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Asynchronous motors or AC (Alternating Current) motors or induction motors, are devices where the power for operation is supplied by an alternating current (AC). The supply voltages in an alternating current supply vary together in such a way that it periodically reverses its direction. This alternating current is represented by a sine wave. The power is supplied to the motor through electromagnetic induction (current is produced across the conductor when it passes through a magnetic field) and it does not consist of brushes and commutators to supply current, as it is in the case of DC. There are mainly two types of AC motors - single phase and three phase motors. Single phase motors are very efficient when you need lighter loads and the horse power is less than 1 HP. Three phase motors are used for producing higher horse powers and for larger loads. Uses of AC Motors There are different sub divisions or varieties of AC motors that has various industrial and domestic applications. Some of them are listed below: • Single Phase Motors - Most of the electrical power supply for domestic use such as in houses and other small commercial centers are provided with single phase current. The single phase motors are used in many electric appliances such as electric fans, dehumidifiers, refrigerators, compressors, washing machines, dryers, air conditioners, record players, stationary tools (capacitor start motor) etc. • Poly Phase Induction Motors or Three Phase Motors - These motors are used in belt conveyors, blowers, pumps, industrial motors, tape drives, audio turn tables, clocks, compressors, traction motors, synchronous condensers, grain dryers, saw mills, pump storage hydro electricity generators ( pump water to higher elevation to generate electricity in the same machine) etc. The advantages of using this motor is its long life, low cost and higher efficiencies because the three phase device uses less conductor material to transmit the power at the same given voltage. It is also ideal for extremely high loads and involves low operational costs. Three phase motors that can be operated at varying frequencies are also available. These motors help in avoiding unnecessary issues caused in the starting of three phase motors. • AC Servo Motors –These motors are in fact two phase motors that have high speed, heavy gear and low torque. AC servo motors are used to drive large machines in industries and employed for other commercial purposes too. These motors are also used as power amplifiers. The resistance in this motor is kept intentionally high to help maintain a linear relationship between the speed and torque. Alternating current motors are also used in devices such as in televisions, elevators, fans in our personal computers and many other industrial applications. Alternating current motors are more efficient compared to direct current motors in many ways, which is the main reason for its wide usage. Find substantial list of industrial supply products like single phase motor, three phase motor, ac motor and corrugated box from trusted manufactures at gajindustrialsupply site. Order anywhere from the world and get benefited.
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