Research on Constant Voltage Output MC-WPT System

doi:10.16628/j.cnki.2095-8188.2021.12.003

Abstract

Abstract:

A constant voltage output magnetic coupled wireless power transfer(MC-WPT) system is designed to solve the problem that the output voltage can not be constant due to the wide input voltage range,large load fluctuation and mutual inductance variation in some special application scenarios.The system uses LCC-S type compensation topology,cascades phase-shifted full-bridge inverters and Boost converters as voltage regulation circuit,deduces the system output voltage expression,establishes the system mathematical model,designs a closed-loop controller,and achieves a constant voltage output when the system has a wide range of input voltage,large range of load and mutual inductance.The feasibility of the design scheme of this constant voltage output MC-WPT system is verified by the simulation and experiment.

Key words: MC-WPT, wide input voltage, load fluctuation, mutual inductance change, constant voltage output

CLC Number:

TM724

YIN Yong, ZHU Lujing, WANG Chengliang, XIAO Yuhua. Research on Constant Voltage Output MC-WPT System[J]. LOW VOLTAGE APPARATUS, 2021, 0(12): 13-19.

Figures/Tables 16

References 16

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参数	数值	参数	数值
L₀/μH	175	L_S/μH	643.3
R_L0/Ω	0.02	R_S/Ω	2.1
C₀/μF	240	C_S/nF	1.75
L_P/μH	494.6	C₁/μF	220
R_P/Ω	1.5	R_L/Ω	188.5
C_P/nF	2.42	f_dc/kHz	150
L_f/μH	31.9	f_inv/kHz	150
C_f/nF	35.3

耦合距离/cm	互感/μH
5.0	117.3
7.5	88.4
10.0	53.8