Frequency-Modulated Sinusoidal Current Source

This is an independent current source with a single frequency modulated sinusoidal waveform of the current as a function of time. The arrow symbol shows the direction of the positive current flow through the current source.

The equation describing the waveform is

I(t) = I_O + I_a × sin[(2p × F_C × t) + M_di × sin(2p × F_S × t)]

where

• I_O is Offset current in Amps.
• I_a is the peak amplitude in Amps.
• F_C is the carrier frequency if type is TIME.
• M_di is the modulation index.
• F_S is the signal frequency if type is TIME.

If the type is POSITION, the frequency should be calculated based on the respective spatial periodicity, taking into account the fact that t in the above equation is measured in degrees for rotational type of motion and in the user-defined geometry units for translational type of motion.

If the type is SPEED, the frequency should be calculated based on the respective speed periodicity, taking into account the fact that t in the above equation is measured in rpm for rotational type of motion and in the user-defined geometry units per second for translational type of motion.