In general, the electric motor of single-phase induction is a natural alternative to replace the electric motor polyphase induction in points where they can have three-phase power. These locations are: offices, homes, workshops and rural areas.
There are several types of single-phase electric motors, but among them is the electric motor with cage rotor and it stands out for the simplicity of manufacture, but mainly to be robust, reliable and have a long life without the need to pay maintenance regularly.
The phase electric motor vebm3611t divided comprises a main winding and an auxiliary that helps in starting; The auxiliary winding is in the electric motor creates a phase shift to produce a conjugate that is necessary so there is initial rotation and more acceleration.
Upon arriving in the rotation which is predetermined, the electric motor will have the auxiliary winding disconnected from the network via a key that normally act with the help of centrifugal force.
The electric motor undergoes four types of assays are routine, type, and special prototype. All these tests shall follow the standards of ISO 5383, it is this standard that defines the procedures to be followed in implementing the testing of electric motors magpowr products mro.
Type tests that the electric motor undergoes take into account the electrical resistance of the electric motor from the cold, the measurement of current and absorbed power at nominal voltage, there is the test with locked rotor where the current measuring the power consumed and torque at nominal or reduced voltage, there is also the electric motor endurance test hot, the tests that are related to the power supplied in the electric motor, the Maximum torque test at nominal or reduced voltage and withstand voltage test.
The electric motor has only thermal equilibrium when the heat is internally generated in the electric motor is converted to electrical energy into mechanical resulting in heat dissipated. Thus, ventilation is the only way to make the temperature of the electric motor becomes lower.
The most common systems of ventilation in the electric motor are open motor, it allows the circulation of the cooling medium is free in the electric motor and thus have direct contact with the air of the parts of the electric motor are heated; totally enclosed motor, where heat transfer occurs in the electric motor on the outer surface of the electric motor, for there is no flow of cooling medium between the inside and the outside.
In the electric motor m1220c of general application, the ventilation system is fetal the use of radial fans that have straight blades and this allows the electric motor to rotate to either side and thus the flow of air occurs anyway.