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 …
Poles of DC Motor. The magnetic poles of DC motor are structures fitted onto the inner wall of the yoke with screws. The construction of magnetic poles basically comprises of two parts. Namely, the pole core and the pole shoe stacked together under hydraulic pressure and then attached to the yoke.
Construction:- A dc machine consists of 3 main parts. 1-- Magnetic field system- It is the stationary part of the machine. It produces the main magnetic flux. The outer frame is called the yoke and it is a hollow cylinder of cast iron or rolled steel …
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.
Construction of DC Motor. The construction of DC motor have following main parts : 1. Yoke :- It is made of cast iron for small machines & cast steel or rolled steel for large machines. Yoke provides space for providing poles for magnetic flux & it carries the magnetic flux produced by …
Parts Used in Construction of DC Motor. The main parts used in the construction of DC motor are the yoke, poles, field winding, commutator, carbon brushes bearings, etc. A brief description of the various parts is as follows: Yoke. The yoke acts as the outer cover of a DC …
The Yoke or frame of the DC motor is made up of cast iron or steel and it forms an integral part of the stator. The main function of the Yoke is to provide mechanical support over inner complex part of the motor and also provide support to the armature and the field winding system. Working of DC …
What are the essential parts of DC Machine? Essential parts are Field magnet, armature, commutator, brush and brush gear, bearing and shaft. DC machine (whether a generator or motor) with four poles is shown in Fig. 1. In construction, dc machine consists of four parts mainly. Field magnets.
The yoke of a dc motor forms an integral part of the stator or the static part of the motor. It is made up of cast iron or steel. Its main function is to form a protective covering over the inner sophisticated parts of the motor and provide support to the armature.It is outer cover of dc motor also called as frame.
A DC generator is often used as a DC generator motor without altering its construction. So, a dc generator motor may usually be called a DC machine. The key parts of DC generators are yoke, poles, pole shoes, armature core, armature winding, commutator, brushes, magnetic field system, commutator, end housings, bearings, and Shafts.
The numbers of brush locations are decided by the type of winding. In lap winding the number of brush locations is equal to number of poles and in wave winding it is always two. In each location there may be more than one brush mounted on a Spindle, whenever the current per brush location is more than 70A.
DC motors and generators have the same basic construction, differing primarily in the energy conversion. The basic requirements are a conductor, flux and relative motion between them. The physical structure of the machine consists of 2 parts: the stator and the rotor. The stationary part consists of the frame, and the pole pieces, which project ...
The Functions of Yoke are: It provide mechanically support to the poles. It serves the purpose of outer most cover of the motor. It provide a path of low reluctance for flux. It forms a part of the magnetic circuits. And in the last, It is prepared by Cost Iron, For large machines, we used rolled steel, silicon steel which provides high ...
The stationary part of the DC machine consists of main poles. The function of the main pole in DC machines is to provide a low reluctance path for the magnetic flux. A low reluctance path provides the stronger magnetic field. Other stationary parts of DC machine are frame/ yoke…
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.
Yoke; Pole core, pole shoes and inter poles; Armature; Commutator; Brushes & Bearings; Whether a machine is a d.c generator or a DC motor, the construction basically remains the same as shown. Yoke It is also called a magnetic frame. It serves two purposes. It acts as a protecting cover for the DC machine and provides mechanical support for the ...
Construction of DC Generator - Each Part Explanation. Electricity generated at all the power plants is alternating i.e., ac, in order to generate direct current i.e., dc, a commutator is used to convert the generated ac supply into dc supply. Hence, an electrical generator with a commutator fixed on the shaft is known as a DC Generator.
Also Read: Difference Between AC And DC Generator | AC Vs DC Generator #4. Yoke: The exterior of a DC generator is a yoke, and it is made of cast iron otherwise steel. It provides the mechanical strength required to carry the magnetic …
Construction of DC Machine. 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 & bearings. Some of the parts of the DC machine is discussed below. Yoke. Another name of a yoke is the frame.
The main function of the yoke is to provide protection for whole machine. The yoke is a stationary and outer cylindrical part of DC machines. The cheapness is main consideration therefore yoke is made up of cast iron in the small DC machines but it is made up of cast still or rolled still in the large DC machines.
When the coils carry dc current, the pole core become an electromagnet and produces the magnetic flux. The magnetic flux passes through the pole core, the air gap, the armature and the yoke. The number of poles in a DC Generator depends on the speed of the machine and the output for which the machine is designed.
A practical DC motor consists of the following physical components: o Magnetic frame (yoke) o Pole shoes o Field coil o Armature core o Armature winding o Commutators o Brushes o Bearings Magnetic frame (Yoke): o It is made of cast iron or rolled steel.
CONSTRUCTION OF DC MOTOR. All DC machines mainly consist of two parts. ... And of cast iron for small dc motors. The yoke is used in DC machine because: A) It provides mechanical support to poles. ... Whereas the function of the brushes in a DC generator is to collect the current from the commutator and supply it to the external load circuit.
Construction of yoke of dc motor The magnetic frame or the yoke of dc machine made up of cast iron or steel and forms an integral part of the stator or the static part of the motor. Its main function is to form a protective covering over the inner …
The stationary part of the DC machine consists of main poles. The function of the main pole in DC machines is to provide a low reluctance path for the magnetic flux. A low reluctance path provides the stronger magnetic field. Other stationary parts of DC machine are frame/ yoke…
1. Yoke or magnetic frame: The outer most frame is known as Yoke. It is made of high permeability material possessing sufficient mechanical strength. Cast iron is used in small machines and cast steel or rolled steel is employed in large machines.
1.1 Yoke. a) Functions : It serves the purpose of outermost cover of the d.c. machine. So that the insulating materials get protected from harmful atmospheric elements like moisture, dust and various gases like SO2, acidic fumes etc. It provides mechanical …
DC Machine, Construction of DC Machine, Working of DC Machine, Working of DC Motor, Working of DC Generator. Latest. ELECTRICAL ENCYCLOPEDIA A Website about ELECTRICAL and ELECTRONICS Engineering. ... Main function of the Yoke is to protect the internal parts of machine from any mechanical injury, dust or moisture. ...
The outer cover frame of a DC generator is itself its magnetic frame. The magnetic frame mainly provides a path to the magnetic flux produced in the poles. This also provides mechanical support to the pole cores. We also call the magnetic frame as the yoke of the machine. In a small generator, the manufacturer provides yoke made of cast iron.
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 …