What are the electric motors?
Electric motors are machines that are responsible for converting electrical energy into mechanical energy through the action of the magnetic fields produced by its coils.
They can be divided into three main groups: -Direct current motors -Alternating current motors -Universal motors
Motor in series
In this type of electric motor, the armature and the inductor are connected in series. Its voltage is constant and the excitation field increases with the load since the current is the same as the excitation current. It is characterized by maintaining a constant power at any speed.
This electric motor contains two inductor windings, one placed in series and the other in bypass with the circuit, which are the ones that produce the excitation. They are used when a stable response is required for a wide speed range. compound motorcompoundShunt motor
For its part, this device has its inductor connected in parallel with the circuit made up of the induced windings. It has a high resistance thanks to the characteristics of its coils and they are the most suitable when constant speed is required.
Brushless electric motor
The popular brushless motor does not use brushes to effect polarity change on the rotor. They are one of the most common today because they are cost-effective, lightweight and do not require much maintenance.
Within direct current electric motors, we can also identify other types that are commonly used in the field of electronics:
This motor is capable of transforming a series of electrical impulses into discrete angular displacements, that is, it progresses a series of degrees depending on its control inputs. It stands out for its precision.
This device has the ability to position itself in any position within its operating range and remain stable in that position.
Electric motors with electric current operate with electric current thanks to the forces of rotation through the mutual action of magnetic fields.
They are classified into two classes:
In this device, the speed of the magnetic field produced by the stator exceeds the speed of rotation of the rotor.
Synchronous motors are characterized in that their speed of the stator magnetic field is equal to the rotational speed of the rotor
These electric motors are capable of operating in both AC and DC. They have a lower number of turns in the inductor so as not to magnetically fill its core and reduce losses due to eddy currents and hysteresis, as well as a greater number of turns in the armature to balance the decreased inflow due to the lower number of turns. of the inductor.