Common Mode Power Control of Three-Phase Inverter for Auxiliary Load without Access to Neutral Point
Journal article, 2021

The purpose of this study is to investigate the potential of obtaining an auxiliary dc output from the common mode switching harmonics of a three-phase inverter without access to the neutral point of the ac load. To achieve this, the control of common mode switching harmonics with space vector modulation is proposed. With this control, common mode switching harmonics can be regulated independently from the differential mode power flow to the main three-phase load. To physically implement the common mode power flow, a harmonic extraction circuit is placed in parallel with the main three-phase load. The extraction circuit is formed by series-connected inductance and capacitance. Due to the LC series resonance and the mutual coupling of the inductance, only common mode switching harmonics can pass through the extraction circuit. The extracted harmonics are then rectified and delivered to the auxiliary dc output. The control and topology are verified in both simulations and experiments. In the end, it is shown in experiments that there is no significant difference of the inverter efficiency after the auxiliary dc load is connected. This method can be used for instance to drive an ac machine while charging a battery or powering a compressor simultaneously.

Power Electronics

Common Mode

Switching Harmonics

Zero-Sequence

Author

Junfei Tang

Chalmers, Electrical Engineering, Electric Power Engineering, Electrical Machines and Power Electronics

Daniel Pehrman

Chalmers, Electrical Engineering, Electric Power Engineering, Electrical Machines and Power Electronics

Georgios Mademlis

Chalmers, Electrical Engineering, Electric Power Engineering, Electrical Machines and Power Electronics

Yujing Liu

Chalmers, Electrical Engineering, Electric Power Engineering, Electrical Machines and Power Electronics

IEEE Transactions on Power Electronics

0885-8993 (ISSN)

Vol. 37 1 221-233

Development of efficient and environmental friendly LONG distance powertrain for heavy dUty trucks aNd coaches

European Commission (EC) (EC/H2020/874972), 2020-01-01 -- 2023-06-30.

Areas of Advance

Transport

Energy

Subject Categories

Control Engineering

Signal Processing

Other Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1109/TPEL.2021.3100001

More information

Latest update

10/14/2021