How would I limit speed of a DC motor being used as a generator? For a project where I have to make a wind turbine that will automatically limit speed of rotation once past a certain value. Thanks :)
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\$\begingroup\$ (1) By feathering the blades. (2) By turning it out of the wind. (3) By increasing the electrical load. What have you condsidered? \$\endgroup\$– TransistorCommented Nov 18, 2018 at 14:14
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1 Answer
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A few ideas:
- Rotate the motor so the blades are out of the wind
- Change the pitch of the blades by rotating them at the base, so they are no longer effective, if they can have that capability. Also called 'feathering'.
- Use a mechanical brake (you could use a mechanical clutch but that would allow the blades to turn faster, which could cause problems).
- Apply additional load to the motor, dumping heat into a dummy load if necessary
answered Nov 18, 2018 at 14:18
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\$\begingroup\$ Your 2 is pitch control... \$\endgroup\$ Commented Nov 18, 2018 at 14:27