Development of a high-frequency space vector pulse width modulated inverter with an active common-noise canceler

This paper proposes a new circuit configuration of the active common-noise canceler (ACC), which is used to reduce electromagnetic interference of a space vector modulation (SVPWM) inverter. The original ACC, which was proposed by the authors, cancels all components of the common-mode voltage and, therefore, cannot be used in an SVPWM inverter owing to the low-frequency component of the common-mode (zero-sequence) voltage. The proposed ACC cancels only the high-frequency component of the common-mode voltage so it can be used in SVPWM inverters. Furthermore, the high-frequency carrier makes a large contribution to downsizing the common-mode transformer. To confirm the suitability and usefulness of the proposed ACC, an experimental system including a 100-kHz SVPWM inverter was constructed and tested. The experimental results show that the proposed ACC can reduce the high-frequency component of the common-mode voltage.