computer aided ppt

Presented by,1.Nayan Kosare2.Kunal Dhakate 3.Sneha Dhote4.Shridhika

……

COMPUTER APPLICATION IN ELECTRICAL MACHINE DESIGN

DID YOU

KNOW

…machine design can be achieved by…..

Judgement

..to achieve higher accuracy and minimum time for manual design…

Intuition

…user friendly..

Understanding

…performance, cost, life, operating range, maintenance…

1950, “Common Design Procedure”, an approach to the problems of electrical machine design…

• 1956, Wlliams and Moore - application of digital computers for design of rotating machine• 1956, Veinott -application of digital computers for design of induction motor

1959, Heroz’et - concept of acceptable approaches to machine design 1. Analysis method 2. Synthesis method

Analysis method

...use of computer only for the purpose of analysis leaving all exercise of judgement to the designer..

Advantages –1.Easy2.Time saving3.Simple4.Acceptable result

Synthesis method

…provides an optimum design such that the program or computer run does not interrupted for the designer to take logical decisions…

Advantages –1.Time saving2.Decision making by computers

Computer aided design of transformer

…for the design with the rating upto 1 MVA oil immersed type three phase transformer…

Core design

1. Square 2. Cruciform3. 3- Stepped4. 4- Stepped

Window dimensions

1.Self oil cooled upto 50 KVA 2.Current density 1.1 to 2.3 A/mm

sqr3.Flux density in window section is

same as that of in core section4.For water cooled type, current

density is 5.4 to 6.2 A/mm sqr

Yoke design

1. Area of the yoke is 15 to 25 % larger than that of core2. May be rectangular or stepped3. In rectangular shape, yoke highest side of the laminated core is taken as depth of the yoke

Low voltage winding design

1.Line voltage depend upon type of connection

2.Helical, cylindrical, cross over

3.Based on the area of conductor

High voltage winding1.Voltage per coil depends upon

type of winding2.Voltage between layers should

not exceed 300 V3.For current below 20 A, cross

over winding is used otherwise helical winding is used

So, what does it all mean?

COMPUTER APPLICATION

IN ELECTRICAL MACHINE DESIGN

NOW YOU

KNOW