Core assemblies for magnetic saturation detector without requirement for bias current

A magnetic saturation detector comprising:

• a magnetic core assembly comprising:
• a core assembly comprising,
• a lower core piece having a center section, and
• an upper core piece having a center section, the center section of the upper core piece aligned to the center section of the lower core piece such that a center post of the core assembly is formed;
• and
• a power winding, wrapped around the center post, wherein when a current is passed through the power winding a power flux density vector is generated, wherein the power flux density vector has a transverse component and a non-transverse component, and wherein the transverse component has a higher magnetic reluctance than the non-transverse component;
• a transverse winding, perpendicular to the power winding, wherein transverse components from the magnetic core assembly produce a transverse voltage waveform on the transverse winding;
• and
• a voltage detection circuit, configured to receive the transverse voltage waveform and to detect a change in the sign of the slope of the transverse voltage waveform, wherein the change in the sign of the slope indicates magnetic saturation.