construction of dc machine

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  • Construction of DC Machine (Generator & Motor)

     · The dc generators and dc motors have the same general construction. In fact, when the machine is being assembled, the workmen usually do not know whether it is a dc generator or motor. Any dc generator can be run as a dc motor and vice-versa. Read: Working of DC Motor. All dc machines have five principal components.

  • DC Motor Introduction, Principle and Working

     · A machine which transforms the DC power into mechanical power is called as a DC motor. Its operation relies on the principle that once a current carrying conductor is placed in a very magnetic field, the conductor experiences a mechanical force. The direction of this force is given by Fleming''s left hand rule and magnitude is given by; F=BIl ...

  • Construction of DC generator | Direct current machine ...

     · The principle of single loop DC generator has been described for the basic understanding of DC generator working. Now we will discuss the construction and working of actual generator. The construction of DC generator and DC motor is same therefore instead of DC generator let say DC machine which is more appropriate and cover all aspect of DC motor and DC generator construction.

  • Construction of DC Machines

     · Construction of DC Machines. In the structure of DC machine either dc motor or generator, there are 2 main parts first one is the static or the second one is moving. The static part is stator and moving part is rotor. In stator of dc machine…

  • Types of DC Generator

    Please go through the construction of dc generator before reading this article about different types of dc generator.. A DC generator requires MMF to establish flux in its magnetic circuit. The MMF necessary to establish flux in the magnetic circuit of a dc generator is obtained by field excitation.

  • Brushless DC Motor

     · Advantage of BLDC Motor: Compared with a brushed DC motor or an induction motor, the BLDC motor has many advantages: Higher efficiency and reliability. Lower acoustic noise. Smaller and lighter. Greater dynamic response. Better speed versus torque characteristics.

  • Understanding DC Motor Operation Modes and Speed ...

     · Unlike AC motors, DC motors operate on DC power–non-sinusoidal, unidirectional power. Basic Construction. Although DC motors are designed in various ways, they all contain the following basic parts: Rotor (the part of the machine that rotates; also known as the "armature") Stator (the field windings, or "stationary" part of the motor)


    II. Demonstrate the working principle of different types of dc machines and transformers. III. Analyze the losses in dc machines to improve the efficiency by conducting various tests. IV. Outline the principle of operation, construction and testing of single phase transformers. UNIT-I

  • Construction and Principle of Operation of the Shunt DC ...

     · The DC Shunt-wound motor, running on Direct current, has its field windings placed in parallel to the armature. In Electrical terms, parallel is generally denoted as shunt. That is the reason behind naming it a DC Shunt motor. Same voltage is applied to both shunt winding and armature in this motor. This parallel configuration allows independent path of current for field winding and armature.


    • For a DC MOTOR, the efficiency is the electrical output power divided by the mechanical input power, or • For a DC GENERATOR, the efficiency is the electrical output power divided by the mechanical input power, or • Note that the efficiency of a DC machine will vary with the …

  • Differentiating Between DC and AC Motors | EC&M

     · Compound machines can be further classified as cumulative and differential. Cumulative and differential machines can be further classified as long shunt and short shunt. As you can see, there are a variety of electrical configurations for a DC machine. For the purpose of this article, we will stick with the series- and shunt-wound DC motor.

  • DC Generator-Working principle and Construction ...

     · DC Generator Generator principle. An Electric generator is a machine that converts mechanical energy into electrical energy. It is based on the principle that whenever flux is cut by a conductor, an emf is induced which will cause a current to flow if,the conductor circuit is closed.

  • Commutator

    Construction of a Commutator. ... In a DC machine, each armature coil contains two commutators attached to its end. The commutator segments and brushes should maintain a continuous moving contact for the better transformation of the current. More than one coil is used in DC machines …

  • Construction of DC Generator | Yoke Pole Armature Brushes ...

     · But for large construction of DC generator, where weight of the machine is concerned, lighter cast steel or rolled steel is preferable for constructing yoke of DC generator. Normally larger yokes are formed by rounding a rectangular steel slab and the edges are welded together at the bottom.

  • Purpose of Interpole in DC Machine | Electrical Concepts

     · Interpoles are narrow poles placed at the GNA and fitted to the Yoke and also known as Commutating Poles or Compoles. For generator, the polarity of Interpoles must be same as that of main Pole ahead of it in the direction of rotation. For Motor, the polarity of Interpole must be same as that of Main Pole behind it.

  • Construction of DC Machine

     · Construction of DC Machine. DC machine is actually an alternating current machine, but furnished with a special device, called the commutator, which under certain conditions converts ac into dc and vice-versa. Inspite of the fact that the commutator has made the operating condition of a dc machine complicated, it is a highly versatile energy ...

  • DC motor

    The DC motor was the mainstay of electric traction drives on both electric and diesel-electric locomotives, street-cars/trams and diesel electric drilling rigs for many years. The introduction of DC motors and an electrical grid system to run machinery starting in the 1870s started a new second Industrial Revolution.


    DC Generator converts the Mechanical Energy into Electrical Energy (in DC). Its working principle is Faraday''s Law of Electromagnetic Induction which states that, whenever a conductor is placed in a varying magnetic field (or conductor is moved in magnetic field), then an emf is induced in it.If the circuit of the conductor is closed, then current also starts flowing through it.

  • DC Motors

    DC Motors Although ac motors are used in most of the cases, DC motors have many applications and used for multi-purpose applications. DC Motor Principle A machine that converts dc power into mechanical energy is known as dc motor. Its operation is based on the principle that when a current carrying conductor is placed in a

  • What is a DC Machine? Basic structure & Equivalent circuit ...

    A DC Machine is an electro-mechanical energy conversion device. There are two types of DC machines; one is the DC generator, and another one is known as DC motor. A DC generator converts mechanical power (ωT) into DC electrical power (EI), whereas, a DC motor converts d.c electrical power into mechanical power.


    University of Babylon Electrical machines mechanical department U1.3 Construction of DC Generators The parts of a simple DC generator are shown in fig.(1.3). The principle of operation of a DC generator is similar to that of the AC generator, which was discussed previously. A rotating armature coil

  • Working Principle of DC Motor | Robu

     · A DC motor is an electrical machine which converts electrical energy into mechanical energy. The basic working principle of the DC motor is that whenever a current carrying conductor places in the magnetic field, it experiences a mechanical force. Fleming''s left-hand rule and its magnitude decide the direction of this force.

  • Three-Phase Synchronous Motor | Construction | Working ...

    If the DC excitation is increased, the induced voltage V g increases (see Figure 3(c)). The line current I 3 will therefore lead the applied voltage V by Φ 3, and will also be greater than I 1 in Figure 3(a) because the power component is the same, owing to the load remaining constant.

  • DC Machines

    DC Machines Construction The stator of the dc motor has poles, which are excited by dc current to produce magnetic fields. In the neutral zone, in the middle between the poles, commutating poles are placed to reduce sparking of the commutator. The commutating poles are supplied by dc current. Compensating windings are

  • DC Machine: Basic Components and Function | EE Power School

     · A DC machine that produces electricity by consuming mechanical energy is a generator. A DC motor that consumes electricity to create mechanical energy is a motor. The same basic DC machine can be either a motor or a generator. Essential Components of a DC Machine. DC machine either uses or produces electrical energy.

  • Working Principle of DC Motor

     · There is no basic difference in the construction of a DC generator and a DC motor.. In fact, the same DC machine can be used interchangeably as a generator or as a motor. Like generators, there are different types of DC motors which are also classified into shunt-wound, series-wound and compound-wound dc motors.. DC motors are seldom used in ordinary applications because all …

  • DC Motors vs. AC Motors (The Ultimate Difference) | MachineMfg

    DC Motor. The DC power supply current flows along the positive pole of the power supply to the left side of the brush. The brush and the commutator rub against each other. The current flows through the left commutator (which has two left and right commutator segments) that flow into the coil and flow out from the right side of the coil.

  • DC Machine

     · Construction of DC Machine Yoke. Another name of a yoke is the frame. The main function of the yoke in the machine is to offer mechanical support intended for poles and protects the entire machine from moisture, dust, etc. The materials used in the yoke are designed with cast iron, cast steel otherwise rolled steel. ...


    OF SYNCHRONOUS MACHINES The synchronous electrical generator (also called alternator) belongs to the family of electric rotating machines. Other members of the family are the direct-current (dc) motor or generator, the induction motor or generator, and a number of derivatives of all these three. What is common to all the members of this fam-

  • Construction of dc machines

     · Construction of dc machines 1. Construction of DC machines By, Rohini Haridas Assistant Professor, Dept of Electrical Engineering, SSGM College of Engineering,Shegaon 2. Is DC generator and motor have same construction??? 3. Main construction diagram 4. Main parts The two major parts required for construction : 1.

  • DC Machine

    Construction of DC Machine. The DC machine consists of Yoke, Pole, and Pole shoe, Armature core, Field Winding, Armature Winding, Commutator, Brushes, shaft, and Bearings. Let''s explain each part in detail with applications. Yoke or Frame. The yoke is also known as the frame.

  • Construction of DC Motor (Parts & Images) | Electrical4U

     · Construction of DC Motor (Parts & Images) A DC motor is a device that converts direct current electrical energy to mechanical energy (learn about a DC motor''s working principle ). A DC motor is constructed with: A stator is the static part of the DC machine that houses the field windings and receives the supply.

  • EE 340 Spring 2011

    Construction of synchronous machines Two common approaches are used to supply a DC current to the field circuits on the rotating rotor: 1. Supply the DC power from an external DC source to the rotor by means of slip rings and brushes; 2. Supply the DC power from a special DC power source mounted directly on the shaft of the machine.

  • Physical Structure and Configuration of DC Machines

    Direct Current Motor (Rotor, Startor) A representative DC machine was depicted in Figure 0 above, with the magnetic poles clearly identified, for both the stator and the rotor.. Figure 1 is a photograph of the same type of machine. Note the salient pole construction of the stator and the slotted rotor. As previously stated, the torque developed by the machine is a consequence of the magnetic ...

  • What is AC Motor

     · The machine that turns the class of input electrical form to an output mechanical form. Here, in this type of machine, the input given to the field winding is alternating. Hence, the name AC motor. The supply given to the field winding classifies its type whether it is AC or DC type machine. Construction of AC Motor

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