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Title: mmf and emf formula
Page Link: mmf and emf formula -
Posted By: MalathiRamasamy
Created at: Thursday 17th of August 2017 05:44:59 AM
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Formula for emf and mmf, similarities between emf and mmf and difference ....etc

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Title: REGULATION OF THREE-PHASE SALIENT POLE ALTERNATOR BY SLIP TEST
Page Link: REGULATION OF THREE-PHASE SALIENT POLE ALTERNATOR BY SLIP TEST -
Posted By: jayshah
Created at: Thursday 17th of August 2017 04:43:37 AM
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AIM
To conduct the slip test on three phase alternator and predetermination the regulation through vector diagrams
APPARATUS REQUIRED
PRECAUTION
1. The Motor field Rheostat should be kept in minimum resistance position.
2. The Alternator field should be kept open throughout the experiment.
3. The direction of rotation due to prime mover and due to the Alternator run as the motor should be same.
4. Initially all the switches are kept open
PROCEDURE
1. The name plate details of the motor an ....etc

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Title: why inductive load is used in zpf method
Page Link: why inductive load is used in zpf method -
Posted By: vijay_madhav
Created at: Thursday 17th of August 2017 08:34:30 AM
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This method is also called potier method. In the operation of any alternator, the armature resistance drop and armature leakage reactance drop IXL are actually e.m.f. quantities while the armature reaction is basically m.m.f. quantity. In the synchronous impedance all the quantities are treated as e.m.f. quantities as against this in M.M.F. method all are treated as m.m.f. quantities. Hence in both the methods, we are away from reality.
Note : This method is based on the separation of armature leakage reactance and armature reaction effects. ....etc

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Title: difference between wifi and hifi and gifi and mifi and lifi
Page Link: difference between wifi and hifi and gifi and mifi and lifi -
Posted By: sathpo
Created at: Thursday 17th of August 2017 06:51:02 AM
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In any analysis of innovation, 802.11 is truly a prime number. This evolving standard, better known as Wi-Fi, is the it protocol that s won the same spectacular hype as (whisper it softly) the Internet itself. Oh, the good old days. I miss them.

But while Wi-Fi undeniably inspires that intoxicating blend of expectation and excitement that leads to entrepreneurial excess, it s also the kind of technological platform that invites the best ideas. Wi-Fi s combination of well-crafted technical standard and regulation-free deployment offers a ....etc

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Title: REGULATION OF 3-PHASE ALTERNATOR BY POTIER AND ASA METHODS
Page Link: REGULATION OF 3-PHASE ALTERNATOR BY POTIER AND ASA METHODS -
Posted By: obady
Created at: Thursday 17th of August 2017 06:16:16 AM
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AIM:
To predetermine the regulation of three phase alternator by Potier and ASA methods and also to draw the vector diagrams.
FORMULAE USED:
Percentage regulation = Eo Vrated x 100 (For both POTIER & ASA methods)
Vrated
PRECAUTION:
(i) The motor field rheostat should be kept in the minimum resistance position.
(ii) The Alternator field potential divider should be in the position of minimum potential.
(ii) Initially all switches are in open position.
PROCEDURE FOR BOTH POTIER AND ASA MET ....etc

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Title: A New Induction Motor Vf Control Method Capable of High-Performance Regulation
Page Link: A New Induction Motor Vf Control Method Capable of High-Performance Regulation -
Posted By: azar
Created at: Thursday 17th of August 2017 06:11:09 AM
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A New Induction Motor V/f Control Method Capable of High-Performance Regulation at Low Speeds
Abstract
A novel open-loop speed control method for induction motors that provides high output torque and nearly zero steady-state speed error at any frequency is presented. The control scheme is based on the popular constant volts per hertz (V/f) method using low-cost open-loop current sensors. Only stator current measurements are needed to compensate for both stator resistance drop and slip frequency. The scheme proposed fully compens ....etc

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Title: REGULATION OF 3PHASE ALTERNATOR BY EMF AND MMF METHODS
Page Link: REGULATION OF 3PHASE ALTERNATOR BY EMF AND MMF METHODS -
Posted By: krumeshece
Created at: Thursday 17th of August 2017 05:44:59 AM
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THEORY:
The regulation of a 3-phase alternator may be predetermined by conducting the Open Circuit (OC) and the Sort Circuit (SC) tests. The methods employed for determination of regulation are EMF or synchronous impedance method, MMF or Ampere Turns method and the ZPF or Potier triangle method. In this experiment, the EMF and MMF methods are used. The OC and SC graphs are plotted from the two tests. The synchronous impedance is found from the OC test. The regulation is then determined at different power factors by ....etc

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Title: why asa method is superior to zpf method
Page Link: why asa method is superior to zpf method -
Posted By:
Created at: Sunday 28th of November 2021 08:19:31 PM
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why asa method is superior to zpf method ....etc

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Title: REGULATION OF THREE PHASE ALTERNATOR BY EMF MMF and ZPF
Page Link: REGULATION OF THREE PHASE ALTERNATOR BY EMF MMF and ZPF -
Posted By: surmiya
Created at: Friday 06th of October 2017 03:07:20 PM
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AIM
To conduct OC, SC and ZPF test on the three phase alternator and to predetermine the regulation of 3 phase alternator by EMF method, MMF method, & ZPF method also to verify by vector diagram.
APPARATUS REQUIRED
PRECAUTION

1. The motor field rheostat should be kept in the minimum resistance position.
2. The alternator field potential divider should be in the minimum voltage position.
3. Initially all switches are in open position.
PROCEDURE
A. OC.Test

1. Note down the name plate details ....etc

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Title: difference between multi speciality and super speciality and general hospital ppt
Page Link: difference between multi speciality and super speciality and general hospital ppt -
Posted By: shoeb
Created at: Thursday 05th of October 2017 04:20:22 AM
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