Journal
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
Volume 10, Issue 2, Pages 1935-1945Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JESTPE.2021.3051942
Keywords
Current sensor; Dq-transform; gain; offset; quantization error; self-sensing
Categories
Ask authors/readers for more resources
This article explores the propagation of current sensor error through the dq-transform and its impact on high-frequency injection (HFI)-based self-sensing control. Statistical models based on variance are developed for 2- and 3-channel-based dq-transform, and their accuracy is verified using error probability density function (PDF) with uniformly distributed random inputs. The results show that the propagated error in the dq-axes is dependent on the rotor position and follows the error variance model. Additionally, the 3-channel based self-sensing control yields lower position estimation error compared to the 2-channel based self-sensing, albeit with the addition of an extra sensor in the machine drive system.
This article presents propagation of current sensor error through dq-transform and the propagated error effect on high-frequency injection (HFI)-based self-sensing control. Three-phase ac systems use Clark and Park transform with a, b, c phase inputs for control purpose, i.e., dq-transform. When error exists in a, b, c inputs, e.g., due to quantization, gain, offset, noise, and others, the error propagates to d- and q-axes and dq-transform becomes inaccurate; therefore, the control performance degrades. Statistical models based on variance are developed for 2- and 3-channel based dq-transform. The error variance models are verified using the error probability density function (PDF) with uniformly distributed random inputs. It is shown that the error propagated in dq-axes and self-sensing control performance become rotor position-dependent, following the error variance model with error that exists in current inputs. It is shown that the error variance of 2-channel based dq-transform becomes three times higher on average compared to 3-channel based dq-transform. It is demonstrated that 3-channel based self-sensing control results in lesser position estimation error compared to 2-channel based self-sensing with a tradeoff in an additional sensor in the machine drive system.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available