S-CLC Compensated Wireless Power Transfer With Pulse-Frequency-Modulation Control for Dimmable Low-Pressure Sodium Lamps

This article proposes and implements a wireless power transfer (WPT) with series-capacitor-inductor-capacitor (S-CLC) compensation network and pulse-frequency-modulation (PFM) control for dimmable low-pressure sodium (LPS) lamps. Considering the high-voltage ignition and long-time operation, the LPS lamp has the risk of causing electrocution, especially when operating in a humid environment. Thus, the wireless lighting is highly desirable since the LPS lamp can be completely isolated with maintenance-free under all-weather conditions. The proposed S-CLC compensation for WPT can directly drive the LPS lamp without utilizing any magnetic or electronic ballasts. In addition, the PFM control can achieve effective dimming control, reduced operating frequency, and zero-voltage switching (ZVS) concurrently. Theoretical calculations and experimental results are given to validate the feasibility of the proposed wireless lighting system.

Automated summary

This article introduces a wireless power transfer system with S-CLC compensation and PFM control for dimmable LPS lamps. The technology addresses the risks associated with high-voltage operation of LPS lamps in humid environments, while also providing maintenance-free lighting under all weather conditions. The proposed system achieves effective dimming control, reduced operating frequency, and ZVS for LPS lamps.