Once the three-phase induction motor started on a single-phase supply, it continuously runs on reduced capacity. The net output or efficiency of the motor is reduced 2/3rd of its rated capacity. This method is also known as the static phase converter method or phase-shifting method or rewinding method.
A 3 phase motor is a type of electric motor that is designed to run on 3 phase power, which is a type of alternating current (AC) electrical power. 3 phase power is commonly used in industrial and commercial settings because it is more efficient and can power larger motors.
However, it is sometimes necessary to run a 3 phase motor on a single phase power supply, such as in a residential or small business setting where 3 phase power is not available. In these cases, special methods must be used to convert the single phase power into 3 phase power in order to run the motor.
One method for running a 3 phase motor on a single phase power supply is through the use of a phase converter. A phase converter generates a third phase of power by using capacitors and a control circuit to create a voltage imbalance between the two existing phases. This creates a rotating magnetic field, which is necessary for the 3 phase motor to operate.
Another method is to use a three phase motor with a single phase capacitor. In this case, the capacitor is used to create a phase shift between the two existing phases, which allows the motor to start and run. However, this method is not as efficient as using a phase converter and may not be suitable for larger or heavier loads.
It is important to note that running a 3 phase motor on a single phase power supply can potentially cause damage to the motor and should be done with caution. It is always best to use a 3 phase motor with a 3 phase power supply if possible.
In conclusion, a 3 phase motor is a type of electric motor that is designed to run on 3 phase power. However, it is sometimes necessary to run a 3 phase motor on a single phase power supply, in which case a phase converter or single phase capacitor can be used to create a rotating magnetic field and allow the motor to operate. While it is possible to run a 3 phase motor on a single phase power supply, it is not always the most efficient or safe option and should be done with caution.