A low‐rating 40‐pulse AC–DC rectifier based on a new passive harmonic mitigation circuit

Abstract

A novel 40‐pulse autotransformer rectifier is proposed to reduce total harmonic distortion (THD) of the input current in aircraft electrical power systems. The 40‐pulse rectifier (40PR) includes a passive harmonic reduction circuit (PHMC) with a low kVA rating (about 0.95% of the load power) to enhance the performance of the conventional 40PR. This PHMC is based on 2 harmonic suppression circuits and contains four tapped reactor and 4 auxiliary diodes. 50 Hz simulations of the improved 40PR indicate that THD of the input current and voltage is less than 2%, which meets the IEEE‐519 standard. In addition, without using any input and output filters, input current harmonic components at 400–800 Hz are less than the requirements mentioned in the DO‐160G and MIL‐STD‐704F standards. The suggested PHMC can easily be implemented. A prototype is developed to verify the proposed design. A good agreement can be seen in simulation and experimental results.

A novel pulse multiplication circuit for reducing harmonic distortion of 12 pulse rectifiers in aircraft electrical power systems

“…Therefore, the input current THD proposed rectifier and the kilovolt-ampere rating of the proposed rectifier are lower than other existing MPRs. According to this table, it can be said that the proposed rectifier compared to rectifiers with a high number of pulses (36,40,44, and 72-pulse rectifiers) can perform well with fewer components, less design complexity, kVA rating, and lower cost and more suitable performance to reduce harmonic distortion. Finally, the rectifier is proposed as a suitable technical and economic solution for the rectification process in industrial applications.…”

An Accelerator Power Supply Based on Multi-Pulse Rectifier

“…In [9][10][11], 18-pulse rectifiers based on 9-output transformers are proposed, resulting in a decrease in the THD of input current from 15.2% to 10.1% compared to the 12-pulse rectifier. In [12][13][14][15][16], 20-pulse rectifiers based on 10-output transformers are proposed, with the THD of input current reaching approximately 9.1%. As indicated by [9][10][11][12][13][14][15][16], multi-phase transformers do enhance the power quality of rectifiers to some extent compared to 12-pulse rectifiers; however, a substantial portion of the harmonics remains unmitigated.…”

“…In [12][13][14][15][16], 20-pulse rectifiers based on 10-output transformers are proposed, with the THD of input current reaching approximately 9.1%. As indicated by [9][10][11][12][13][14][15][16], multi-phase transformers do enhance the power quality of rectifiers to some extent compared to 12-pulse rectifiers; however, a substantial portion of the harmonics remains unmitigated. The more severe the harmonic pollution at the input, the more pronounced the interference at the output.…”