previous post

RICH DAD POOR DAD BOOK REVIEW

  RICH  DAD  POOR  DAD  BOOK REVIEW This is amazing book.   • Explodes the myth that you need to earn a high income to become rich • Challenges the belief that your house is an asset • Shows parents why they can't rely on the school system to teach their kids about money • Defines once and for all an asset and a liability • Teaches you what to teach your kids about money for their future financial success It's been nearly 25 years since Robert Kiyosaki’s  Rich Dad Poor Dad  first made waves in the Personal Finance arena. It has since become the #1 Personal Finance book of all time... translated into dozens of languages and sold around the world. Rich Dad Poor Dad  is Robert's story of growing up with two dads — his real father and the father of his best friend, his rich dad — and the ways in which both men shaped his thoughts about money and investing. The book explodes the myth that you need to earn a high income to be rich and explains the difference between working

CHARACTERISTICS OF DC COMPOUND GENERATOR

Cumulatively Compound Generator are more common as compared to Differentially Compound Generator as they have almost constant voltage from No-Load to Full Load.

1. No-Load Characteristics
For long shunt, due to lesser number of turns in series field winding, series MMF does not impact the no-load characteristics.
For short shunt, series field winding does not carry any current and this no-load characteristics is same as that of shunt generator.
Hence, in both cases no-load characteristics are same as that of a Shunt Generator.


2. External Characteristics
In cumulatively compounded generator, series flux adds shunt flux and depending upon number of series field turns, It is classified as

  • Under-compounded: Vt  falls with load
  • Flat-compounded: Vis practically constant
  • Over-compounded: Vrises with load
In differentially compounded generator, series flux opposes shunt flux and thus Vt falls more rapidly with load.

If we plot the characteristics of different generator keeping the No-Load Voltage same in all the cases.
Differentially compounded generators are not impacted by SC as can be seen from characteristics that under Short Circuit conditions the current is limited and hence it is used for welding purposes.
If common operating point is VFL  and  IFL

1 - Series
2 - Over compound
3 - Flat compound
4 - under compound
5 - separately excited
6 - shunt
7 - Differentially compounded

Parallel operation of cumulatively compound generator
Equalizer connection is used to avoid run away of load to any single generator which means one generator should not handle large amount of load. The circuit is shown below:


Comments

Popular posts from this blog

Ideal Transformer (1-phase) Operation Under Load

RICH DAD POOR DAD BOOK REVIEW

Compensating Winding