A bifilar wound motor The current flows only in one direction through each winding Normally there are two winding per bobbin and eight bobbins per motor Usually is a 5, 6 or eight wire motor One or more common leads are used per winding Has less torque than a bipolar stepper motor but is simpler to drive Bipolar stepper motor- just two windings The electronic controls reverse the current alternately between the coils This motor has more torque but requires more electronic controls
A unipolar signal is one that is always positive (or always negative), never crossing through the zero level In SFX Machine, a sine wave processed with a DC Offset of 100% would be a unipolar signal
In digital instruments, a capability for measuring voltage or current of only one polarity