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The armature winding of a dc machine is a closed-circuit winding; the conductors being connected in a symmetrical manner forming a closed-loop or series of closed loops. Depending upon the manner in which the armature conductors are connected to the commutator segments, there are two types of the armature winding in a DC machine viz., ...
EXPERIMENT:01 Aim: Constructional study of DC Machine Parts Apparatus: Cut-section model of DC machine Rationale: Introduction: A D.C. machine is a device that converts Mechanical energy into Electrical energy and vice-versa. When the device acts as a generator, the mechanical energy is converted into electrical energy.
3. 3/23/2007 ELEC A6 DC Machine 3 DC Generator Fundamentals ( )e e B v = × ⋅ = v B l l sin cosα β α - angle between the direction in which the conductor is moving and the flux is acting. β - smallest possible angle the conductor makes with the direction of, the vector product, ( v × B) and for maximum induction, β = 0. Hence, e = Blv for most cases.
The voltage generated in the armature winding of a DC generator is alternating because it is placed in a rotating magnetic field. Commutation in a DC machine, especially in a DC generator, is the process that converts this alternating current into direct current using the commutator and stationary brushes. In a DC Motor, the input direct current (DC) is converted …
57. Applications of DC Motors • DC shunt motor are used where speed has to maintain nearly constant with load and where a high starting torque is not required. Thus shunt motors may be used for driving centrifugal pumps and light machine tools, wood working machines, lathe etc., • Series motors are used where the load is directly attached to the shaft …
Previous Year Question for GATE | DC Machines. Types of Transformers; Excitation Systems for Synchronous Machines ; You May Also Like. Sulphur Hexa Fluoride Circuit Breakers July 19, 2024 MADE EASY 0. Power Electronic Applications July …
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 …
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Explore the virtual lab for constructing DC circuits with interactive simulations and intuitive controls.
Construction of DC Machine - Free download as Word Doc (.doc / .docx), PDF File (.pdf), Text File (.txt) or read online for free. All DC machines have five main components: a magnetic frame, pole cores and shoes, field coils, an armature core, armature winding, commutator, and brushes/bearings. The magnetic frame provides mechanical support and carries magnetic flux.
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Our 1000+ DC Machines MCQs (Multiple Choice Questions and Answers) focuses on all chapters of DC Machines covering 100+ topics. You should practice these MCQs for 1 hour daily for 2-3 months. This way of systematic learning will prepare you easily for DC Machines exams, contests, online tests, quizzes, MCQ-tests, viva-voce, interviews, and ...
List Of DC Machine Interview Questions Q: What are the essential parts of DC machine? 1. Magnetic frame or yoke 2. Poles 3. Armature 4. Commutator 5. pole shoes 6. armature windings 7. interpoles 8. Brushes 9. bearings 10. shaft Q. What is the purpose of yoke in d.c machine? 1.It acts as a protecting ...
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DC Machine - Construction, Working, Types, EMF Equation & Applications - Free download as PDF File (.pdf), Text File (.txt) or view presentation slides online.
The developed model for the d-c machine given in Sec. 4.3 (Table 4.3.1, Part 3) is given a more complete characterization in Figs. 4.10.1 through 4.10.4. What is by convention termed the "field" winding is on the …
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DC Waveform. The ripple in the DC waveform can also be improved by adding more poles. More poles also provide a stronger field, and therefore a higher induced voltage. DC Generator with 4 Poles DC Generator Construction …
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So, these machines are used at a place where there is a requirement of single directional power. These machines are used in batteries to generate unidirectional power. This article gives an overview of a DC …
On large DC machines, the pole-face is typically bolted on to allow easier installation and replacement of the field coil. Figure 8 Stator (field) lamination of a DC machine. Figure 9 shows a cutaway view of a wound- field DC machine. The field coil at the front of the machine has been cut and the ends of the coil can be seen surrounding the pole.
Explanation: Brushes in a DC machine are normally placed electrically in the interpolar regions and therefore make an angle of 900 electrical with the axes of adjoining filed poles. 5. In a DC machine, rectification process is carried out in order to get unidirectional output (DC). This rectification process is carried out by _____
A pole of a dc machine is a supporting structure to electromagnet. The field winding is wound over the poles. Poles produce the magnetic flux when the field winding is excited by DC supply voltage. Pole shoe is an extended part or shower like structure of a pole. Due to its typical shape, it enlarges the area of the pole.
Key learnings: DC Motor Definition: A DC motor is defined as a device that converts direct current electrical energy into mechanical energy.; Stator and Rotor: The stator is the stationary part with field windings, and the …
The purpose of the rotor is to provide the rotating element in a DC machine (refer to Figure 2). In a DC generator, the rotor is the component that is rotated by an external force. In a DC motor, the rotor is the component that turns a piece of …
Although some DC machines have a permanent-magnet field, the overwhelming majority use coils to create the field. Figure 5 is a sketch of the construction of a DC machine. The field …
The main parts of DC Machine (motor or generator) are as follows: Yoke; Pole core and pole shoes; Pole coil and field coil; Armature core; Armature winding or conductor; Commutator; Brushes and bearings
Each DC machine contains two separate terminals with a magnetized center between them. There are two main parts, the stator and the rotor. The stator contains parts such as brushes, magnets and housing for the …
A Yoke. Poles. Field windings. Armature windings. Commutator. Brushes. A stator is the static part of the DC machine that houses the field windings and receives the supply. A rotor is the rotating part of the DC …