Analytical design procedure for resonant inductively coupled wireless power transfer system with class-DE inverter and class-E rectifier

Abstract

This paper presents a resonant inductive coupling wireless power transfer (RIC-WPT) system with a class-DE and class-E rectifier along with its analytical design procedure. By using the class-DE inverter as a transmitter and the class-E rectifier as a receiver, the designed WPT system can achieve a high power-conversion efficiency because of the class-E ZVS/ZDS conditions satisfied in both the inverter and the rectifier. In the simulation results, the system achieved 79.0 % overall efficiency at 5 W (50 Ω) output power, coupling coefficient 0.072, and 1 MHz operating frequency. Additionally, the simulation results showed good agreement with the design specifications, which indicates the validity of the design procedure.

Właściwości układu bezprzewodowego przesyłu energii elektrycznej przy uwzględnieniu odkształceń prądów

“…W literaturze znajdują się opisy metod projektowania układów WPT z różnego rodzaju przekształtnikami, np. falownikiem klasy DE i z prostownikiem klasy E [10], falownikiem klasy DE i z prostownikiem mostkowym [11] lub falownikiem klasy D bez prostownika (obciążenie rezystancyjne) [12]. Większość prezentowanych metod projektowania opiera się wyłącznie na analizie podstawowej harmonicznej (przebiegach sinusoidalnych) oraz istotnym uproszczeniu względem odbiornika, który zastępowany jest rezystorem w obwodzie zmiennoprądowym.…”

An Overview of Resonant Circuits for Wireless Power Transfer

“…By combining the lower switching stress of Class D and high efficiency of Class E [46], the Class DE topology is created as shown in Figure 4c. The Class DE inverter is quite similar to the Class D inverter, only with two additional parallel-connected capacitors [47]. Thus, the Class DE inverter realizes low switching voltage within the DC supply to reduce the switching losses.…”

“…The Class DE inverter is quite similar to the Class D inverter, only with two additional parallel-connected capacitors [47]. Thus, the Class DE inverter realizes low switching voltage within the DC supply to reduce the switching losses.…”

A Critical Analysis of a Wireless Power Transmission (WPT) with an Improvement Method for a Non-Radiative WPT

“…This is generally classified as short-range and mid-range nonradiative WPT [6]. For short-range, the distance between the load and source is usually only a few centimeters as they are almost attached to each other [7]. The induction motor is an example of a short-range non-radiative power transfer where the rotor part is detached inductively with the stator part.…”