Electrical Energy Into Mechanical Energy

1543 Words7 Pages
Efficiency of any machine is how well it can convert one form of energy to another. Induction motors transform electrical energy into mechanical energy. The induction motor receives power from the provision mains through the stator coil windings. The input power is electric power. The power from the stator coil winding is transferred to rotor, via air gap by induction principle. The output power is a mechanical power. The mechanical power is obtained at the shaft of the motor to perform mechanical work. Then the efficiency is established by knowing the input power and the output power. Efficiency of any machine is the quantitative relation of output power and input power. The efficiency of induction motor is determined using the equation…show more content…
Its energy can be generated for both low and high voltage purposes, ranging from 12V for domestic uses to up to 240V for industrial applications. This quality empowers it to significantly decrease waste in electric power. Durability: another major advantage an induction motor has is that it is extremely rugged. This makes it the optimal machine for a number of uses. Induction motors are cost effective, low cost of maintenance and as a result these motor can run for years with relatively no cost or maintenance as they do not contain brushes, commutators, and slip rings. Induction motor can be operated in toxic environments as they don’t contain brushes that can cause sparks (Advantages of electric induction motors. n.d.). 4.3 Negatives Speed Control: the main disadvantage of AC motors, is that their speed is difficult to control. AC motors can be operated with variable frequency drives that provides smooth turning torque, at low speeds and get control over the speed of the motor up to its suggested value. Variable frequency drives enhance speed control, but create losses with low power quality. Control Complexity: another significant disadvantage is that an AC motor controller must convert AC electricity to DC, and back again to an adjustable frequency and voltage output to the AC motor. Power and Torque: the major drawback of using an induction motor has been that they develop less power, or less torque. The motor efficiency drops at low loads because
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