A novel autotransformer based 18-pulse rectifier circuit

Karnath, G.R.; Benson, Dewey; Wood, R.

doi:10.1109/apec.2002.989335

Cited by 46 publications

(19 citation statements)

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“…Theoretically, The more pulses a converter produce, the better performance of the input line currents will be. 12, 18, 24, 30-pulse rectifiers are proposed generally [6][7][8][9]. The 12-pulse rectifier not only owns the simpler circuit than other multi-pulse converters, but also is able to satisfy the requirements of most electric equipment.…”

Section: Introductionmentioning

confidence: 99%

Research of Phase-Shift Angle on the Differential Delta Auto-Connected Transformer

Wang¹,

Chen²,

Li³

et al. 2017

Proceedings of the 3rd Annual International Conference on Electronics, Electrical Engineering and Information Science (EEEIS 20

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Abstract. Using the traditional phase-shift angle, the differential delta-connected transformer is not able to boost voltage. Broadening the phase-shift angle of the autotransformer can boost its output voltage. But the greater phase-shift angle will increase the equivalent kilovolt ampere (KVA) rating as well. This paper analyzes the effect of phase-shift angle on the input currents and the equivalent (KVA) rating of the differential delta-connected transformer. A novel phase-shift angle is proposed, with which the differential delta-connected transformer is suitable to be a step-up autotransformer, meanwhile, the equivalent KVA rating of the autotransformer is still smaller than the isolated transformer. Some simulation is carried out to verify the correctness of the analyses.

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Section: Introductionmentioning

confidence: 99%

Research of Phase-Shift Angle on the Differential Delta Auto-Connected Transformer

Wang¹,

Chen²,

Li³

et al. 2017

Proceedings of the 3rd Annual International Conference on Electronics, Electrical Engineering and Information Science (EEEIS 20

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“…This rectification approach has gained popularity due to its robust, rugged nature, reliability and simplicity in control. Different multipulse ac-dc converters configurations are reported in the literature [4][5] to reduce the line current harmonics. Multipulse converters have been used as an improved power quality utility interface in a variety of applications such as telecommunication power supplies, electric aircraft applications and variable frequency induction motor drives [6].…”

Section: Introductionmentioning

confidence: 99%

Power Quality Improvement using a 28-pulse AC-DC Converter for SMPS

Sudhakar¹

2013

IJIRSET

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ABSTRACT:In this paper a novel autoconnected transformer based 28-pulse ac-dc converter fed SMPS is designed to improve the power quality at the point of common coupling. It consists of two series connected 14-pulse ac-dc uncontrolled converters fed by seven phase shifted ac voltages. The behaviour of the converter is studied in MATLAB based simulation under various load conditions. It has been found that the % input ac mains current THD is less than 5% in the complete range of varying loads, with a power factor close to unity which meets the requirements of IEEE-519 standard. Thus, our proposed topology resulted in much reduction in % input mains current THD with enhanced power factor compared to conventional multi pulse ac-dc converter.

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“…Recently, Kamath et.al. [12] have reported 18-pulse converter, but THD of ac mains current in this 18-pulse converter is high even at full load (6.9%) and as load decreases, the THD increases further (13.1%THD at 50% load), thus violating the limits of IEEE Std. 519-1992.…”

Section: Introductionmentioning

confidence: 84%

Nine-Phase AC-DC Converter for Vector Controlled Induction Motor Drives

Singh

Bhuvaneswari²,

Garg³

2005 Annual IEEE India Conference - Indicon

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This paper presents the design and analysis of a multi-phase system for improving the power quality indices at the point of common coupling (PCC) in vector controlled induction motor drives (VCIMD's). An autotransformer has been designed suitable for producing the nine-phase voltages of same magnitude and having equal phase shift. The proposed 9-phase ac-dc converter is found capable of suppressing upto 17th harmonic in the supply current alongwith the power factor improvement close to unity in the wide operating range of the drive. The effect of load variation on VCIMD is also studied to demonstrate the effectiveness of the proposed ac-dc converter. A set of power quality indices on input ac mains and on dc bus for a VCIMD fed from existing 6-pulse and proposed 9-phase ac-dc converter are also presented for an easy comparison of their performance.

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A novel autotransformer based 18-pulse rectifier circuit

Cited by 46 publications

References 0 publications

Research of Phase-Shift Angle on the Differential Delta Auto-Connected Transformer

Research of Phase-Shift Angle on the Differential Delta Auto-Connected Transformer

Power Quality Improvement using a 28-pulse AC-DC Converter for SMPS

Nine-Phase AC-DC Converter for Vector Controlled Induction Motor Drives

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