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.
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A DC machine is an electromechanical device that is used to convert electrical energy into mechanical energy or vice versa. The DC machine used to convert electrical energy into mechanical energy, which is known as DC motor and the DC machine used to convert mechanical energy into …
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— DC motors and AC motors accomplish this task in different ways. DC machines can be classified as self-excited, separately excited, permanent magnet (PM), and brushless. Self-excited machines can be further classified as shunt, series, and compound. Compound machines can be further classified as cumulative and differential.
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DC motors are also mainly of two types – DC motors with brushes and DC motors without brushes. 3: Current Input: AC motors only run when an alternating current is given as input. DC motors will only run when a DC supply is given. In the case of an DC series motor, the motor might run with an AC supply.
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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 equipment. In both types of DC machines, the rotor is the armature. Stator
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A DC generator converts mechanical power (ωT) into DC electrical power (EI), whereas, a DC motor converts d.c electrical power into mechanical power. The AC motor is invariably applied in the industry for conversion of electrical power into mechanical power, but at the places where the wide range of speeds and good speed regulation is required ...
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Experiment with an electronics kit! Build circuits with batteries, resistors, light bulbs, and switches. Determine if everyday objects are conductors or insulators, and take measurements with an ammeter and voltmeter. View the circuit as a schematic diagram, or switch to a lifelike view.
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The above figure shows constructional details of a simple 4-pole DC machine. A DC machine consists of two basic parts; stator and rotor. Basic constructional parts of a DC machine are described below. Yoke: The outer frame of a dc machine is called as yoke. It is made up of cast iron or steel. It not only provides mechanical strength to the ...
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The construction of DC machine can be done using some of the essential parts like Yoke, Pole core & pole shoes, Pole coil & field coil, Armature core, Armature winding otherwise conductor, commutator, brushes & …
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— A DC Machine is an electro-mechanical energy conversion device. There are two types of DC machines; one is DC generator, and another one is known as DC motor.
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— 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.
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— This Article Discusses an Overview of What is a DC Machine, its Construction, Working, Diagram, Armature Reaction, Types & Applications.
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Build and test your own DC circuits with this online simulation. Use batteries, resistors, bulbs, switches and more. Learn how to measure current and voltage.
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— The working of dc machine is such that they produce ac voltages at their output terminals these ac voltages are converted into a dc voltage. In today's post, we will have a look at designing and arrangement of windings on a rotor that called armature windings and their linking with the commutators to ac to dc conversions.
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— A DC motor is an electrical machine that converts mechanical energy into direct current and vice-versa. Direct current (DC) motors are widely used in today's manufacturing industries. Due to their extensive functionality, DC motors are frequently used in small and medium-sized motoring applications, including robotics and automobiles.
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Overview and application domains of transformers and DC machines. Transformers, DC generators, DC motors, DC tachogenerator, DC servomotor, High torque motor: classification, constructional features, Principle of operation, Equivalent circuits, No-load and short circuit tests, machine characteristics, starting speed control, voltage regulation ...
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A dc generator is an electrical machine which converts mechanical energy into direct current electricity. This energy conversion is based on the principle of production of dynamically induced emf. This article outlines …
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DC generators differ primarily in their commutator design. Commutation involves positioning the DC generator brushes to synchronize with the change in armature current direction.
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— What is an DC Motor? A DC motor is an electrical device that converts energy from Direct Current (DC) into mechanical energy. When the motor is supplied with DC, it creates a magnetic field in the stator. The stator field repels and attracts the opposite magnetic field on the rotor creating a torsion force which results in a rotational …
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— Construction of DC Machines. In the structure of DC machine either dc motor or generator, there are 2 main parts first one is static or the second one is moving. The static part is stator and the moving part is rotor. In the stator of dc machine, there is a frame that provides protection and support to the internal structure from the external …
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— DC electricity means the electrons flow in just a single direction, from one terminal of a battery directly to the other. If we reverse the battery then the current will flow in the opposite direction. Electricity Basics. Inside the copper wire we find copper atoms. Orbiting each atom, we find free electrons, these are called free electrons ...
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— Construction of DC machines. 1.) Yoke. The outer frame of a dc machine is called a yoke. It is made up of cast iron or steel. It not only provides mechanical strength to the whole assembly but also carries the magnetic flux produced by the field winding. 2.) Poles and pole shoes. Poles are joined to the yoke with the help of bolts or welding.
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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 _____
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DC Machine: Construction and their Applications The DC machine can be classified into two types namely DC motors as well as DC generators. Most of the DC machines are equivalent to AC machines because they include AC currents as well as AC voltages in them. The output of the DC machine is DC output because they convert AC voltage to DC voltage.
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— 4. 4 Construction of DC Machine Dr. J. Belwin Edward, Associate Professor, SELECT, Vellore Institute of Technology, Vellore, Tamil Nadu, India • Stator Assembly • Yoke •Field Pole-Core • Field …
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Therefore, either machine can be used as a motor or a generator. So the following discussion about the construction of DC motor is equally valid for the construction of the DC generator. Also, we can entitle it as the …
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— By controlling the small DC field current of the exciter generator (located on the stator), it is possible to adjust the field current on the main machine without slip rings and brushes. This arrangement is shown schematically in Figure 3, and a synchronous machine rotor with a brushless exciter mounted on the same shaft is shown in Figure 4 above.
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— 6. Commutator The commutator is mounted on the rotor of a dc machine. The commutator and brush arrangement works like a mechanical dual converter. In case of generator it rectifies the induced ac to dc. In case of motor it inverts the dc supply to ac. (In motor, the commutator reverses the current through the armature conductors to get …
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— D.C. Machines : Principles and Construction Introduction to DC Machines Construction of a DC machine E.M.F. Equation Working principle as a Generator or as a Motor Types of Armature winding Lap winding and Wave winding (concept of simplex, duplex & multiplex winding) Magnetization curve of DC machines Torque Losses & …
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Explore the virtual lab for constructing DC circuits with interactive simulations and intuitive controls.
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