Induction motor seminar ppt, pdf report study mafia. A 3 phase induction motor can be used for different applications with various speed and load requirements. The rotor has salient poles and a cage so that it starts like an induction motor, and runs like a synchronous motor. Record all nameplate information for the induction motor. An induction motor can be defined as the ac electric motor device in which a power source fed by the alternating current with the. How an induction motor works by equations and physics introduction. An induction motor can therefore be made without electrical connections to the rotor. Nov 03, 2019 an induction motor also known as an asynchronous motor is a commonly used ac electric motor. Induction motors are the most commonly used motors in many applications. Induction machines are by far the most common type of motor used in industrial, commercial or residential settings. May 19, 2018 there are mainly two types of induction motor on the basis of power supply, single phase induction motor and three phase induction motor. 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. The rotor will constantly be turning to align its magnetic field with that of the stator field. An induction motor is also called asynchronous motor as it runs at a speed other than the synchronous speed.
Free download induction motor seminar ppt, pdf report. Three phase induction motor for industrial general purpose toshiba. An induction motor also known as an asynchronous motor is a commonly used ac electric motor. As mentioned above that, due to the rotating magnetic field of the stator, the induction motor becomes self starting.
In an induction motor, the electric current in the rotor needed to produce torque is obtained via electromagnetic induction. Introduction the threephase induction motor is the extensively used for various kinds of industrial drives. Dec 19, 2015 single phase induction motors are used primarily for domestic and lightindustrial applications where threephase supply is generally not available. May 22, 2017 types induction motor single phase induction motor 1.
Types induction motor single phase induction motor 1. There are two types of induction motors, one with wound type rotor, also called slipring motor and another one with squirrel. The motor is mounted in a test rig that allows one to control the torque applied to the motor shaft and to measure both rpm and torque. Hence, an utmost care should be exercised in selection of most appropriate type of motor. The design of y2 series induction motor absorbed the advanced. Like any other electrical motor, induction motors have two main parts. Slip ring induction motor is made up from wound rotor and squirrel cage induction motor is made up from the squirrel cage rotor. In my last article, we have discussed squirrel cage induction motor which is a type of 3 phase induction motor. The design of y2 series induction motor absorbed the advanced technology of electric motors around the world. For reason of economy, most houses, offices and also rural areas are supplied with single phase a. These motors are suitable for all general applications where an open machine is not applicable due to severe environments such as excessive dirt, dust andor moisture. Construction of three phase induction motor electrical4u. It was formerly used as a traction motor for electric trains e.
The rotor of an induction motor can be a squirrel cage rotor or wound. There have been conflicting opinions and claims regarding the effect of replacing a standardefficiency motor with an energyefficient motor on a centrifugal type. Wound rotor induction motor the engineering projects. This will link and cut the rotor conductors which in turn will induce a current in the rotor conductors and. But the rotor construction differs with respect to the type. Induction motors greater strength, longer life for various application. How an induction motor works by equations and physics. Sr class cp and sr class sl electric multiple units but has been superseded by other types of motors.
In general, the induction motor is cheaper and easier to maintain compared to other alternatives. There have been conflicting opinions and claims regarding the effect of replacing a standardefficiency motor with an energyefficient motor on a centrifugal type load. Synchronous speed means the speed of the rotating magnetic field in the stator. These are also called as asynchronous motors, because an induction motor always runs at a speed lower than synchronous speed. Diagnostics of rotor and stator problems in industrial. Induction motor theory jerry bednarczyk, pe course content introduction the ac induction motor is well suited to applications requiring constant speed operation. An induction motor s speed is always less than synchronous speed and it drops off as load increases. In an induction motor, the electric current in the. There are two basic reasons for the use of singlephase motors rather than 3phase motors. There basically 2 types of induction motor depending upon the type. The basic idea of an electric motor is to generate two magnetic fields. Induction motors installation operation generators maintenance. Understanding motor nameplate information nema vs iec standards. As their name suggests, 1 phase ac power supply is extended to single phase induction motor while three phase induction motor is connected to 3 phase ac power supply.
The threephase induction motor is the extensively used for various kinds of industrial drives. Induction motor totallyenclosed fancooled nema standard epact three phase induction motors sdesign versatility teco totally enclosed fan cooled squirrelcage. Telecommunication engineering, southwest jiaotong university, china, 2005 thesis submitted for the degree of masters of engineering science in school of electrical and electronic engineering the university of adelaide, australia august 2010. There are two types of induction motors, one with wound type rotor, also called slipring motor and another one with squirrelcage rotor. The stator of an induction motor consists of 3phase windings, which when connected to a 3phase supply creates a rotating magnetic field. Stator of a large induction motor different types of electrical motors. Selection of induction motors for industrial applications. Diagnostics of rotor and stator problems in industrial induction motors by fang duan b. Nov 27, 2019 like any other type of electrical motor induction motor, a 3 phase induction motor is constructed from two main parts, namely the rotor and stator. In my last article, we have discussed squirrel cage induction motor which is a type of 3 phase induction motor today, i am going to tell you about a wound rotor induction motor, which is also a type. There are mainly two types of induction motor on the basis of power supply, single phase induction motor and three phase induction motor. Motor type motor enclosure cg or ncg open drip proof or weather protected type i. Induction machines are considered relatively reliable and robust due to their simple design and welldeveloped manufacturing technology.
Uses soft magnet rotor that is magnetized by the application of current in the stator coils 3. Our ac induction motors meet all requirements of specific application in several different sizes and torque ranges. A stator winding is placed in the stator of induction motor and the three phase supply is given to it. Selection of induction motors for industrial applications part 1 photo credit. The motor type designation consists of a basic letter or letters indicating the motor enclosure type. Types of electric motors electric motors dc motors other motors h ac motors s unt motor separately excited induction motor stepper motor motor brushlessdc motor series motor hysteresis motor permanent magnet dc pmdc synchronous motor reluctance motor compounded motor universal motor. An electrical motor is a device that has brought about one of the biggest advancements in the fields of engineering and technology ever since the invention. Teco totally enclosed fan cooled squirrelcage induction motors are designed, manufactured and tested to meet or exceed the latest nema, ieee, csa and other international standards. Telecommunication engineering, southwest jiaotong university, china, 2005 thesis. These motors are selfstarting and use no capacitor, start winding, centrifugal switch or other starting device.
Advantages of 3 phase induction motor generally easy to build and cheaper than corresponding dc or synchronous motors induction motor is robust. The induction motor is made up of the stator, or stationary windings, and the rotor. When the 3 phase stator windings are fed by 3 phase supply, a magnetic flux of constant magnitude which is rotating at synchronous speed is set up. Understanding motor nameplate information nema vs iec.
When the 3 phase stator windings are fed by 3 phase supply, a magnetic flux. But the rotor construction differs with respect to the type of motor. Oct 10, 2016 hi friends, i hope you are fine and having fun. This type of motor is not used for drives which require more than 1 kw because of the low starting torque. You should also make a dc measurement of stator winding linetoline resistance using a dmm. Induction motors generators 1 table of contents page page table of contents 1 operation 10 safety. For example, for 1800 rpm synchronous speed, an induction motor might have a fullload speed of 1748 rpm. Y2 series three phase asynchronous motor is a kind of totally enclosed fancooled tefc squirrelcage induction motor. What do all those things on an ac motor nameplate mean.
Ac induction motors are also the most common motors used in main powered home appliances. Induction motors are the commonest type of motor and account for a very large proportion of heavy duty motors. The reversal of the motor is possible at the standstill condition only. Scroll to the bottom to watch the youtube tutorial on this article the induction motor is the most common type.
The construction of stator of the induction motor is almost the same as other motors. This final thesis will mostly be dedicated to induction motors but also to synchronous permanent magnet and reluctance motors. Today, i am going to tell you about a wound rotor induction motor, which is also a type of 3 phase induction motor. This paper aims to represent routine test performing in three phase induction motor. Induction motor is one of the most important motor used in industrial applications. Singlephase induction motor threephase induction motor singlephase induction motor there are probably more singlephase ac induction motors in use today than the total of all the other types put together. Dear customer, in pursuance of the culture of continuous improvement towards customer satisfaction, we have now.
Induction motor testing and evaluation summary as energy costs rise, more emphasis is being placed on determining the health of large inductive motors. Y2 series 3phase induction motors are characterized with high efficiency and. On standard induction motors, the fullload speed is typically 96% to 99% of the noload speed. Scroll to the bottom to watch the youtube tutorial on this article the induction motor is the most common type of electrical motor used in industry, and its used in pretty much everything, from elevators. In an induction motor, the electric current in the rotor needed to produce torque is obtained via electromagnetic induction from the rotating magnetic field of the stator winding. Induction motor basics, single phase and three phase. A repulsion motor is a type of electric motor which runs on alternating current ac. Sizes vary from fractional horsepower to several thousand horsepower used for such applications as dieselelectric locomotives. The block uses the threephase input voltages to regulate the individual phase currents, allowing control of the motor torque or speed.
The 3phase set of currents, each of equal magnitude and with a phase. How does a threephase alternating current induction motor work. A repulsioninduction motor is a form of repulsion motor that has a squirrelcage winding in the rotor in addition to the repulsion motor winding. The shaded pole induction motor is simply a selfstarting singlephase induction motor whose one of the pole is shaded by the copper ring. An induction motor or asynchronous motor is a type of alternating current motor where power is supplied to rotor by means of electromagnetic induction. S pg offers broad ranges of ac induction motor products with greater strength, longer life for various application. Find out here with this article on induction motors. Induction motor works on the principle of induction where electromagnetic field is induced into the rotor when rotating magnetic field of stator cuts the stationary rotor. Starting method for induction motors a 3phase induction motor is theoretically self starting. By far the most commonly used ac motor is the induction motor. This type of motors are cheap and are suitable for easily starting loads where the frequency of starting is limited. An electric motor rotates because of magnetic force exerted between a stationary electromagnet called the stator and rotating electromagnet called the rotor.
Single phase induction motors are used primarily for domestic and lightindustrial applications where threephase supply is generally not available. The stator of an induction motor consists of 3phase windings, which when connected to a 3. The air is exhausted out of the motor through the openings type designations the motor type designation consists of a basic letter or letters indicating the motor enclosure type to which other letters may be added denoting modifications. A motor of this type may have either a constantspeed see mg11. Induction machines are considered relatively reliable and robust due to their simple design and. Threephase ac induction motors are widely used in industrial and commercial applications. An induction motors rotor can be either wound type or squirrelcage type. These are of two types, squirrel cage and slip ring motors. It is logical that the least expensive, lowest maintenance type. It is logical that the least expensive, lowest maintenance type motor should be used most often. The rotor of an induction motor can be a squirrel cage rotor or wound type. Ac induction motors are also the most common motors used in main powered home.
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