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Small Size Power Control Unit for 2020 Model Year FIT

Article of Honda R&D Technical Review Vol.32 No.2


Honda has developed a third-generation power control unit for compact cars for the 2020 model year FIT.
Downsizing was achieved by employing RC-IGBTs in the power semiconductors used in the power module, which is the main component of the power control unit. This reduced the longitudinal length by 12%. The control boards that were divided into a motor ECU (control board) and a gate driver (drive circuit board) in the second-generation unit were integrated to reduce the wire harnesses that connect each board, achieving further downsizing. The capacitance of the capacitor was reduced by 50% by enhancing the current followability of voltage control unit control. The application of these technologies realized development of a PCU with output power up to 267 kVA that achieves a volume of 8.5 L even with the 12 V DC-DC converter incorporated into the PCU, which enables mounting in a compact car.


(1) Kuroki, J., Otsuka, H.: Development of Motor and PCU for a SPORT HYBRID i-MMD System, Honda R&D Technical Review, Vol. 25, No. 2, p. 42-48
(2) Kashimura, Y., Negoro, Y.: Transmission-Mounted Power Control Unit with High Power Density for Two-Motor Hybrid System, SAE Technical Paper, 2016-01-1223, (2016)
(3) Ozuchi, Y., Tomokage, R.: Transmission-Mounted Power Control Unit Including 12-Volt DC-DC Converter for Two-Motor Hybrid System, SAE Technical Paper, 2018-01-0457, (2018)
(4) Nonaka, K., Takebayashi, K., Kashimura, Y., Ueno, Y., Kondo, Y.: Development of New Power Control Unit with Small Size and Low Cost for Small Hybrid Vehicle with Two-motor Hybrid System, SAE Technical Paper, 2020-01-0458, (2020)

Author (organization or company)

Hitoshi NISHIO(Innovative Research Excellence Power Unit & Energy)、Yasuhiko KONDO(Honda Motor Co., Ltd.)、Yuichiro UENO(Honda Motor Co., Ltd.)、Kenichi NONAKA(Keihin Corporation)、Yukiya KASHIMURA(Keihin Corporation)、Kenichi TAKEBAYASHI(Keihin Corporation)