Monthly Archives: April 2021

The Importance of Electric Motors

The electric induction motor is the most widely used motor in the industry, and the squirrel cage induction motor is what prevails. This fact is because most current systems of electric power distribution is AC (alternating current). Compared to the DC motor, the induction motor has the advantage of its simplicity, which is explained at low cost and maximum efficiency with minimal maintenance. The efficiency is high for medium and maximum load, and a good power factor can be ensured with a correct selection.

The drive of machines and mechanical equipment by electric motors is a subject of great economic importance. In the field of industrial drives, we evaluate that from 70 to 80% of the electrical energy consumed by all the industries is modified in mechanical energy through electric motors. The electric motor needs to be identified and treated as a power machine, whose peculiarities involve certain care, such as installation and maintenance, as it plays a role of relevant importance to the comfort and well-being of all humanity in today’s world.

Squirrel cage rotor motors

Squirrel cage rotor motors can be used with single phase alternating current employing various inductance and capacitance devices that change the characteristics of the single-phase voltage and make it look like the biphasic one. This type is called multiphase motors or capacitor or capacitor motors, depending on the devices used.

Battery motors in series with switches leeson 120996.00, which work with both direct and alternating current, are called universal motors. These are manufactured in small sizes and are used in household appliances.

Single-phase squirrel-cage motors do not have wide starting torque, and uses repulsion-induction motors for torque applications. This type of motor can be multiphase or capacitor, but has a manual or automatic switch that allows the current to flow between the switch brushes when the motor is started and the short circuits of all the switch segments after the engine reaches a critical speed. The induction-repulsion motors are thus called, as their starting torque, depending on the repulsion between the rotor and the stator, and their torque while in operation, will depend on the induction.

The Engine Operating Basis

The working foundation of electric motors is the principle of magnetic force where an inductor circuit called a stator, generates a fixed magnetic field so that the induced circuit called the rotor, enters into motion when being trodden by electric current. One of the precursors in the study of engines was Michael Faraday. In 1822, during his experiments, he saw the emergence of a circular motion by working out a circuit in series with a battery of direct current, magnets and two containers filled with mercury.

In one of the containers, Faraday secured a bar magnet in an upright position and preserved a moving wire immersed in the mercury. When closing the circuit, electrical current was constituted and the mobile wire began to rotate around the magnetized bar. In the other vessel, Faraday preserved the fixed wire and the movable magnet. Thus, upon closing the circuit, the magnet began to rotate around the fixed wire. Faraday associated these movements with the action of the magnetic field.

The machines that transform electrical energy into rotational mechanical energy are called electric motors and with the inventives of the relationships between electricity, magnetism and motion, it was possible to make electric motors of direct and alternating current, single phase and three phase.