Journal
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
Volume 7, Issue 2, Pages 815-824Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TTE.2020.3029046
Keywords
Current measurement; Space vector pulse width modulation; Switches; Phase measurement; Voltage measurement; Transportation; DC bus current sampling; minimum sampling time; permanent magnet synchronous motor (PMSM); phase current reconstruction; sensed space vector pulsewidth modulation (SSVPWM)
Funding
- National Natural Science Foundation of China [61803345]
- Science and Technology Development Project of Henan Province [202102210303]
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A new dc bus current sensed SVPWM (SSVPWM) method is proposed in this article to overcome challenges of the traditional algorithm. By introducing the concept of minimum sampling time and accurately dividing the unobservable area of the dc bus sampling system, the SSVPWM and associated current reconstruction strategy provide accurate current feedback for high-performance vector control, as demonstrated in experiments.
The dc bus current sampling technology with the traditional space vector pulsewidth modulation (SVPWM) scheme imposes several challenges, particularly at the low-modulation region and sector boundaries, where the duration of a nonzero vector may be so short that the phase current cannot be measured reliably. A new dc bus current sensed SVPWM (SSVPWM) method is proposed, in this article, to overcome shortcomings of the traditional algorithm. By introducing the concept of minimum sampling time, the unobservable area of the dc bus sampling system is divided accurately. Then, the SSVPWM and associated current reconstruction strategy are proposed by inserting the measurement vector and the compensation vector. Finally, experiments were performed on a 2.7-kW permanent magnet synchronous motor (PMSM), and the experimental results showed that the current sampling error of the proposed SSVPWM is less than 2% and the THD of three-phase current is less than 4.9%, which provides accurate current feedback for high-performance vector control.
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