The motor winding in threephase which is connected in star or delta form based on the type of starting method used. 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 lap winding needs an equalizer for the improved commutation whereas the wave winding needs the replica coil to provide the mechanical stability toward the. Lap winding is suitable for low voltage heavy current applications, while wave winding is used in high voltage low current applications.
What is lap winding and wave winding difference between lap winding and wave winding. The rotating machine which has an essential part which is known as armature winding. The first photo 45deg shows a lap winding while the second photo 0deg shows a distributed winding for sinusoidal wave. A new simplex wave winding permanentmagnet brushless dc. 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. Assume each slot can accommodate two sides of two different coils.
Lap winding simplex and duplex lap winding electrical. For small machines, the coils are directly wound in the armature slots using automatic winders. Armature windings are mainly of two types lap winding and wave winding. 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.
Lap and wave winding winding concept latest update. The simplex and duplex are the types of lap windings. 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. Nov 30, 2018 the main difference between lap and wave winding is the manner of connecting the armature winding coil end to the commutator segment. A lap wound machine can be distinguished from a wave wound by looking at the direction of the endwindings at the end of a slot assuming they arent completely obscured by the banding if they both point the same way i. It is generally used for machines having power rating less than 50 kw. The applications of lap winding mainly involve in huge current applications.
A frogleg winding is used in a dc machine to eliminate reactance voltage produced due to commutation. Lap winding is the winding in which successive coils overlap each. Lap winding simplex and duplex lap winding electrical4u. Ac double layer wave winding diagram is one such type of winding where the method of making connections is slightly complicated and students find it difficult to understand. Lap and wave winding winding concept latest update 2018. 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 is suitable for high voltage but a low current.
Most windings process tries to make it easier to automate the insertion of the coils into the slots of the stator. The basic difference between these two windings is that in lap winding end of every coil is attached with the neighboring point and in wave winding the endpoint of winding is connected with the point at some distance. Difference between lap and wave winding electrical concepts. In large machines, the coils are preformed and then inserted into the armature slots. Basically armature winding of a dc machine is wound by one of the two methods, lap winding or wave winding. Dc motor lap winding progressive vs retrogressive winding. The machine using lap winding requires equalizer rings for obtaining better commutation.
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 into the armature slots using automatic winders. In wave winding, only two parallel paths are provided between the positive and negative brushes. Two types of windings mostly employed for drumtype armatures are known as lap winding and wave winding. Difference between lap and wave winding the engineering.
The armature coils are connected to commutator segments of commutator on opposite sides of the armature. Yr is even because it is the difference between two odd numbers. In lap winding the finishing end of one coil is connected to the adjacent commutator segment, where as in wave winding the finishing end of one coil is connected to the commutator segment which is distant apart and hence forms shape of wave. Aug 03, 2018 armature windings are mainly of two types lap winding and wave winding. The number of parallel path in a simplex wave windings are equal to a two. What is lap winding and wave winding difference between lap. The wave winding has only 2 parallel paths between brushes regardless of the number of poles in the machine. It is named lap winding because it doubles or laps back with its succeeding coils. Difference between lap winding and wave winding polytechnic hub. In large machines, the coils are performed and then inserted into the.
Example draw a developed diagram of a simple 2 layer lap. Lap winding simplex and duplex lap winding electrical study. Sep 09, 2018 wave winding is used for high voltage and low power machine. Pdf three phase ac double layer wave winding diagram, a. Lap winding definition of lap winding by merriamwebster. When two adjacent commutator bars make contact with a brush, p2 coils are shorted by the brush in the wave winding. Jul 15, 2015 this winding is called wave winding from the appearance wavy of the end connections. 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. The difference between these two is merely due to the end connections and commutator connections of the conductor.
A wave winding is an extended winding that makes progressive runs along the axis of the element upon which it is installed. In simplex winding, the number of parallel paths is equal to the pole, in duplex winding the pole is twice to. 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. Chapter 4principle of dc machineselectrical machines i shiraz. 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. To know how armature winding is done, it is essential to know the following terminologies. The difference between the two is merely due to the different arrangement of the end connections at the front or commutator end of armature. The energy conservation can take place in this winding by converting the mechanical energy into electrical energy, as well as the electrical energy into mechanical energy. There are 2 common types of armature windings first one is lap windings and the second one is wave winding. What is the difference between lap winding and wave. For this reason, the lap winding is called multiple or parallel winding. Because the winding progresses in one direction round the armature in a series of waves, it is known as wave winding.
The speed equqation and the terminal characteristics of a dc motor a terminal characteristic of a dc machine is a plot of its output torque versus speed. The armature conductor parallel paths are equals to the number of poles. This ppt shows the working principle of dc generator,types of armature winding its designing aspectni. Dc machine armature winding the dc armature windings are always of the closed continuous type of double layer lap or wave winding. This winding can be supplied with 3phase ac supply. The purpose in using one over the other has a lot to do with ease of manufacture and application. I have read some conflicting points about the lap winding. Lap winding wave winding lap winding is suitable for low voltage and high current generator. Dc machine armature winding hadi saadat the dc machine armature windings are always of the closed continuous type of doublelayer lap or wave winding.
The slot on stator core of the threephase motor winding carries stator winding. The wave winding is connected to the commutator segments at equipotential points so that this winding part can be employed as an equalizer for the lap winding. The number of parallel path in a simplex lap winding is equal to a number of poles b number of pole pairs c two d two times number of pole 2. In armature winding, the conversion of power takes places, i. The location of the winding depends upon the type of machine. The sole purposes of such type of windings are, a to increase the number of parallel paths enabling the armature current to increase i.
Armature windings may be of different types namely lap and wave, depending on which coil ends are terminated on specific commutator segments. It is suitable for low voltage and high electric current generators disadvantages of lap winding. 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. In wave windings, the number of parallel paths, a, is always two 2, and there may be two or more brush positions. The number of brushes required by this winding is always equal to 2. Armature windings lap and wave windings year 2 youtube.
This winding consist of a lap winding and wave winding placed on the same armature. Dec 22, 2006 a lap winding is essentially a closed coil disposed in a relatively small region of the circumference of the machine. Because wave windings have only two parallel paths, this winding is more suited for highvoltage, lowcurrent dc. For progressive winding plus sign will use and for retrogressive winding negative winding will be used. Mar 06, 2017 in this video, you will learn about armature windings, lap and wave type of armature windings, equalizer rings and dummy coils.
Lap winding provides more parallel paths, which means higher current and lower voltage. Lap winding is suitable for low voltage and high current generator. Armature winding is classified into two types namely lap winding as well as wave winding. Pdf winding diagrams are an integral part of electrical machine design.
Generally there are two types of armature winding in the dc machines. 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. The machine using wave winding does require dummy coils to provide the mechanical balance for the armature. In large machines, the coils are performed and then inserted into the armature slots. The basic thumb rule is that, lap winding is used where the machine requires low voltage but more current whereas wave winding is suited where current is low but voltage is high. This winding is necessarily required for large electric current application because it has more parallel paths.
Wave winding series winding of dc machine electronics. Difference between lap winding and wave winding table format. In this winding, the conductors per pair of poles are in series connection. After seeing this video your all doubt will be clear about this topic. Lap winding is the winding in which successive coils overlap each other. Difference of wave and lap winding only one difference this is simply the manner in which the coil ends of the two types are connected to the commutator. Dc machine types of windings electromagnetic induction.
Advantages of wave winding over lap winding electrical. Twolayer winding and multiplex winding electric equipment. In this case, there is a phase difference between the emfs. Wave winding is suitable for high voltage but a low current generator. 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.
Each coil consists of a number of turns of wire, each turn. The difference between these two is merely due to the end connections and commutator. Lap windings are used for low voltage and high current machines. What is the difference between lap winding and wave winding. The copper conductor may be of circular or rectangular crosssection. In this type of winding the coil side a b progresses forward around the armature. Objective questions on dc generator winding electrical. In this type of winding, the digit of parallel lanes among the pole is double the digit of poles. Above we discussed difference between lap winding and wave winding briefly.
Procedures are described for wave winding armatures to be used in dynamoelectric machines having four or more poles utilizing flier type armature winding machines. Wave winding definition of wave winding by merriamwebster. May 24, 2018 in this video, i describe about lap and wave winding in dc machine. Lap winding article about lap winding by the free dictionary. Dc machine types of windings free download as powerpoint presentation. Based on the frogleg winding configuration of simplex lap and duplex wave, the motor is designed with 4 poles and 22 slots, and the number of phases is set as 11. The main difference between lap and wave winding is the manner of connecting the armature winding coil end to the commutator segment. In this winding all the pole groups of the coils generating e. Aug 29, 2017 the current in the armature winding is known as the armature current. At some places it is said that there are two types of lap winding simplex and duplex. In this way, the winding progresses, passing successively under every npole and spole till it returns to a conductor a. The lap winding has many paths and hence it is used for the larger current applications.
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