Electric motors are basically made up of a set of parts mounted on a metal housing.
An important part of an electric motor is the field coil, which is attached to the housing inside the motor. This coil can be a magnet or an electromagnet. Powered by electric current, the field coil generates a magnetic field around the winding. If we have a natural magnet this field will exist around the induced. Another important piece is the armature, which is the central axis of the engine.
Through graphite brushes that slide into the armature collector there is a current flowing through the armature winding, which creates another magnetic field. The fields of the field coil and the armature combine, attracting and repelling, then, supported in bearings, the armature begins to rotate.
Electric motors work this way and can be applied to various devices in the car. One of the ends of the armature may either contain a gear for locking a lock, such as containing a pulley or a coupling for engaging the combustion engine, and having a propeller for an internal fan or rotating a mechanism for cleaning the glass for breeze.
Before you buy an electric motor it is important that you know what model will fit your needs. That’s because in the market there are many different options and we need to know which one is indicated for what you need. In the market we can find models of electric motors in the three-phase segment and also single-phase, the implementation of each engine undergoes changes.
The electric motor deployment is done by professionals who are specialized in the field. These professionals do the installation of the engine which is a simple procedure but that requires attention and some details. It is very important to make this process available to a company that really understands it. here for more skf bearing
The electric motor has the function of transforming electrical energy into mechanical energy. This transformation is made on the basis of the principles of electromagnetism. The economy and efficiency are two very important factors for the engine to continue serving several segments.
The electric motor of direct current works based on the principle of reaction of a conductor that is placed in a fixed magnetic field and that is covered by an electric current.
The interaction that occurs between the fixed magnetic field and the magnetic field that is produced by the current that surrounds the conductor is responsible for the occurrence of a force that will circulate in the conductor of the electric motor. This force will drive the conductor out of the fixed magnetic field and thus the motion will be produced.
The electric motor skf qj 308 ma of direct current also has a magnetic field that is formed by the field coils. There are conductors that are installed in this field, in the rotor, and that are driven by electric currents.
The current flowing through the rotor loop of the electric motor moves in two directions, because to one side, the current enters and by the other, it leaves. This causes the formation of two opposing forces, but of equal value, and the result of this will be a conjugate rotation, since the loop is attached to the armature or to the rotor and suspended by a bearing.
Electric motor may suffer from: low insulation resistance or bearing heating / motor overheating
The electric motor can present many problems and these problems appear in the most diverse parts of the electric motor in a common way, because it is a machine that is operating in an interrupted way.
When the electric motor exhibits low insulation resistance changes, it means that the electric motor may be with damaged groove insulation; The cabins may be cut; The bobbin head may be contacting the casing; There may be presence of moisture or chemical agents or even presence of dust on the winding.
Overheating of the electric motor or heating of the bearings may occur due to: excessive axial or radial stress of the belt; Bent shaft; Loose or decentralized covers; Lack or excess grease; Foreign matter in the grease; Obstructed ventilation or have a smaller fan; The voltage or frequency may be out of specification; The rotor is crawling or failing; The stator is without impregnation; The overload; The bearing defective; Consecutive games; Air gap below specified; The capacitor remains unsuitable or improperly connected. https://www.mrosupply.com/hydraulics-and-pneumatics/hose-reels/2516639_ez-sh-550_coxreels/
The alternating current electric motor has as its principle the magnetic flux both in time and space (sinusoidal), so as to produce a force in the air gap and this causes the rotor to rotate with defined torque.
By analyzing the loss equations, it is necessary to verify that there are ways to reduce the magnetic losses in the electric motor and this can decrease both losses through hysteresis and dynamic losses.
The reduction of this hysteresis loss in the electric motor involves metallurgy and materials, but there are processes in the production of electric machines that have a direct influence on the loss as the stamping of the blades, the heat treatment, the pressure exerted on the blades and many others.
When losses in the electric motor skf 61905 2rz are called dynamic losses, you can reduce reducing the thickness of the blade or even increasing the electrical resistance of the electric motor by incorporating silicon into the steel. When all these factors are optimized, all that remains is to improve all the details that are considered constructive in the electric motor.