Energy Efficiency Improvement via Bus Voltage Control of Inverter for Electric Vehicles

Deng, Weiwen; Zhao, Yang; Wu, Jian

doi:10.1109/tvt.2016.2555990

Cited by 40 publications

(17 citation statements)

References 30 publications

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“…Motor losses mainly include mechanical losses, copper losses, iron losses and stray losses. Since stray losses are difficult to measure and control and account for a small percentage of the total loss [21], they are not considered in this study. In steady-state, the voltage balance equation of the d-q axis is as follows:…”

Section: Motor Loss Modelmentioning

confidence: 99%

Efficiency Optimization and Control Strategy of Regenerative Braking System with Dual Motor

Yang

Chen

et al. 2020

Energies

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The regenerative braking system of electric vehicles can not only achieve the task of braking but also recover the braking energy. However, due to the lack of in-depth analysis of the energy loss mechanism in electric braking, the energy cannot be fully recovered. In this study, the energy recovery problem of regenerative braking using the independent front axle and rear axle motor drive system is investigated. The accurate motor model is established, and various losses are analyzed. Based on the principle of minimum losses, the motor control strategy is designed. Furthermore, the power flow characteristics in electric braking are analyzed, and the optimal continuously variable transmission (CVT) speed ratio under different working conditions is obtained through optimization. To understand the potential of dual-motor energy recovery, a regenerative braking control strategy is proposed by optimizing the dynamic distribution coefficient of the dual-electric mechanism and considering the restrictions of regulations and the I curve. The simulation results under typical operating conditions and the New York City Cycle (NYCC) proposed conditions indicate that the improved strategy has higher joint efficiency. The energy recovery rate of the proposed strategy is increased by 1.18% in comparison with the typical braking strategy.

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Section: Motor Loss Modelmentioning

confidence: 99%

Efficiency Optimization and Control Strategy of Regenerative Braking System with Dual Motor

Yang

Chen

et al. 2020

Energies

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“…For example, power converter loss can be reduced by lowering the step‐up ratio of the converter in low‐speed regions. On the other hand, the current needed for the flux weakening control of the motor can be reduced and copper loss can be reduced by increasing the step‐up ratio in high‐speed regions …”

Section: State Of the Artmentioning

confidence: 99%

“…On the other hand, the current needed for the flux weakening control of the motor can be reduced and copper loss can be reduced by increasing the step-up ratio in high-speed regions. 5,6 In prior studies, we proposed a minimum DC link voltage driving control system and a design method for the same that suppresses the DC link voltage from the low-speed region to a minimum, and drives in a single pulse mode. 7,8 The objective of these studies was to attain high efficiency in the DC link voltage control system of a variable DC link voltage motor drive system.…”

Section: State Of the Artmentioning

confidence: 99%

Design method considering the frequency band of the disturbance in the DC link voltage control system of hybrid electric vehicle driving systems

Heo

Kondo

2019

Electrical Engineering Japan

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DC link voltage variable systems with DC/DC converter are used in hybrid electric vehicles for improving the power of the system by boosting the DC link voltage. Voltage feedback control using only proportional compensator has been proposed as a control method for the DC/DC converter. The control system can be easily designed, but there is a possibility that a steady‐state error occurs in the DC link voltage. In this paper, a proportional integral compensator is proposed to eliminate the steady‐state error of the DC link voltage in DC link voltage feedback controllers. In addition, when designing the gain of the compensator, the frequency band of the disturbance is considered. The proposed method is verified through experiments on the downsizing model.

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“…Using (24), V dc is calculated as From the above analysis, it is observed that the required V dc can be determined using (25) from the reference values (T e * , λ s * , and ω r * ) and the motor parameters.…”

Section: Selection Of Variable Dc-link Voltage and Impactmentioning

confidence: 99%

Efficiency and performance analysis of DTC‐based IM drivetrain using variable dc‐link voltage for electric vehicle applications

Prabhakar

Chinthakunta

Singh

et al. 2018

IET Electrical Systems in Transportation

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In recent times, there has been a surge in R&D activities in the area of electric vehicles (EVs). This surge is fuelled by various governmental policies that aim at increasing the penetration of EVs on roads. This work aims at developing and analyzing drivetrain configurations for city commute vehicles. Since city commute involves frequent start stops, it is necessary to focus on the dynamic performance as well as the system efficiency. Here two drivetrain configurations are considered. The first has a battery pack, an inverter, and an induction motor while the second configuration has an additional dc-dc converter. A detailed control strategy for each drivetrain is presented. Moreover, an experimental setup is developed that mimics the behavior of a scaled-down vehicle. Both the configurations are subjected to extensive experimentation using the developed setup and it is found that despite the use of an additional dc-dc converter, the second configuration has better overall system efficiency in city driving conditions. To explain the results, detailed efficiency maps of the individual subsystem and the overall system are also presented. Furthermore, the drive cycle response and energy consumption analysis, for both the drivetrains for NYCC and city part-NEDC are presented.

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Energy Efficiency Improvement via Bus Voltage Control of Inverter for Electric Vehicles

Cited by 40 publications

References 30 publications

Efficiency Optimization and Control Strategy of Regenerative Braking System with Dual Motor

Efficiency Optimization and Control Strategy of Regenerative Braking System with Dual Motor

Design method considering the frequency band of the disturbance in the DC link voltage control system of hybrid electric vehicle driving systems

Efficiency and performance analysis of DTC‐based IM drivetrain using variable dc‐link voltage for electric vehicle applications

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