基于二极管钳位五电平技术的LCL型感应电能传输系统谐波分析

doi:10.19595/j.cnki.1000-6753.tces.161582

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Abstract The single-phase H-bridge inverter is usually used in inductive power transfer (IPT) system. With the constraints of the power electronic device capacity and the cost, the output power of single-phase H-bridge inverter is limited. To achieve higher power output, this paper applies diode-clamped five-level inverter to IPT system. The working principle of clamped diode multilevel technology in the IPT system is analyzed. The relationships of harmonic with phase-shift angle and pulse width are constructed using Fourier series expressions of the primary side output voltage to find the optimal operation point. Compared with single-phase H-bridge inverter, the controlling strategy proposed can eliminate the 3rd and 5th harmonics of output voltage, reduce the total harmonic distortion (THD) and increase the output power of IPT system. Finally, a prototype of proposed algorithm is built and the analysis is verified by experiments.

Key words： Inductive power transfer (IPT), clamped diode, five-level inverter, total harmonic distortion, harmonics elimination

Received: 28 September 2016 Published: 01 August 2017

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TM724

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