3.13 Flashcards
An example of a three phase current would be ?
Generator
Three phase current generator has two different voltages which can occurs what are the two?
115V for single phase
200V from phase to phase
For a sinusoidal supply how can you find the RMS value
Multiple the peak value by 0.707
How can you find the peak value if you know the RMS value
Multiple the RMS by1.41
AC has two characteristics
Peak voltage ^V,Vp
Cycle time T
What is an advantage for 3 phase principles
Continuous power output which causes less strain to the bearings
Formula for frequency
F=1/T (Hz)
What is cycle time T
Time for a complete periodic cycle
If the area between the sine curve and horizontal time axis is the same above and below the axis what would the voltage and current be
AC voltage and AC current
What are three phase generators
Three AC generators which are packed in one house
What is it called when periodic voltage and current,which do not show the sinusoidal waveform in the voltage time or current time diagram
Non-sinusoidal AC voltage or current
What does RMS Value stand for
Root Mean Square Vaule
What is rectification
Takes away the direction part AC—-> DC
What is the main difference between AC and DC
The amount of voltage changes due to time and direction changes (+/-)
Common AC has what
The change repeats continuously
Average is 0, positive and Newark’s are equal
Sine curve (easy to generate )
