Abstract
As the dc-link capacitance decreases obviously, the dc-link voltage fluctuates severely in the electrolytic capacitorless permanent magnet synchronous motor (PMSM) drives for compressor applications. The control performance of the compressor deteriorates, and the dc-link may suffer from the fault of overvoltage. In this article, an acceleration extraction-based torque ripple compensation method considering safe operation with dc-link anti-overvoltage is proposed for electrolytic capacitorless PMSM compressor drives. The fluctuation characteristics of the compressor torque and the speed caused by the interaction of the dc-link voltage and the load are analyzed. The load torque is estimated online using the orthogonality theory to suppress the torque ripple. Based on the hybrid proportional-integral-resonant regulator, an anti-overvoltage control strategy is proposed for the safe operation of the regenerating state. Experimental results are performed in the air-conditioner compressor drive system to verify the effectiveness of the proposed method.
| Original language | English |
|---|---|
| Pages (from-to) | 6148-6159 |
| Number of pages | 12 |
| Journal | IEEE Journal of Emerging and Selected Topics in Power Electronics |
| Volume | 10 |
| Issue number | 5 |
| DOIs | |
| State | Published - 1 Oct 2022 |
| Externally published | Yes |
Keywords
- Compressor
- dc-link voltage
- electrolytic capacitorless motor drive
- speed fluctuation
- torque ripple compensation
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