![]() ![]() The slotted stator core carries a three phase winding connected either in star or delta and wound for definite number of poles depending on the speed required. The radial ventilating ducts are provided along the length of the core with the help of spacer plates. The built-up core is fitted in either a cast or fabricated steel frame which provides the necessary mechanical protection and carries a terminal box and end covers housing the bearings. Such laminated construction for the core ensures low iron loss. ![]() 3: Typical core laminations for (a) Stator, (b) Rotor They are insulated from each other by varnish or oxide coating.įig. These stampings are usually 0.4 to 0.5 mm thick and made from high grade silicon steel. 2: Various forms of stator and rotor slots (a) Open, (b) Semi-closed, (c) Totally closed The extra resistance could affect the motor efficiency, so it would be used for a short period of time.Fig. We could only change the rotor resistance in a wound rotor induction motor by adding extra resistance. It is used in industrial drives to run the conveyor beltĭifference between squirrel cage induction motor and wound rotor induction motor.What are the applications of the squirrel cage induction motor? A motor would draw more current if there is a reduction in supply voltage and if there is an increase in voltage then it would saturate the magnetic components of the squirrel cage motor These motors are really sensitive to the supply voltage variations/ fluctuations.High starting current and poor starting torque.A lot of power would be consumed during the starting time. ![]() What are the disadvantages of the squirrel cage induction motor? There won’t be any explosion due to the lack of slip rings and brushes.Low maintenance because there is no slip rings or brushes.What are the advantages of the squirrel cage induction motor? So when an AC current passes through the stator windings then a rotating electromagnetic field will be created. The rotor is a cylindrical steel lamination with a conductive material embedded in its surface. So the rotor inside this would look like a squirrel cage. In the squirrel cage type, there won’t be any slip rings but it could have conductors like copper, and also it will be galvanically isolated. In order to reduce noise, the bars would be slanted in a small rotor. Aluminum bars would be molded on the slots and they will be short-circuited at the end rings. Working principle of Squirrel cage induction motorĪ squirrel cage induction motor will be composed of the squirrel cage windings. This type of induction motor can be used where the load would need high starting torque What are the applications of the wound rotor induction motor? The power factor and efficiency of the wound rotor motor is not good when compared to the squirrel cage motor.The speed regulation is not good while operating with an external resistor in the rotor circuit.Expensive due to the maintenance cost, like upkeeping the slip rings, rotor windings, and also the carbon brush.What are the disadvantages of a wound rotor induction motor? This type of induction motor can be utilized to accelerate high inertia loads that would require a certain time to gain speed.High starting torque will be available with a low starting current.Starting current and speed can be controlled.We can add external resistance to this type of induction motor.What are the advantages of a wound rotor induction motor? There could be a squirrel cage type too, which is done by shorting the aluminum bus bars together at the end of the ring, and thus it would look like a squirrel cage circuit. The rotor is the rotating part, the rotor winding could be three-phase windings which is conventional. The stator would be composed of a steel frame and this would support the cylindrical core. There are two major parts of an induction motor one is the stator and the other is the rotor. It also has high reliability and efficiency, and also it doesn’t need to be synchronized. The induction motor is a three-phase AC motor and it is widely used in many industries the major feature of an induction motor is that its construction is simple and rugged. ![]()
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