HighFrequency Square Wave Injection Sensorless Control Method of IPMSM Based on Oversampling Scheme
Abstract
:1. Introduction
2. Traditional Sensorless Control of IPMSM Based on HighFrequency Square Wave Voltage Injection
2.1. HighFrequency Square Wave Signal Injection Principle
2.2. Error Factor Analysis of Traditional High Frequency Square Wave Signal Injection Method
2.2.1. The Ignored Current Sampling Error during the ZeroVector Action Process
2.2.2. The Low Angle Update Frequency and the Long Position Delay
3. A Novel Sensorless Control Method of HighFrequency Square Wave Voltage Injection Based on Oversampling Scheme
3.1. Oversampling and Effect Analysis of HighFrequency Response Current
3.2. The HighFrequency Response Current Demodulation with the Proposed Method
4. Experiment Result and Analysis
4.1. Load Start and Brake Experiment at Low Speed
4.2. Step Load Experiment at Constant Speed
5. Conclusions
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Sample Mode  Weakness and Strength  

The Traditional Method  Sampling three times in three PWM cycles, which is at the start time of the injection cycle, the middle time of the injection cycle, and the end time of the injection cycle 

The Proposed Method  Sampling four times in two PWM cycles, which is at the beginning and end of the zerovector and effective vector, respectively, in one PWM carrier cycle 

Parameter  Value  Parameter  Value 

Rates Power  20 kW  Rated Speed  3000 r/min 
daxis Inductance  0.209 mH  Pole Pairs  4 
qaxis Inductance  0.333 mH  Resistance  10.23 mΩ 
Rated Torque  64 Nm  Flux Linkage  0.071 Wb 
Rated Voltage  300 V  Rated Current  94 A 
Load Start and Brake Experiment at Low Speed  Step Load Experiment at Constant Speed  

Quantitative Analysis: (Angle Error)  Qualitative Analysis  Quantitative Analysis: (Angle Error)  Qualitative Analysis:  
The Traditional Method  Acceleration: 5.70° 400 r/min: 2.85° Deceleration: 5.54°  Estimated position angle error is large.  When the torque is 96 Nm at 400 r/min: 4.80°  Estimated position angle error is large. 
The Proposed Method  Acceleration: 2.65° 400 r/min: 1.20° Deceleration: 2.44°  Estimated position angle error is small.  When the torque is 96 Nm at 400 r/min: 2.22°  Estimated position angle error is small. 
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Wang, Z.; Guo, Q.; Xiao, J.; Liang, T.; Lin, Z.; Chen, W. HighFrequency Square Wave Injection Sensorless Control Method of IPMSM Based on Oversampling Scheme. World Electr. Veh. J. 2022, 13, 217. https://doi.org/10.3390/wevj13110217
Wang Z, Guo Q, Xiao J, Liang T, Lin Z, Chen W. HighFrequency Square Wave Injection Sensorless Control Method of IPMSM Based on Oversampling Scheme. World Electric Vehicle Journal. 2022; 13(11):217. https://doi.org/10.3390/wevj13110217
Chicago/Turabian StyleWang, Zhiqiang, Qi Guo, Jifeng Xiao, Te Liang, Zhichen Lin, and Wei Chen. 2022. "HighFrequency Square Wave Injection Sensorless Control Method of IPMSM Based on Oversampling Scheme" World Electric Vehicle Journal 13, no. 11: 217. https://doi.org/10.3390/wevj13110217