A power conversion apparatus, comprising: a transformer, wherein the transformer has a primary winding and a secondary winding; a first switch coupled to the primary winding to control the flow of current through the primary winding; a second switch coupled to the primary winding, to control the flow of current through an active resonant clamp circuit, wherein the active resonant clamp circuit is configured to absorb leakage energy from the primary winding, and comprises: a first capacitor coupled to the primary winding; a second capacitor coupled to the primary winding; and a plurality of diodes (D2-D4) connected to the first capacitor and the second capacitor, wherein one diode of the plurality of diodes (D2-D4) is connected in series between the first capacitor and the second capacitor; and a controller coupled to the first switch and the second switch, configured to: switch the first switch on, to store energy in the primary winding of the transformer; switch the first switch off and switch the second switch on, to cause the first and second capacitors (C1, C3) to charge in series via the one diode, wherein when all leakage inductance energy has been transferred from the transformer to the first and second capacitors (C1, C3), the one diode reverse biases and one or more other diodes of the plurality of diodes (D3, D4) forward bias to permit discharge of the first and second capacitors (C1, C3) in parallel through the one or more other diodes (D3, D4); switch the second switch off at a predetermined time interval or when the voltage across the first and second capacitors (C1, C3) each falls to a predetermined voltage level; and switch the first switch on, to achieve zero voltage switching. a transformer, wherein the transformer has a primary winding and a secondary winding; a first switch coupled to the primary winding to control the flow of current through the primary winding; a second switch coupled to the primary winding, to control the flow of current through an active resonant clamp circuit, wherein the active resonant clamp circuit is configured to absorb leakage energy from the primary winding, and comprises: a first capacitor coupled to the primary winding; a second capacitor coupled to the primary winding; and a plurality of diodes (D2-D4) connected to the first capacitor and the second capacitor, wherein one diode of the plurality of diodes (D2-D4) is connected in series between the first capacitor and the second capacitor; and a first capacitor coupled to the primary winding; a second capacitor coupled to the primary winding; and a plurality of diodes (D2-D4) connected to the first capacitor and the second capacitor, wherein one diode of the plurality of diodes (D2-D4) is connected in series between the first capacitor and the second capacitor; and a controller coupled to the first switch and the second switch, configured to: switch the first switch on, to store energy in the primary winding of the transformer; switch the first switch off and switch the second switch on, to cause the first and second capacitors (C1, C3) to charge in series via the one diode, wherein when all leakage inductance energy has been transferred from the transformer to the first and second capacitors (C1, C3), the one diode reverse biases and one or more other diodes of the plurality of diodes (D3, D4) forward bias to permit discharge of the first and second capacitors (C1, C3) in parallel through the one or more other diodes (D3, D4); switch the second switch off at a predetermined time interval or when the voltage across the first and second capacitors (C1, C3) each falls to a predetermined voltage level; and switch the first switch on, to achieve zero voltage switching. switch the first switch on, to store energy in the primary winding of the transformer; switch the first switch off and switch the second switch on, to cause the first and second capacitors (C1, C3) to charge in series via the one diode, wherein when all leakage inductance energy has been transferred from the transformer to the first and second capacitors (C1, C3), the one diode reverse biases and one or more other diodes of the plurality of diodes (D3, D4) forward bias to permit discharge of the first and second capacitors (C1, C3) in parallel through the one or more other diodes (D3, D4); switch the second switch off at a predetermined time interval or when the voltage across the first and second capacitors (C1, C3) each falls to a predetermined voltage level; and switch the first switch on, to achieve zero voltage switching.