Studies of regenerative braking in electric vehicle

Yoong, M.K; Gan, Yi; Gan, Guo Dong; Leong, C.K.; Phuan, Z.Y; Cheah, B.K; Chew, Kuew Wai

doi:10.1109/student.2010.5686984

Cited by 115 publications

(42 citation statements)

References 8 publications

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“…These periods include the beginning of the ground phases and the ending of the swing phase where the torques and angular velocities are in the opposite direction to each other. Similar to the regenerative braking in electric cars, it is desirable to recover that energy rather than dissipating it in dampers and brakes [15].…”

Section: B Principle 2:energy Regenerationmentioning

confidence: 99%

Design Principles for Energy-Efficient Legged Locomotion and Implementation on the MIT Cheetah Robot

Seok

Wang

Chuah

et al. 2015

IEEE/ASME Trans. Mechatron.

424

228

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Abstract-This paper presents the design principles for highly efficient legged robots, the implementation of the principles in the design of the MIT Cheetah, and the analysis of the high-speed trotting experimental results. The design principles were derived by analyzing three major energy-loss mechanisms in locomotion: heat losses from the actuators, friction losses in transmission, and the interaction losses caused by the interface between the system and the environment. Four design principles that minimize these losses are discussed: employment of high torque density motors, energy regenerative electronic system, low loss transmission, and a low leg inertia. These principles were implemented in the design of the MIT Cheetah; the major design features are large gap diameter motors, regenerative electric motor drivers, single-stage low gear transmission, dual coaxial motors with composite legs, and the differential actuated spine. The experimental results of fast trotting are presented; the 33kg robot runs at 22 km/h (6 m/s). The total power consumption from the battery pack was 973 watts and resulted in a total cost of transport of 0.5, which rivals running animals' at the same scale. The 76% of total energy consumption is attributed to heat loss from the motor, and the 24% is used in mechanical work, which is dissipated as interaction loss as well as friction losses at the joint and transmission.

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Section: B Principle 2:energy Regenerationmentioning

confidence: 99%

Design Principles for Energy-Efficient Legged Locomotion and Implementation on the MIT Cheetah Robot

Seok

Wang

Chuah

et al. 2015

IEEE/ASME Trans. Mechatron.

424

228

View full text Add to dashboard Cite

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“…Converting kinetic energy available during braking into electrical energy supplied to an energy storage system is a formidable way to boost range capabilities of EVs and to reduce their energy storage source sizes [10]. In this way, reference [10] pointed out that the regenerative braking can increase the EV range in the interval of 8-25%.…”

Section: Introductionmentioning

confidence: 99%

“…In this way, reference [10] pointed out that the regenerative braking can increase the EV range in the interval of 8-25%. Experiment in reference [11] indicates that hybrid power system can improve the efficiency of braking energy recovery and decreases the demanding power of the battery.…”

Section: Introductionmentioning

confidence: 99%

A new strategy for battery and supercapacitor energy management for an urban electric vehicle

Azizi

Radjeai

2017

Electr Eng

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A new strategy of energy management between battery and supercapacitors for an urban electric vehicle is suggested in this paper. These two sources are connected in parallel to the DC bus through two bidirectional DC-DC converters enabling separate control over the power flow of each source. Vehicle dynamics with load torque applied on the shaft motor is to be considered. This strategy of energy management permits dividing energy between the two sources depending on the state of charge of each source as well as on the vehicle displacement state such as stopping, acceleration, cruising down and uphill, and deceleration. The aim of the proposed strategy is the best use of energy through maximizing the use of SCs by transferring energy from batteries to SCs during the standstill phase or when the load applied to the vehicle is small; supercapacitors will then be ready in critical situations such as rapid acceleration or in high hills climbing. In order to validate the control design and evaluate our energy management strategy performance, a simulation of an urban hybrid electric vehicle movement with the Matlab/Simulink software is implemented.

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“…Hence, there have been ever increasing efforts in determining different technologies to improve fuel efficiency. One of these trends has been a return to electrical vehicles, currently mainly through hybrid vehicles [1]. In either of these cases, electrical motors are used for the propulsion of the vehicle.…”

Section: Introductionmentioning

confidence: 99%

Fully Regenerative braking and Improved Acceleration for Electrical Vehicles

Melis¹,

Chishty²

2013

IJSED

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Generally, car brake systems use hydraulic brake technology, which converts the excess of kinetic energy into heat, effectively resulting in an energy loss. Regenerative braking technology focuses on converting this kinetic energy of the decelerating vehicle back into electrical energy that can then be reused for example during acceleration. Current hybrid vehicles are equipped with such regenerative braking technology, which makes them particularly interesting for situations with frequent deceleration, like city traffic. However, the technology used in these vehicles has its limitations and therefore does not stand on its own, but is always assisted with conventional hydraulic brakes. This paper looks at removing this limitation and allowing a vehicle to fully rely on regenerative braking technology to deal with any braking situation ranging from simple slow down to emergency stops. To enable this, multiple generators with different gear ratios are used. The additional benefit of this construction is that, by introducing the appropriate control circuit, the generators can be used as electrical engines. Since these motors are connected with different gear ratios there is a more consistent acceleration at any speed. The paper shows that the overall efficiency of the system is very close to the efficiency of the generators used while achieving braking performance similar to conventional braking mechanisms.

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Studies of regenerative braking in electric vehicle

Cited by 115 publications

References 8 publications

Design Principles for Energy-Efficient Legged Locomotion and Implementation on the MIT Cheetah Robot

Design Principles for Energy-Efficient Legged Locomotion and Implementation on the MIT Cheetah Robot

A new strategy for battery and supercapacitor energy management for an urban electric vehicle

Fully Regenerative braking and Improved Acceleration for Electrical Vehicles

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