Page 294 - Basic Electrical Engineering

Form factor,

Example 3.4 Calculate the RMS value and average value of the elevated
saw-tooth-type current wave shown in Fig. 3.11

Figure 3.11 Saw-tooth wave of example 3.4

Solution:

It can be seen from the wave shape that 0abcT makes one cycle. The same

pattern is being repeated for each time period of T. The equation for the line
ab is of the form y = mx + c. Here the slope m is bc/ac, i.e., equal to 5/T. The
value of c is 5 and y is represented by i and x by t.

Therefore, the equation of the line ab is