Which part provides path for magnetic flux inside DC machine?

Which part provides path for magnetic flux inside DC machine?

Armature Core It houses the conductors in the slots. It provides an easy path for the magnetic flux.

What is the function of the yoke in a DC machine?

Yoke or the outer frame of DC generator serves two purposes, It holds the magnetic pole cores of the generator and acts as cover of the generator. It carries the magnetic field flux.In small generator, yoke are made of cast iron.

What is the function of the yoke?

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.

What is magnetic return path?

Concept B: putting magnets or permeable materials close together alters the “return path” of their magnetic flux lines. For example, a “closed core” transformer versus a “shell core”, where the idea behind the shell is to bring the magnetic return path of the coil closer to the coil.

Which part of DC machine provides the path of low reluctance for magnetic field?

a) Functions : Armature core provides house for armature winding i.e. armature conductors. To provide a path of low reluctance to the magnetic flux produced by the field winding.

What is commutation in DC machine?

The commutation in DC machine or more specifically commutation in DC generator is the process in which generated alternating current in the armature winding of a dc machine is converted into direct current after going through the commutator and the stationary brushes. It is called commutation period.

What are the functions of yoke and pole shoe of DC machine?

These two structures are assigned for different purposes, the pole core is of small cross-sectional area and its function is to just hold the pole shoe over the yoke, whereas the pole shoe having a relatively larger cross-sectional area spreads the flux produced over the air gap between the stator and rotor to reduce …

Can DC machine work without yoke?

Construction of DC Machine. The construction of the 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.

Can dc machine work without yoke?

What are the functions of yoke and pole shoe of dc machine?

What is flux in magnetic circuit?

Magnetic flux is a measurement of the total magnetic field which passes through a given area. It is a useful tool for helping describe the effects of the magnetic force on something occupying a given area. The measurement of magnetic flux is tied to the particular area chosen.

What is the source of producing the magnetic flux in a magnetic circuit?

The source of magnetic flux is current. Not just current, but the product of current and the number of times the current is wrapped around a core—NI. The units for NI are ampere-turns (At). This quantity, magnetomotive force (MMF), is analogous to voltage in electric circuits.

The yoke make by cast steel for large machines and cast iron for a small machine. It uses to protect the internal parts of the DC machine and gives mechanical support to the poles. The yoke provides a return path for magnetic flux. In the yoke, the laminations are not required, but the modern machines uses the laminations in yoke.

What is the function of the yoke in a magnetic flux generator?

The yoke provides a return path for magnetic flux. In the yoke, the laminations are not required, but the modern machines uses the laminations in yoke. The pole core use to provide housing to the field winding.

Why does flux flow from north to South in a magnet?

In between the pole faces, air is present which offers higher reluctance to flux. Hence in air, flux flows from north to south. In order to complete the path, inside the magnet from south to north, a low reluctance path is required and this path is provided by the yoke.

What is the function of the armature in a DC machine?

When the field coils are excited by DC supply, the flux passes through pole, air gap, armature and yoke ( or frame ) of DC machines ( Figure A ). It houses the armature conductors. When an armature is rotated in the magnetic field, its function is to provide low reluctance path to the magnetic flux.