A Control Scheme to Mitigate the Dead-Time Effects in a Wireless Power Transfer System
| Autor: | Utkarsh D. Kavimandan, Burak Ozpineci, Veda P. Galigekere, Omer C. Onar, Satish M. Mahajan |
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| Rok vydání: | 2020 |
| Předmět: |
Scheme (programming language)
Computer science 020208 electrical & electronic engineering 05 social sciences Control (management) 02 engineering and technology Semiconductor device Dead time Power (physics) 0202 electrical engineering electronic engineering information engineering Electronic engineering Inverter 0501 psychology and cognitive sciences Wireless power transfer computer 050107 human factors computer.programming_language Voltage |
| Zdroj: | 2020 IEEE Applied Power Electronics Conference and Exposition (APEC). |
| Popis: | In practice, a dead-time is always provided between the complementary switching instances of the inverter phase-leg devices. At higher operating frequencies, the dead-time issues in wireless power transfer (WPT) systems become critical, especially as the power level increases. In certain operating conditions, the dead-time effect in wireless power transfer system affects the switching characteristics. Consequently, the switching losses in the power semiconductor devices increase and also impact the efficiency of the overall system. In this paper, a simple control scheme is proposed to eliminate the dead-time effect (or voltage polarity reversal) in the WPT inverter. The proposed control scheme monitors the inverter output voltage, and the switching frequency is auto-tuned to eliminate the undesired switching instances in the inverter voltage. The proposed control scheme is validated using the closed-loop simulations in PLECS, and the experimental results on a 5.6 kW WPT prototype are also presented. After eliminating the voltage-polarity-reversal at the inverter output, the inverter losses were reduced by ∼40%, and the overall system losses were reduced by ∼17%. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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