Society of Robots - Robot Forum
Mechanics and Construction => Mechanics and Construction => Topic started by: ballbreaker on March 12, 2011, 10:43:15 AM
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I have searched the internet to find an answer but i didn't find what i was looking.
am trying to charge a battery by spinning motors but the obvious question is when i connect them the battery will give energy to the motors how do i stop the battery from giving power but to take power from the motor and charge?
also what other things i have to be aware of?
thank you
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Simplest is a single diode to allow current to only go from the motor to the battery.
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Hi,
Hand spinning or by a windmill or similar?
If spinned by hand, either use gearing to get it spinning fast or use a stepper motor.
A stepper will take a couple of diodes, as there's 2 or 4 phases (depending on whether the motor is a unipolar or a bipolar type), but small steppers are very efficient with even modest spin rates.
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thank you for your response and am sorry that i didnt reply earlier
its going to be most likely a brushless geared motor (with permanent magnets) i have thought about the diodes but because am using 12V i thing it will quickly overheat wouldn't ? also if the voltage created gets higher than 12V can a 12V voltage regulator keep it down?
btw is the brushless motor better as a generator rather than a normal dc motor?
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Hi,
its going to be most likely a brushless geared motor (with permanent magnets) i have thought about the diodes but because am using 12V i thing it will quickly overheat wouldn't ?
No. You just need to choose diodes that fits the output (V&A).
also if the voltage created gets higher than 12V can a 12V voltage regulator keep it down?
How much higher, at what currents and what specific regulator.
btw is the brushless motor better as a generator rather than a normal dc motor?
Haven't ever tried one that way, but I'd think they were more efficient than a brushed motor - you'll need a rectifier for each phase winding though.