Wireless Power Supply Design for Precharging Circuit of SST in Railway Vehicles
- Title
- Wireless Power Supply Design for Precharging Circuit of SST in Railway Vehicles
- Author
- 이은수
- Keywords
- Rail transportation; Batteries; Insulation; Power supplies; Power transformer insulation; Wireless communication; Relays; Frequency modulation control; high voltage insulation; precharging circuit; railway vehicle; solid-state-transformer (SST); wireless power supply (WPS); wireless power transfer (WPT)
- Issue Date
- 2021-09
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Citation
- IEEE TRANSACTIONS ON POWER ELECTRONICS; SEP 2021, 36 9, p9837-p9853, 17p.
- Abstract
- Frequency modulation control-based wireless power
supply (WPS) system adopted for the operating signals of a
precharging circuit in solid-state-transformer (SST) is proposed
in this article. To guarantee high voltage insulation capability
between trolley line and railway vehicle and to decrease the voltage
level of railway feeder, a large and heavy main transformer (MTr)
operating at 50/60 Hz is conventionally used in railway vehicles.
The SST, operating at high frequency for compact size and active
control of bidirectional power flow, is an emerging technology
in order to substitute a conventional MTr. At initial start of the
SST, it is important to slowly charge the capacitor voltages by a
precharging circuit connected in series with the trolley line. To
operate a precharging circuit in the SST, the proposed WPS system
can be utilized for high voltage insulation capability in this article.
To transfer operating signals wirelessly through the air, long slim
dipole coils for transmitter (Tx) and receiver (Rx) are adopted
to fabricate a small size of the whole WPS system. The proposed
WPS can be operated at a maximum power efficiency point w.r.t.
the wide ranges of the coil distance and load conditions by the
proposed frequency modulation control method in the primary
side. A 3–30W prototype of the Tx and Rx coils for the proposed
WPS were fabricated and verified by simulation and experiments,
showing that 84.0% and 80.2% of high dc–dc efficiencies for PL =
30 and 12W at dc = 30mm, respectively. As a result, the proposed
control method without communication circuits between Tx and
Rx sides has been successfully verified when coil distance and load
resistance are widely varied.
- URI
- https://ieeexplore.ieee.org/document/9354042https://repository.hanyang.ac.kr/handle/20.500.11754/170538
- ISSN
- 08858993; 19410107
- DOI
- 10.1109/TPEL.2021.3058415
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > ELECTRICAL ENGINEERING(전자공학부) > Articles
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