CPC H02H 7/0811 (2013.01) [B64C 39/024 (2013.01); B64D 27/24 (2013.01); B64D 31/00 (2013.01); B64U 50/19 (2023.01)] | 20 Claims |
1. An unmanned aerial vehicle (UAV), comprising:
a plurality of propulsion mechanisms; and
a motor drive and control system associated with and configured to drive a respective one of the plurality of propulsion mechanisms, each motor drive and control system including:
a direct current (DC) portion electrically coupled to an alternating current (AC) portion, wherein the AC portion generates a three-phase signal to drive the respective one of the plurality of propulsion mechanisms;
an AC high-threshold overcurrent protection mechanism configured to monitor currents associated with each phase of the three-phase signal and trigger a high-threshold overcurrent fault condition based at least in part on the monitored currents associated with each phase of the three-phase signal;
an AC low-threshold overcurrent protection mechanism configured to monitor the currents associated with each phase of the three-phase signal and trigger a low-threshold overcurrent fault condition based at least in part on the monitored currents associated with each phase of the three-phase signal;
a first ground fault protection mechanism configured to monitor a DC positive current and a DC negative current and trigger a first ground fault condition based at least in part on the monitored DC positive current and the DC negative current;
a second ground fault protection mechanism configured to monitor the DC positive current and the currents associated with each phase of the three-phase signal and trigger a second ground fault condition based at least in part on the monitored DC positive current and the currents associated with each phase of the three-phase signal;
a current imbalance protection mechanism configured to monitor the currents associated with each phase of the three-phase signal and trigger a current imbalance fault condition based at least in part on the monitored currents associated with each phase of the three-phase signal;
a DC open protection mechanism configured to monitor a DC bus voltage and at least one of the DC positive current or the DC negative current and trigger a DC open fault condition based at least in part on the monitored DC bus voltage and the at least one of the DC positive current or the DC negative current; and
a DC overcurrent protection mechanism configured to monitor the DC positive current and trigger a DC overcurrent fault condition based at least in part on the monitored at least one of the DC positive current.
|
5. A protection mechanism for a motor drive and control system, comprising:
an alternating current (AC) high-threshold overcurrent protection mechanism configured to trigger a high-threshold overcurrent fault condition based at least in part on currents associated with each phase of a three-phase signal;
an AC low-threshold overcurrent protection mechanism configured to trigger a low-threshold overcurrent fault condition based at least in part on the currents associated with each phase of the three-phase signal; and
a current imbalance protection mechanism configured to trigger a current imbalance fault condition based at least in part on the currents associated with each phase of the three-phase signal.
|
13. A protection mechanism for a motor drive and control system, comprising:
a first ground fault protection mechanism configured to trigger a first ground fault condition based at least in part on a direct current (DC) positive current and a DC negative current;
a second ground fault protection mechanism configured to trigger a second ground fault condition based at least in part on the DC positive current and currents associated with each phase of a three-phase signal;
a DC open protection mechanism configured to trigger a DC open fault condition based at least in part on a DC bus voltage and at least one of the DC positive current or the DC negative current; and
a DC overcurrent protection mechanism configured to trigger a DC overcurrent fault condition based at least in part on the DC positive current.
|