To know the relationships between the different parameters related to the operation of three phase squirrel cage induction motors, such as the motor speed, torque, mechanical power, active power, reactive power, power factor, and efficiency. An induction motor is an electrical motor whic does not require external excitation of the rotor. Thus from the working principle of three phase induction motor, it may be observed that the rotor speed should not reach the synchronous speed produced by the stator. Normally, we use the motors in industrial drives because they are rugged, reliable and economical.
Menzel 3 phase squirrel cage induction motors are robust, efficient and durable. Third international conference on advances in control and optimization of dynamical systems march 15, 2014. Windings are such placed that they are electrically and mechanically 120 o apart from in space. Design of a threephase squirrelcage induction motor based on efficiency maximization using fem software mucet2008paper no here. These windings are either star connected or in delta connected.
Firstly, i am going to tell you about the structure of squirrel cage induction motor. In a wound rotor motor, the poles are actual windings, in a squirrel cage rotor there arent windings as such, but conductive bars, usually copper with a shorting ring on each e. L direct on line starte it is simple and cheap starter for a 3 phase induction motor. The parameters of the motor are listed in table 10. They are built to cope with the toughest conditions, and reliably ensure the durable availability of your industrial facilities.
The induction motor is started by itself that we know. A squirrel cage induction motor therefore draws a very high starting. The sinusoidal stator phase currents fed in the stator coils create a magnetic field. A 3 phase ac induction motor photoed by hordu motor. More files in the power electronics control community.
Create scripts with code, output, and formatted text in a single executable document. Some singlephase induction motors are also called squirrel cage motors because of the rotors similarity to a circular animal exercise wheel. In particular, the squirrel cage induction motors are widely used electric motor in home and industrial. Design of a three phase squirrel cage induction motor for. In this paper new equations are derived for the 3phase squirrelcage induction motor with space harmonics which can be used to compute dynamic characteris. Construction of squirrel cage induction motor explained. Explain starting methods of 3 phase induction motor. The single phase induction motor resembles, three phase, squirrel cage motor except that, single phase induction motor has no starting torque and some special arrangement have to be made to make it as self starting. Squirrel cage induction motor and wound rotor induction motor.
Since then, we have continued to comply many high ef. Designing of three phase squirrel cage induction motor for. The induction motor due to its characteristics forms the most common choice of industrial applications worldwide. The stator has windings that produce a magnetic field, and windings on the rotor cut this field and induce a current in the rotor windings. Three phase squirrel cage induction motors in flameproof enclosure type asa frame size 63 315 ct1 2006 page 4 32 revision 3 the motors are suitable for three phase mains power supply with 400 v rated line voltage and for 50 hz rated frequency the overtemperature of the windings for the rated duty, at the rated parameters is in. Former is cheaper and broadly used as it requires less maintenance than later one. Starting of squirrel cage induction motors485 an induction motor can be regarded as a transformer with a small air gap in the magnetic circuit. Pdf optimization of the electromagnetic characteristics. A squirrel cage rotor is the rotating part of the common squirrel cage induction motor. An induction motor s rotor can be either wound type or squirrel cage type. Horizontal three phase induction electric motors squirrel cage rotor dear customer, thank you for acquiring a weg motor. In this type of three phase induction motor the rotor is wound for the same number of. Induction motor types based on the construction of the rotor, induction motors are broadly classified in two categories.
The analysis of the 3phase squirrelcage induction motor with. Closedform analysis of squirrelcage induction motors with. Oct 09, 2016 a 3 phase induction motor has two types based on the rotor construction, named as. Two digital multimeters and fluke power quality meter with banana cables from the. Design of a three phase squirrel cage induction motor for electric propulsion. If the speeds become equal, there would be no such relative speed, so no emf induced in the rotor, and no current would be flowing, and therefore no torque would be generated. Working principle of 3 phase squirrel cage induction motor. You should also make a dc measurement of stator winding linetoline resistance. The three phase induction motors are simple in construction, rugged, low cost and easy to maintain. Troubleshooting the problems 1, 2 as mentioned above, open the motor to find out the breakage and weld it.
Pdf three phase squirrel cage induction motor, conctruction. The starting current is very large, normally 6 to 8 times the rated current. Conference paper pdf available august 2009 with 8,072 reads. The general construction of the slots in the rotor is such that the rotor bars. This method is normally limited to smaller cage induction motors, because starting current can be as high as eight times the full load current of the motor. Frame size 180m and above, 380660v50hz is standard. Uses soft magnet rotor that is magnetized by the application of current in the stator coils 3. Cage induction machines institut fur elektrische energiewandlung. Various applications toshiba motor is used for various applications. Parida department of electrical engineering national institute of technology, silchar,assam, india email. The difference in speed between rotor, the synchronous speed and the rotating. In this work, with the use of fem analysis, a specific induction motor is optimized under three different criteria.
To measure the inrush current when the motor starts. Types of three phase induction motor squirrel cage induction motor. Threephase induction motor squirrel cage rotor customer. Induction motors are generally two types as we see in the previous article. There is uniform air gap between stator and rotor but no electrical connection between them. The singlephase induction motor is much the same in construction as the threephase motor. It directly connects the contacts of the motor to the full supply voltage. The three phase induction motor is the extensively used for various kinds of industrial drives.
Single phase induction motors are used extensively for smaller loads, such as household appliances like fans. At us american market 2pole and 4pole squirrelcage induction motors with. Prior to power electronics and advanced ac motor control being available dc motors were favourable solely from a technical and control point of view. A 3 phase squirrel cage induction motor is a type of three phase induction motor which functions based on the principle of electromagnetism. In this work a conventional three phase squirrel cage type induction motor with specifications 10 hp, 415v, stardelta connected and 4 poles is chosen for comparison with our motor, which is designed for good efficiency. Pdf squirrel cage induction motor design and the effect of. The two typed of rotor constructions which are used for induction motors are squirrel cage rotor and slip ring wound rotor. A simple explanation of how a 3 phase induction motor works. The rotor is same as that employed in 3 phase squirrel cage induction motor. Since electric motors play an important role in comfort and wellbeing, they need to be.
Three phase squirrel cage induction motors are widely used in industrial drives because they are rugged, reliable and economical. The bars forming the conductors along the rotor axis are connected by a thick metal ring at the ends, resulting in a short circuit as shown in figure 1. Low and high voltage three phase induction motors m line squirrel cage rotor horizontal date. The design of y2 series induction motor absorbed the advanced technology of electric motors around the world. Yahya shakweh, in power electronics handbook fourth edition, 2018. The magnet is spun by a 3 phase ac motor with no rotor voltage 4. Unless otherwise the name plate specifies, all the squirrel cage, 3 phase, induction motors lower than v and smaller than 315 frame size can safely run continuously at the speed in the table below. Squirrel cage induction motor the engineering projects. In this chapter, we shall focus our attention on the construction. An induction motor can therefore be made without electrical connections to the rotor. The three phase squirrel cage induction motors are classified into 6 different standard types based on their electrical characteristics. Nov 27, 2019 thus from the working principle of three phase induction motor, it may be observed that the rotor speed should not reach the synchronous speed produced by the stator. Kanpur, india design of a three phase squirrel cage induction motor for electric propulsion system ravi prakash,mohammad junaidakhtar, r. Ml three phase squirrel cage induction motor supply of three phase squirrel cage induction motor for uranium corporation of indi, due date.
In squirrel cage induction motor, there is a 3 phase winding on the stator slots. Depending upon the type of rotor construction used the three phase induction motor are. A wound rotor or slip ring motor has a 3phase winding, similar to the stator. A complete lumped equivalent circuit of threephase squirrelcage. Pdf partwinding starting improvement of threephase squirrel. Induction motor totallyenclosed fancooled nema standard epact three phase induction motors sdesign versatility teco totally enclosed fan cooled squirrel cage induction motors are designed, manufactured and tested to meet or exceed the latest nema, ieee, csa and. We also discuss the construction of a three phase motor including its stator and. This induces an electric field in a coil or squirrel cage to drive a rotor. The slip ring motor has very little application in industries. Record all nameplate information for the induction motor.
An induction motor can be, squirrel cage induction motor. Energy efficient induction motors three phase squirrel cage. Load tests on a three phase induction motor and measurement of the inrush current objectives. Advantages of 3 phase induction motor generally easy to build and cheaper than corresponding dc or synchronous motors induction motor is robust. Operation manual threephase squirrel cage induction. Low voltage threephase squirrelcage induction motor. An induction motor can be squirrel cage motor or a wound rotor motor. A wide variety of three phase squirrel cage induction motor options are available to you. This rotating magnetic field has a speed which is known as the synchronous speed this rotating magnetic field induces the voltage in rotor bars and hence shortcircuit currents start flowing in the rotor bars.
Safe running speed for the squirrel cage induction motors. In this work a conventional three phase squirrel cage type induction motor with specifications 10 hp, 415v, stardelta connected and 4 poles is chosen for comparison with our motor, which is. When a 3 phase supply is given to the stator winding it sets up a rotating magnetic field in space. It is desired to install a 3 phase cage induction motor restricting the maximum line current drawn from a 400 v 3 phase supply to 120 a. Partwinding starting improvement of threephase squirrelcage induction motor. Since 1927, users around the world have been able to rely on highquality 3 phase squirrel cage induction motors made by menzel. Three phase squirrel cage induction motors are widely used as industrial drives because they are selfstarting, reliable and economical. Squirrel cage wound rotor with slip rings the rotating magnetic field the basic idea of an electric motor is to generate two magnetic fields. Conference paper pdf available august 2009 with 8,082 reads.
A 3 phase induction motor uses current delivered in three phases in a sequence into the coils of a stator to create a rotating magnetic field. Feb 09, 2018 mainly because they are cheap, robust, selfstarting. The stator construction is the same in both motors. Starting method for induction motors a 3 phase induction motor is theoretically self starting. Squirrel cage motor almost 90% of induction motors are squirrel cage motors. Lowvoltage three phase squirrel cage induction motors for general purpose order this document comes with our free notification service, good for the life of the document. Mathematical modeling and speed torque analysis of three phase squirrel cage induction motor using matlab simulink for electrical machines laboratory now all the measured values in no load test of 3o squirrel cage induction motor is tabulated in table 3. To obtain the load performance characteristics of a three phase squirrel cage induction motor. Transdesign of a three phase squirrel cage induction motor. You will be using the labvolt trainer model no 8020. What is squirrel cage induction speed of the motor and viceversa. In this case, it is better to choose a induction motor with a great capacity or reduce the load.
This paper describes a generalized simulation model of the threephase induction motor using the simulink software package of matlab. One single phase wattmeter plus miscellaneous apparatus as needed. Ac induction motors are also the most common motors used in main powered home appliances. Parida department of electrical engineering national institute of technology, silchar. Three phase induction motor specifications is 325 60034 1. Three phase induction motor specifications is 325 60034. In this example the entire motor winding is represented. In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made available on a noncommercial basis, as it is the right of all humans to know and speak the laws that govern them. Introduction types of electrical machines types of 3 ph induction motor basic principle working principle compnents of induction motor application comparision between 1ph i. Three phase squirrel cage induction motor supply o tender. To know what motor efficiency and highefficiency motors are. For squirrel cage rotor it consists of copper bars.
Y2 series three phase induction motor i asynchronous motor y2 series three phase asynchronous motor is a kind of totally enclosed fancooled tefc squirrel cage induction motor. Pdf modelling of the threephase induction motor using simulink. The model is based on twoaxis theory of revolving frame. Motors what we will be working on today is the disassembly and assembly of an a. Construction of three phase induction motor electrical4u. This paper presents the design of threephase induction motor im for high speed with torque speed curve. Three phase induction motors w60 line squirrel cage rotor.
Squirrel cage induction motor is used in lathes, drilling machine, fan, blower printing machines etc. An induction motors rotor can be either wound type or squirrel cage type. When the 3 phase supply is provided to the stator, a magnetic field is produced which rotates the rotor and motor starts. Siemens squirrel cage induction standard threephase motors pdf. Flexible 5 ratings correspondence 220380415v50hz,220440v60hz is standard. A squirrelcage rotor is the rotating part of the common squirrel cage induction motor. Disassembly and assembly of motors three phase induction motor. It is very commonly used in industries because it is very cheap, robust, efficient, and reliable. Why are threephase squirrelcage induction motors commonly. Kirloskar brothers limited an overview of manufacturing. Weg threephaseinductionmotors tline squirrel cage rotor12364818manualenglish. In operation, the nonrotating stator winding is connected to an alternating current power source. This is a product developed with levels of quality and efficiency that ensure an excellent performance. As discussed in chapter 16, the squirrel cage comprises the bars and.
The new iec 60034301 defines worldwide the following efficiency classes of singlespeed three phase, cage induction motors in the 0,12 kw power range. At the final stage of the design of a threephase induction motor and. Design of a three phase squirrel cage induction motor for electric. Low and high voltage three phase induction motors m line. Advantages of three phase squirrel cage induction motor. This paper describes a generalized simulation model of the three phase induction motor using the simulink software package of matlab. Set up and connections three phase induction motor noload and fullload operation three phase induction motor operation characteristics three phase induction motor direction of rotation p rocedure high voltages. A 3 phase induction motor has two types based on the rotor construction, named as.
Observation of no load test i o amp v o volts pin watts stator cu loss. The threephase induction motor is the extensively used for various kinds of industrial drives. Slip ring rotor or wound rotor or phase wound rotor. Pdf design of a threephase squirrelcage induction motor. It consists of a cylinder of steel laminations, with aluminum or copper conductors embedded in its surface. A 1 phase induction motor is similar to a 3 phase squirrel cage induction motor in physical appearance. Three phase induction motors an electric motor is a device which converts electrical energy into. Three phase induction motor squirrel cage rotor customer. An843, speed control of 3phase induction motor using pic18 mcus.