ziehl-abegg.com. The insulation between the windings is generally varnish or oxide coated. ziehl-abegg.com. Protection Type : IP44, IP54, IP55. These motors are provided with fans, so less heat is generated. A squirrel-cage rotor is the rotating part of the common squirrel-cage induction motor.It consists of a cylinder of steel laminations, with aluminum or copper conductors embedded in its surface. In this article, we will learn about Squirrel cage and slip ring induction motors. But there is more to it. 2 shows the double-cage model used to simulate induction motors’ behaviors. Fig. Share Inquire Now Next Product . ⇒⇒ Speed control is not easy in these motors. The construction of squirrel cage induction simple and rugged. Pages. In previous, we saw complete details related to slip ring induction motor. These motors can operate at any working conditions. When we apply A.C supply to stator winding flux generated in the stator winding. The most popular squirrel cage induction motor is of a 4-pole design. Some disadvantages of squirrel cage induction motors are: While slip ring induction motors (also known as wound-rotor motor) aren’t as popular as squirrel cage induction motors, they do have a few advantages. The construction of Stator of the induction motor is almost the same as other motors. now let’s see how squirrel cage induction motor works? Figure A shows the speed-torque curves of a squirrel-cage induction motor and a blower which it drives. Pullout torque is always greater than or equal to 200 percent of the rated load torque. 1 laboratory manual electrical machine ii laboratory steady state equivalent circuit of a squirrel cage induction motor. A double squirrel cage induction motor consists of a rotor that has two independent cages one above the other in the same slot. These motors have the highest overhang and poor space factor in slots. Poles : 2 up to 12 Poles. A squirrel-cage rotor is the rotating part of the common squirrel-cage induction motor. Watch this video and learn basics of Squirrel Cage Induction Motor 1 laboratory manual electrical machine ii laboratory steady state equivalent circuit of a squirrel cage induction motor. Squirrel cage Induction motors are quite common in the industry. Enter your email below to receive FREE informative articles on Electrical & Electronics Engineering, Squirrel Cage Induction Motor Working Principle, Squirrel Cage Induction Motor Construction, Application of Squirrel Cage Induction Motor, Advantages of Squirrel Cage Induction Motor, Disadvantages of Squirrel Cage Induction Motor, Difference Between Squirrel Cage and Slip Ring Induction Motor, Classification of Squirrel Cage Induction Motor, SCADA System: What is it? For this Class, the starting torque is equal to rated torque for larger motors and is about 200 percent or more of the rated torque for the smaller motors. Here rotor core is laminated to avoid power losses from eddy current and hysteresis. Squirrel cage Induction Motor 2. Rugged 1.4. Changing in power factor is not possible. In operation, the non-rotating stator winding is connected to an alternating current power source; the alternating current in the stator produces a rotating magnetic field. In previous, we saw we can add external resistance in the rotor in slip ring induction motor. YEJ2 series motor is an improvement of YEJ series motor. When the supply voltage is reduced, an induction motor draws more current. The figure itself depicts many difference between the two types of motors. 1) 1. What is squirrel cage induction motor? Squirrel cage induction motor is most popular in industries and most used motor among all AC motors. Induction motors always operate with lagging power factor. In such machines there is no need to insulate the conductors from the iron. Your email address will not be published. Squirrel Cage Motor Specifications. Slip is a measure of the difference between the speed of the rotating magnetic field and rotor speed. This type of rotor is cylindrical laminated core. Squirrel cage I.M is generally used where we require constant speed and no speed control drives. These motors are having the difference in rotor construction. It consists of a shaft, short-circuited copper/aluminum bars, and a core. der Käfigläufer-Induktionsmotor squirrel cage induction motor [TECH.] Voltage : 380 up to 13,800 V. Frequency : 50 / 60 Hz. Squirrel cage IM is skewed to avoid the cogging effect in motor. der Kurzschlussläufer-Motor squirrel-cage motor [TECH.] It is called a ‘squirrel cage’ motor because the rotor inside of it – known as a ‘squirrel cage rotor’ – looks like a squirrel cage. In this Design of Class motors has very high starting torque (275 percent or more of the rated torque). Construction of slip ring induction motors needs slip rings, brushes, short-circuiting device, etc. Rated output: 18.5~355 kW . Some of the advantages, disadvantages and applications of squirrel cage induction motor compared with slip-ring induction motor are discussed below: The conversion process is … Induction motors have been ruling the industrial world for many decades. Now let us discuss in detail, the most common form of induction motor, the “Squirrel cage” induction motor. The rotor bars are short-circuited […] Protection Type : IP44, IP54, IP55. r) of a three phase squirrel cage induction motor using 1. Squirrel Cage Induction Motor . Here you will know the Squirrel cage induction motor working principle, construction, application and advantages of the squirrel cage induction motor. The reason behind the name “squirrel cage” is because of the type of rotor used in these motors. Induction motors do not require any additional power source. Squirrel cage induction motors are: 1.1. MENZEL squirrel cage induction motors are available in all standard motor cooling and protection types for low-voltage from 75 kW as well as medium and high voltage up to 25000 kW (25 MW). To withstand high currents, the rotor structure is modified and more resembles a cage than a winding. The squirrel cage induction motor is a type of AC Electric motor that converts electrical energy to mechanical energy, thereby impacting motion on various machines connected to it. Slip ring or Wound induction motor 3. In these type of motors, the rotor is simplest and most rugged in construction. 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. Poles : 2 up to 12 Poles. So here there is two fluxes, one is the stator flux and the other is the rotor flux, and the rotor flux will lag behind the stator flux. One motor is the called the main motor, and another motor is called the auxiliary motor. IGBTs have found widespread applications in the industry [6].A typical large industrial motor is shown in Fig. der Doppelkäfigankermotor MENZEL squirrel cage induction motors are available in all standard motor cooling and protection types for low-voltage from 75 kW as well as medium and high voltage up to 25000 kW (25 MW). YKK Series Three Phase Asynchronous Electric Motor . Output : 160 up to 2,000 kW. Windings are such placed that they are electrically and mechanically 120o apart from in space. Hope you know everything fundamental related squirrel cage induction motor. Full-load slip (It is typically 7 to 11 percent, but may go as high as 17 percent or more) in this class of design is quite high because of the high rotor resistance always. Robust 1.3. It is very commonly used in industries because it is very cheap, robust, efficient, and reliable. We saw Squirrel cage induction motor Applications. Slip Ring / Wound Rotor Induction Motor. It enables the motor to make a rapid brake when the power is off. The direction of rotation: The direction of rotation of these motors can be reversed if you interchange two power lines out of three. Let’s start. Basically anyone working on or around electric motors needs to understand how to troubleshoot any issues with a squirrel cage rotor. Now, here the rotor windings are short-circuited. When current flows through the rotor circuit it generates rotor flux. Thank you. These motors have higher efficiency and low cost because of that in 90% application of induction motor this type of motor is used. Now let’s move toward the construction of the squirrel cage rotor. Speed control of three phase squirrel cage induction motor using V/F method is implemented. For a given frequency, synchronous motor always runs at a constant speed called as synchronous speed whatever the amount of load it may be on it. The synchronous motor does not have any starting torque we need provide some auxiliary mean to generate require starting torque. In the transient behavior analysis of a squirrel-cage induction motor, the parameters of the single-cage and double-cage models are studied. In this Class, pullout torque is always of 200 to 300 percent of the full-load torque and it occurs at a low slip (it is less than 20 percent). Rated output: 150~8000 kW. Also lets get to know the methods which are used to control the speed of squirrel cage. Squirrel Cage Induction Motor once the external resistances are cut out and shorted as the Motor reaches the base speed. The frequency of the rotor current = slip × supply frequency. In motor rating up to 100 kW, the squirrel cage rotor is made up from the aluminum cast. Let’s start. This example is from a small air fan. Squirrel cage motors operate at nearly constant speed, high overload capacity, and operates at better power factor. What characterizes an induction motor is the fact that only the stator is connected to the power supply. der Kurzschlussläufermotor squirrel-cage motor [TECH.] The reason behind the name “squirrel cage” is because of the type of rotor used in these motors. Home; ... an open bar or ring in squirrel cage motors or shorted field coils in synchronous motors. Squirrel cage rotor is made up of aluminum or copper bars which are placed parallel to each other and all the bars ( conductors ) are short-circuited with end rings. So the advantages of squirrel cage is in below: In this motor, the rotor is made up from aluminum bars or copper bars, So less material required for rotor construction And this will also reduce copper losses. Variable voltage control 2. When a 3 phase supply is given to the stator winding it sets up a rotating magnetic field in space. This ensures maximum flexibility in industrial applications. The main difference between slip ring and squirrel cage induction motor is the rotor construction. Service Factor : 1.00. thank you. Most of the industries prefer these type of motor due to less maintenance cost, higher efficiency, and their lightweight construction. Sr. No. It is low cost and requires low maintenance in comparison with other motor types. The Squirrel Cage induction motor is the most commonly used motor in industry. Squirrel cage induction motors are used a lot in industry – as they are reliable, self-starting, and easy to adjust. The rotor of a three-phase squirrel cage Induction motor consists of a set of non-insulated bars that are interconnected by short-circuit rings. This can be done by simply adjusting the shape of the bars in the rotor. Fig. Class C Designs are used for high-starting-torque loads (loaded pumps, compressors, and conveyors). 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