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Development of High Power Density DC-DC Converter for IMA

Article of Honda R&D Technical Review Vol.17 No.1

Summary

A smaller and more powerful 12V DC-DC converter has been developed for Honda’s Integrated Motor Assist (IMA) system. Low breakdown voltage FETs and a beam lead diode module in combination with high-efficiency soft switching circuits have reduced energy loss to increase the efficiency of the unit. Heat dissipation simulations were employed to optimize the component layout for efficient cooling. The new unit employs a digital signal processor, and the reduction in component numbers enabled by digital control has resulted in a 40% reduction in the size of the circuit board of the control section. The application of these technologies has enabled the unit volume to be decreased by 17% while output current has been increased by 60% against the former model.

Reference

(1) Fukuo, K., Fujimura, A., Saito, M., Tsunoda, K., Takiguchi, S.: Development of the Ultra-Low-Fuel-Consumption Hybrid Car- INSIGHT, HONDA R&D Technical Review, Vol. 11, No. 2, p. 1-8
(2) Matsuki, M., Wakashiro, T., Kamiyama, T., Sato, T., Kaku, T., Kanda, M.: Development of a New Power Train for the Civic Hybrid, Honda R&D Technical Review, Vol. 14, No. 1, p. 39-48
(3) Aitaka, K., Hosoda, M., Nomura, T.: Development of Intelligent Power Unit for Civic Hybrid, Honda R&D Technical Review, Vol. 14, No. 2, p. 83-90
(4) Oshikata, T.: DSP niyoru digital dengen no jitsugen, SHINDENGEN TECHNICAL INFORMATION FILE “PASSWORD”, Vol. 04-13 (2004) (in Japanese)
(5) Matsuda, Y.: Koukouritu full bridge gata DC/DC converter, SHINDENGEN TECHNICAL INFORMATION FILE “PASSWORD”, Vol. 02-15 (2002) (in Japanese)
(6) Harada, K., Ninomiya, T., Kobunn, K.: Isouseigyo converter, Switching converter no kiso, CORONA PUBLISHING, p. 38 (1999) (in Japanese)

Author (organization or company)

Iwao SHIMANE(Tochigi R&D Center)、Kosuke OGURI(Tochigi R&D Center)

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