Lossless Snubber with Minimum Voltage Stress for Continuous Current Mode Tapped-Inductor Boost Converters for High Step-up Applications

Jeong-il Kang; Sang-Kyoo Han; Jonghee Han

Lossless Snubber with Minimum Voltage Stress for Continuous Current Mode Tapped-Inductor Boost Converters for High Step-up Applications

Jeong-il Kang

Sang-Kyoo Han

Jonghee Han

Vol. 14, No. 4, pp. 621-631, Jul. 2014

10.6113/JPE.2014.14.4.621

Current control

DC-DC power conversion

Efficiency

Snubber circuit

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Abstract

To invigorate the tapped-inductor boost (TIB) topology in emerging high step-up applications for off-grid products, a lossless snubber consisting of two capacitors and three diodes is proposed. Since the switch voltage stress is minimized in the proposed circuit, it is allowed to use a device with a lower cost, higher efficiency, and higher availability. Moreover, since the leakage inductance is fully utilized, no effort to minimize it is required. This allows for a highly productive and cost-effective design of the tapped-inductor. The proposed circuit also shows a high step-up ratio and provides relaxation of the switching loss and diode reverse-recovery. In this paper, the operation is analyzed in detail, the steady-state equation is derived, and the design considerations are discussed. Some experimental results are provided to confirm the validity of the proposed circuit.

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Cite this article

[IEEE Style]

J. Kang, S. Han, J. Han, "Lossless Snubber with Minimum Voltage Stress for Continuous Current Mode Tapped-Inductor Boost Converters for High Step-up Applications," Journal of Power Electronics, vol. 14, no. 4, pp. 621-631, 2014. DOI: 10.6113/JPE.2014.14.4.621.

[ACM Style]

Jeong-il Kang, Sang-Kyoo Han, and Jonghee Han. 2014. Lossless Snubber with Minimum Voltage Stress for Continuous Current Mode Tapped-Inductor Boost Converters for High Step-up Applications. Journal of Power Electronics, 14, 4, (2014), 621-631. DOI: 10.6113/JPE.2014.14.4.621.