Dc machines | PPT
2. 3/23/2007 ELEC A6 DC Machine 2 DIRECT CURRENT (DC) MACHINES Fundamentals • Generator action: An emf (voltage) is induced in a conductor if it moves through a magnetic field. • Motor action: A force is induced in a conductor that has a current going through it and placed in a magnetic field • Any DC machine can act either as a generator or as a motor.
Topic :- Characteristics Of DC Motor
The load on the dc series motor is connected through the gears and not through the belt pulley arrangement.This is because, in case of failure of belt, the load will be removed from the motor and thereby the ... Download ppt "Topic :- Characteristics Of DC Motor" Similar presentations . Course Title: Theory of Electrical Machines. DC Motors ...
DC MOTOR
The Dc machines are of two types namely DC generators and DC motors. A DC generators converts mechanical energy into electrical energy whereas a DC motor converts the electrical …
Unit7-DC Motors | PDF | Electric Motor | Materials Science
Unit7-DC_Motors.ppt - Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online. The document discusses direct current (DC) motors. It begins by describing the construction of a DC motor, including its rotor, stator, commutator, and brushes. It then explains the principles of operation, discussing how an induced electromotive …
Dc Series Motor | PPT
6. Construction • Rotor is placed inside the stator and separated from it by small air gap and free to rotate. • Rotor is supported by the end cover on both side of the motor frame with the help of bearings. • Brushes feeds direct electric current in to the armature winding pressing on commutator segment.
Dc motor construction | PPT
A DC motor has two main parts - a static stator that houses field windings, and a rotating rotor. It converts direct current into mechanical rotation. The stator poles are fitted with field coils that produce magnetic poles of opposite polarity when current flows. The rotor has an armature winding and commutator that allow current to flow and ...
Ac and dc motors | PPT
3. induction process that is used to get the current into the rotating member is similar to the induction that occurs between the primary and secondary windings of a transformer Uses rotating field (rotor) and the stationary field (stator) AC motor requires less maintenance since it does not have brushes
Brushless DC Motors | PPT
The document provides details on the construction, working principle, speed-torque characteristics, and pros and cons of BLDCMs. Read less. Read more. 1 of 20. ... • The Permanent Magnet Brushless DC (PMBLDC) motor is able to overcome the limitations mentioned above and satisfy the requirements of a variable speed drive. 5.
DC Motor: Definition, Construction, Working, Types, and …
DC motor can be used at such places where speed control is required. That is why DC motors are often used in trolleys, electric train production systems, elevators, etc. DC Motor Definition. DC motor, also known as a direct current motor, is an electric motor that converts mechanical energy from the electrical energy of direct current. DC Motor ...
Drives lec 11_12_Braking of DC Motors | PPT
Remarks Regenerative braking cannot be used for DC series motor, because as the armature current reverses, the field also reverses, reversing E and causing a short-circuit condition. Regenerative braking can only be used when there are extra loads connected to the line and that their capacity is ≥ regenerated power. EEE-413N L-11 & 12 7 / 19
DIRECT CURRENT (DC) Motors.pptx
4. The Armature The armature of a motor is a cylindrical iron structure mounted directly on the motor shaft, as shown in Figure 2(B). Figure 2-(B). Armature In DC motors, the armature is the rotating component of the motor. Armature windings are embedded in slots in the surface of the armature and terminate in segments of the commutator.
Traction motor | PPT
TRACTION MOTOR (1) Description: The traction motor is a four pole DC series motor in which field winding is connected in series with armature. It is a forced ventilated machine arranged for axle mounting on sleeve bearing. Transverse movement is limited by the flanges of axle suspension bearing. An electric locomotive as well as diesel-electric ...
Permanent magnet brushless dc motors ppt | PPT
12. Mechanical commutator • The current crossing through the armature conductor setup an mmf along the axis A and B • The commutator rotates along the clockwise direction, now the brush A makes contact with CS2 and brush B with CS 8. • Now there are two parallel path 1 is 2-8 & parallel path 2 is 2-1-12-11-10-9-8. • Function of commutator and bush arrangement is to …
Starting methods of dc motors | PPT
12. 2 Point starter The start arm is simply moved towards right to start the motor. Thus, maximum resistance is connected in series with the armature during starting Then gradually decreased as the start arm moves towards right. This starter is sometimes also called as a 2 point starter. The no load release coil holds the start arm to the run position and leaves it when the …
DC MOTOR
•When the armature winding of a dc motor starts rotating in the magnetic flux produced by the field winding, it cuts the lines of magnetic flux. •Hence according to the faraday's laws of electromagnetic induction, there will be an induced emf in the armature winding.
PERMANENT MAGNET BRUSHLESS DC MOTOR | PPT
13. • The current crossing through the armature conductor setup an mmf along the axis A and B • The commutator rotates along the clockwise direction, now the brush A makes contact with CS2 and brush B with CS 8. • Now there are two parallel path 1 is 2-8 & parallel path 2 is 2-1-12-11-10-9-8. • Function of commutator and bush arrangement is to setup an armature …
Introduction To Motors
PPT slide on Introduction To Motors compiled by Yashaswini Pallet. ... DC MOTOR CHARACTERISTICS When power is applied, DC motors turn in one direction at a fixed speed. They are optimized to run at a fixed, usually high …
DC machines | PPT
It discusses the working principles, construction details, types of DC motors including shunt, series and compound motors. It covers key concepts such as EMF equation, back EMF, torque equation and characteristics of DC motors. It also discusses starters for DC shunt motors and speed control methods including flux and armature voltage control.
Motor DC | PPT
13. SELF EXCITED SHUNT • Pada motor shunt, gulungan medan (medan shunt) disambungkan secara paralel dengan gulungan dinamo (A) seperti diperlihatkan dalam gambar. Oleh karena itu total arus dalam jalur merupakan penjumlahan arus medan dan arus dinamo. • Kecepatan pada prakteknya konstan tidak tergantung pada beban (hingga torque tertentu setelah …
Dc shunt motors; construction and working | PPT
6. DC Shunt Motors Construction • Rotor is placed inside the stator separated by small air gap and free to rotate. • Rotor is supported by the end cover on both side of the motor frame by the help of bearings. • Brushes feeds …
Electrical ac & dc drives ppt | PPT
Electrical ac & dc drives ppt - Download as a PDF or view online for free ... This document discusses electric drives and AC motor drives. It defines electric drives as systems that use 50% of electrical energy produced and can operate equipment at constant or variable speeds. The main components of electric drives are motors, including DC and ...
Unit 2 -DC Motors ocnstruction and working.ppt
Unit 2 -DC Motors ocnstruction and working.ppt - Download as a PDF or view online for free. ... 44 Q1 A 240V dc shunt motor has armature and field resistances 0.2 and 320 respectively. The motor drives a load at a speed of 950 rev min-1 and the armature current is 50A. Assuming that the flux is directly proportional to the field current ...
PPT
A DC machine (12 kW, 100 V, 1000 rpm) is connected to a 100 V DC supply and is operated as a DC shunt motor. At no-load condition, the motor runs at 1000 rpm and the armature current takes 6 A. Given armature resistance Ra= 0.1, shunt field winding resistance Rfw= 80, and Nf= 1200 turns per pole.
Construction of a dc machine | PPT
• In case of a dc motor, commutator helps in providing current to the armature conductors. • A commutator consists of a set of copper segments which are insulated from each other. • number of segments = number of armature coils. • Each segment is connected to an armature coil • Commutator is keyed to the shaft.
Dc motor | PPT
A DC motor runs on direct current electricity. It has a field winding that produces a magnetic field when energized, and an armature winding that rotates when placed in this magnetic field. 2. The key parts of a DC motor …
Differences between dc and ac motors …
11. SIMPLE AC MOTOR • One of the main difference a AC motor has from a DC motor is that an AC motor has a slip ring commutator which allows the current to continuously change direction in the coil of the ac motor. • …
ppt on dc motor | PPT
4. DC motor is an electric motor that runs on direct current (DC) electricity. Two types of DC motor - brush and brushless DC Motor. Brushed DC electric motor generates torque directly from DC power supplied to the motor by using internal commutation, stationary magnets (permanent or electromagnets), and rotating electrical magnets. Brushless DC motors use a …
Construction of dc machines | PPT
The document describes the main construction of DC machines. It lists the two major parts as the stator, which houses the field winding, and the rotor, which rotates in the magnetic field. It then describes the other key parts which include the yoke, poles, field winding, armature winding, commutator, and brushes.
Dc Motor | PPT
8. armature The armature is typically a soft iron drum mounted on the motor shaft, with the armature conductors set axially into the surface of the drum. Also mounted on the armature shaft are the commutator segments, to which the armature conductors are connected. The armature shaft is mounted in ball bearings at each end, the bearings being held in the …
PPT – DC MOTOR PowerPoint presentation | free to …
Brushless DC Motor Market Size- KBV Research - The Global Brushless DC Motor Market size is expected to reach $22.8 billion by 2025, rising at a market growth of 6.7% CAGR during the forecast period. The high adoption rate of electric vehicles arising from rising oil dependency issues, global warming, and environmental pollution is also likely ...