A high frequency resonant EF2 converter for electric vehicle charging

The use of high frequency resonant converters are found to be increasing in fast charging applications and in Switched Mode Power Supplies (SMPS) due to high power density delivered by these types of converters. Among them the single switch resonant converters are mostly preferred because of lesser complexity in controlling the switch. Hybrid Electric Vehicle's (HEV) are rapidly advancing as alternative power trains for green transportation. The vehicles electrification not only involves the traction parts, but also generates new applications for electric power conversion. One of the key blocks inside HEV's is the DC-DC converter for auxiliary power supply of electric loads. The use of conventional DC-DC converters at high frequency and resonance will increase the control complexity and losses. With suitable filters power problems can be managed but will result in huge cost and complexity. To avoid such difficulties a high frequency resonant EF
₂
converter is incorporated with reduced size of reactive components. Here regulated DC power can be obtained without complex auxiliary circuits through this.