New voltage balance technique for capacitors of symmetrical half-bridge converter with current mode control

DESIGN AND APPLICATION OF AC/DC SWITCHING POWER SUPPLY WITH HALF BRIDGE DC/DC CONVERTER TOPOLOGY FOR BATTERY SYSTEMS of ELECTRICAL VEHICLE

“…Voltage is occurred in primary 49% of total period, when it is thought that 2 µs dead time each two-half period. Duty cycle and conduction time is as in (16).…”

“…It is hard to choose switching power supply topologies for low or medium power level. For lower and medium power levels, push-pull and half bridge converter are more popular than full bridge converter [16]. For 200 W -1000 W power level, generally half bridge topology is preferred, also in half bridge topology, a capacitor is added to primary winding [17].…”

“…Nevertheless, push-pull converter has an easiness of driving power switches because it has two low side power switches which can be driving without the need of isolation or bootstrap driving principle. Advantage of half bridge converter comparing to push-pull converter is not having middle point of primary winding that provides easiness for applications [16]. In addition, comparing of full bridge converter, voltage stress of the half bridge converter is nearly half due to the splitted capacitor connection to the primary of transformer.…”