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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..
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What are the advantages of Swinburne's test?
1. swinburne's test is economical since power required to test a large machine is very small (i.e.,)no load input power. 2.The efficiency of the machine can be predicted at any load, since constant losses are known. 3.This method enables us to determine the losses and efficiency without actually loading the machine
What motor is NOT suitable for use as a DC machine?
What motor is NOT suitable for use as a DC machine?
Derive emf equation of a DC machine?
equation of ac machine
What is maximum dc reverse current?
this is the best current.
How AC is converted into DC in welding machine?
rectifyer
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 the efficiency of a 12 volt electric motor?
Efficiency of any electrical machine is maximum when the load on that machine is such that the variable loss ( copper loss) is equal to constant loss (eddy current loss, hysteresis etc).the same applies to dc machines too.
What are the advantages of Swinburne's test?
1. swinburne's test is economical since power required to test a large machine is very small (i.e.,)no load input power. 2.The efficiency of the machine can be predicted at any load, since constant losses are known. 3.This method enables us to determine the losses and efficiency without actually loading the machine
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 an dc meachine?
it is a machine which operates on the dc power source.
How many types of DC machine?
05 types of dc machines
Is there a difference with AC or DC output of Xenon lights?
yes, there is a difference.. you cant get a maximum focus in AC but when DC is used you can get maximum focus..
How fast does a DC-10 airplane fly?
The maximum speed of a DC-10 is 610mph
Derive emf equation of a DC machine?
equation of ac machine
How do you make DC generator?
A DC generator is a DC machine that is driven by an external rotating force. It is constructed the same as a DC motor.
Whether a pmbldc motor is a dc or ac motor?
PMBLDC machine is actually an ac machine and due to power electronics components it's output is dc ,so therefor it is called 'dc'
