Lin Engineering
Page 23
5/16/2016
Silverpak 17C-CE User Manual
Rev 1.11
Take a look at position #7. If we were to draw the arrow
at position 7 as the hypotenuse of a triangle, it would
look like the triangle to our left. Recall from geometry a
90°-45°-45° triangle is a 1-1-√2 combination. The √2,
or 1.4 value is also the radius of the dotted circle shown
above. Therefore, during certain steps, Phases A or B will
receive 1.4 Amps of current. But the average, or RMS
current throughout these 8 steps is only 1.0 Amps. RMS
and Amps/Phase is the same meaning.
The 1.4A along this hypotenuse is also known as the 2-Phase On position, since both A and
B Phases are “On” and receive current. It is also known as the
peak current.
As we see the waveform that’s plotted for the A Phase, the highest value on the curve is
known as the peak value.
Motors have a rated current, or average RMS value since in operation, the current is
continuously changing. The most logical way to describe a rating is to take an average, or
RMS (root means squared) value. But drivers understand current in terms of peak current,
therefore the conversion is:
Amps/Phase x 1.4 = Amps Peak
Technical Support
Technical Support for Lin Engineering
(Mon.-Fri., 8:00 a.m.-5:00 p.m.)
Our technical support group is glad to work with you in answering your questions. If
you cannot find the solution to your particular application, or, if for any reason you
need additional technical assistance, please contact our technical support by
phone at,
408-919-0200
, email at,
, on the
Web:
, and
Live Support
1.41 AMP
1 AMP
1 AMP
(√2)
