The main difference between lap and wave winding is the manner of connecting the armature winding coil end to the commutator segment. In simplex winding, the number of parallel paths is equal to the pole, in duplex winding the pole is twice to. Lap winding is the winding in which successive coils overlap each other. Coils are laid out in a wave pattern and cross all the poles. 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. This winding each can connect in progressively and retrogressively depending upon the requirement. Assignment 5 department of electrical and electronics.
For fourpole machine the choice of type of winding depends on the armature current. International journal of engineering research and applications ijera, vol. What is the difference between lap winding and wave. Dec 20, 2015 though both lap and wave types are possible, because of inherent problems of a wave winding, it is now an accepted practice to use the lap type for doublelayer ac winding. Two types of windings mostly employed for drumtype armatures are known as lap winding and wave winding. 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. Lap winding simplex and duplex lap winding electrical4u. Armature winding and motor repair 1920 edition open. It is named lap winding because it doubles or laps back with its succeeding coils. A wave winding may be fitted with as many brushes as the number of poles.
May 03, 2018 best recommended book for electrical engineering competitive examinations. Twolayer winding and multiplex winding electric equipment. The wave winding has only 2 parallel paths between brushes regardless of the number of poles in the machine. 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. At some places it is said that there are two types of lap winding simplex and duplex. Wave winding figure from principles of electric machines and power electronics, 2nd edition, p. Back pitch and front pitch of all the coils remain the same. 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. Lap and wave winding engineering tutorials free download. In armature winding, the conversion of power takes places, i. Armature windings are mainly of two types lap winding and wave winding. This is because the number of parallel path in wave winding is always 2, therefore two carbon brushes are only required. 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 number of poles in the machine called also series winding. Explanation for differing stator winding orientations.
What is the difference between lap winding and wave winding. The most commoly used windings are the simplex lap and wave windings. Each coil is connected to two commutator segments as shown. Wave winding definition of wave winding by merriamwebster. For a given number of poles and armature conductors it gives more emf than that of lap winding. 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. This winding is suitable for small generators circuit with voltage rating 500600v. In wave windings, the number of parallel paths, a, is always two 2, and there may be two or more brush positions. Dc machine armature winding the dc armature windings are always of the closed continuous type of double layer lap or wave winding. Aug 29, 2018 the armature winding is mainly classified into types, i. In large machines, the coils are performed and then inserted into the. Lap winding provides more parallel paths, which means higher current and lower voltage. Figure represents an unrolled lap winding of a dc armature, along with the commutator segments. The only disadvantage of the lap winding is that it requires many conductors which increase the cost of the winding.
In this kind of winding, the ending of one coil is connected to the commutator section as well as the beginning end of the secondary coil can be arranged under a similar pole, and also the digit of parallel lanes is equal to the digit of poles of the windings. Aug 03, 2018 armature windings are mainly of two types lap winding and wave winding. Lap winding coil winding dc armature winding lap and wave winding coil winding machine gingery. 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. In general for small machines, the wave winding is a normal choice though lap. Jul 03, 2016 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. When two adjacent commutator bars make contact with a brush, p2 coils are shorted by the brush in the wave winding. The main difference between lap and wave winding is the manner of. Dc machine types of windings free download as powerpoint presentation. It is suitable for low voltage and high electric current generators disadvantages of lap winding. In lap winding the finishing end of one coil is connected to commutator segment and to the starting end of another coil and soon up to all coils are connected. Advantages of lap winding over wave winding this winding is necessarily required for large current application because it has more parallel paths. Double layer lap winding development of winding ac machine. Singlelayer winding twolayer winding degree of reentrancy of an armature winding multiplex winding lap and wave winding simplex lap winding numbering of coils and commutator segments simplex wave winding dummy or idle coils uses of lap and wave windings types of generators brush contact drop.
I have read some conflicting points about the lap winding. It is suitable for low voltage and high current generators. It has a simple lap winding with 4 conductors per slot. This winding is necessarily required for large electric current application because it has more parallel paths. For armature current up to 400a, wave winding is preffered. 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. A 200 kw, 600 v dc, 6 pole dc shunt generator has an armature with 18 slots per pole. Lap winding is suitable for low voltage and high current generator. Lap winding simplex and duplex lap winding electrical.
This winding is called wave winding from the appearance wavy of the end connections. Wave winding is also sometimes known as series winding. In lap wound motors, as the name implies, the coils overlap each other until the last one joins the first. One end of coil 1 goes to segment a, and the other end of coil 1 goes to segment b. In large machines, the coils are performed and then inserted into the armature slots. 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. The main advantage of wave winding is requirement of lesser amount of conductor and carbon brushes. 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. The wave winding forms a wave with its coil, so it is named as wave winding. In this winding all the pole groups of the coils generating e. The slot on stator core of the threephase motor winding carries stator winding. Coil winding coil winding machine gingery lap winding dc armature winding filament winding lap and wave winding coil packs bike cdi coil condenser coil musical tesla coil bike coil tester carrier condenser coil replacement hoe to replace a coil pack on a citroen c2 bike coil tester with multimiter design of a helical coil spring drsstc. Hence wave winding is used in high voltage and low current machines. Lap winding is suitable for low voltage heavy current applications, while wave winding is used in high voltage low current applications.
Lap and wave winding simplexlap winding numbering of coils and commutator segments simplex wave winding dummy or idle coils uses of lap and wave windings types of generators brush contact drop generated e. Calculate the speed at which it is to be driven for rated load operation. Because wave windings have only two parallel paths, this winding is more suited for highvoltage, lowcurrent dc. Armature windings lap and wave windings year 2 youtube.
Advantages of wave winding over lap winding in this winding only two brushes are required but more parallel brushes can be added to make it equal to the no. Best recommended book for electrical engineering competitive examinations. Lap winding definition of lap winding by merriamwebster. The armature and shunt field winding has resistance of 0. Lap winding simplex and duplex lap winding electrical study. The lap winding has many paths and hence it is used for the larger current applications. In lap winding, the conductors are joined in such a way that their parallel paths and poles are equal in number. Electrical machines questions and answers engineering.
The winding in which successive coils overlap each other is known as lap winding. The lap winding needs an equalizer for the improved commutation whereas the wave winding needs the replica coil to provide the mechanical stability toward the. In generators we employ two types of winding in the armature. Pdf winding diagrams are an integral part of electrical machine design. The armature coils are connected to commutator segments of commutator on opposite sides of the armature. Double layer windings fall into two main classes depending upon the value of spp integral slot winding when spp is an integer and fractional slot winding when spp is a.
Above we discussed difference between lap winding and wave winding briefly. Armature winding and motor repair practical information and data covering winding and reconnectig procedure for direct and alternating current machines, compiled for electrical men responsible for the operation and repair of motors and generators in industrial plants and for repairmen and armature winders in electrical repair shops. In lap winding the top and bottom coil ends are connected to adjacent commutator segment whereas in wave winding, they are bent in opposite direction and connected to commutator segments which are approximately two pole pitches apart. 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. Dec 02, 2014 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. The windings used in rotating electrical machines can be classified as. 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. Difference between lap winding and wave winding table format. Electrical machines questions and answers engineering tutorial.
Three phase ac double layer wave winding diagram, a simplified method. The old grammering armature,now obselete is shown in figure view a. 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. Since a wave winding is a series winding, it is used for high voltage and low current machine. This winding can be supplied with 3phase ac supply. The simplex and duplex are the types of lap windings. Advantages of wave winding over lap winding electrical concepts.
The difference between the two is merely due to the different arrangement of the end connections at the front or commutator end of armature. A self excited generator fails to excite if driven at too low a speed. Lap and wave winding your working experience is the best. Concentric and lap wound windings effect on a ric concentric wound motors are usually machine wound with individual coils stacked rather than lapped. The motor winding in threephase which is connected in star or delta form based on the type of starting method used. Wave winding is suitable for high voltage but a low current generator. Though both lap and wave types are possible, because of inherent problems of a wave winding, it is now an accepted practice to use the lap type for doublelayer ac winding. The copper conductor may be of circular or rectangular crosssection. Read more advantages of wave winding over lap winding. Pdf three phase ac double layer wave winding diagram, a.
Characteristics of simplex lap winding from the winding diagram shown in previous post the following conclusions regarding simplex lap winding are arrived at. Dc machine types of windings electromagnetic induction. Figure represents an unrolled wave winding of a dc armature, along with the commutator segments bars and stationary brushes. Difference between lap and wave winding electrical concepts. The purpose in using one over the other has a lot to do with ease of manufacture and application. The first photo 45deg shows a lap winding while the second photo 0deg shows a distributed winding for sinusoidal wave. Winding differ in the way the end connections at the front and at the commutator end. Mar 06, 2017 in this video, you will learn about armature windings, lap and wave type of armature windings, equalizer rings and dummy coils. In this video, you will learn about armature windings, lap and wave type of armature windings, equalizer rings and dummy coils.