Mechanical methods are not very practical methods that is why the motor is started temporarily by converting it into a two-phase motor. Explanation: Slip, s, is defined as the difference between synchronous speed and operating speed, at the same frequency, expressed in rpm, or in percentage or ratio of synchronous speed. Three phase induction motors are further divided into two types; Squirrel Cage Induction Motor and Wound Rotor Induction Motor based on the construction of rotor. 2. The principle of rotating type phase sequence indicator is like that phase motor. 3 ph induction motor ppt 1. Starting of 3-Phase Induction Motors The induction motor is fundamentally a transformer in which the stator is the primary and the rotor is short-circuited secondary. Supplied from a three-phase AC line, induction motors are simple, robust, and inexpensive. These are of two types, squirrel cage and slip ring motors. Outlines: Introduction Types of Electrical Machines Types of 3-Ph induction motor Basic Principle Working Principle Compnents of induction motor Application Comparision between 1 … Rotor of three phase induction motor consists of a cylindrical laminated core with parallel slots that can carry conductors. Phase wound or wound rotors. 7 2F1 2F2 W TR L 3. Generally, two types of induction motors are used in our industry such as wound rotor and squirrel cage rotor, but their faults are almost same. THREE PHASE INDUCTION MOTOR AND PERFORMANCE TARGETS The basic considerations for an induction motor design includes magnetic loading, the peak of fundamental component of radial flux density in the air-gap of the motor, core length, air-gap length, number of poles, number of stator and rotor slots, stator tooth width and slot depth, thermal resistance at each part of … This chapter gives a general characterization of induction motors and their use in AC drive systems. Consider the working of a motor for a better understanding of these indicators. Since the rotor impedance is low, the rotor current is excessively large. Types of single phase induction motors. Regenerative Braking. Initial Data . Single phase induction motors are used in a wide range of applications where only single phase supply is available. Many single-phase motors having two windings can be viewed as two-phase motors, since a capacitor is used to generate a second power phase 90° from the single-phase supply and feeds it to the second motor winding. The braking of an induction motor is explained below in details. Synchronous Motors IV. First of all, I am going to discuss about the construction of 3 Phase Induction Motor and then I will throw some light on its working. Based on type of phase supply Three phase induction motor (self starting in nature) Single phase induction motor (not self starting) Other Squirrel-cage induction motor Slip ring induction motor. (e) Storage maintenance is to be documented for warranty data. The video highlights details regarding the Construction of Three Phase Induction Motor. These are manufactured in fractional kilowatt range to meet the requirements of various applications such as ceiling fans, food mixers, refrigerators, vacuum cleaners, portable drills, hair driers, etc. 1.5 WORKING OF SINGLE-PHASE INDUCTION MOTOR: A single phase induction motor is inherently not self-staring can be shown easily. There are many methods in use to start 3-phase induction motors. One Phase Sequence Indicator . A 3 phase squirrel cage induction motor is a type of three phase induction motor which functions based on the principle of electromagnetism.It is called a ‘squirrel cage’ motor because the rotor inside of it – known as a ‘squirrel cage rotor’ – looks like a squirrel cage. Various applications Toshiba motor is used for various applications. I Introduction to AC Machine II. The input power of the induction motor drive is given by the formula shown below. The two types of three-phase induction motors are- squirrel cage and slip ring motors. Industrial Fan & Blower Conveyor VF-S15 VF-AS3 Mixer Slicer 3. What is the relationship between the supply frequency number of poles and sycnchronous speed? The motors that use this type of rotor are known as Slip-ring rotors. Three-phase AC induction motors have various uses in commercial and industrial applications. 2) Provide overload and no-voltage protection. One dynamometer with torque controller . Therefore, 3-phase induction motors employ a starting method not to provide a starting torque at the rotor, but because of the following reasons; 1) Reduce heavy starting currents and prevent motor from overheating. Single-phase induction motors are classified according to the auxiliary means used to start the motor. Squirrel cage rotor: Squirrel cage motor works on the principle of Electromagnetism. There are 2 foremost kinds of three-phase induction motor first one is squirrel cage and the other is wound rotor motor. A three-phase induction motor is a type of machine which mostly used in industries. Single-Phase Induction Motor – Construction, Operation & Types of 1-Phase Induction Motors. What is Squirrel Cage Induction Motor. One 208 Volt, 0.75 HP, 3-phase induction motor . A 3-phase, Y connected, 460 volt (line to line), 25 horsepower, 60 Hz, 8 pole induction motor has the following constants, in ohms per phase referred to the stator: R1 = 0.342 X1 = 0.561 Z1 = 0.342 + j0.561 R2 = 0.164 X2 = 0.265 Prof. AJAY B. BALAR Darshan Institute of Engineering & Technology, Rajkot (Gujarat) 2. Induction motors are most commonly run on single-phase or three-phase power, but two-phase motors exist; in theory, induction motors can have any number of phases. It works on the principle of Induction Motor. One single-phase wattmeter plus miscellaneous apparatus as needed . The single-phase motors are more preferred over a three-phase induction motor for domestic, commercial applications. An induction motor can further be of two types: Single Phase Induction Motor and Three Phase Induction Motor.This classification of induction motor is based on the type of power supply required for its operation. For this example, refer to the motor equivalent circuit and calculations described above. Figure 1 Three Phase Induction Motor with all their Essential Parts. Induction … Three-phase AC induction motors are widely used in industrial and commercial applications. Answer 1. Frame size 180M and above, 380/660V-50Hz is standard. At starting, the voltage induced in the induction motor rotor is maximum (Q s = 1). Less than 1% . AC motors are used worldwide in many applications to transform electrical energy into mechanical energy.There are many types of AC motors, but this course focuses on three-phase AC induction motors, the most common type of motor used in industrial applications. This type of motor has a major use in the different industrial applications due to numerous benefits such as higher efficiency, reliable cost, minimum maintenance and self-starting feature. Three Phase Induction Motor The induction motor that runs on a three phase AC supply is known as a three-phase induction motor. Hello friends, I hope all of you are doing great. For this motors, we require three phase power supply, whereas thus three phase Power must be supplied in a sequence. Of Although single phase induction motor is more simple in construction and is cheaper than a 3-phase induction motor of the same frame size, it is less efficient and it operates at lower power factor. 1. 18. With the invention of adjustable speed drives and several other types of motor starters, three-phase motors have become favorable drives for variable speed applications.As these motors are important in load driving, it is also important to ensure their safety & protection against starting inrush currents, overloads, single phasing, overheating, and other faulty conditions. The single-phase induction motor is started by using some methods. 2. THREE PHASE INDUCTION MOTOR 1. THREE PHASE INDUCTION MOTORS ... Operation test should be performed once every three months. Three Phase Induction motor Faults and their Causes. Suspension Rod Suspension Rod . Induction Generators VII. f = Pns/2. Like any electric motor, a 3-phase induction motor has a stator and a rotor.The stator carries a 3-phase winding (called stator winding) while the rotor carries a short-circuited winding (called rotor winding).. Only the stator winding is fed from the 3-phase supply. 19. REFERENCES 1. Three-Phase Induction Motor: These motors are self-starting and use no capacitor, start winding, centrifugal switch or other starting device. In today’s tutorial, we are gonna have a look at Introduction to Three Phase Induction Motor. 17. Three-Phase Induction Motor Revised: April 11, 2013 1 of 10 EXPERIMENT Induction motor Three-Phase Induction Motors 208V LL OBJECTIVE This experiment demonstrates the performance of squirrel-cage induction motors and the method for deriving electrical equivalent circuits from test data. Let us discuss various types of single phase […] Three-Phase Induction Motor: Being self-starting, the three-phase induction motors use no start winding, centrifugal switch, capacitor, or other starting device. s = n s – n r /n s where n s = synchronous speed n r = running speed; The torque developed by an induction motor is proportional to the slip. There are mainly two types of induction motor on the basis of power supply, Single Phase Induction Motor and Three Phase Induction Motor. Construction of Three Phase Induction Motor. Flexible 5 ratings correspondence 220/380/415V-50Hz,220/440V-60Hz is standard. Synchronous Generators III. Because form utility, only single-phase supply is available. AC Motors. Record all nameplate information for the induction motor. There are two types of induction motor rotors: Squirrel-cage rotor or simply cage rotor. Induction motors, especially those of the squirrel-cage type, are the most common sources of mechanical power in industry. Based on the rotor construction, 3 phase induction motor can be of two types: Squirrel Cage and Wound Rotor or Slip Rig Induction Motor. Where φ s is the phase angle between stator phase voltage and the stator phase current I s. For motoring operation, the phase angle is always less than the 90º. How many types of Induction Motor ? Three-Phase Induction Machines V. 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