An alternate current, AC, series voltage regulator for regulating an AC output voltage of an AC output power source, comprising: an AC high frequency, HF, series voltage buck power regulator topology for bucking an AC input voltage of an AC input power source, comprising: a first unipolar path, comprising a first half-bridge, comprising a first and a second rectifiers (D1, D2) connected in series with a first and a second independently controllable unipolar switches (Q1, Q2) respectively; and a second unipolar path, comprising a second half-bridge, comprising a third and a fourth rectifiers (D3, D4) connected in series with a third and a fourth independently controllable unipolar switches (Q3, Q4) respectively; and an AC HF series voltage boost power regulator topology for boosting the AC input voltage, comprising: a third unipolar path, comprising a third half-bridge, comprising a fifth and a sixth rectifiers (D5, D6) connected in series with a fifth and a sixth independently controllable unipolar switches (Q5, Q6) respectively; and a fourth unipolar path, comprising a fourth half-bridge, comprising a seventh and a eighth rectifiers (D7, D8) connected in series with a seventh and a eighth independently controllable unipolar switches (Q7, Q8) respectively; and a control circuitry for receiving the AC input voltage, an AC reference voltage, and the AC output voltage, and generating switch driving signals for the unipolar switches; wherein the first unipolar path comprises a first power inductor; the second unipolar path comprises a second power inductor; the third unipolar path comprises a third power inductor; the fourth unipolar path comprises a fourth power inductor; and positive and negative half cycles of AC input voltage are processed separately and independently in either the AC HF series voltage boost power regulator topology or the AC HF series voltage buck power regulator topology at any one time eliminating any power "shoot-through". an AC high frequency, HF, series voltage buck power regulator topology for bucking an AC input voltage of an AC input power source, comprising: a first unipolar path, comprising a first half-bridge, comprising a first and a second rectifiers (D1, D2) connected in series with a first and a second independently controllable unipolar switches (Q1, Q2) respectively; and a second unipolar path, comprising a second half-bridge, comprising a third and a fourth rectifiers (D3, D4) connected in series with a third and a fourth independently controllable unipolar switches (Q3, Q4) respectively; and a first unipolar path, comprising a first half-bridge, comprising a first and a second rectifiers (D1, D2) connected in series with a first and a second independently controllable unipolar switches (Q1, Q2) respectively; and a second unipolar path, comprising a second half-bridge, comprising a third and a fourth rectifiers (D3, D4) connected in series with a third and a fourth independently controllable unipolar switches (Q3, Q4) respectively; and an AC HF series voltage boost power regulator topology for boosting the AC input voltage, comprising: a third unipolar path, comprising a third half-bridge, comprising a fifth and a sixth rectifiers (D5, D6) connected in series with a fifth and a sixth independently controllable unipolar switches (Q5, Q6) respectively; and a fourth unipolar path, comprising a fourth half-bridge, comprising a seventh and a eighth rectifiers (D7, D8) connected in series with a seventh and a eighth independently controllable unipolar switches (Q7, Q8) respectively; and a third unipolar path, comprising a third half-bridge, comprising a fifth and a sixth rectifiers (D5, D6) connected in series with a fifth and a sixth independently controllable unipolar switches (Q5, Q6) respectively; and a fourth unipolar path, comprising a fourth half-bridge, comprising a seventh and a eighth rectifiers (D7, D8) connected in series with a seventh and a eighth independently controllable unipolar switches (Q7, Q8) respectively; and a control circuitry for receiving the AC input voltage, an AC reference voltage, and the AC output voltage, and generating switch driving signals for the unipolar switches; wherein the first unipolar path comprises a first power inductor; the second unipolar path comprises a second power inductor; the third unipolar path comprises a third power inductor; the fourth unipolar path comprises a fourth power inductor; and positive and negative half cycles of AC input voltage are processed separately and independently in either the AC HF series voltage boost power regulator topology or the AC HF series voltage buck power regulator topology at any one time eliminating any power "shoot-through".