Differences

This shows you the differences between two versions of the page.

--- 3-phase_currents [2022/04/14 14:30]
stanzurek
+++ 3-phase_currents [2024/05/19 21:23] (current)
stanzurek
@@ Line 11: / Line 11: @@
 I3 (at -120°) = ''-0.5 - I * 0.866''
-In order to use different amplitudes, these can be just multiplied by the required constant. For example, in order to achieve a current of **10 A rms** in each phase (with the same angles), the values should be multiplied by 10 * 1.4142 = 14.142, hence:
+In order to use different amplitudes, these can be just multiplied by the required constant. For example, in order to achieve a current of **10 A rms** in each phase (with the same angles), the values should be multiplied by 10 * 1.4142 = 14.142 (so that the sqrt(2) scaling is also applied). Hence:
 I1 (at 0°) = ''14.142''
@@ Line 18: / Line 18: @@
 I3 (at -120°) = ''-7.0711 - I * 12.2474''
+Note that you can multiply directly inside the input box, because the value will be evaluated correctly. So for example, typing in: \\ ''-0.5 * 14.142 - I * 0.866 * 14.142'' will set it to ''-7.0711 - I * 12.2474''.
 {{3phase_current.png}} Setting up the complex value of I2

Unofficial FEMM documentation by Dr Stan Zurek