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Lightweight, Compact Unit As the transmission voltage is high, the current through the line will be less. If the injected emf has the opposite phase with the rotor, the resistance of the system . They are maintenance free motors unlike dc motors and synchronous motors due to the absence of brushes, commutators and slip rings. Starting is easy. For a given speed, torque is controlled by varying dc link current I d by changing the value of V d.Therefore, when supply is ac, a controlled rectifier is connected between the supply and inverter and when supply is dc, a chopper is interposed between the supply and inverter (Fig. These motors have less starting torque . The advantages of linear induction motors are: Low initial cost. A 3 phase squirrel cage induction motor is a type of three phase induction motor which functions based on the principle of electromagnetism. What are the advantages of an induction motor? A typical motor will be in the 20,000 watts to the 30,000-watt range. No rubbing part on the rotor, so maintenance cost is less. Induction motors were preferred in industries due to the advantages of its rugged construction, less maintenance and can be operated in explosive atmospheres also. Induction Motor Advantages There are many advantages of the induction motor which is mentioned here in detailed. Several advantages of capacitor start induction motors are mentioned below. Advantages of Induction Motors: The application of this motor is mainly in the washing machines, floor polishers, mixer grinders, AC fans, blowers, centrifugal pumps, drilling and lathe machine, etc. To permit automatic speed control when required, and; To protect the motor and other connected equipment from sustained overload, low voltage, etc conditions. In some applications the servo motor advantages become disadvantages. The three phase motor is self starting while the single phase motor can be made self-starting simply by connecting a capacitor in the auxiliary winding. These motors have a low power factor. A LIM may have a moving primary or a moving secondary. The two current generates a rotating flux which will make the single-phase motor self-starting. Disadvantages. Synchronous motors are rarely used in industry for drive applications. Power factor of a synchronous motor can be easily controlled by changing the excitation of the motor. They are very simple to manufacture, operate, and maintain, and is why induction motors are by and large less expensive than synchronous motors. While AC induction motors are more commonly found in motor-driven systems, they are often larger in size and less efficient than permanent magnet motor solutions. However, a slip ring is required to feed DC Supply to the Rotor in the case of a Synchronous Generator. This means that the conductor can be quite lightweight and compact in size, which also results in the supporting tower becoming lighter. The most important feature of an induction motor is that it is very simple in construction. The maintenance of an induction motor is very less compared to the DC motor and synchronous motor. Disadvantages of 3-phase Induction Motors The disadvantages of a 3-phase induction motor are given as follows Speed control of induction motor is done in this method by injecting a particular voltage in the rotor diagram. The construction of the Stator is similar in both Synchronous motors as well as induction motors. It requires less maintenance. No limitation of maximum speed due to centrifugal forces. However, a synchronous motor has a slip . This motor is a highly efficient motor. The disadvantages of linear induction motors are: A typical air gap in LIM is of the order of 25 mm while in a cylindrical motor it is about 1 mm i.e. This rotor is a cylinder of steel laminations, with highly . The unit is, overall, quite a portable one. Advantages of Universal Motor Unlike other motors, as the name suggests, the universal motor can be operated from both DC and AC voltage sources. Less Cost: Induction motors are less expensive than other motors like direct current and synchronous. i.e needs no starting capacitor like single phase induction motor. Other advantages include that it does not need a DC field excitation voltage. When a stator winding is energized by a three-phase supply, the rotating magnetic field is induced inside the stator conductors. High full load efficiency (up to 97%). Induction motors can be operated in polluted and explosive environments as they do not have brushes which can cause sparks. 5. Therefore, it needs only one source of supply and the three-phase AC supply is given to the stator winding. DC & AC Motors. Hence no starting methods are required, unlike synchronous motors. Easy and robust construction. 3 Phase Induction Motor Advantages. Low starting current. That difference has now shrunk to maybe 10-40%. The other advantage is that it can be easily to excite, easy to start and control requirements, and easy to detect fault level for the higher voltage .So the 9536 Words 39 Pages Following are the chief advantages of a 3-phase induction motor It has simple and rugged construction. Single-phase induction motors can be designed in a variety of sizes. The motor is economical & can be changed once it wears out before trying to reverse it. An electric pressure washer with an induction motor would be much heavier and, therefore, less portable. These motor also requires less maintenance. I have seen several 4 pole induction motors that have coils wound like this: Both the main winding and the auxiliary winding have 2 pairs of these coils. The working of an induction motor is very simple and unique. Therefore Induction motors ruled out all the motors in industries in every application. Squirrel cage induction motors most of the use of industrial applications because of self-starting motor and easy to adjust. The complexity (or lack thereof) of induction motors is the best advantage that they have over synchronous designs. Disadvantages of Three Phase Induction Motor The disadvantages of a 3-phase induction motor are given as follows Machines like a crusher might benefit from a higher . A three-phase Induction motor mainly consists of two parts called the Stator and the Rotor. DC motors may run from 96 to 192 volts and AC motor, three-phase AC motor running at 240 volts AC with a 300-volt battery pack. It is important to observe how in modern drives and . Stator of an induction motor consists of stator core and stator slots. Advantages of Squirrel cage Induction Motor Higher efficiency. But DC motors were still used in certain applications where induction motors cannot fulfill . Good speed regulation. The construction of the stator is similar to the three-phase synchronous motor, and the construction of the rotor is different for the different machines. The injected voltage (emf) needs to have an equal frequency with the slip frequency. Batter power to weight ratio. Speed control is obtained up to 5%. No overheating of the rotor. Disadvantages of Slip Ring Induction Motor It has more cost. Superiority of 3 Phase Induction Motors The three phase induction motors have a wide field of applications in the industries because of the following advantages are given below. The absence of brushes reduces the risk of sparking. Induction motor is a machine that simply operates on the induction type principle. 2. Advantages of Slip ring Induction Motor High starting torque Low starting current The main characteristic of this kind of motor is the same as that of a three-phase. Initial and maintenance costs are more than those of a squirrel cage motor, because a slip-ring induction motor needs slip-rings, brushes, short-circuiting devices etc. These include self-starting, reliability, low-cost operation, ruggedness and robustness [1]. Calculate the ratio of starting torque to full-load torque of a 3-phase induction motor . Therefore slip ring induction motors are generally employed where load requires high starting torque or good speed control. The rotor is a cylindrical laminated core with parallel slots. 2. 3. The disadvantages of a split phase induction motor include the following. Wound Rotor Induction Motor are less efficient than squirrel cage induction motors. Permanent Magnet Motors vs Induction Motors Four Advantages of Permanent Magnet Synchronous Motor: 1. It is less expensive. The efficacy of induction motor from 85% to 95%. Capacitor Start Induction Motor: Capacitor Start Induction Motor is a single-phase motor in which a stator and a single cage rotor are used. Because of high starting torque and low starting current, capacitor start induction motors have a wide range of applications. Speed regulation is poor when operated with external resistances in the rotor circuit. Advantages and disadvantages of induction motors Advantages. Not like the single phase motor, a 3 phase motor power factor can reach up to 0.9. Advantages of Single Phase induction motor This induction motor is smaller in size and lighter in weight. Advantages of AC Motor Low Cost - Lowest cost motor for applications requiring more than about 1/2 hp (325 watts). It has high efficiency and good power factor. Now I am moving towards the last section, in which I am going to tell you all about some of the application areas of Wound Rotor Induction Motor . The capacitor is in series with the start circuit, so it creates more starting torque, typically 200 to 400% of rated load. #2. Advantages of Induction Motor. It has self-starting torque. The induction motors have several advantages over equivalent DC motors, such as lower construction and maintenance cost, ease of operation, higher speed, durability, etc., which makes them more employable. When we apply three-phase voltage, to the stator winding then it would reach the three interconnected phase windings. The Induction motor has two sets of windings (copper or aluminum wire coiled to form electromagnets). Types of Electric Motors. Very rugged and can work in any kind of environment. But the cost gap between servo and induction motors has been shrinking for years. 1-phase induction motors have a longer life. It is less expensive. Low cost and less maintenance. Stator slots: in general two types of stator slots are employed in induction motors viz, open clots and semiclosed slots. The electric motors are available in 3 main segments like AC motor, DC motor, and special purpose motors. Less cost. Disadvantages of Squirrel Cage Induction Motor. An Induction motor operates only at a lagging power factor. Later, several experiments have been done to improve the performance of this type. What is the advantages of induction generator? Disadvantages of squirrel cage induction motor Poor speed control. Slip-ring induction motor has the advantages of high efficiency, energy saving, low noise, low vibration, safe and reliable operation, easy installation and maintenance, etc. These are some advantages of a single-phase induction motor. The induction motor would create torque by using electromagnetic induction. It is also cheaper in cost. The stator is the stationary part of the induction motor, and the rotor is the rotating part. Hence, its working is independent of the external environment conditions. Induction Motor Advantages: They are maintenance free motors unlike dc motors and synchronous motors due to the absence of brushes, commutators and slip rings. There are so many advantages for induction generators in comparison to other generators. Low maintenance cost due to the absence of rotating parts. DC motors, by contrast, have a commutator and carbon brushes that wear out and need replacing . Higher power factor. One of the important advantages of this motor is that it is self starting. The induction motor is cheaper in cost. Rotor: The rotor is a rotating part of an induction motor. The fundamental component of motor phase current from Fig. Advantages and Disadvantages of Permanent Magnet Motors . To limit the starting (or in rush) current, when necessary. It used to be that a servo system was maybe twice the cost of an induction motor system. Applications. The operation of the Single-phase induction motor can be done through a single power phase and used in domestic as well as industries. The maintenance of an induction motor is very less compared to the other motor like DC motor and synchronous motor. The biggest advantage of this kind of motor is that the AC power is provided by DC so that the motor can be accurately controlled and the life problem caused by the brush is solved. However, there is no limitation for the phase of that emf. The slip ring improves the efficiency and performance of a motor by improving system operations . Following are the chief advantages of a 3-phase induction motor It has simple and rugged construction. It has high efficiency and good power factor. Design of Stator. It is a highly efficient motor. More maintenance, because the rotor is to be connected to the external circuit. Slip ring induction motor have big advantage of having high starting torque compared to squirrel cage motor. Three-phase induction motors are self-starting whereas the single-phase induction motor is not self-starting. Size & Weight. Advantages of Squirrel cage Induction Motor Higher efficiency Higher power factor Robust construction Less cost The absence of brushes reduces the risk of sparking. Advantages of squirrel cage induction motor Good speed regulation. The motor is small in size and light in weight Induction motors generally will have low starting torque compared to dc series motor. A stator winding is placed in the stator of the induction motor and the three-phase supply is given to it. It has a good running performance. The advantages of a linear induction motor are listed below. It has self-starting torque. Advantages of Using Starters for Induction Motor : The functions of the starter are, To start and stop the motor. Speed cannot be adjusted. It is less expensive because its construction is very simple. Universal motors do not take too much space and are smaller in comparison. Good heat regulation. This led to the inventions of the induction type . Advantage of induction motors are that they are robust and can operate in any environmental condition Induction motors are cheaper in cost due to the absence of brushes, commutators, and slip rings They are maintenance free motors unlike dc motors and synchronous motors due to the absence of brushes, commutators and slip rings. Advantages of Slip Ring Induction Motor High starting torque. Low initial cost Low maintenance No overheating No limitation of maximum speed Power to weight ratio is better than the conventional induction motor Tractive effort does not depend on the speed Disadvantages The disadvantages of linear induction motors are listed below. It was invented by the scientist Tesla who earlier conducted several experiments on the working of the alternating current systems. They have only one moving part, the rotor, which makes them low-cost, quiet, long-lasting, and relatively trouble free. These motors are highly efficient. The rotating magnetic field cuts the winding of the rotor and due to this, the rotor current would create another magnetic field. The induction motor is used to drive mechanical loads only. Lesser maintenance It has good running performance. Slip can be defined as the difference between the flux speed and the rotor speed. - due to the simple design of the motor. Power Factor. In terms of size and weight, induction motors are bigger and heavier. AC MOTOR: INDUCTION MOTOR Most common motors in industry Advantages: Simple design Inexpensive High power to weight ratio Easy to maintain Direct connection to AC power source. 3-phase expands starting torque . Similarly, AC motors operate properly when the input source connected to it is an AC source. Advantages of single phase Induction Motor. High starting current. Advantages of an Induction Motor (IM) 1) The working of an induction motor is straightforward. Advantages The motor construction and the way electric power is supplied all give the induction motor several advantages are shown in the figure below. Less weight and small. Advantage of induction motors are that they are robust and can operate in any environmental condition Squirrel-cage Induction motors are cheaper in cost due to the absence of brushes, commutators, and slip rings They are maintenance free motors unlike dc motors due to the absence of brushes, commutators and slip rings. Comparison of relative efficiencies between PMSM motor and ACIM with 3:1 turndown. The efficiency of the induction motor is varying from 85 to 95%. The biggest advantage of AC induction motors is their sheer simplicity. March 21st, 2018 - Advantages of Induction Motor The motor construction and the way electric power is supplied give the induction motor several benefits such as " They are robust and simple in construction with very few moving parts AC Motors Controllers and Variable Frequency Drives May 5th, 2018 - Induction AC Motors are referred to as asynchronous motors or rotating transformers This . It can operate in any environmental condition, and the construction of an induction motor is robust and sturdy. This difference can be called a slip. Disadvantages of wound rotor induction motors : 1. It is used in an attempt to reduce the start current applied to the motor during start as a means of reducing the disturbances and interference on the electrical supply. Advantages of Squirrel Cage Induction Motor. Disadvantages of Squirrel cage Induction Motor Low starting torque. Rotor impedance at the time of starting is less. Advantages of Induction Motor The most important advantage of an induction motor is that its construction is quite simple in nature. But fear not, that is where you would use a BLDC motor, which . Operating performance of the induction motors depends upon the shape of the slots and hence it is important to select suitable slot for . It is called a 'squirrel cage' motor because the rotor inside of it - known as a 'squirrel cage rotor' - looks like a squirrel cage. It operates on the principle of which a conventional induction motor operates. List. For the same output and voltage rating, a synchronous motor is more efficient. An induction motor works on transforming action. The only drawback is that induction motors do not have very good positional control characteristics like in servos. The uses and applications of this induction motor . - For this reason, AC motors are preferred for fixed speed applications in industrial applications and for commercial and domestic applications where AC line power can be easily attached. The operation of the star-delta method is simple and rugged. It requires less maintenance. The rotor is connected to the mechanical load through the shaft. It reduces the mechanical stress on the motors hence less motor burning is caused. Electrical Drives & Control : Conventional and Solid State Speed Control of A.C Drives : Advantages and Applications of Induction motor |. This motor starts automatically (self) but a 1-phase Induction motor will not start automatically because it cannot expand starting torque. For low speed (< 300 RPM) applications, synchronous motors are more economical than induction motors. It does not require any complex circuit for starting. 6.46). Synchronous motor can also be used for power factor correction apart from supplying mechanical loads. Consequently, pressure washers that run on a universal motor are also smaller. The most important advantage is that the induction motor is self starting. Frequency regulation is a huge advantage of an induction generator. In an induction motor, to produce torque, at least some difference should be there in between stator field speed and rotor speed. Efficient Transmission So torque will be created due to the interaction between these two . Lesser maintenance. Generally, motor manufacture does not skew . A Linear Induction motor (LIM) is a special type of induction motor which gives linear motion instead of rotational motion, as in the case of conventional induction motor. Published by Electrical Workbook View all posts by Electrical Workbook Answer (1 of 12): They are cheap/easy to build, cheap/easy to maintain, And fairly easy to run with electronic drives. In industry, induction motors are used mainly because of their low cost, robust construction, good starting torque and low maintenance. It can be used for various motors of general purpose, such as ball mill, fan, compressor, pump, crusher, cutting machine, transportation machinery and other original motors. Stator: As its name indicates stator is a stationary part of the induction motor. While permanent magnet motor solutions . Advantages of induction motor: It is a very cheap cost compare to the other motors. They have high starting torque as compared to synchronous motors. These are available in different frame sizes so that they can be placed effortlessly in most of the machines. This is concentric winding and I've only found some information about this on the internet, but nothing about why is this made and how this works. In our project stator of LIM act as . The rotor or stator slot of the induction motor skewed through some angle so that the bars lie under alternate harmonic poles of the same polarity or other words, bars must be skewed through two pitches. The main purpose of skewing is to reduce the magnetic logging between the starter and the rotor. it . Induction motors offer a wide range of advantages. 1. To understand the working of an induction motor, let's first understand the parts that make it an excellent machine. When the windings in the stator are energized it induces current in the windings in the rotor (this invisible force is call induction, learn about the concept of induction here ). Advantages of Synchronous Motor. Below ZCL explains some of the advantages and disadvantages associated with synchronous motors and their applications. 3) It is a highly efficient motor; the efficiency of IM varies from 85 to 95%. The induction motor rotor does not have slip ring, the rotor conductors internally short circuited at the end rings. Low cost. On the other hand, DC motors can only operate properly when the input source is a DC source. Advantages ad disadvantages of induction motor: Induction motor is very cheap in cost to compare other motors. - Over 90% of all motors are AC induction motors . 6.45(b) is. Advantages of Induction Motor Following are some of the advantages of Asynchronous Motors: Highly efficient and simple in construction. Advantages: There are some advantages of induction motor which are given below. The main benefit of the single-phase induction motor is that is assembly is very simple, it is easy to construct. The stator works as the primary while the rotor works as the secondary. The competence of single induction motors is fewer associated to that of 3 induction motors. The stator construction of the induction motor is similar to the construction of stator of the Synchronous motor. Low power-factor Low maintenance as they do not have many parts like commutators or brushes. The advantages of a split phase induction motor include the following. Robust construction. It operates at a constant speed (i.e., synchronous speed) from no-load to full-load. The induction motor is self-starting. 1. 2) It is very cheap compared to the other motors. Advantages of Induction Motor The induction motors are robust. Applications of Induction motors: Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail. Cannot be started with full load except double cage induction motor. The induction motor is a single-excited motor. Induction Motor Advantages: Induction motors are simple and rugged in construction. Induction motors are cheaper in cost due to the absence of brushes, commutators, and slip rings.

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