Lap and wave winding engineering tutorials free download. Winding differ in the way the end connections at the front and at the commutator end. Procedures are described for wave winding armatures to be used in dynamoelectric machines having four or more poles utilizing flier type armature winding machines. The armature and shunt field winding has resistance of 0. In this video, you will learn about armature windings, lap and wave type of armature windings, equalizer rings and dummy coils. A wave winding may be fitted with as many brushes as the number of poles. Lap winding is the winding in which successive coils overlap each other. Twolayer winding and multiplex winding electric equipment. One end of coil 1 goes to segment a, and the other end of coil 1 goes to segment b.
Lap winding is suitable for low voltage heavy current applications, while wave winding is used in high voltage low current applications. The wave winding has only 2 parallel paths between brushes regardless of the number of poles in the machine. In such case, if one or more brushes develop poor contact with the commutator, the commutator machines continues to operate satisfactorily whereas this is not so in case of lap connected machines for obtaining better commutation a lap connected machines requires equalizer ring whereas it is not required in wave. Characteristics of simplex lap winding from the winding diagram shown in previous post the following conclusions regarding simplex lap winding are arrived at.
It is the place where energy conversion takes place, i. Lap winding coil winding dc armature winding lap and wave winding coil winding machine gingery. In this winding, we connect the end of one coil to the starting of another coil of the same polarity as that of the first coil. The slot on stator core of the threephase motor winding carries stator winding.
The armature coils are connected to commutator segments of commutator on opposite sides of the armature. In this way, the winding progresses, passing successively under every npole and spole till it returns to a conductor a. The motor winding in threephase which is connected in star or delta form based on the type of starting method used. Lap winding is suitable for high current and low voltage generators while wave windings is for high voltage and low current generators, it is because lap winding carries more current as it has more parallel paths than wave winding.
It is also called series winding because its coils are connected in series in the wave winding, the conductors are connected to two parallel paths irrespective of the number of poles of the machine and parallel paths are provided between the positive and negative brushes. Usually, one side of every coil lies in the upper half of one slot and other side lies in the lower half of some other slot at a distance of approximately one pitch away fig. Dc generators mcq questions answers electrical engineering. The wave winding forms a wave with its coil, so it is named as wave winding. Whats the difference between wave and lap winding, for a. What is the difference between lap winding and wave. Lap winding definition is a drum winding for generator and motor armatures in which each coil or set of windings overlaps the next so that there are as many armature paths as there are fieldmagnet poles. Most windings process tries to make it easier to automate the insertion of the coils into the slots of the stator. This ppt shows the working principle of dc generator,types of armature winding its designing aspectni. A simplex lap winding is a rotor armature winding consisting of coils containing one or more turns of wire with the two end of each coil coming out at adjacent commutator segments fig.
This winding is necessarily required for large electric current application because it has more parallel paths. The purpose in using one over the other has a lot to do with ease of manufacture and application. The applications of lap winding mainly involve in huge current applications. The only disadvantage of the lap winding is that it requires many conductors which increase the cost of the winding. For small machines, the coils are directly wound in the armature slots using automatic winders. Dc machine types of windings electromagnetic induction.
Because the winding progresses in one direction round the armature in a series of waves, it is known as wave winding. Labcorp the worlds leading health care diagnostics company. Wave winding definition is an armature winding in which the coils are laid in two layers and follow each other on the surface of the armature in the form of waves with the coils being so connected in series that there are only two paths for the flow of current whatever. The most commoly used windings are the simplex lap and wave windings. Assignment 5 department of electrical and electronics. Difference between lap winding and wave winding table format. It is named lap winding because it doubles or laps back with its succeeding coils. Double layer lap winding development of winding ac machine. Armature windings are mainly of two types lap winding and wave winding. The armature has 536 conductors connected as a lap winding. This winding each can connect in progressively and retrogressively depending upon the requirement. One of the major difference between them is that in a lap winding the end of each coil are connected to the adjacent segment whereas in the wave winding the end. Lap definition is a loose overlapping or hanging panel or flap especially of a garment.
Huanuo lap laptop desk portable lap desk with pillow cushion, fits up to 15. Difference between lap and wave winding electrical concepts. A self excited generator fails to excite if driven at too low a speed. Above we discussed difference between lap winding and wave winding briefly. A 200 kw, 600 v dc, 6 pole dc shunt generator has an armature with 18 slots per pole. This document is highly rated by students and has been viewed 276 times. Lapgear designer lap desk with phone holder and device ledge gray damask fits up to 15. Figure represents an unrolled lap winding of a dc armature, along with the commutator segments. International journal of engineering research and applications ijera, vol. The first photo 45deg shows a lap winding while the second photo 0deg shows a distributed winding for sinusoidal wave.
Pdf three phase ac double layer wave winding diagram, a. Wave winding figure from principles of electric machines and power electronics, 2nd edition, p. In lap winding, the coil end is allied to the nearby commutator section, while in the wave winding the armature end coil is located within the commutator section. The dc machine runs at 1050 rpm and it delivers a rated armature current of 225 a to a load. Lap winding article about lap winding by the free dictionary. Figure represents an unrolled wave winding of a dc armature, along with the commutator segments bars and stationary brushes. There are kinds of winding way when design a motor,there is a wave winding diagram for example slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising.
I have read some conflicting points about the lap winding. The lap winding has many paths and hence it is used for the larger current applications. Electrical machines questions and answers engineering. In this winding all the pole groups of the coils generating e. In lap winding a coil side under one pole is connected directly to a coil side which occupies a nearly corresponding position under the next pole by means of back connections, and this second coil is then connections, and this second coil is then connected back through the commutator segment, to a coil side under the original pole, but. Labcorp recognizes virtual healthcare is the new normal for physicians and their patients due to covid19. This winding can be supplied with 3phase ac supply. In generators we employ two types of winding in the armature. In this type of winding, the digit of parallel lanes among the pole is double the digit of poles.
Wave winding definition of wave winding by merriamwebster. In this type of winding, there are two conductors or coil sides per slot arranged in two layers. The total power losses in the block wave winding is less than the one resulting from the use of lap winding, since the number of wave winding blocks located in the active region is 3 times less than the number of lap winding blocks. The copper conductor may be of circular or rectangular crosssection. The side of a coil 1turn or multiturn is called a winding element.
Dc machine armature winding the dc armature windings are always of the closed continuous type of double layer lap or wave winding. Armature windings lap and wave windings year 2 youtube. Lap synonyms, lap antonyms merriamwebster thesaurus. In large machines, the coils are performed and then inserted into the. Dc machine types of windings free download as powerpoint presentation. In this type of winding the coil side a b progresses forward around the armature to another coil side and goes on successively passing through n and s pole till it returns to a conductor a 1b 1 lying under the. After the winding of each coil or pair of coils, the armature is rotated through 360 electrical degrees plus or minus the angle between adjacent armature slots to position the armature for the winding of the next coil or pair of coils. Back pitch and front pitch of all the coils remain the same. The front area from the waist to the knees of a seated person. Lap winding definition of lap winding by merriamwebster. Bbuild up the layout of a lap winding for a 3 phase ac machine comprising 4 pole and 24 slots. This winding is called wave winding from the appearance wavy of the end connections. The winding starting from any coil side returns back to that very coil side after connecting all the coil sides once and only once hence it is singly reentrant closed winding. It is suitable for low voltage and high electric current generators disadvantages of lap winding.
Lap winding provides more parallel paths, which means higher current and lower voltage. Were in this together, and labcorp offers online resources that healthcare providers and your patients can access to assist with telemedicine efforts to continue acute care and chronic condition monitoring. At some places it is said that there are two types of lap winding simplex and duplex. The main difference between lap and wave winding is the manner of. The old grammering armature,now obselete is shown in figure view a. Three phase ac double layer wave winding diagram, a simplified method. In this type of winding the coil sideab progressforward around the armature to another coil side and goes on successively passing through n and s pole till it returns. C machines armature lap and wave winding notes edurev is made by best teachers of. In wave winding, only two parallel paths are provided between the positive and negative brushes. Lap and wave winding your working experience is the best.
Example draw a developed diagram of a simple 2 layer lap. Best recommended book for electrical engineering competitive examinations. Lap definition, the front part of the human body from the waist to the knees when in a sitting position. Laps definition, the front part of the human body from the waist to the knees when in a sitting position. Coils are laid out in a wave pattern and cross all the poles. 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. I would suggest that you visit a electrical workshop which does rewinding work and or a motor manufacturer, to really understand the practical methods of layout, winding, identification and connection of the coi.
In armature winding, the conversion of power takes places, i. Wave winding is also sometimes known as series winding. Valtteri bottas wins australian grand prix as mercedes get off to a flyer he said lap planned to give bonus to its employees based on the key performance indicators in future. Lap 58 of 58 bottas wrestles back the fastest lap and is about to win the first grand prix of 2019. Since a wave winding is a series winding, it is used for high voltage and low current machine. Lap winding simplex and duplex lap winding electrical4u. Each coil is connected to two commutator segments as shown. Lap winding simplex and duplex lap winding electrical.
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