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Maintenance

Maintenance is an expensive and complex cost source and as such needs to be well managed. Its activity within an operating system is of fundamental importance for the production and the final quality of the product.

Electric motors are responsible for much of the energy consumed in the industries where it is most effective, where they account for more than 50% of the electricity consumption of these facilities on average. They are, therefore, https://www.mrosupply.com/motors/dc-motors/2526812_17410700_leeson/ equipments on which it is necessary to look like priority, the energy saving.

Every operating system has an estimated lifetime and the probability of this system failing rises with the reduction of its life time. In this way it is essential to have a reliable maintenance program to act simultaneously with the production process, reducing the likelihood of production system downtime.

In electric motors the operations of control of materials and equipment have a direct effect on the mechanical and electrical study of these equipments, acting directly or indirectly on their gains. Actions should be presented which, if adopted by the maintenance technicians, will result in the improvement of the performance of the existing motors in its facilities, providing electrical energy savings.

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Dimensioning Considerations – DC Motor

In order to design an electric motor of direct current, a complete study will be necessary, in a clear way with regard to the environment in which the equipment will be used. If a DC motor has to fit into a space or adjust a weight requirement, then the physical characteristics may be important factors in the selection. The configuration of the shaft and the reducer, if applied, are also considerations that should receive attention.

The configuration of the axis of origin as the motor is assembled and connected to the system that it will trigger and its correct selection is essential, so that it is compatible with the system. The optimum shaft selection increases efficiency and can save time and cost during assembly. https://www.mrosupply.com/lighting/lighting-fixtures/lighting-fixture-accessories/1432778_vxcb_rab-lighting/ Configurations may contain concave, round, square, hexagonal, slotted, stepped, or bolted types. The reduction or reducer is used in the DC motor to increase or reduce the speed of the shaft mechanically. Using the gear unit, the motor will have a smaller volume or weight. The types of gearboxes that are used in DC electric motors may include gearboxes, planetary gearwheels, or worm gearboxes.

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Induction Motor – Theoretical Basis

The principle of operation of the electric induction motor is essentially composed of a permanent magnet suspended by a wire on an aluminum or copper disk in a bearing on a fixed iron plate. The induced parasitic currents tend to produce a unitary pole S (south) on the disk at a point located under the magnet’s north (N) rotating pole, and a unit pole N on the disk under the magnet rotating pole S. The disc turns in the same direction as the magnet, but the speed must always be lower. If the disk were activated at the same magnet speed, there would be no relative motion between the conductor and the magnetic field and the induced current would be zero and no magnetic flux or torque would be given. Coxreels 112-3-100

 

The field of the permanent magnet is completed through the iron plate and the disk follows the movement of the magnet due to the induced parasitic currents that appear because of the relative movement of the conductor relative to the magnetic field. By Lenz’s law, the sense of induced voltage produces a field that tends to oppose force, that is, the motion that produced the induced voltage.