A New Rotor Position Measurement Method for Permanent Magnet Spherical Motors
and Chengquan Zhou 1Round 1
Reviewer 1 Report
1. From the experimental results, improvement by using the proposed method is not clearly presented. In the conclusion, it is stated that high detection precision is verified. However, it is hard to determine that precision is improved based on the experimental results in the manuscript. Results using other methods should be compared.
2. It is recommended to add an entire system block diagram showing signal flow, controller and etc.
3. More information about experimental system should be provided such as specification for motor drive (inverter), controller and etc.
Author Response
Responses to Reviewer 1 :
Comment 1: From the experimental results, improvement by using the proposed method is not clearly presented. In the conclusion, it is stated that high detection precision is verified. However, it is hard to determine that precision is improved based on the experimental results in the manuscript. Results using other methods should be compared.
R 1: Thank you for your suggestion. In our research group, we also have used the photoelectric sensor and Hall-effect sensor to measuring the rotor position of a PMSM, which are shown in Figure 1-1 and Figure 1-2. The authors added the comparison of different rotor position measurement methods, and have added the following section on page 18 and page 19 in the revised manuscript.
”4.4. Comparison of different rotor position measurement methods
So far, four types of sensors have been widely used for the RPM including MEMS, photoelectric sensor, Hall-effect sensor and high-speed camera, and the experimental results obtained by the MEMS are set as the reference values because the MEMS has the highest accuracy among four of them. The experimental results obtained by the other three methods are compared with those by the MEMS, Table 4 shows their differences. It can be seen that the high-speed camera based RPM has shown higher accuracy than the other two methods.
Table 4. Comparison of different rotor position measurement methods
Measurement method | Photoelectric sensor | Hall-effect sensor | High-speed camera | |
Tilting motion | (°) | 0.65 | 1.55 | 0.32 |
(°) | 0.58 | 1.62 | 0.3 | |
(°) | 0.49 | 1.47 | 0.31 | |
Spinning motion at Center point | (°) | 0.59 | 1.29 | 0.25 |
(°) | 0.51 | 1.36 | 0.3 | |
(°) | 0.47 | 1.28 | 0.3 | |
Edge spinning motion | (°) | 0.69 | 1.87 | 0.22 |
(°) | 0.62 | 1.83 | 0.3 | |
(°) | 0.51 | 1.31 | 0.45 |
* is the error of tilting angle_.
is the error of yaw angle_.
is the error of spinning angle_. ”
Figure 1-1. Measuring the rotor position by photoelectric sensor
Figure 1-2. Measuring the rotor position by Hall-effect sensor
Comment 2: It is recommended to add an entire system block diagram showing signal flow, controller and etc.
R 2: Thank you for your suggestion. We have added an entire system block diagram on Page 11 in the revised manuscript, and added the following sentence “Figure 13 (b) shows the block diagram of the control system. ” on Page 11.
(b)
Figure 13. Experimental platform for measuring the position of the PMSM rotor: (a) Experimental prototype; (b) Block diagram of the control system;
Comment 3: More information about experimental system should be provided such as specification for motor drive(inverter), controller and etc.
R 3: We have added a table in “Experimental results” highlighted in red on Page 12 in the revised manuscript, which shows the parameters of the spherical motor driver circuit. and added the following sentence“Table 2 shows the parameters of the spherical motor driver circuit.” on Page 12.
Table2.Parameters of the spherical motor driver circuit
Working voltage | 24V |
Maximum input voltage | 55V |
Total driver unit number | 24 |
Maximum output current (per every driver unit) | 5A |
Constant-current precision | 20mA |
Maximum output frequency | 200Hz |
Thank you for all the constructive comments and useful recommendations that significantly improve the paper quality.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
The authors should add block diagram of proposed analysis (good quality).
The authors should add photos of applications - fault diagnosis?? The paper is boring now.
Why the topic is essential.
Figures should have better quality.
Please add labels, SI units to axes OX and OY.
In Conclusion section the authors should put 1-3 sentences about future research.
The authors should cite new references (2016-2019 Web of Science).
Please show that you have new knowledge about motors.
for example about fault diagnosis based on acoustic signals;/image processing/ Magnet Spherical Motor
Glowacz A., Fault diagnosis of single-phase induction motor based on acoustic signals,
Mechanical Systems and Signal Processing, Volume 117, 2019, Pages 65-80.
DOI: 10.1016/j.ymssp.2018.07.044
Infrared thermography based diagnosis of inter-turn fault and cooling system failure in three phase induction motor
By:Singh, G (Singh, Gurmeet)[ 1 ] ; Naikan, VNA (Naikan, V. N. A.)[ 1 ]
INFRARED PHYSICS & TECHNOLOGY
Volume: 87 Pages: 134-138
DOI: 10.1016/j.infrared.2017.10.007
Published:DEC 2017
A Sensing System of the Halbach Array Permanent Magnet Spherical Motor Based on 3-D Hall Sensor
By:Li, HF (Li, Hongfeng)[ 2 ] ; Liu, WJ (Liu, Wenjun)[ 1,3 ] ; Li, B (Li, Bin)[ 2 ]
JOURNAL OF ELECTRICAL ENGINEERING & TECHNOLOGY
Volume: 13 Issue: 1 Pages: 352-361
DOI: 10.5370/JEET.2018.13.1.352
Published:JAN 2018
Time-Optimal Trajectory Planning of Permanent Magnet Spherical Motor Based on Genetic Algorithm
By:Zhao, LJ (Zhao, Lijuan)[ 1,2,4 ] ; Li, GL (Li, Guoli)[ 1,2,3,4 ] ; Guo, XW (Guo, Xiwen)[ 1,2,3,4 ] ; Li, S (Li, Shen)[ 1,2,4 ] ; Wen, Y (Wen,
Yan)[ 1,2,4 ] ; Ye, QB (Ye, Qiubo)[ 4 ]
PROCEEDINGS OF THE 2017 12TH IEEE CONFERENCE ON INDUSTRIAL ELECTRONICS AND APPLICATIONS (ICIEA)
Book Group Author(s):IEEE
Book Series: IEEE Conference on Industrial Electronics and Applications
Pages: 828-833
Published:2017
Synthesis Strategy for Stator Magnetic Field of Permanent Magnet Spherical Motor
By:Li, B (Li, Bin)[ 1 ] ; Zhang, S (Zhang, Shuo)[ 1 ] ; Li, GD (Li, Guidan)[ 1 ] ; Li, HF (Li, Hongfeng)[ 1 ]
IEEE TRANSACTIONS ON MAGNETICS
Volume: 54 Issue: 10
Article Number: 8203105
DOI: 10.1109/TMAG.2018.2862864
Published:OCT 2018
Author Response
Responses to Reviewer 2 :
Thank you for all the constructive comments and useful recommendations that significantly improve the paper quality.
Author Response File: Author Response.pdf
Reviewer 3 Report
Good clear work and presentation.
The Lee reference given [13-15] should have included [12]
Define MEMS at the first mention.
Author Response
Responses to Reviewer 3 :
Thank you for all the constructive comments and useful recommendations that significantly improve the paper quality.
Author Response File: Author Response.pdf
Round 2
Reviewer 1 Report
Comments are reflected in the revised paper.
Author Response
Thank you for your affirmation of my revision work.
Reviewer 2 Report
-Please check English
-figures, charts it is good idea to add OY label. for example Fig. 16, 19
Author Response
Comment 1: Please check English
R 1 : Thank you for your suggestion, we have checked the revised manuscript many times, some spell errors were found and corrected, which were highlighted in red in the revised manuscript.
Comment 2: Figures, charts it is good idea to add OY label, for example Fig. 16, 19
R 2 : Thanks for your kind comments, we have added OY labels on Figure 16, Figure 19 and Figure 22 in the revised manuscript.
