power Pe and reactive power ... through the CAN from vehicle controller The reactive power torque is calculated by the control command and the speed The electric current function table and the field-weakening control angle function ... internal power factor angle; β is the angle between permanent magnetism rotor flux linkage and the stator flux linkage, calling the power factor angle; θ is the phase angle between rotor d axis and...
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Tài liệu Power Electronic Control in Electrical Systems pptx
Ngày tải lên :
16/02/2014, 20:20
... connections, power measurement and other topics It covers the basic precepts of power and frequency control, voltage control and load balancing, and provides a basic understanding of the reactive ... active power flow control Several other power electronic controllers have been built to provide adaptive control to key parameters of the power system besides voltage magnitude, reactive power and ... active power flow control Nowadays, a single piece of equipment is capable of controlling voltage magnitude and active and reactive power This is the UPFC, the most sophisticated power controller...
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Sense and Respond Logistics - Integrating Prediction, Responsiveness, and Control Capabilities pot
Ngày tải lên :
06/03/2014, 20:20
... Responsiveness, and Command and Control Capabilities S&RCS capabilities involve predicting what will be needed and responding quickly to anticipated or unanticipated needs to maintain military capabilities ... Technology, and Logistics available-to-promise Air War Over Serbia Basic Expeditionary Airfield Resources Budget Estimate Submission command and control command, control, communications, and computers ... prediction and responsiveness have been viewed as competing concepts; we show that both are necessary and can be integrated within a command and control system to create military sense and respond capabilities...
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Power Factor Tutorial doc
Ngày tải lên :
17/03/2014, 20:20
... magnetizing or reactive power is the kilovar (kVAR) The working power (kW) and reactive power (kVAR) together make up apparent power which is measured in kilovolt-amperes (kVA) Most AC power systems ... improve from the present power factor to the desired power factor EXAMPLE: A small machine tool plant uses an average of 100 kW with an existing power factor of 80% Desired power factor is 95% The kVAR ... efficient, reducing cost for the utility and their customers The ratio of actual power and apparent power is usually expressed in percentage and is called power factor PF = kW = cos ϕ kVA In the illustration...
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POWER ELECTRONIC CONTROL OF INDUCTION MOTORS ppt
Ngày tải lên :
11/07/2014, 05:20
... following voltage vectors will than be applied: t = ms zero voltage vector plus vectors and t = ms zero voltage vector plus vectors and t = ms zero voltage vector plus vectors and t = 12 ms zero voltage ... resistance and rotor resistance are 0.4 and 0.2 , respectively, stator and rotor leakage reactance are 1.5 each, and magnetising reactance is 30 Motor is controlled by simultaneous stator voltage and ... analysed Power circuit of the VSI and associated voltage wave-forms, valid for six-step operation, are for convenience shown again in Figs 6.17 and 6.18 Leg voltages (voltages between points A, B and...
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Báo cáo y học: "The NFI-Regulome Database: A tool for annotation and analysis of control regions of genes regulated by Nuclear Factor I transcription factors" pdf
Ngày tải lên :
10/08/2014, 09:22
... manuscript DHL wrote the PHP and perl scripts to annotate and populate the database and worked on database and table design and interaction SMG contributed to manuscript preparation and future database ... annotators and the work of other authors and wrote much of the manuscript JG contributed to database design and function, performed maintenance and updating of database functions and contributed ... NFI binding sites, and the location and identity of other known or unknown site-specific transcription factors Since there are hundreds of known sitespecific transcription factors [13,16,17],...
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CÁC LỢI ÍCH KHI VẬN HÀNH MÁY PHÁT Ở HỆ SỐ CÔNG SUẤT CAO (Benefits of operating your generator at a higher power factor )
Ngày tải lên :
12/08/2014, 12:51
... Power Factor of Ø http://www.nepsi.com/generator.htm Reduced Electric Utility Bill due to lower amount of purchased power from power provider In today's de-regulated market place, MWATTS of power ... 2, when operated at a lagging power factor of 0.8, will have a kW output of 0.8 per unit and a kVAr output of 0.6 per unit Operating the same machine at unity power factor will result in a machine ... capacitor bank can reduce utility bills by alleviating power factor penalties associated with the purchase of power from the power provider Northeast Power Systems, Inc 66 Carey Road Queensbury, New...
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HỆ THỐNG ĐIỀU KHIỂN GHẾ ĐIỆN TỬ FRONT POWER SEAT CONTROL SYSTEM (w Memory)
Ngày tải lên :
27/06/2015, 12:38
... Front Passenger Side Slide Power and memory Power Reclining Power and memory Power Front Vertical Power and memory Power Lifter Power and memory Power Lumbar Support Power - In the memory function, ... switch and ECU) SE-39 Power seat motor circuit SE-16 Position control ECU and switch assembly (power seat control switch and ECU) SE-39 Position control ECU and switch assembly (power seat control ... SEAT – FRONT POWER SEAT CONTROL SYSTEM (w/ Memory) WIRING DIAGRAM Position Control ECU and Switch Assembly (Power Seat Control Switch and ECU) Power Seat Motor (Slide Control) SLD+ SLDPower Seat...
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