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Design of dc armature winding
The document discusses the design of DC armature winding, highlighting the types, terms, and characteristics of armature windings, including lap and wave winding. It explains the configurations, advantages, and requirements for different winding types, such as simplex and duplex lap winding, as well as progressive and retrogressive wave winding. Additionally, the document includes references for further reading on the topic.
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Design of dc armature winding
- 1. Subject – Elementsof Electrical Design (2150904) Branch – Electrical Topic – Design of DC Armature Winding Name Enrollment No. Abhishek Chokshi 140120109005 Himal Desai 140120109008 Gandhinagar Institute Of Technology Guided By – Prof. Jaimini Gohel
- 2. CONTENT • Armature winding •Terms Related to Armature Winding • Types of Armature Winding DC WINDINGS • Lap Winding • Simplex Lap Winding • Duplex Lap Winding • Condition for Lap Winding • Wave Winding • Progressive Wave Winding • Retrogressive Wave Winding • Condition for Wave Winding • Comparison of Lap Winding and Wave Winding • Examples
- 3. Armature winding • Thearmature winding is the main current-carrying winding in which the electromotive force or counter-emf of rotation is induced. • The current in the armature winding is known as the armature current. • The location of the winding depends upon the type of machine. • The armature windings of dc motors are located on the rotor, since they must operate in union with the commutator. • In DC rotating machines other than brushless DC machines, it is usually rotating.
- 4. Terms related toArmature Winding • Conductor: The length of wire embedded in the slot • Turn: The two conductor placed in different slots when connected together to form a turn. • Coil: The two active conductor i.e back and front conductor constitute one coil. The coil may be single turn coil or multi turn coil.
- 8. Types of ArmatureWinding • According to the way of connecting the conductors, DC armature windings are classified as: Armature Winding Lap Winding Wave Winding
- 9. Lap Winding • Lapwinding is the winding in which successive coils overlap each other. It is named "Lap" winding because it doubles or laps back with its succeeding coils. • In this winding the finishing end of one coil is connected to one commutator segment and the starting end of the next coil situated under the same pole and connected with same commutator segment.
- 10. Simplex Lap Winding •A winding in which the number of parallel path between the brushes is equal to the number of poles is called simplex lap winding.
- 11. Duplex Lap Winding •A winding in which the number of parallel path between the brushes is twice the number of poles is called Duplex lap winding.
- 12. Condition for SimplexLap Winding
- 13. Wave Winding • Wavewinding is one type of armature winding. In this winding the end of one coil is connected to the starting of another coil of the same polarity as that of the first coil. • This winding forms a wave with its coil, that’s why it is named as wave winding. It is also called series winding because its coils are connected in series.
- 14. Progressive Wave Winding •If after one round of the armature the coil falls in a slot right to its starting slot the winging is called Progressive wave winding.
- 15. Retrogressive Wave Winding •If after one round of the armature the coil falls in a slot left to its starting slot the winging is called Retrogressive wave winding.
- 16. Condition for SimplexWave Winding
- 17. Lap Winding WaveWinding 1. In this winding all the pole groups of the coils generating e.m.f in the same direction at any instant of time are connected in parallel by the brushes. 1. In this winding all the coils carrying current in the same direction are connected in series i.e., coils carrying current in one direction are connected in one series circuit and coils carrying current in opposite direction are connected in other series circuit. 2. Lap winding is also known as parallel windings. 2. Wave winding is also known as series winding. 3. The number of parallel path is equal to the number of poles i.e., A = P. 3. The number of parallel paths is always equal to 2 i.e., A = 2. 4. The number of brush required by this windingis always equal to the number of poles. 4. The number of brushes required by this winding is always equal to 2. 5. The machine using lap winding requires equalizer rings for obtaining better commutation. 5. The machine using wave winding does require dummy coils to provide the mechanical balance for the armature. 6. Lap windings are used for low voltage and high current machines. 6. Wave windings are used for high voltage and low current machines. 7. Lap windings are generally used for machines of ratings above 500 kW. 7. Wave windings are generally used for machines of ratings below 560 kW
- 19. Winding Table: 1 1019 28 3 12 21 30 5 14 23 32 7 16 25 34 9 18 27 2 11 20 29 4 13 22 31 6 15 24 33 8 17 26 1 ( ) indicate back connection ( ) indicate front connection
- 21. Winding Table: 1 63 8 5 10 7 12 9 14 11 16 13 2 15 1 ( ) indicate back connection ( ) indicate front connection
- 22. References • www.wikipedia.org • https://iitg.vlab.co.in/ •https://coep.vlab.co.in/ • https://www.youtube.com/watch?v=jttjCzv_rQo • Techmax Publication