An Induction Machines is a device using electrical energy to produce mechanical energy.
Different types of induction motors available in the market and in here you can get the idea of what are the advantages and disadvantages of induction machines.
Heres the deal:
What are the types of AC Machines
There are several types of Motors available on industry and today we are going to discuss on AC Machines and following are types of ac machines.
There are so many advantages and disadvantages of Alternative Current Induction Machines over other types of motors.
Before we go deep into advantages and disadvantages of AC Induction motors we will check what are the types of motors available in the electrical industry.
AC Motors divide into Synchronous Motors and Induction motor and then Induction motors divide into Single phase and Three Phase motor.
Advantages of Induction Machines
1. Simple and unique Design
A series of three windings in the stator section with a simple rotating section rotor.
The changing field caused by the 50 or 60 Hz this type of Ac motor winding are easy to maintain and design.
So this kind of AC motor got a very simple form of design unlike complex designs in DC and a special type of motors.
2. Low Cost compare to other motors
The AC motor has the advantage of being the lowest cost motor for applications requiring more than about 1/2 hp (325 watts) of power.
This is due to the simple design of the motor.
And by comparing to another type of motors such as DC motor’s this type of motors are very cheap.
3. Induction motors promote reliable operation
This indicates how AC (Auxiliary Current )motors are Reliable than other type of motors such as DC ( Direct Current ) motors.AC motors are extremely reliable compared with other type of motors and the operation is also very easy.
4. Low maintenance operation
The induction motors are build to work under rough conditions and it breaks rarely compare to another type of motors.
The Induction motors require a minimum operation and so the operation cost also low.
• There are no brushes to replace.
• AC motor can expect to need new bearings after several years of operation.
• If the application is well designed
Disadvantages of Induction Machines
1. Expensive speed control
Speed control is expensive and the electronics required to handle an AC inverter are considerably more expensive AC inverters and AC motors are usually more cost-effective than DC motors and DC drives for applications larger than about 10 horsepower, because of cost savings in the AC motor.
2. Poor positioning control
Positioning control is expensive and crude. Even a vector drive is very crude when controlling a standard AC motor.
3. High starting current
Squirrel cage motors suffer from drawing high starting current (some 6-8 times full load current) so I2R losses at starting are much greater than the full load.
Lengthy starting periods thus cause early failure. Direct online (DOL) starting is usually the more favored.
I have mentioned some motor starting methods in a motor controlling section of this report.
By Comparing Advantages and disadvantage of AC motors its provide significant advantages over another type of motors so in most of the industries in Engineering filed AC motors are widely used due to benefits of it.
