Interpolation Error Compensation for Look-up Table Based PMSM Control for Electric Vehicle

2018 ◽  
Author(s):  
Jung-Hyo Lee
Keyword(s):  
Electric Vehicle ◽  
Error Compensation ◽  
Interpolation Error ◽  
Look Up Table

scholarly journals Feedforward Interpolation Error Compensation Method for Field Weakening Operation Region of PMSM Drive

Electronics ◽  
2019 ◽  
Vol 8 (9) ◽  
pp. 1052 ◽  
Author(s):  
Ji ◽  
Lee
Keyword(s):  
Error Compensation ◽  
Control Method ◽  
Interpolation Error ◽  
Control Methods ◽  
Field Weakening ◽  
Look Up Table ◽  
Feedforward Controller ◽  
The Look ◽  
Discontinuous Data ◽  
Linear Controllers

This study proposes a field weakening control method with interpolation error compensation of the look-up table based permanent-magnet synchronous machine (PMSM) method. The look-up table (LUT) based control method has robust control characteristics compared to other control methods that use linear controllers for current reference generation. However, it is impossible to store all current references under all circumstances for torque commands. General LUT based control methods use two input parameters. In order to mitigate the effect of discretely stored data, two-dimensional interpolation is used to linearly interpolate values between discontinuous data. However, because the current trajectories of PMSMs are generally ellipsoidal, an error occurs between the linearly interpolated and controllable current references. This study proposes a method to compensate for this interpolation error using a feedforward controller for rapid compensation. The improvement using the proposed method is verified by experiment and simulation.

A new brushless synchro with look-up table error compensation

2015 ◽  
Vol 29 (4) ◽  
pp. 577-591
Author(s):  
Mahdi Ghafarzadeh ◽  
Ali Kamali E. ◽  
Aliakbar Damaki Aliabad ◽  
Rezvan Abedini ◽  
Mohammad Amin Tajeddini
Keyword(s):  
Error Compensation ◽  
Look Up Table

scholarly journals Compensation of Interpolation Error for Look-Up Table-Based PMSM Control Method in Maximum Power Control

Energies ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5526
Author(s):  
Do-Yun Kim ◽  
Jung-Hyo Lee
Keyword(s):  
Control System ◽  
Power Control ◽  
High Speed ◽  
Maximum Output Power ◽  
Compensation Method ◽  
Maximum Power ◽  
Torque Control ◽  
Interpolation Error ◽  
Maximum Output ◽  
Look Up Table

This paper proposes a compensation method for interpolation error of the maximum power control of a PMSM control system that generates current commands through a look-up table. A torque control system using a look-up table created through experiments has superior characteristics, such as control stability and torque accuracy, compared to a system that executes torque control via a linear controller based on modeling. However, it is impossible to generate information on all the currents for the output torque in the table. Therefore, because the data stored in the look-up table have a discrete characteristic, they are linearly interpolated to generate a current command for the torque command. However, the PMSM current trajectory is generally elliptical, which causes an error owing to linear interpolation, reducing the maximum output power. In particular, when the table data are insufficient, such as in the high-speed operation range, the reduced maximum output cannot be ignored. This paper proposes a compensation method for the interpolation error using two feedforward compensators and a PI controller, which was verified through experiments.

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