A study of the Auxiliary Resonant Commutated Pole (ARCP) converter and a comparison with standard hard-switched inverters is presented. A thorough description of the AELCP circuit topology is made with three switching scenarios discussed: commutation from a diode, commutation from a switch with low current, and commutation from a switch with high current. The efficiency of the ARCP inverter is attributed to the fact that switching losses are eliminated by switching under zero voltage or zero current conditions. To accomplish this task, addition circuitry is introduced which colntributes to additional conduction losses. An example H-bridge is presented using both ARCP phase legs and hard-switched phase legs. Losses for each case are calculated and a comparison is made. From simulations, it is shown that the additional conduction losses introduced by the ARCP circuit are small in comparison with the switching losses found in a standard hard-switched circuit. A simulation of a three-phase example ARCP inverter is briefly discussed.

Date of this Version

August 1995