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Title: mmf and emf formula
Page Link: mmf and emf formula -
Posted By:
Created at: Friday 26th of October 2012 05:24:37 PM
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Formula for emf and mmf, similarities between emf and mmf and difference ....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: smart paper boy
Created at: Friday 29th of July 2011 05:51:20 PM
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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: REGULATION OF 3-PHASE ALTERNATOR BY POTIER AND ASA METHODS
Page Link: REGULATION OF 3-PHASE ALTERNATOR BY POTIER AND ASA METHODS -
Posted By: smart paper boy
Created at: Friday 29th of July 2011 05:51:34 PM
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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.
(iii) Ini ....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: smart paper boy
Created at: Wednesday 10th of August 2011 12:37:21 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 ....etc

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Title: Automatic voltage regulation of alternator used in UKAI PP
Page Link: Automatic voltage regulation of alternator used in UKAI PP -
Posted By: chodekiran
Created at: Friday 05th of March 2010 12:53:47 PM
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. Automatic voltage regulation of alternator used in UKAI PP ....etc

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Title: advantages and disadvantages of mmf method
Page Link: advantages and disadvantages of mmf method -
Posted By:
Created at: Thursday 12th of April 2018 07:19:05 AM
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I want ans for this question .plz try to say fast ....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: smart paper boy
Created at: Wednesday 10th of August 2011 12:44:37 PM
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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: Automatic voltage regulation of alternator used in UKAI PP
Page Link: Automatic voltage regulation of alternator used in UKAI PP -
Posted By: chodekiran
Created at: Friday 05th of March 2010 12:56:28 PM
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related information of Automatic voltage regulation of alternator ....etc

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Title: hii iam ramakanth i would like to get details why mmf method is optimistic
Page Link: hii iam ramakanth i would like to get details why mmf method is optimistic -
Posted By:
Created at: Tuesday 08th of August 2017 10:58:48 PM
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HI IAM ramakanth i would like to know why the mmf meathod is optimistic ? and why emf meathod is pesimistic ....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: smart paper boy
Created at: Wednesday 22nd of June 2011 07:04:12 PM
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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 compen ....etc

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