Accuracy Enhancement of Parameter Estimation and Sensorless Algorithms Based on Current Shaping


Vol. 16, No. 1, pp. 1-8, Jan. 2016
10.6113/JPE.2016.16.1.1


PDF    

 Abstract

Dead time is typically incorporated in voltage source inverter systems to prevent short circuit cases. However, dead time causes an error between the output voltage and reference voltage. Hence, voltage equation-based algorithms, such as motor parameter estimation and back electromotive force (EMF)-based sensorless algorithms, are prone to estimation errors. Several dead-time compensation methods have been developed to reduce output voltage errors. However, voltage errors are still common in zero current crossing areas, and an effect of the error is much worse in a low speed region. Therefore, employing voltage equation-based algorithms in low speed regions is difficult. This study analyzes the conventional dead-time compensation method and output voltage errors in low speed operation areas. A current shaping method that can reduce output voltage errors is also proposed. Experimental results prove that the proposed method reduces voltage errors and improves the accuracy of the parameter estimation method and the performance of the back EMF-based sensorless algorithm.


 Statistics
Show / Hide Statistics

Cumulative Counts from September 30th, 2019
Multiple requests among the same browser session are counted as one view. If you mouse over a chart, the values of data points will be shown.



Cite this article

[IEEE Style]

J. Kim and J. Ha, "Accuracy Enhancement of Parameter Estimation and Sensorless Algorithms Based on Current Shaping," Journal of Power Electronics, vol. 16, no. 1, pp. 1-8, 2016. DOI: 10.6113/JPE.2016.16.1.1.

[ACM Style]

Jin-Woong Kim and Jung-Ik Ha. 2016. Accuracy Enhancement of Parameter Estimation and Sensorless Algorithms Based on Current Shaping. Journal of Power Electronics, 16, 1, (2016), 1-8. DOI: 10.6113/JPE.2016.16.1.1.