A Novel Technique for Reducing Leakage Current by Application of Zero-Sequence Voltage

作者：Ayano Hideki^*; Murakami Kouhei; Matsui Yoshihiro

来源：IEEE Transactions on Industry Applications, 2015, 51(4): 3094-3100.

DOI：10.1109/TIA.2015.2391440

• Common mode
• electromagnetic interference (EMI)
• leakage current
• zero-sequence voltage

This paper proposes a technique for reducing the leakage current flowing into a power source as a conducted noise. This leakage current may have an adverse effect on the peripheral equipment, e.g., causing malfunctions. The proposed technique requires us to add a zero-sequence voltage to the output voltage reference of the inverter. The zero-sequence voltage can be controlled without affecting the driving characteristics of the motor. In a motor drive range, a counter electromotive force increases with an increase in the motor speed. The proposed technique, therefore, controls the zero-sequence voltage as a function of the inverter output frequency; as a result, a stable motor drive and reduction in the common-mode current are realized simultaneously. Simulation and experimental results prove the validity of the proposed technique.

• 出版日期2015-8