A High-Performance PWM Algorithm for Common-Mode Voltage Reduction in Three-Phase Voltage Source Inverters

Date

2011-07-01

Author

Hava, Ahmet Masum

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A high-performance pulsewidth modulation (PWM) algorithm with reduced common-mode voltage (CMV) and satisfactory overall performance is proposed for three-phase PWM inverter drives. The algorithm combines the near-state PWM (NSPWM) method that has superior overall performance characteristics at high modulation index, and MAZSPWM, a modified form of the active zero-state PWM method (AZSPWM1), which is suitable for low modulation index range of operation. Since AZSPWM1 has line-to-line voltage pulse reversals with small zero-voltage time intervals, in its naive form, it causes overvoltages, in particular in long-cable motor drive applications. Obtained by reorganizing the duty cycles of the utilized voltage vectors of AZSPWM1, MAZSPWM has sufficiently long zero-voltage time intervals between pulse reversals such that during pulse reversals, overvoltages are avoided. The combined algorithm performs satisfactorily throughout the inverter operating range and the transition from NSPWM to MAZSPWM and vice versa is seamless. The performance of the proposed algorithm is proven by theory, computer simulations, and detailed laboratory experiments. The paper also shows that the proposed reduced CMV PWM algorithm is effective in reducing the motor leakage current, and it is most beneficial when a small common-mode inductor is included in the drive.

Subject Keywords

Discontinuous PWM (DPWM), Common-mode voltage (CMV), Common-mode current (CMC), Algorithm, Active zero-state PWM (AZSPWM), Pulsewidth modulation (PWM), Space vector PWM (SVPWM), Space vector, Overvoltage, Near-state PWM (NSPWM), Long cable, Modulation, Inverter

URI

https://hdl.handle.net/11511/40593

Journal

IEEE TRANSACTIONS ON POWER ELECTRONICS

DOI

https://doi.org/10.1109/tpel.2010.2100100

Collections

Department of Electrical and Electronics Engineering, Article

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Citation Formats

A. M. Hava, “A High-Performance PWM Algorithm for Common-Mode Voltage Reduction in Three-Phase Voltage Source Inverters,” IEEE TRANSACTIONS ON POWER ELECTRONICS, pp. 1998–2008, 2011, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/40593.