Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Compensation of current measurement errors due to sensor scale error and non-simultaneous sampling error for three-phase inverter applications

  • Kim, Mi-Seong (Department of Electrical Engineering, Chungnam National University) ;
  • Park, Da-Hye (Department of Electrical Engineering, Chungnam National University) ;
  • Lee, Wook-Jin (Department of Electrical Engineering, Chungnam National University)
  • Received : 2021.07.14
  • Accepted : 2021.10.22
  • Published : 2022.01.20
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Abstract

In this paper, simple compensation methods for the current measurement errors due to the scaling gain error of the current sensor and non-simultaneous sampling error are proposed for three-phase inverter applications. The scaling error can be compensated offline simply by turning of one phase of the inverter. The error compensation methods for the non-simultaneous sampling error are proposed according to the number of sample and hold (S/H) circuits in the current sensor and analog-to-digital converters (ADCs). When a low-cost ADC with a few S/H circuits is used, it can be divided into three cases and compensated through a simple calculation formula. The effectiveness of the proposed compensation methods is verified through simulations and experiments.

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References

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