Comparison between an AC-DC matrix converter and an interleaved DC-dc converter with power factor corrector for plug-in electric vehicles

Abstract

Passive three-phase rectifier circuits are very popular for ac-dc power conversion. However, they do not have the capability to reverse the power flow, which is demanded by some recent potential smart-grid applications, such as vehicle-togrid (V2G) power transfer. This paper compares two structures of reversible battery chargers, i.e., an interleaved dc-dc converter fed by a three-phase power factor corrector rectifier and a threephase ac-dc matrix converter, which may be suitable for plug-in electric vehicles. The comparison aims to estimate the power losses, the power capability and the size of the converters under common requirements.Keywords-battery charger, plug-in electric vehicle, ac-dc matrix converter, interleaved dc-dc converter, PFC.

A Modular AC-DC Power Converter with Zero Voltage Transition for Electric Vehicles

“…The proposed topology is intended for Level 3 applications, which justifies the use of a three-phase voltage supply. Table 5 shows that the number of switching devices used in the proposed converter is slightly higher in contrast to the topologies described in [14][15][16]; however, only four of them are located on-board the vehicle. The use of the bidirectional switches in the matrix converter allows the possibility power flow reversal through the converter, being more suitable to future smart grids.…”

“…L was judged to be 3 mH, in such a way that φ can be ranged from 0.46° to 10.3°. The voltage Vcpk is expressed in function of the modulation index, Ma, when the converter operates with a SVPWM scheme [14], as follows: where Pin and Pout are the input and output power converter respectively and are equivalent to Equation (13):…”

“…L was judged to be 3 mH, in such a way that φ can be ranged from 0.46° to 10.3°. The voltage Vcpk is expressed in function of the modulation index, Ma, when the converter operates with a SVPWM scheme [14], as follows: The voltage V cpk is expressed in function of the modulation index, M a , when the converter operates with a SVPWM scheme [14], as follows:…”

“…This paper presents the principle of operation of a modular AC-DC converter with Zero-Voltage Transition (ZVT), whose aim is to produce high-quality current waveforms, output regulation and soft switching of the semiconductor devices through the use of an off-board current-feed matrix converter and an on-board high-frequency H bridge, in such a way that the size of the converter located inside the vehicle becomes reduced in contrast with other topologies, [14][15][16]. The method potentially exhibits the following advantages: first, the current-feed matrix converter is used for straightforward generation of low-ripple, AC line currents without the need of several power stages; second a high-frequency transformer is used to isolate the matrix converter from the H bridge and regulate the output voltage; and third, the circuit uses a ZVT technique together with Space Vector Pulse Width Modulation (SVPWM) to achieve soft commutation of the power semiconductors and generate high-quality sinusoidal currents.…”

EMI Filter Design for a Single-stage Bidirectional and Isolated AC–DC Matrix Converter

“…The new modulation proposed in [17] and patented in [18] allows independent control of active and reactive power (PQ control) as well as the DC current in the battery pack. By exploring the MC attributes, circuit volume and weight can be reduced, and a longer service life is expected when compared with equivalent DC-link based solutions [16,19,20]. However, due to its complex power structure, it presents EMC challenges that have to be studied in order to ensure compliance with the international standards by designing the necessary EMI filter.…”