Lebowski
10 MW
Another early drill video (sorry this one is sideways to get the laptop screen in the picture):
[youtube]-bS9-QNsUpE[/youtube]
BLDC drill running at (close to) full torque, sensorless running on saliency... meaning the phase information for the FOC control loop comes from additional code that measures the differences in the motor inductances.
This is an early version, later versions have improved accuracy for the phase detection (and so require a bit less phase current). At this point there was no transition to standard sensorless FOC yet.
Note: the voltage indicated on the laptop is double the actual voltage, a mistake in the LabVIEW program...
[youtube]-bS9-QNsUpE[/youtube]
BLDC drill running at (close to) full torque, sensorless running on saliency... meaning the phase information for the FOC control loop comes from additional code that measures the differences in the motor inductances.
This is an early version, later versions have improved accuracy for the phase detection (and so require a bit less phase current). At this point there was no transition to standard sensorless FOC yet.
Note: the voltage indicated on the laptop is double the actual voltage, a mistake in the LabVIEW program...