Driving range extension by series chopper power train of EV with optimized dc voltage profile

Takeda, M.; Motoi, Naoki; Guidi, Giuseppe; Tsuruta, Yukinori; Kawamura, Atsuo

doi:10.1109/iecon.2012.6389429

Cited by 12 publications

(12 citation statements)

References 8 publications

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“…In the previous paper [1], the profile of the chopper output voltage was optimized for high efficiency. In addition, the decrease of the energy consumption was shown.…”

Section: Atsuo Kawamuramentioning

confidence: 99%

Large driving range increase of series chopper based power train using motor test bench

Hosoyamada

Takeda

Motoi

et al. 2014

2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE ASIA)

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Authors proposed the series chopper based power train aimed for the extension of the driving range. In previous paper II], under the condition of the constant DC-supply voltage, effectiveness of the optimization of the profile of the chopper output voltage was shown. However, the output voltage of the battery used in the actual EV varies depending on the state of charge (SOC). Because of this difference, the precise comparison of the power train was not performed. In this paper, by emulating the battery including the internal resistance and output voltage dependency on SOC, the driving range is compared in the motor test bench. It is shown that the chopper output voltage adjustment depending on the rotor speed and the weight of the chopper has large effect on the driving range. In comparison to non-chopper power train, the driving range of the series chopper power train increases by 2.1 %. In addition, by decreasing the weight of the chopper by a half and zero, the driving range further extends by 1.4% and 3.0%.

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“…In the previous paper [1], the profile of the chopper output voltage was optimized for high efficiency. In addition, the decrease of the energy consumption was shown.…”

Section: Atsuo Kawamuramentioning

confidence: 99%

Large driving range increase of series chopper based power train using motor test bench

Hosoyamada

Takeda

Motoi

et al. 2014

2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE ASIA)

Self Cite

View full text Add to dashboard Cite

show abstract

“…In the high speed regions, the previous paper (8) showed the maximum efficiency achieved by applying the minimum voltage for running without the flux weakening control for the inverter. Based on the above, the optimized chopper output voltage profile is obtained and shown in Fig.…”

Section: (B)mentioning

confidence: 99%

“…This section shows the method optimizing the chopper output voltage profile using the buck-boost chopper on the series chopper power train (8) . In the high speed regions, when the chopper output voltage is lower than the minimum voltage of the demanded running the speed, the inverter output voltage needs to be compensated by the flux weakening control.…”

Section: Optimization Of Chopper Output Voltagementioning

confidence: 99%

“…In the previous research (8) , by the experiment (a), the speed reference was changed from 10 km/h to 70 km/h, the torque was changed from 10 Nm to 70 Nm. And the inverter input voltage was changed from 10 V to 330 V. As a result, it turned out the inverter input voltage of the highest efficiency was the minimum voltage to achieve running the speed without the flux weakening control.…”

Section: (B)mentioning

confidence: 99%

“…In order to solve the first problem, the motor test bench was constructed in the previous research (8) . By using the motor test bench, many studies about the series chopper power train have been published (8)- (10) . These previous studies showed the following achievements;…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

High Efficiency Series Chopper Power Train for Electric Vehicles Using a Motor Test Bench

et al. 2015

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Many researchers have studied electric vehicles (EVs) for improving their efficiency to increase the driving range. The system design of an electrical power train has significant influence on the total driving range per charge and has been widely researched. A series chopper power train using a buck-boost chopper has been proposed as an electrical power train system. This electrical power train achieves high efficiency due to low and high inverter input voltage in the low and high speed regions, respectively. In previous studies, a high efficiency control optimizing the chopper output voltage was proposed, and a motor test bench with characteristics similar to actual EVs was constructed by using a battery emulation system with voltage variation characteristics, which occur due to the state of charge (SOC) and internal resistance. This paper shows the effects of optimizing the chopper output voltage on the driving range per charge in both efficiency estimation and the motor test bench experiment. This allows the verification of the usefulness of optimizing the chopper output voltage for increasing the efficiency. The results indicate an improvement of 0.9% and 2.7% in the driving range per charge during efficiency estimation and the motor test bench experiment, respectively.

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Range Extension Autonomous Driving for Electric Vehicle Based on Optimal Vehicle Velocity Profile in Consideration of Cornering

Ikezawa

Fujimoto

Kawano

et al. 2018

Electrical Engineering Japan

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Electric vehicles (EVs) have been intensively studied in the last decade due to their environment-friendly characteristics. However, the miles-per-charge of EVs is less than that of internal combustion engine vehicles. To improve the miles-per-charge, the authors' group proposed a Range Extension Autonomous Driving (READ) system that minimizes consumption energy by optimizing the velocity profile. However, conventional systems can be applied to driving on only straight roads. Therefore, this study extends READ system to be applied to driving not only on straight roads but also on curved roads by modeling the vehicle rotation motion and the cornering resistance. The effectiveness of the proposed method is verified by simulations and experiments.

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Driving range extension by series chopper power train of EV with optimized dc voltage profile

Cited by 12 publications

References 8 publications

Large driving range increase of series chopper based power train using motor test bench

Large driving range increase of series chopper based power train using motor test bench

High Efficiency Series Chopper Power Train for Electric Vehicles Using a Motor Test Bench

Range Extension Autonomous Driving for Electric Vehicle Based on Optimal Vehicle Velocity Profile in Consideration of Cornering

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