DC Machines and Their Applications


A DC contactor is also known as a DC machine. It is classified into two primary types- the DC motor and then the generator. Most of the machines are similar to AC machines since they have the AC currents and AC voltages within. The output of a DC machine converts the AC to DC voltage. Usually, the conversion of the mechanism is ideally identified as the commutator.

For that reason, these machines are also named commutating machines. DC machines are often used as motors. The primary benefits of a DC machine entail torque regulation and easy speed.  

The design of a DC motor coupled with its generator is similar in different ways. Usually, the generator is protected before being employed to use it. There is, therefore, going to be an open construction type. However, the motor will be used in the same location where there is some exposure to dust, as well as other impurities such as moisture. Some form of enhancement is needed so that the enclosure is appropriately contained.  

The battery is a critical source of DC’s electric power. It can only supply limited power to machines. Some applications, in which large volumes of DC power are needed, include electrolysis and electroplating and are crucial when it comes to the purchasing process of a DC. That is why DC generators are often used in the delivery of power.  

The Basic Structural Nature of DC Machines

DC’s rotating electrical machine comes with two major parts- there is the Stator and the Rotar. Usually, the parts are primarily separated using an air gap. The Stator refers to the outer frame of the DC machine. It is immovable. On the other hand, the rotor refers to the inner parts of the machine.

The two elements are constructed using ferromagnetic materials. Some slots will be cut in the inner and outer periphery of the Stator.

Conductors are then placed in the Stator’s slots. These parts are interconnected in a way that can form windings.

Usually, the windings of the voltage are called Armature windings, through which the current of the machine is passed in order to produce the flux, which is known as the Field winding. In order to provide some flux into the machine, permanent magnets are used.

Equivalent Circuit

A DC’s armature can easily be represented using the equivalent of the electrical circuit. It can also be represented using three series-connected components, known as Ra, Vb, as well as E.

The design and construction of a DC machine may be successfully achieved using essential parts such as Pole Core, Pole Coil, as well as a Field Coil.

Final Thoughts

The primary functions of a DC generator include converting mechanical power into DC electrical power. In this case, the DC motor will easily convert the DC power into your preferred mechanical power.

AC’s motor is then frequently used in typical industrial applications when it comes to altering the electrical energy into mechanical energy. But a DC machine is only applicable where good speed regulation coupled with an ample range of different speeds is essential to the transaction systems.


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