Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / abhi
Hopkinson's test is another useful method of testing the efficiency of a dc machine. It is a full load test and it requires two identical machines which are coupled to each other. One of these two machines is operated as a generator to supply the mechanical power to the motor and the other is operated as a motor to drive the generator. For this process of back to back driving the motor and the generator, Hopkinson's test is also called back-to-back test or regenerative test.
If there are no losses in the machine, then no external power supply would have needed. But due to the drop in the generator output voltage we need an extra voltage source to supply the proper input voltage to the motor. Hence, the power drawn from the external supply is therefore used to overcome the internal losses of the motor-generator set.
| Is This Answer Correct ? | 1 Yes | 0 No |
Post New Answer View All Answers
What will be electrical cost per sqft for IT building (basebuild and fitout)and for residential township?
quantizer means?
one conductor length is L.and i am strech uniformly this conductor and made length is 2L.so resistance of this strech conductor is R=4R..but i want to know about area of stech conductor hows it become a/2..
What is the function of retrip in busbar?
what does vector group Dyn11 tell us? also tell me how will u differentiate between phase lead and phase lag thru this vector group
i want to model paper for section engg.
how to compute kAIC? with formulas...
what is KA rating and how can we choose switchgears on applications
Generation of voltage for each phase are same of a turbogenerator.Although the short circuit current flow when two phase of turbogenerator are shorted(where current can't flow without potential difference),why?
Q) Write VBscript code along with QTPscript code in QTP tool for below scenario 1. Launch yahoo site(i know) 2. Do loogin(i know) 3.Click inbox link(i know) 4.Go to every page of mail box and count no.of read mails and no.of unread mails(i know) 5.Store page numbers, read mail count and unread mail count in a new excel file sheet 6.Create 10 types of graphs on that data 7.Do logout and close site(i know) 8.Save new excel files with graph
what is the advantages og idmt relay over magnetic relay??
Refernce currents are to be generated using refernce cueernts how can this be done
sir i had plane to do some project with the base of hopkinson test in AC supply its possible
What are Contactors? How they works and what its highest rating?
What is the Temperature to be set in Thermostat provided in Marshalling box of the Transformer / Motor.
