Among the products most requested by small, medium and large industries are undoubtedly the components of industrial machinery , in particular electric motors and reducers.
When purchasing these types of items online, it’s important to remember to rely on specialized retailers with long-standing and proven experience in the sector, such as UtensileriaOnline . This online shop offers a high-quality catalog with detailed descriptions of the technical characteristics of its numerous products, complete with photos and even suggestions for use.
Electric motor: the main types
An electric motor can be used on machines of various sizes, used in a wide variety of industries: from metallurgy to food processing, from leather processing to airport conveyor belts. Each motor will have different power, strengths, and characteristics.
Three-phase motors, for example, involve the rotation of three different magnetic fields that move at different times, making them particularly suitable for use with gearmotors. A gearmotor , thus recreated, moves various types of mechanisms thanks to its gears and is extremely versatile, as it can be installed on both heavy and lighter machinery. Furthermore, a three-phase electric motor can be either asynchronous or synchronous: the former, the most common, has a rotor that moves independently of the inductor’s magnetic field, unlike the latter, in which the two movements occur simultaneously.
Three-phase motors also include self-braking motors, particularly suitable for machinery used to lift or otherwise move loads. The ability to stop the motor quickly and precisely is crucial to ensuring operational safety. The brake consists of a disk that releases a negative electromagnetic current that activates when this type of motor is turned off.
In a single-phase motor, however, there is an alternating current that has only one phase. This type of motor is mainly found in smaller machines, such as drilling machines or ventilation systems, but also in office equipment, such as photocopiers. These motors are often equipped with cooling fans , although they can tolerate temperatures of several tens of degrees Celsius and, if well-built, also guarantee minimal vibration .
Among the most sought-after items purchased in conjunction with electric motors are accessories such as belt tensioners . These are housings for the belts, allowing the operator to tension and align them without having to completely disassemble the motor. Then, of course, there are also reducers , which allow the aforementioned gearmotors to be created.
Technical characteristics of an electric motor
As mentioned, the technical data sheet for each individual electric motor on UtensileriaOnline will be comprehensive enough to provide essential information regarding its specific features and safety levels. For example, the so-called insulation class indicates the maximum temperatures the motor can tolerate to ensure continued operation and failure. It is designated by a letter of the alphabet, and for each letter there is a thermal value that must not be exceeded.
For A, for example, it is 105 degrees Celsius, for B 130, and for F , the one that usually includes electric motors, 155. The IP protection rating , on the other hand, determines the safety of the external casing with respect to the possibility of foreign bodies penetrating. An IP followed by a zero means no protection, while if followed by numbers between 1 and 6, it guarantees barriers against solid bodies and dust. The second number refers to liquids and humidity, so an electric motor with an IP protection rating of 55 will not allow impurities or even strong jets of water to penetrate.
Furthermore, every electric motor will have to comply with the European ROHS Directive 2002/95/EC which prohibits or restricts the use of certain harmful materials in the construction of equipment, such as lead, mercury and cadmium.