- Trending Categories
- Data Structure
- Operating System
- C Programming
- Social Studies
- Fashion Studies
- Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Types of Armature Winding of a DC Machine - Lap Winding and Wave Winding
In DC machines, the drum type armature windings are used. In the case of drum type winding, the armature conductors (in the form of coils) are placed in the slots around the surface of cylindrical or drum shaped armature core. The coils are connected in series through the commutator segments such that their EMFs are added to each other.
In DC machines, two types of armature windings are used −
- Wave Winding
- Lap Winding
In the case of wave winding, the armature coils are connected in series through the commutator segments in such a way that the armature winding is divided into two parallel paths irrespective of the number of poles of the machine, i.e.,
If Z being the total number of armature conductors, then each parallel path has Z/2 armature conductors in series. Each parallel path carry a current of Ia/2, where Ia is the total armature current. In the case of wave winding, the generated emf is equal to the EMF across each parallel path.
Applications of Wave Winding
The wave windings are used in small machines, since in the case of small machines the current carrying capacity of armature conductors is not critical.
In lap winding, the armature coils are connected in series through the commutator segments in such a way that the armature winding is divided into as many parallel paths as the number of poles of the machine, i.e.,
If Z is the total number armature conductors and P is the number of poles in the machine, then there will be P parallel paths in the winding and the number of conductors in each parallel path will be,
If Ia being the total armature current, then
The EMF generated in the lap winding is equal to the EMF in each parallel path.
Applications of Lap Windings
The lap windings are used in large machines, because in the large machines current carrying capacity is more critical.
- What is a Three Winding Transformer?
- Determination of Voltage Regulation of a Three Winding Transformer
- Difference between Two-Winding Transformer and Autotransformer
- Conversion of a Two Winding Transformer into an Autotransformer
- Performance Analysis of Single-Phase Single-Winding Induction Motor
- Pitch Factor, Distribution Factor, and Winding Factor for Harmonic Waveforms
- Short-Circuit Test and Open-Circuit Test on a Three-Winding Transformer
- Winding EMFs in a 3-Phase Induction Motor; Stator EMF and Rotor EMF
- Boojho made an electromagnet by winding 50 turns of wire over an iron screw. Paheli also made an electromagnet by winding 100 turns over a similar iron screw. Which electromagnet will attract more pins? Give reason.
- The strength of the magnetic field between the poles of an electromagnet would be unchanged if:(a) current in the electromagnet winding were doubled (b) direction of current in electromagnet winding were reversed (c) distance between the poles of electromagnet were doubled (d) material of the core of electromagnet were changed
- Armature Reaction in a DC Generator
- Swinburne’s Test of DC Machine – Testing of DC Machines
- Torque in DC Motor - Armature Torque and Shaft Torque
- Types of DC Motor
- Types of DC Generator – Separately Excited and Self-Excited DC Generators