An induction motor is an electric motor which runs on direct current. An induction motor uses magnetic fields to convert mechanical energy into electrical energy. This type of motor was invented around 1906 by Russian scientists who were working on a project to develop a high-speed ship propeller. But, their invention was later abandoned due to many reasons.
This type of motor is still in use today. It has many advantages over other types of motors. One of the major advantages of an induction motor is that it is silent. It does not produce any unpleasant noises which makes it perfect for use in many industries. Another advantage is that it is light and compact.
Single-phase Induction Motor
Split Phase Induction Motor
A split phase induction motor (SPIM) is an electric motor with two windings, one for each of the phases of the motor. The third winding is used as a neutral or “dummy” winding. This allows the motor to operate continuously as a generator to recharge the battery. By using this type of motor, it is possible to achieve very high levels of efficiency.
SPIMs are more efficient than other types of electric motors because they have no mechanical commutators or brushes. SPIMs are more durable than other types of electric motors because they use magnetic forces to create rotational motion instead of sliding friction.
SPIMs are more compact than other types of electric motors because they do not require a rotor shaft. This makes it possible to design a smaller, more rugged motor that is also lighter.
A split phase induction motor (SPIM) is a type of electronically commutated motor. It has the advantage of being able to run at very high speeds with almost no vibration or noise. This makes it a good choice for a wide variety of applications including fan motors, blower motors, conveyor motors and so on.
This is the most common type of induction motor used in home appliances. It consists of a stationary housing with an internal squirrel cage rotor. The stator is fixed inside the housing and two sets of external copper bars are attached to the outside of the housing.
When current passes through these bars, a magnetic field is set up which causes the rotor to rotate. As the rotor turns, it interacts with the stator and produces a counteracting force which keeps the rotor turning. This interaction between the rotor and the stator is called “induction”.
The main advantage of this type of motor is that it is very efficient and has a long life. However, it is not as economical as the other types of induction motors.
Capacitor Start Induction Motor
A capacitor start induction motor is a type of electric motor that uses a small amount of energy to “kick-start” the main motor when it is turned on for the first time. Capacitor start motors are very common on large equipment such as fork lifts, wheel loaders and backhoes. They are also used on some mowers, snow blowers and other small, low-power equipment.
The advantage of using a capacitor start induction motor is that it is very easy to use. The operator simply has to turn the equipment on for the first time and then walk away. The motor will run for a short period of time (about 15-seconds) and then “catch” on its own.
This type of motor is very economical to operate and very quiet. It is important to note that not all capacitor start motors are created equal. Some are much better than others. Make sure you get one that has been designed and tested to last.
This type of motor is used in a wide variety of applications, but is especially common in large equipment such as fork lifts, lawn mowers, chain saws, and so on. They are also used in hybrid cars and other high-tech equipment.
Capacitor Run Induction Motor
A capacitor run induction motor (CRIM) is an electronically commutated motor with permanent magnets. The CRIM has two salient features: the stator does not contain any copper windings, and the rotor does not have any iron plates.
The absence of copper windings in the stator means that the CRIM is lighter than a comparable induction motor, and also, it has a higher torque constant. This combination of features makes the CRIM an excellent choice for high-speed, low-load applications such as washing machines and certain types of mixers.
This is one of the best ways to get maximum performance out of your engine. This type of motor is very similar to a conventional induction motor, except that it has a capacitor bank instead of an inductor bank.
A capacitor bank stores electricity for a fraction of a second after the power is turned off, and this allows the capacitor to continue to run the motor for a short period of time even though the battery has been disconnected. This means that the motor will run cooler and will last much longer.
A capacitor-run induction motor has two main advantages over a conventional motor. It is much lighter and more compact and it has a much longer life expectancy. This type of motor is ideal for use in appliances that have a heavy duty continuous duty cycle.
You can find these types of motors in high-performance applications such as snowmobiles and outboard motors, but they are also used in passenger vehicles. They are more fuel efficient and provide smoother, more refined acceleration.
Shaded Pole Induction Motor
A shaded pole induction motor (SPIM) is a type of induction motor that uses a network of vertical conductors called “shaded poles” to create a magnetic field. SPIMs are often used in ventilation systems because they have fewer parts than other types of motors, are very quiet, and have long life. SPIMs can also be used for driving compressors and pumps.
SPIMs are used in a wide variety of applications, including fans, blowers, conveyors, pumps and many others. They are particularly well suited for use in small, low-power applications such as small appliances and portable equipment.
SPIMs have very high torque, which makes them very efficient. They also have a very high stall torque, which means they can be used in applications where a lower stall torque would result in the motor stalling.
Shaded pole motors are widely used in a variety of industrial applications including paper mills, food processors, and cement kilns. They are also used in a variety of other types of electric motors such as fan and pump motors, and in traction and conveyor drives.
Three-Phase Induction Motor
Squirrel Cage Induction Motor
A squirrel cage induction motor is a type of electric motor that uses a squirrel cage for its magnetic field. This type of motor is often used in washing machines, dryers, and dishwashers. It has a number of advantages over other types of motors including being very quiet, having no mechanical parts, and being maintenance free.
It also has the advantage of being able to run at extremely high speeds. This makes it ideal for use in industrial applications such as pumps and conveyors.
The squirrel cage is made up of thin steel bars and it is placed inside the iron core of the motor. These bars are held in position by end plates. They are kept in place by a spider or similar type of holding device.
This type of motor has the disadvantage of having a high “iron loss”. Iron loss is the amount of iron in the motor that becomes heated up and thus reduces the efficiency of the motor.
Wound Rotor or Slip Ring Induction Motor
A wound rotor motor uses a stator made of silicon steel and a rotor with copper wire wound around it. The silicon steel is much stronger than plain carbon steel and this gives the motor an incredible life. The silicon steel also has a very high resistance to corrosion. This motor is the most common type of induction motor used today. It is the most reliable and the most economical to run.
A slip ring motor is similar to a wound rotor motor except it uses aluminum or bronze slip rings instead of silicon steel. The slip rings allow the rotor to turn freely while maintaining electrical contact. This type of motor is less expensive than the silicon steel wound rotor motor, but it has lower efficiency.
Wound rotor motors are a great choice for low-speed applications such as table saws, drill presses, and so on. A slip ring induction motor is similar to a wound rotor motor except it has brushes instead of a “winding” of an iron core. These motors are very common because they are so reliable. They are also a great choice for high-speed applications like drills and circular saws.
These motors are used in high-performance, high-torque applications such as marine, industrial, and heavy-duty commercial equipment. They are very robust, yet light and compact.
What are the basic parts of an induction motor?
The basic parts of an induction motor are the rotor, stator, main winding, auxiliary winding, rotor circuit breaker, armature, slip ring, base plate, and end shield.
Rotor – The rotor is the part of the induction motor that turns with the shaft attached to it.
Stator – The stator is the other major component of an induction motor. It is comprised of a large number of steel laminations wound together in a cylindrical shape.
Main Winding – The main winding is the part of the stator that turns with the rotor.
Auxiliary Winding – The auxiliary winding is the part of the stator that does not turn with the rotor.
Endshield – The endshield is the component of the induction motor that covers the end of the stator. The endshield prevents the magnetic field from extending out beyond the end of the stator.
Why 1-phase induction motor is not self starting?
As the self-starting of the motor depends upon the inertia of the rotor, so the small inertia causes the motor to get started. Also the motor is not self starting for the following reasons:
The rotor carries a large load. The rotor carries a large inertia. The external forces acting on the rotor are very large. The external forces acting on the rotor are caused by the reaction of the magnetic field of the magnets in the stator.
Why 3-phase induction motor is self starting?
The induction motor is self starting because of the following reasons: The stator is energised by the supply of current through the start winding. The rotor is also started by the induction or self inductance effect of the rotating field. As soon as the rotor has gained sufficient speed, it then becomes a generator and supplies current to the load via the run windings.
What are the functions of the induction rotor?
Is to convert the kinetic energy of the motor shaft to electrical energy, i.e. the rotor acts as a generator. To produce a rotating magnetic field to induce current in the rotor conductors.
This is done by exciting the magnetic field with an electric current which is induced by the movement of the rotor and stator poles past one another. The rotor poles are connected to the shaft and the stator poles are connected to a d-c source.
Where is the induction motor used?
The most common use of the induction motor is as the main drive motor in domestic, commercial and industrial applications. It is also used in the drive of small domestic appliances, such as blenders, food mixers, electric drills, vacuum cleaners, etc.
In addition, it is used in large compressors for heating, cooling and air conditioning systems. Also, many industrial users employ the induction motor as the prime mover in a system that includes another type of motor, such as a synchronous motor or a permanent magnet motor, to do the heavy lifting.
What is the advantage of an induction motor?
The advantages of an induction motor include: Induction motors are generally smaller and lighter than other types of electric motors for the same power rating. They can be used in tight places where other types of motors would not fit.
They have no commutator or brushes to wear out. They are much quieter than DC motors and they do not draw nearly as much current from the source as a DC motor. An induction motor will run cooler than a DC motor because there is no commutator or brushes to get hot.
What is the disadvantage of an induction motor?
Induction motors are typically not self-starting like a synchronous motor. Induction motors typically don’t work well with variable loads (such as variable speed drives). Induction motors typically aren’t as smooth and quiet as synchronous motors.
An induction motor is an electric motor which uses magnetic attraction instead of the more common method of magnetic repulsion. This type of motor is more efficient than other types of motors. It has fewer parts, it weighs less and it is cheaper to manufacture.
Because of these reasons, induction motors are used in many applications where power is limited. For example, they are often used to drive fans or the like in small appliances such as hair dryers or curling irons. They are also used to provide motive power in a wide variety of small tools and devices.