Abstract
A second-harmonic direct current (DC) ripple compensation technique is presented for a multi-phase, fault-tolerant, permanent magnet machine. The analysis has been undertaken in a general manner for any pair of phases in operation with the remaining phases inactive. The compensation technique determines the required alternating currents in the machine to eliminate the second-harmonic DC-link current, while at the same time minimising the total rms current in the windings. An additional benefit of the compensation technique is a reduction in the magnitude of the electromagnetic torque ripple. Practical results are included from a 70 kW, five-phase generator system to validate the analysis and illustrate the performance of the compensation technique. © 2011 © The Institution of Engineering and Technology.
| Original language | English |
|---|---|
| Pages (from-to) | 28-36 |
| Journal | IET Electric Power Applications |
| Volume | 5 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Jan 2011 |
Keywords
- DC machines
- electric current control
- machine control
- permanent magnet machines
- torque
- direct current ripple compensation
- electromagnetic torque ripple
- multiphase fault tolerant machines
- permanent magnet machine
- power 70 kW
- second-harmonic DC-link current