Efficiency Comparison of Electric Wheel Loader Powertrains with Dual Motor Input in Distributed Driving Modes
Round 1
Reviewer 1 Report
What’s the originality of this study? There are several references in literature about this.
The authors must consider several factors in this study: mass, road conditions (on the slope or on the hill) and speed.
The quality of some figures should be improved (example: fig: 13,14,15)
What’s the physical model of this proposal (complete chain: Battery+DC/DC+DC/AC+Electric Motors), there is a lack of information about power converters used in this study.
How the SOC of EV is detected in this research work?
The authors must explain the different modes: acceleration, braking or deceleration.
The authors must further explain the figures 16,17, 18 and Tables 3,4 and 5.
The references are poor, the authors must improve this part.
The authors can use the references below to improve their paper.
- A smart cyber physical multi-source energy system for an electric vehicle prototype, ELSEVIER 2020
- Potential of a Two Motor Concept for Electric Vehicles with Respect to its Interaction with the Air Conditioning Unit, 2019 Electric Vehicles International Conference (EV)
- Important technical considerations in design of battery chargers of electric vehicles, MDPI-Energies 2021
Some modifications and rewording are necessary.
Author Response
Please see the attachment.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
1. Is Eq(1) correct? It seems that the law of conservation of energy is not satisfied.
2. There are many formulas and symbols involved in the paper, but there are some mistakes for the explanation of the relevant conformity, such as 
in Eq(4), m, n in Eq(6).
3. Is “walking conditions” the same as “running conditions”? Why is it not consistent before and after?
4. It is recommended to supplement the efficiency chart of the motor, which can make the experimental results later more convincing.
5. Lack of necessary theoretical analysis. On the one hand, energy saving is that the motor works in the high efficiency range, is it also related to parasitic power?
The manuscript needs careful editing by someone in technical English editing, so that the goals and results of the study are cleat to the readers.
Author Response
Please see the attachment
Author Response File: Author Response.pdf
Reviewer 3 Report
While the paper discusses the findings, it doesn't provide clear implications for practical applications. How can manufacturers or operators use this information to improve the energy efficiency of electric loaders? Practical recommendations are essential for translating research into action.
The paper should be cautious about establishing causality based solely on correlation. The observed relationships between drive modes and energy efficiency might be influenced by confounding factors not accounted for in the study.
While the study suggests certain design considerations for future electric loaders, it could expand on this by proposing specific avenues for further research. This could involve exploring additional factors that influence energy efficiency, like load capacity, terrain characteristics, or operator behavior.
While the paper discusses torque distribution ratios, it would greatly benefit from delving into the overall system dynamics. How does the integration of dual motors impact the vehicle's stability, maneuverability, and overall performance? Exploring these dynamics would add practical insights for engineering and operational considerations.
Introducing a dual motor system presents potential trade-offs, such as increased complexity, weight, and cost. The paper should discuss these trade-offs in detail and provide an analysis of whether the energy efficiency gains justify the added complexities and costs.
It's important to acknowledge that controlled experimental conditions might not fully capture the variability and unpredictability of real-world operating environments. Discussing the potential challenges of translating laboratory findings to actual field performance would provide a more holistic view.
Beyond technical considerations, user experience and operator behavior play a crucial role in real-world efficiency. Addressing how dual motor systems influence operator behavior and the overall user experience would contribute to a more comprehensive analysis.
While the paper focuses on energy efficiency, it's also relevant to discuss the broader environmental impact of dual motor systems. Are there any implications for battery life, maintenance, or recyclability that should be considered?
Author Response
Please see the attachment.
Author Response File: Author Response.pdf
Round 2
Reviewer 1 Report
The authors have answered all of my questions and the paper has been improved.
The article is well written overall.
Reviewer 2 Report
No Comments. I am glad to see that all questions have been answered.
No Comments.
Reviewer 3 Report
The authors have addressed all the quiries raised during the earlier version.
