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.
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.
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.
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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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.
