Speed Sensorless Control Based on Initial Rotor Position Detection for EESM

<div>Speed estimation waveform of EESM by high-frequency signal injection method. (a) Comparison between speed estimation waveform and actual waveform and (b) enlarged drawing of comparison between speed estimation waveform and actual waveform.</div>

Mathematical Problems in Engineering

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Figure 15

Figure 15: Speed Sensorless Control Based on Initial Rotor Position Detection for EESM 