Design of a three phase squirrel cage induction motor for. The design of y2 series induction motor absorbed the advanced technology of electric motors around the world. A stator winding is placed in the stator of induction motor and the three phase supply is given to it. Easy to predict motor performance for a three phase design, notoriously difficult for a single phase design. Still a motor of choice for a new 400 hz aerospace applications. Various applications toshiba motor is used for various applications. Effect of changing rotor resistance on the torquespeed characteristic of an induction motor. Menzel 3 phase squirrel cage induction motors are robust, efficient and durable. For a fullload operating slip of 3 per cent, the speed will then be 1 s60 fp, or 1455 rpm. Know about the different winding slots, lamination of the stator and its construction.
Epact three phase induction motors sdesign versatility teco totally enclosed fan cooled squirrelcage induction motors are designed, manufactured and tested to meet or exceed the latest nema, ieee, csa and. Motors employing this type of rotor are variously known as phase wound motors or wound motors or as slipring motors. Select number of stator slots and suitable three phase winding layout experience. Also appreciate the rugged construction of squirrel cage rotor and know the spectacular reasons for the skewed arrangements of the rotor conductors. Investigation of broken rotor bar faults in threephase.
As its name indicates stator is a stationary part of induction motor. An induction motor is similar to a polyphase transformer whose secondary is short circuited. Design of a threephase squirrelcage induction motor based on efficiency maximization using fem software mucet2008paper no here. It is desired to install a 3phase cage induction motor restricting the maximum line current drawn from a 400 v 3phase supply to 120 a. A threephase, squirrelcage induction motor is fed by a voltagesource inverter. The rotor of a threephase squirrel cage induction motor consists of a set of noninsulated bars that are interconnected by shortcircuit rings. Introduction the squirrelcage induction motor is mounted to the dynamometer. How are squirrel cage induction motors constructed. Designing of three phase squirrel cage induction motor for. The three phase induction motor is the most widely used electrical motor.
How an induction motor works by equations and physics. Third international conference on advances in control and optimization of dynamical systems march 15, 2014. A wide variety of three phase squirrel cage induction motor options are available to you, such as threephase, singlephase. Squirrel cage rotor almost 90 per cent of induction motors are squirrel cage type. Typical ac induction motor construction and performance. A 3 phase induction motor has two types based on the rotor construction, named as.
An induction motors rotor can be either wound type or squirrelcage type. Design of a threephase squirrelcage induction motor based on efficiency maximization using fem software mucet2008paper no here conference paper pdf available march 2008 with 2,981 reads. The reason for the name squirrel cage is because of the type of rotor used in these motors. In particular, the squirrelcage induction motors are widely used electric motor in home and industrial. The new iec 60034301 defines worldwide the following efficiency classes of singlespeed threephase, cage induction motors in the 0,12 kw power range. Almost 95% of the induction motors used is of squirrel cage type. Good performance, such as high safety, energy saving, compact design, low noise, little vibration, big breakaway torque, reliable operation, stable running and convenient. Design, development of six phase squirrel cage induction motor. Instead the rotor is wound with shorted turns in which the environmental field induces a current.
It consists of a cylinder of steel laminations, with aluminum or copper conductors embedded in its surface. Torquespeed characteristics of three phase squirrel cage. High phase number drives possess several advantages over conventional three phase drives such as high torque, higher reliability and increased power. Key wordsdesign optimization, induction motor, genetic algorithm. The stator is supplied by a balanced 3phase ac power. Motors employing this type of rotor are known as squirrel cage inductionmotors. Kanpur, india design of a three phase squirrel cage induction motor for electric propulsion system ravi prakash,mohammad junaidakhtar, r. Unlike in dc motors, large current at starting is due to the absence of back emf. Now let us discuss in detail, the most common form of induction motor, the squirrel cage induction motor. Speed control of three phase squirrel cage induction motor.
Request pdf design of a three phase squirrel cage induction motor for electric propulsion system this paper presents the design of. They are built to cope with the toughest conditions, and reliably ensure the durable availability of your industrial facilities. A squirrelcage rotor is the rotating part of the common squirrelcage induction motor. Kirloskar brothers limited an overview of manufacturing. It also has two 3phase diode bridges for producing the dc output. The most popular type is the 3phase, squirrelcage ac induction motor. The rotor is not power supplied externally and the currents that flow through it are induced. Design with too high safety margins yields too high noload losses. Squirrel cage wound rotor with slip rings the rotating magnetic field the basic idea of an electric motor is to generate two magnetic fields. The implementation is done using a rectifier and an inverter, where the pwm triggering pulses were generated by using pic micro controller for switching the igbts of the inverter. Pdf squirrel cage induction motor design and the effect of. Manufacturing cost low for mass production, when fully tooled. The user has to input the fullload nameplate ratings and this package will generate the design sheet, considering the design constraints at hand.
The same basic design is used for both singlephase and threephase motors over a. Construction of three phase induction motor electrical4u. Frame size 180m and above, 380660v50hz is standard. Threephase induction 208v motor with matlab revised. Its synchronous speed with a 50 hz supply is therefore 60 fp, or 1500 rpm. It is a maintenancefree, less noisy and efficient motor.
Squirrel cage induction motor the engineering projects. The iec 60034301 is part of an effort to unify motor testing standards, efficiency requirements and product. Pdf design of a threephase squirrelcage induction motor. 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. When a 3 phase supply is given to the stator winding it sets up a rotating magnetic field in space. The main purpose of designing an induction motor is to obtain the complete physical dimensions of all the parts of the machine as mentioned below to satisfy the customer specifications. But the rotor construction differs with respect to the type of motor. In operation, the nonrotating stator winding is connected to an alternating current power source. Almost 80% of the mechanical power used by industries is provided by three phase induction motors because of its simple and rugged construction, low cost, good operating characteristics, the absence of commutator and good speed regulation. Know about the most popular and almost unbreakable construction of squirrel cage induction motor.
Record all nameplate information for the induction motor. Flexible 5 ratings correspondence 220380415v50hz,220440v60hz is standard. Variable voltage variable frequency vf control theory an induction motor compared to a dc motor has some major advantages such as absence of brushes, commutator segments, rugged construction, being cheap, lesser maintenance requirements and smaller. At us american market 2pole and 4pole squirrelcage induction motors with. In this work a conventional three phase squirrelcage 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.
Firstly, i am going to tell you about the structure of squirrel cage induction motor. Threephase induction motor squirrel cage rotor customer. Former is cheaper and broadly used as it requires less maintenance than later one. Three phase squirrel cage induction motor drive analysis using labview free download as pdf file. Three phase squirrelcage type induction motor having specifications 30 hp,380v, star.
Since 1927, users around the world have been able to rely on highquality 3 phase squirrel cage induction motors made by menzel. The stator winding is assumed to be yconnected with the access to the phase terminals. Design of a three phase squirrel cage induction motor for electric. One singlephase wattmeter plus miscellaneous apparatus as needed. This interactive package has a collection of modules, that performs individual design steps for a squirrel cage induction motor.
Thus, at normal supply voltage, like in transformers, the initial current taken by the primary is very large for a short while. This motor should be mounted on the motor bench, wherein the motor. You should also make a dc measurement of stator winding linetoline resistance. Normally, we use the motors in industrial drives because they are rugged, reliable and economical. The most popular squirrel cage induction motor is of a 4pole design.
Working principle of 3 phase squirrel cage induction motor. Simple operation and robust design have made the threephase squirrelcage induction motor. This paper presents the design of threephase induction motor im for high speed with torque speed curve suitable for vehicle propulsion applications. Slip ring induction motor is made up from wound rotor and squirrel cage induction motor is made up from the squirrel cage rotor. Construction of squirrel cage induction motor explained. A singlephase induction m otor is not self starting as 3phase squirrel ca ge induction motor but requires some starting means. In three phase induction motor, the power is transferred from stator to. What characterizes an induction motor is the fact that only the stator is connected to the power supply. The induction motor is operated at variable frequency and constant rated flux that is, e f constant and has the following nameplate data. The threephase induction motor is the easiest motor of this type to understand so these notes start with that type. The construction of stator of the induction motor is almost the same as other motors. An induction motor or asynchronous motor is an ac electric motor in which the electric current in the rotor needed to produce torque is obtained by electromagnetic induction from the magnetic field of the stator winding. Three phase induction motors used in explosive atmospheres w60 line squirrel cage rotor horizontal date. Unlike a 3phase induction motor, a singlephase induction motor is not self starting but requires some starting means.
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. If an induction motor is directly switched on from the supply, it takes 5 to 7 times its full. Stator is made up of number of stampings in which different slots are. That current in turn produces a field that interacts with the environment to drive the rotor.
Among the different multiphase induction motor drives being researched, following. Y2 series 3phase induction motors are characterized with. Here, a multiphase system is a system with more than three stator phases. Speed control of three phase squirrel cage induction motor using vf method is implemented. Cage induction machines institut fur elektrische energiewandlung. Squirrel cage induction motor and wound rotor induction motor. Parida department of electrical engineering national institute of technology, silchar,assam, india email. Phase sequence indicator can be classified into two ways. Pdf three phase squirrel cage induction motor, conctruction. Three phase induction motor specifications is 325 60034 1.
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