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    Cad Lab Manual

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    RAM SINGH
    This document provides a flowchart for the optimal design of DC machines and transformers. It first discusses the construction and working principle of DC machines, including their components like the yoke, pole shoes, field winding, armature core and winding, and commutator. It then discusses the applications of different types of DC motors. The document also provides an introduction to transformers and their basic components. It explains their working principle of mutual inductance and classification based on phase, core type, and cooling system. It defines step-up and step-down transformers based on the relationship between primary and secondary winding turns.

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    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd

    Cad Lab Manual

    Uploaded by

    RAM SINGH
    65 views1 page
    This document provides a flowchart for the optimal design of DC machines and transformers. It first discusses the construction and working principle of DC machines, including their components like the yoke, pole shoes, field winding, armature core and winding, and commutator. It then discusses the applications of different types of DC motors. The document also provides an introduction to transformers and their basic components. It explains their working principle of mutual inductance and classification based on phase, core type, and cooling system. It defines step-up and step-down transformers based on the relationship between primary and secondary winding turns.

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    ELECTRICAL CAD LAB

    Original Title

    CAD LAB MANUAL

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    This document provides a flowchart for the optimal design of DC machines and transformers. It first discusses the construction and working principle of DC machines, including their components like the yoke, pole shoes, field winding, armature core and winding, and commutator. It then discusses the applications of different types of DC motors. The document also provides an introduction to transformers and their basic components. It explains their working principle of mutual inductance and classification based on phase, core type, and cooling system. It defines step-up and step-down transformers based on the relationship between primary and secondary winding turns.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    65 views1 page

    Cad Lab Manual

    Uploaded by

    RAM SINGH
    This document provides a flowchart for the optimal design of DC machines and transformers. It first discusses the construction and working principle of DC machines, including their components like the yoke, pole shoes, field winding, armature core and winding, and commutator. It then discusses the applications of different types of DC motors. The document also provides an introduction to transformers and their basic components. It explains their working principle of mutual inductance and classification based on phase, core type, and cooling system. It defines step-up and step-down transformers based on the relationship between primary and secondary winding turns.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
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    Flowchart for optimal design of dc machine and transfomer


    1. 1. Prepared By:- Nisarg Amin Topic:- Flowchart For Optimal Design Of DC Machine And Transfomer
    2. 2. Flowchart For Optimal Design Of DC Machine
    3. 3. Construction Of A DC Machine
    4. 4. Construction of DC Machine
    5. 5. • Yoke : It provide mechanical Support for poles & protection. • Pole Shoe : It is extended part of pole & enlarge area of
    pole. • Field Winding : When Current is passed through field winding it electro magnetize the poles which produce
    necessary flux. • Armature Core & Winding : It provide path of low reluctance to the flux produced by field winding & when
    armature winding is rotated using prime mover. the magnetic flux and voltage gets induced in it. • Commutator : It Convert
    alternating current, collects the current form armature conductor and pass it load with the help of brushes & provide
    unidirectional torque for dc motor.
    6. 6. Working Principle • In a basic dc motor, an armature is placed in between magnetic poles. If the armature winding is
    supplied by an external dc source, current starts flowing through the armature conductors. • As the conductors are
    carrying current inside a magnetic field, they will experience a force which tends to rotate the armature. Suppose armature
    conductors under N poles of the field magnet, are carrying current downwards (crosses) and those under S poles are
    carrying current upwards (dots). • By applying Fleming’s Left hand Rule, the direction of force F, experienced by the
    conductor under N poles and the force experienced by the conductors under S poles can be determined. It is found that at
    any instant the forces experienced by the conductors are in such a direction that they tend to rotate the armature.
    7. 7. APPLICATION • DC Shunt Motors is a constant speed motor. (Lathes, Drills, Boring mills, Shapers, Spinning and
    Weaving machines) • DC Series motor is a variable speed motor. (Electric traction, Cranes, Elevators, Air compressor,
    Vacuum cleaner, Hair drier, Sewing machine) • DC Compound motor, thedifferential compound motors are rarely used
    because of its poor torque characteristics. (Presses Shears, Reciprocating machine)
    8. 8. Disadvantages • High initial cost • Increased operation and maintenance cost due to presence of commutator and
    brush gear • Cannot operate in explosive and hazard conditions due to sparking occur at brush ( risk in commutation
    failure)
    9. 9. Flowchart For Optimal Design Of Transformer
    10. 10. Introduction • Transformer is a device consisting of two or more coils that are used to couple electrical energy from
    one circuit to another while maintaining electrical isolation between the two. • Primary Winding – Winding of the
    transformer that is connected to the source. • Secondary Winding – Output winding of the transformer that is connected to
    the load.
    11. 11. Working Principle • Mutual inductance • Mutual Inductance – The ability of one inductor’s magnetic field lines to link
    with another inductor.
    12. 12. Transformer action
    13. 13. Classification of transformer • As per phase: 1. Single phase 2. Three phase • As per core: 1. Core type 2. Shell type •
    As per cooling system: 1. Self-cooled 2. Air cooled 3. Oil cooled
    14. 14. Step up transformer • A step up transformer is a type of transformer that increases voltage from primary to secondary
    (more secondary winding turns than primary winding turns) is called a step up transformer.
    15. 15. Step down transformer • A step down transformer is a type of transformer that decreases voltage from primary to
    secondary (less secondary winding turns than primary winding turns) is called a step down transformer.

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