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Energy generator

royston02

This idea was in me for a long time. I know that when stepper motors are rotated, they generate electricity. However they are big and bulky. Which is the smallest thing that generates electricity in oscillatory motion(like stepper motors)?

Minimum amperage - 100-125ma.  Minimum voltage - 5V or high(AC/DC).

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  • DC motors are most often used for this application, but they need to be geared up so they rotate many times per step. As mentioned, the power they generate is mostly not free despite many attempts to capture just the wasted part of walking energy. The power they generate makes it more work to walk - the more power they generate, the harder it is to walk.

    Another popular method uses Piezo-electric generators. These can be simpler to design and pretty efficient, but it is tough to get much power at the frequency of stepping - they work much better at high vibration frequencies. They pretty much need a method of mechanically translating a stepping frequency to a high frequency vibration. They generate the same amount of charge every time they are flexed, so to generate more charge (current) they need to flex more often.

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  • DC motors are most often used for this application, but they need to be geared up so they rotate many times per step. As mentioned, the power they generate is mostly not free despite many attempts to capture just the wasted part of walking energy. The power they generate makes it more work to walk - the more power they generate, the harder it is to walk.

    Another popular method uses Piezo-electric generators. These can be simpler to design and pretty efficient, but it is tough to get much power at the frequency of stepping - they work much better at high vibration frequencies. They pretty much need a method of mechanically translating a stepping frequency to a high frequency vibration. They generate the same amount of charge every time they are flexed, so to generate more charge (current) they need to flex more often.

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