Abstract
This paper proposes a simple 36-pulse diode rectifier with an unconventional interphase reactor (IPR) and single-phase full-wave rectifier (SFR). The primary winding of the unconventional IPR is double tapped and the secondary winding is connected with SFR. The operation mode of the unconventional IPR is analyzed, and the optimal tap ratio and turn ratio of the unconventional IPR are designed from both viewpoints of input line current and load voltage. With the optimal parameters of the unconventional IPR, the proposed rectifier extends the conventional 24-pulse rectifier operation to 36-pulse operation and draws near sinusoidal input line currents, the total harmonic distortion (THD) of which is about 5.035%. The kVA rating of the unconventional IPR is about 2.6% of the output power. Compared with the conventional 36-pulse rectifier with triple-tapped IPR, the proposed 36-pulse rectifier is easy and simple to implement instead of using control circuits. Experiment results are provided to verify the theoretical analysis.
Highlights
The multipulse rectifier (MPR) technique is one of the most important and commonly used methods in electrochemical, high-voltage dc transmission, aircraft converter systems, plasma torches, and so on [1,2,3]
The optimal turn ratio of the unconventional interphase reactor (IPR) is designed in order to ensure the proposed MPR operating as 36-pulse rectifier and minimize the input line current total harmonic distortion (THD)
MPR operates as 24-pulse rectifier and THD of ia is changing from 7.52% to 15.15% as parameter ααmm
Summary
The multipulse rectifier (MPR) technique is one of the most important and commonly used methods in electrochemical, high-voltage dc transmission, aircraft converter systems, plasma torches, and so on [1,2,3]. There are two common ways to increasing the pulse number, one is to augment the output phase number of phase-shift transformer, and the other way is to install the auxiliary harmonic reduction circuit at the dc or ac side of the MPR. When the double-tapped IPR is used, the rectifier can effectively eliminate (12k ± 1)th (k is odd number) harmonics, the theoretical THD of input line current is about. An auxiliary single-phase full-wave rectifier is installed with the secondary winding of the proposed IPR, and the primary winding is central tapped This modification extends the conventional four-star 12-pulse operation to. When the unconventional IPR is designed optimally, the proposed 36-pulse rectifier operates normally and simultaneously increases the pulse number of the load voltage and step number of the input line current. The THD of input line current is less than 4% due to the leakage inductance of autotransformer and inductance of IPR
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
