Excellent article according to technical point of view sir thank you. A brushless DC motor (known as BLDC) is a permanent magnet synchronous electric motor which is driven by direct current (DC) electricity and it accomplishes electronically controlled commutation system (commutation is the process of producing rotational torque in the motor by changing phase currents through it at appropriate times) instead of a mechanically commutation system. There is no basic difference in the construction of a DC generator and a DC motor. Although there are different types of motors available, the basic principle and working methodology of all motors is almost the same. Why the D.C motors so common, when D.C power systems themselves were fairly rare? For this tutorial, we will be discussing only about the DC servo motor working. The working of the AC motor (Induction motor and Synchronous Motor) is different from the DC motor. However, for special applications such as in steel mills, mines, and electric trains, it is advantageous to convert alternating current into direct current in order to use dc motors. All conductors under North-pole carry currents in one direction while all the conductors under South-pole carry currents in the opposite direction. The DC shunt motor construction is the same as any type of DC motor.This motor can be constructed with the basic parts like field windings (stator), a commutator and an armature (rotor).. DC drive provides many advantages over AC drives, especially for regenerative and high power applications. Principle of operation of DC Motor: When current carrying conductor is placed in a magnetic field it experience a force. Objective Identify the components of an AC Motor and explain their function. The specific type of motor we are addressing is the permanent magnet brushed DC motor (PMDC). The motor features a permanent horseshoe magnet (called the stator because it’s fixed in place) and an turning coil of wire called an armature (or rotor, because it rotates).The armature, carrying current provided by the battery, is an electromagnet, because a current-carrying wire generates a magnetic field; invisible magnetic field lines are circulating all around the wire of the armature. This is how a DC motor works! Summary DC motor theory is summarized below. Several…, The losses in a dc machine (generator or motor) may be divided into three classes viz …, In this post, we will look into the characteristics of a DC series motor. Function of each part of DC Motor: Yoke: • It is outer cover of dc motor also called as frame. Your email address will not be published. Using the three-phase motor as shown in figure below, the process starts when current flows through one of the three stator windings and generates a magnetic pole that attracts the closest permanent magnet of opposite pole. Your email address will not be published. The DC motor is the device which converts the direct current into the mechanical work. If you would like to take a great deal from this piece of writing then you have to apply these techniques to your won blog. With increasing back emf armature current will start decreasing. DC Motor: motor that runs on direct current (DC) electricity. The speed and CEMF will continue to increase until the armature current and torque are reduced to values just large enough to supply the load at a new constant speed. DC Motor DC Motor theory The DC motor has two basic parts: the rotating part that is called the armature and the stationary part that includes coils of wire called the field coils. The stationary part is also called the stator. When the field coil is energized, it creates a magnetic field (excitation flux) in the air gap, in the direction of the radii of the armature. This is the basic theory by which all DC motors operate. When armature windings are connected to a DC supply, an electric current sets up in the winding. Read in Detail about the Construction of DC machines. An electric motor is an electrical machine which converts electrical energy into mechanical energy. It is just made up of a simple motor which runs through a servo mechanism. A DC motor may be thought of as a series of electromagnets, radially spaced around a common shaft: This particular motor is of the “ permanent magnet ” type, with wire windings only on the armature. Perpendicular to both the wire and the core, and the conductors located under the of. Only series field windings and commutator DC ) motor another major difference the... Consists of the back emf will also increase your name and student number top! 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