Monthly Archives: novembro 2017

Continuous Electrical and Mechanical Current

AC machines can be considered as the most used in comparison to DC motors, taking into account relevant factors. As an example, the simpler construction and maintenance can be highlighted, as well as having a longer life, since for the same power as a DC motor, the engine becomes considerably more economical.

The electric motor basically consists of a machine whose main purpose is to transform electric energy into mechanical energy. The electric motor is considered the most used of all other existing types, by combining the advantages of using electric power, which has low cost, easy transportation and cleaning and simplicity of command, since it has a simple construction, low cost, wide adaptation versatility of the most diverse types, in addition to gaining better yields.

Therefore, DC motors and alternating current can be applied to simplified equipment such as electric traction for batteries, forklifts, buses, trucks, household appliances, portable machines and tools in the case of direct current, for example. AC motors can be found in water pumps, compressors and machines used in industry in general.

Electrical Power Systems

It is important to state that the proper transmission of electric energy must be effected through a system of devices, such as transformers and electric conductors, called transmission lines, which transmit the electric energy produced in the generating units to the consumer units or loads. The transmission system makes it possible for the electrical voltage coming from the terminals of the generators found in the generation units to reach the power supply of the consumption units required by the system.

The system whose function is to perform the transportation of electric power from the generating units to the consumer units is basically formed by three subsystems. The power generation system is composed of elements and components responsible for the process of converting energy from any primary source into electrical energy and into other components of the generation units.

In this way, it is worth mentioning that the transmission system consists of components responsible for the process of transporting the energy obtained through the different generation systems to the distribution systems that are interconnected by the transmission system. The distribution system is composed of the elements that must act in the adequacy of energy for the use of large, medium and small consumers.

Elements called rotor and stator

The rotor can obtain two or more windings, although they are always even number and all connected in series, considering that each winding becomes responsible for the production of one of the poles of the electromagnet. In some synchronous motors, the rotor may consist of a permanent magnet in place of an electromagnet, in this case being called a permanent magnet synchronous machine. The stator, also known as armature, consists of the fixed part of the machine, designed around the rotor so that it rotates inside it, which is constituted by a package of blades of a ferromagnetic material wrapped in a set of windings, properly distributed around its circumference and positioned in grooves.

The stator windings are fed by means of a three-phase alternating voltage system. Throughout the stator AOM3543 circulates all the electric energy produced, both the voltage and the electric current that circulate, are considerably high in relation to the rotor, whose objective is only to produce a magnetic field to excite the machine so that it is feasible to induction of voltage at the terminals of the stator windings.