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The universal motor is a type of electric motor that can operate both with direct current and with single-phase alternating current.
Its constitution is similar to that of a direct current series motor, although with some modifications:
The polar nuclei, and the entire magnetic circuit, are built with silicon iron plates isolated and stacked to reduce energy losses by parasitic currents. These currents occur because of magnetic flux variations when connected to an alternating current network.
It has a lower number of turns in the inductor to not magnetically saturate the core and thus reduce the losses by eddy currents and hysteresis, increase the current intensity…
Last review: April 9, 2019
Steam engines are used to power a wide variety of self-transport applications. These are a few examples:
Within stationary steam engines we can sub-classify into two main types:
- Steam engines with frequent stops and changes of direction: rolling rolls, steam mules, marine engines and similar applications.
- Steam engines that give power. These types of engines rarely stop and do not need changes of direction. This type includes the engines that are used in thermal power plants, nuclear power plants and those that were used in pumping stations, mills, factories and to power trains and trams before the widespread use of electricity.
Steam mules are technically stationary engines, although they are mounted on skids and can be transported. They are designed for…
Last review: March 21, 2019
The uses of the steam engine have been changing with the passage of time.
Initially, since the early eighteenth century, steam engines have been used to power a multitude of uses. At first, the steam engine was used as a piston pump. A piston pump is a hydraulic pump that generates movement in it by the movement of a piston.
Subsequently, from the years 1780 began to appear alternative engines. With the alternative motors a new use of the steam engine appears: to give power to the factories and to the industrial one. At the beginning of the 19th century, steam engines began to be used in transport by land and sea. Uses of the steam engine in the Industrial…
Last review: March 18, 2019
Traditionally, when we talk about motors, we usually refer to internal combustion engines or electric motors. However, there are other types of motor. Among these types of motor there are the physical power motors.
The so-called physical power motors are motors that take advantage of the kinetic energy or the potential energy of some element.
An example of power motors is found in hydro power plants. In this type of installation the potential energy of the water is used, which, when it falls, becomes kinetic energy and activates a turbine. In this way, a motor, in this case a generator, performs an energy transformation: from kinetic energy to electrical…
Last review: December 5, 2018
A motor or motor is a machine designed to convert a form of energy into mechanical energy . An engine can be classified into a category according to two criteria: the form of energy it accepts to create movement and the type of movement it produces.
As a general rule, engines have an axle, which in rotary offset and through mechanical devices such as drive gears. The exceptions are rocket motors and linear motors . Nowadays, combustion engines and electric motors are of the utmost importance.…
Last review: November 30, 2018
The Joule effect, also called Joule's law, is the thermal manifestation of electrical resistance. If electricity circulates in an electric conductor, a part of the kinetic energy of the electrons is transformed into heat due to the shock that the electrons experience with the molecules of the conductor through which they circulate, which increases the temperature of the conductor. It is named in honor of the English physicist James Prescott Joule.
Definition of the Joule effect:
The amount of heat energy produced by an electric current is directly proportional to the square of the intensity of the current when it is flowing through the conductor and to the resistance that this…
Last review: November 28, 2018
The series motor is a type of electric direct current motor in which the armature and the inductor debited or excitation are connected in series. That is why the excitation current or the inductor is also the current of the induced absorbed by the motor.
This type of direct current motor is also called the series excitation motor. The constitution of the electric motor in series is that of having all the elements of the circuit in series, induced windings and inductors. The series engine is characterized by having a high moment of rotation at start-up and its speeds very variable depending on the load, making it an unstable motor.
This is the type of engine used in applications…
Last review: November 28, 2018
Foucault currents are the currents induced in masses of conducting metal that are immersed in a variable magnetic field or that, in motion, through a constant or variable magnetic field. In any case, it is the variation of the magnetic flux that generates these currents. The phenomenon was discovered by the French physicist Jean Bernard Léon Foucault in 1851.
In high frequency: using cores with magnetic materials that have low electrical conductivity (such as ferrite).
Foucault currents create energy losses through the Joule effect. More specifically, these currents transform useful forms of energy, such as kinetics, into unwanted heat, so that it is generally a useless,…
Last review: November 27, 2018
A direct current motor (DC motor), or simply a continuous motor or direct current motor, is a rotating electric malternating currenthine that transforms electrical energy in the form of direct current into mechanical energy through electromagnetic interalternating currenttions.
Virtually all electric motors are reversible, that is, they can transform mechanical energy into electrical energy functioning as dynamos. direct current motors base their operation on the Lorentz law, also called Laplalternating currente's law when it is applied to a conductor, as is the case of motors. Applications of direct current electric motors
Direct current electric motors are especially…
Last review: November 26, 2018
The electric motor is an electrotechnical machine that converts electrical energy into mechanical energy. That is, when the electric motor is connected to the proper power source, it begins to rotate, which also begins to rotate the machine or the machine associated with it. That is, it works inversely to the electric generator, which produces electrical energy with mechanical energy.
The electric motor was made possible thanks to the discoveries of Franz Ernst Neumann and James Clerk Maxwell. His discoveries were published in the years 1841 and 1873.
The electric motors can be distinguished between them according to the type of power supply:
- DC electric motors.…
Last review: November 23, 2018