Abstract
This paper presents a fast response wireless power delivery system with open loop dynamic transmitter voltage scaling technique to keep power efficiency in wide load range. In this technique, according to change of receiver side power consumption, the driving voltage of the transmitter (TX) coil is properly adjusted to control transmission power. The transmitting power and switching loss can be reduced in proportion to the square of the driving voltage. Therefore, it can improve power efficiency. To enhance power control speed, the driving voltage is not locally regulated but automatically determined by the feedback loop of the total WPT system. Fabricated test chips in 180-nm LDMOS process achieved maximum power efficiency of 50.9% when the output power is 0.5W. The output power ranges from 0.03W to 0.5W. The output voltage ripple is kept within 3.5% even when the output power is abruptly changed by one order of magnitude.
| Original language | English |
|---|---|
| Title of host publication | 2017 IEEE MTT-S International Microwave Symposium, IMS 2017 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 315-317 |
| Number of pages | 3 |
| ISBN (Electronic) | 9781509063604 |
| DOIs | |
| Publication status | Published - 2017 Oct 4 |
| Event | 2017 IEEE MTT-S International Microwave Symposium, IMS 2017 - Honololu, United States Duration: 2017 Jun 4 → 2017 Jun 9 |
Other
| Other | 2017 IEEE MTT-S International Microwave Symposium, IMS 2017 |
|---|---|
| Country | United States |
| City | Honololu |
| Period | 17/6/4 → 17/6/9 |
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Keywords
- Magnetically coupled resonant
- Printed spiral resonator
- Wireless power transfer
ASJC Scopus subject areas
- Radiation
- Condensed Matter Physics
- Electrical and Electronic Engineering
Cite this
Open loop dynamic transmitter voltage scaling for fast response and wide load range power efficient WPT system. / Kawajiri, Toru; Ishikuro, Hiroki.
2017 IEEE MTT-S International Microwave Symposium, IMS 2017. Institute of Electrical and Electronics Engineers Inc., 2017. p. 315-317 8059107.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Open loop dynamic transmitter voltage scaling for fast response and wide load range power efficient WPT system
AU - Kawajiri, Toru
AU - Ishikuro, Hiroki
PY - 2017/10/4
Y1 - 2017/10/4
N2 - This paper presents a fast response wireless power delivery system with open loop dynamic transmitter voltage scaling technique to keep power efficiency in wide load range. In this technique, according to change of receiver side power consumption, the driving voltage of the transmitter (TX) coil is properly adjusted to control transmission power. The transmitting power and switching loss can be reduced in proportion to the square of the driving voltage. Therefore, it can improve power efficiency. To enhance power control speed, the driving voltage is not locally regulated but automatically determined by the feedback loop of the total WPT system. Fabricated test chips in 180-nm LDMOS process achieved maximum power efficiency of 50.9% when the output power is 0.5W. The output power ranges from 0.03W to 0.5W. The output voltage ripple is kept within 3.5% even when the output power is abruptly changed by one order of magnitude.
AB - This paper presents a fast response wireless power delivery system with open loop dynamic transmitter voltage scaling technique to keep power efficiency in wide load range. In this technique, according to change of receiver side power consumption, the driving voltage of the transmitter (TX) coil is properly adjusted to control transmission power. The transmitting power and switching loss can be reduced in proportion to the square of the driving voltage. Therefore, it can improve power efficiency. To enhance power control speed, the driving voltage is not locally regulated but automatically determined by the feedback loop of the total WPT system. Fabricated test chips in 180-nm LDMOS process achieved maximum power efficiency of 50.9% when the output power is 0.5W. The output power ranges from 0.03W to 0.5W. The output voltage ripple is kept within 3.5% even when the output power is abruptly changed by one order of magnitude.
KW - Magnetically coupled resonant
KW - Printed spiral resonator
KW - Wireless power transfer
UR - http://www.scopus.com/inward/record.url?scp=85032482109&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85032482109&partnerID=8YFLogxK
U2 - 10.1109/MWSYM.2017.8059107
DO - 10.1109/MWSYM.2017.8059107
M3 - Conference contribution
SP - 315
EP - 317
BT - 2017 IEEE MTT-S International Microwave Symposium, IMS 2017
PB - Institute of Electrical and Electronics Engineers Inc.
ER -