TY - GEN
T1 - Adaptive Self-Tuned Mixed-Signal Controller IC for Resonant Wireless Power Transfer
AU - Abramov, Eli
AU - Peretz, Mor Mordechai
N1 - Publisher Copyright: © 2020 IEEE.
PY - 2020/3/1
Y1 - 2020/3/1
N2 - This paper introduces an adaptive self-tuned controller IC for resonant wireless power transfer (RWPT) systems. The new controller IC comprises an on-the-fly very-high-frequency tracking hardware with high-resolution and an independent high-resolution digital PWM-based (HR-DPWM) current programmed control. These facilitate precise frequency generation as well as adaptive tuning of the reactive components in the matching network, which translate into tight current/power regulation capabilities while retaining optimized power transfer conditions. This enables to effectively disengage the power delivery capabilities from the variations of the resonators, electrical circuits and wireless medium. A fully synthesizable digital two-loop controller has been realized through HDL tools, and several new IP blocks have been developed and described in-detail: a delay-line (DL) based phase detector, high-resolution digital controlled oscillator (DCO), HR-DPWM. To fully exploit the benefits of digital electronics, reduce power consumption and save area, the digital core of the controller has been designed through asynchronous architecture, eliminating the need of high-speed clock and its related architecture. The mixed-signal controller IC has been designed and implemented in 0.18 μm, resulting in total effective silicon area of 1.44 mm2. Post-layout results of the fabricated IC operating in closed-loop are provided, demonstrating the performance and benefits of the new controller for meeting the requirements of resonant-based WPT systems. In addition, to validate and verify the controller core prior to IC fabrication, the control algorithm has been implemented on FPGA. To demonstrate closed-loop operation of a wireless power system, an experimental LC resonant capacitive-based WTP system has been constructed. The effectiveness of the controller is well demonstrated and evaluated at the MHz range up to an airgap of 200 mm, validating adaptive self-tuned system.
AB - This paper introduces an adaptive self-tuned controller IC for resonant wireless power transfer (RWPT) systems. The new controller IC comprises an on-the-fly very-high-frequency tracking hardware with high-resolution and an independent high-resolution digital PWM-based (HR-DPWM) current programmed control. These facilitate precise frequency generation as well as adaptive tuning of the reactive components in the matching network, which translate into tight current/power regulation capabilities while retaining optimized power transfer conditions. This enables to effectively disengage the power delivery capabilities from the variations of the resonators, electrical circuits and wireless medium. A fully synthesizable digital two-loop controller has been realized through HDL tools, and several new IP blocks have been developed and described in-detail: a delay-line (DL) based phase detector, high-resolution digital controlled oscillator (DCO), HR-DPWM. To fully exploit the benefits of digital electronics, reduce power consumption and save area, the digital core of the controller has been designed through asynchronous architecture, eliminating the need of high-speed clock and its related architecture. The mixed-signal controller IC has been designed and implemented in 0.18 μm, resulting in total effective silicon area of 1.44 mm2. Post-layout results of the fabricated IC operating in closed-loop are provided, demonstrating the performance and benefits of the new controller for meeting the requirements of resonant-based WPT systems. In addition, to validate and verify the controller core prior to IC fabrication, the control algorithm has been implemented on FPGA. To demonstrate closed-loop operation of a wireless power system, an experimental LC resonant capacitive-based WTP system has been constructed. The effectiveness of the controller is well demonstrated and evaluated at the MHz range up to an airgap of 200 mm, validating adaptive self-tuned system.
KW - adaptive controller IC
KW - closed-loop wireless system
KW - impedance matching
KW - resonant power transfer
KW - selftuned system
KW - variable inductance
UR - http://www.scopus.com/inward/record.url?scp=85087750765&partnerID=8YFLogxK
U2 - 10.1109/APEC39645.2020.9124289
DO - 10.1109/APEC39645.2020.9124289
M3 - Conference contribution
T3 - Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
SP - 805
EP - 812
BT - APEC 2020 - 35th Annual IEEE Applied Power Electronics Conference and Exposition
T2 - 35th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2020
Y2 - 15 March 2020 through 19 March 2020
ER -