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in a dc machine core losses occur both in stator and rortor but stator core losses are negligible as compared to rotor core losses because in stator constant dc flux is given and the statot conductor is stationary so there are no eddy losses and as the flux is stationary there are no hysteresis loassses also but in rotor armature winding is placed so here alternating field is induced which cuts the rortating conductors of rotor thereby inducing eddy as well as hysteresis losses fo any more info. contact zombie
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Is a DC motor single excited or double excited?
It is doubly excited if it is sparately excited dc motor, singly excited if it is self excited machine
What is the purpose of a DC controller on a notebook?
Notebook Era Web Site - Notebook Drivers Online Download http://www.notebookera.com http://notebook-drivers.notebookera.com http://opendrivers.notebookera.com The real answer is: The DC controller is a card inside the notebook that converts voltage to CPU core voltage.
Advantage of dynamic braking in dc machines?
This helps the machine to stop easier. It is a much easier process to use and safer for everyone involved in the process.
What are the most common fault in a DC machine?
The most common faults are i know as below: a) brush carbon arcing due to high current and friction; b) dust or dirt; c) over temperature due to high ambient and excessive use; d) overload and winding insulation failure e)inadequate protection against heat and poor ventilation
How many type of component in NIC?
The components of NIC are : buffer pulse transformers lan dc/dc converters lan filters
What is the condition for maximum efficiency of a DC machine?
The condition for maximum efficiency of a d.c. machine is that VARIABLE LOSSES must be equal to CONSTANT LOSSES i.e., variable losses = constant losses..
Why are the losses in a dc machine important to know?
Losses mean energy losses, which cost money, and most people like to know how much a machine is going to cost to run.
Why iron loss cald constant power loss?
How to calculate iron losses in dc machine
Why armature core is laminated in dc machine?
to reduce the eddy current loss in the machine
What are the constant losses in a DC machine?
Constant losses Those losses in a d.c. generator which remain constant at all loads are known as constant losses. The constant losses in a d.c. generator are: (a) iron losses (b) mechanical losses (c) shunt field losses
What motor is NOT suitable for use as a DC machine?
What motor is NOT suitable for use as a DC machine?
What is the important of brush in DC machine?
The slip rings are the most important brush in DC machine.
What is swinburne's test of DC shunt motor?
swinburne's test on dc shunt machine is to predetermine the efficiency of the dc machine , but it is not accurate it is just like estimation of efficiency of dc shunt machine when it is run as a motor and a generator............................
What is an dc meachine?
it is a machine which operates on the dc power source.
Why laminations are used for iron parts of a dc machine?
Laminations minimize eddy currents, or current flow across the iron parts. This is one method to minimze stray losses.
How many types of DC machine?
05 types of dc machines
Derive emf equation of a DC machine?
equation of ac machine
