Performance evaluation of a permanent magnet electric-drive-reconfigured onboard charger with active power factor correction

Abstract

This paper presents a comprehensive charging operation for an electric-drive-reconfigured onboard charger (EDROC) with active power factor correction (APFC). The charging topology exclusively utilizes the three-phase permanent magnet synchronous motor (PMSM) propulsion system as a three-channel boost-type converter in which only a contactor and a small diode bridge are added. First, the operation scenario of the EDROC is introduced. Second, the relationship between electromagnetic torque and rotor position is investigated. Third, the current ripple cancellation of the EDROC is discussed in detail. Moreover, to implement the single-phase APFC along with charging voltage/current regulation of propulsion battery, control strategies including current balancing and synchronous/interleaving PWM strategies are incorporated. Finally, 200W proof-of-concept prototype-based tests are conducted under different operation scenarios.

Keywords

• active power factor correction
• current balancing
• electric-drive-reconfigured
• electromagnetic torque
• interleaving
• onboard charger