triac triode for alternating current

Adjustable speed drive with active filtering capability for harmonic current compensation

Ngày tải lên : 03/01/2014, 19:45

... almost equal For the experiment, two controllers will be considered: the deadbeat controller for its excellent performance, and the PI controller for its compromise of simplicity - performance B ... used: V COMPENSATION OF CURRENT CONTROLLER ERROR Fig shows that the PI current controller introduces a gain- and phase error in closed loop for the harmonic current references For the deadbeat controller ... the currentcontrollers The simulated responses to a step on the current reference ief with the circuit on Fig using the four designed currentcontrollers are shown in Fig The analysis of the current...

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Esp at hanoi water resources university – recommendations and suggestions for the current course

Ngày tải lên : 29/01/2014, 14:43

... University for many years As a technical university, one of the requirements for graduates is to be able to read professional documents in their fields for further study, or future jobs Therefore, ... on Hanoi Water Resources students’ evaluation of the current ESP course The information is intended to be used as the base for improving the current ESP course at HWRU, making the course more effective ... and taught French for specific purposes, Russian for specific purposes, Chinese for specific purposes – all of these exist and are constructed on the same basis as English for specific purposes...

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IEC 62271 100 high voltage switchgear and controlgear high voltage alternating current circuit

Ngày tải lên : 04/04/2014, 12:34

... 3.6.125 operating current (of an over -current release) [IEV 441-16-45] 3.6.126 current setting (of an over -current release) [IEV 441-16-46] 3.6.127 current setting range (of an over -current release) ... of static horizontal and vertical forces for static terminal load test .157 Table 10 – Current peak values and current loop durations during the arcing period for 50 Hz operation in relation with ... specifications High-voltage alternating current circuit-breakers Synthetic testing High-voltage alternating current disconnectors and earthing switches High-voltage switches for rated voltages above...

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kennelly authur electro-dynamic machinery for continuous currents

Ngày tải lên : 04/06/2014, 12:30

... brushes Fig 12 shows an alternating- current, self-exciting, octopoiar generator for arc circuits Although this machine is an alternator j i e.y supplies alternating currents, it, nevertheless ... electric current Under these conditions, electromotive forces are generated in the conductors Since the object of the electromotive force generated in the armature is the production of a current, ... constant current under all variations of (2.) tain load STRUCTURAL ELEMENTS II Constant -current machines are employed almost exclusively for supplying arc lamps in scries represents a form of...

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steinmetz cp discussion on 'the effect of iron in distorting alternating-current wave-form

Ngày tải lên : 04/06/2014, 12:44

... harmonic currents and harmonic electromotive forces Another point concerns the assumption which is made in all alternating- current treatises as to the harmonic character of electromotive forces and currents ... theory of alternating currents, for this reason: given an alternator which develops an electromotive force of any complicated wave-shape whatever, and let it be required to determine the current ... circuit, as well as that of the transformer for stepping down the generator pressure to a sufficiently low value to apply to ÆTHE ORCE RF ALTERNATING- CURRENT WAVE-FORM 710 [Sept 28 the sample under...

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Alternating Currents pot

Ngày tải lên : 06/07/2014, 22:20

... P R Rp Rs t d e0 e Batteries | Alternating Currents plate separation distance diffusion constant voltage Faraday constant current effective RMS current maximum current length of resistive path ... applying current pulses to ﬂooded lead– acid batteries has revealed some interesting effects and has found some practical applications The application of current pulses to the cell formation for lead–acid ... self-discharge current Upon correcting for the self-discharge current component, the segment becomes linear The downward ﬂow of sulfuric acid does not permit the creation of a well-formed boundary...

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TRẮC NGHIỆM ĐIỆN XOAY CHIỀU(AC:ALTERNATING CURRENT)(CB) potx

Ngày tải lên : 23/07/2014, 10:20

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Alternating current drives in the steel industry

Ngày tải lên : 26/11/2015, 09:40

... Basic cycloconverter configurations (both for noncirculating and circulating current type) and the output voltage and current waveforms for a noncirculating current cycloconverter as obtained by ... with unity current gain, which means that a 6,000-A (anode current) device is turned off by a À6,000-A gate current [9] However, the current pulse should be very narrow with low energy for fast ... though more efficient (99% compared with 98.5% for circulating current one [15]), which has a dead time of 1–3 ns for switching between forward and reverse current resulting in a higher torque ripple...

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Establishment of Effluent Standards for Industrial Wastewaters in Korea: Current Issues and Suggestions for Future Plan

Ngày tải lên : 05/09/2013, 10:15

... applied on the basis of treatability Therefore, every industry under the regulation should be responsible for the regular monitoring of the effluent and forwarding the data to the environmental ... document for water quality-based toxics control, EPA 505-2-90-001 US EPA (1996) NPDES permit writer’s manual, EPA/833/B-96/003 US EPA (2000) Methodology for deriving ambient water quality criteria for ... separate effluent standard) Categorical effluent standard Effluent standards have been transformed from uniform standard to categorical one according to the wastewater characteristics (Tilche and...

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Tài liệu tiếng anh Điện tử công suất mạch MERS A new AC current switch called MERS with low on state voltage IGBTs for renewable energy and power saving applications

Ngày tải lên : 15/10/2013, 16:10

... The current changes polarity with zero voltage naturally, and the current is shut down immediately with zero voltage Therefore, every switching is performed under zero voltage and/or zero current ... (a) Fig 16 Schematic waveforms of load voltage and load current Applied voltage and ﬂowing current of V-arm device are also shown (b) Fig 17 90 kVA prototype power supply for controllable frequency ... placement of electrodes For the FWD, lifetime control was reduced and this resulted in decreasing forward drop voltage Fig shows appearance of the newly designed IGBT, which has 150 A current rating and...

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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

... (2), presumably because the current decreases by on-resistance of MOSFET and switching loss B Current Waveform Control It is required to control the current in time for operation of a synchrotron ... JUNE 2004 Fig Simulation waveforms of current pulses generation Power source voltage V = 100 V , C = mF, L = mH, R = 0:2 , f = 20 Hz Fig Experimental waveforms of current pulses generation C = ... TAKAKU et al.: POWER SUPPLY FOR PULSED MAGNETS WITH MAGNETIC ENERGY RECOVERY CURRENT SWITCH Fig Turn-on waveforms of experimental results Fig 1795 Turn-off waveforms of experimental results...

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Comparison of current control techniques for active filter application

Ngày tải lên : 03/01/2014, 19:45

... ms/div) (b) Line current iS spectrum TABLE II RMS CURRENT ERROR AND LINE CURRENT THD TABLE III RMS CURRENT ERROR AND LINE CURRENT THD especially in correspondence of high reference FOR FOR = 0 ... operates as a controlled current source The generated phase current, therefore, tracks a reference obtained by subtracting the load current to the desired, compensated line current This latter, in ... The current control of the ﬁlter operates the switches so as to The current reference is generate a suitable current from the line derived by subtracting the load current which represents the current...

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459
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Current control techniques for three phase voltage source PWM converters a survey

Ngày tải lên : 03/01/2014, 19:45

... 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 ... comparison of current- tracking performance with PI and FL controller: (d) current waveform, and (e) current vector loci was proposed To achieve very fast on-line training (8 s for one training ... rotating coordinates N for a: three two-level hysteresis Fig Hysteresis controller (h = 0:05) (a) Output currents (b) Phase current error (c) Vector current area (d) Output vector current loci 698...

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Fuzzy logic current controller for PWM rectifiers

Ngày tải lên : 03/01/2014, 19:46

... step-response of the id current for conventional PIcontroller (Fig 13a) and FLC controller (Fig 13b) provides tracking of the reference current waveform with 10% smaller overshot in transient for the same ... of hcurrent for change Umxt kom 650 V to 700 V (5 HHZ switching frequency)with: a) conventional PI current controller, b) proposed Fmzy Logic current Controller - FLC - The steadv state for investigated ... 14 Simulated grid currents and grid voltage for steady state, a) the classical PI current controller, b) the proposed FLC Fig 15 Experimental grid currents and grid voltage for steady state,...

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Tài liệu Aspects considering new and current forms of housing for elderly pdf

Ngày tải lên : 14/02/2014, 07:20

... barriers for elderly to think of new possible forms of housing? Are new forms of housing well accepted? (market driven) To differentiate: maintain to live at home vs relocation into a new housing form ... build acceptance / awareness / vision Life course formulations e.g Intentions and behaviour diverge when people gain more information or when unforeseen circumstances aris between the time of their ... money for HCBS programs (p.167) QUESTIONS TO ANSWER AND IMPLEMENT IN THE TEXT What are the advantages for public health when elderly live in their familiar settings as long as possible? (informal...

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SURVEY OF CURRENT GUIDANCE FOR CHILD HEALTH CLINICAL TRIALS pot

Ngày tải lên : 05/03/2014, 10:20

... URL:http://www.hcsc.gc.ca/dhp-mps/prodpharma/applic-demande/guide-ld/clini/e11_addendum-eng.php (55) Task-force in Europe for drug development for the young (TEDDY) Recommendations on ethical issues on medicine for children for European and National Institutions ... Alberta Research Centre for Child Health Evidence (ARCHE) Council for international organizations of medical sciences (CIOMS) Drug Information Association (DIA) European Forum for Good Clinical Practice ... principles for clinical trials E9 ICH 2000 Nonclinical safety studies for the conduct of human clinical trials for pharmaceuticals ICH 2008 Guideline on the format and content of applications for agreement...

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Draft Report on Alternative (Non-Animal) Methods for Cosmetics Testing: current status and future prospects – 2010 doc

Ngày tải lên : 05/03/2014, 16:20

... efforts to bring together existing toxicological 773 information on reproductive toxicology in an electronic format For data that are publicly 774 available (i.e not Confidential Business Information), ... possibility to build local (Q)SARs and 910 perform read-across These are currently limited and can be performed only for obvious 911 (structural) analogues for which a mechanistic basis may be known ... Toxicity DRAFT FOR CONSULTATION 14.07.10 263 The test may be particularly useful as part of the initial screening for the assessment of 264 chemicals for which little or no toxicological information...

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Expansion of Operating Limits for Permanent Magnet Motor by Current Vector Control

Ngày tải lên : 08/03/2014, 22:01

... voltage-limit ellipse and the current- limit circle Therefore, the current regulators are not saturated in all operating regions, and the resultant currents follow the commanded currents Fig shows the ... the armature current I, and the terminal voltage Vu are limited as follows: =I,, The current limit I l h is decided by the continuous armature current rating and the available output current of ... P ~ Y Inverter Current- I imit P =2.0 E o ' O A4(-EO/Xd.0) -2.01 Fig Maximum torque-per-amp current vector trajectory and voltagelimited maximum-output current vector trajectory for Eo > Xdlli,,,...

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Internal audit independence and objectivity: a review of current literature and opportunities for future research ppt

Ngày tải lên : 15/03/2014, 23:20

... training ground for managers Following our review of each of these topics, we discuss opportunities for further research March 2008 INTERNAL AUDIT INDEPENDENCE AND OBJECTIVITY: A REVIEW OF CURRENT LITERATURE ... in order to highlight gaps in knowledge and make recommendations for future research As a basis for our review, we draw on t he current definition of internal audit promulgated by the IIA, together ... performed consulting services and other valueadded activities for many years Several European studies provide evidence of the extent of internal audit engagement in consulting activities For...

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Current Developments for Mutual Fund Audit Committees Quarterly summary doc

Ngày tải lên : 16/03/2014, 14:21

... other market information such as foreign exchange rates, primary or principal exchange, trading volume, fair value factors for international equity securities, coupon and maturity dates for bonds, ... responsible for the model valuation have the requisite knowledge to perform this function Directors clearly look to management to perform the day-to-day valuation Directors therefore should understand ... who first reports information to his or her company’s internal compliance program may be eligible for an award if the company then reports the information to the SEC and the information leads to...

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