Design and Implementation of a Low-Power Low-Cost Digital Current-Sink Electronic Load ‡

Wei Jiang, Jieyun Wang, Qianlong Wang, Song Xu, Seiji Hashimoto and Zhong Liu
Additional contact information
Wei Jiang: Department of Electrical Engineering, Yangzhou University, Yangzhou 225000, China
Jieyun Wang: Department of Electrical Engineering, Yangzhou University, Yangzhou 225000, China
Qianlong Wang: Department of Electrical Engineering, Yangzhou University, Yangzhou 225000, China
Song Xu: Division of Electronics and Informatics, Gunma University, Kiryu 376-8515, Japan
Seiji Hashimoto: Division of Electronics and Informatics, Gunma University, Kiryu 376-8515, Japan
Zhong Liu: State Grid Yangzhou Power Supply Company, Yangzhou 225000, China

Energies, 2019, vol. 12, issue 13, 1-14

Abstract: Electronic load (e-load) is essential equipment for power converter performance test, where a designated load profile is executed. Electronic load is usually implemented with the analog controller for fast tracking of the load profile reference. In this paper, a low-power low-cost electronic load is proposed. MOSFETs (metal-oxide-semiconductor field-effect transistors) are used as the power consumption devices, which are regulated to the active region as controlled current-sink. In order to achieve fast transient response using the low-cost digital signal controller (DSC) PWM peripherals, the interleaving PWM method is proposed to achieve active current ripple mitigation. To obtain the system open-loop gain for current-sink operation, an offline digital system identification method, followed by model reduction, is proposed by applying Pseudo-Random Binary Sequence (PRBS) excitation. Pole-zero cancelation method is used in the control system design and later implemented in a DSC. The prototype is built and tested, in which meaningful testing scenarios under constant current-sink mode, pulse current sink mode, and double line-frequency current mode are verified. The experimental results indicate that the proposed e-load can sink pre-programmed current profile with well-attenuated ripple for static and dynamic load testing, and is applicable to fully digitalized power testing equipment.

Keywords: electronic load; multi-phase; current mode; system identification (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/12/13/2611/pdf (application/pdf)
https://www.mdpi.com/1996-1073/12/13/2611/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:12:y:2019:i:13:p:2611-:d:246381

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().