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Stepper Motor Bike Generator

September 8, 2010 Electronics / DIY electronics 226 785 21

A stepper motor is not only a motor that drives all kinds of devices (printer, scanner, etc.), but also a good generator! The main advantage of such a generator is that it does not need high revs. In other words, even at low speeds, the stepper motor generates a lot of energy. That is, an ordinary bicycle generator requires initial revolutions until the lamp starts to shine with bright light. This disadvantage disappears when using a stepper motor.

In turn, the stepper motor has several disadvantages. The main one is a large magnetic sticking.

Anyway. First we need to find a stepper motor. Here the rule works: The larger the engine, the better.

Here I will introduce you to a couple of mounting options and a couple of stepper motor options.

Let's start with the biggest. I tore it out of the plotter for printing, it's such a big printer. In appearance, the engine looks quite large.

Before showing you the stabilization and power scheme, I want to show you the method of attachment to your bike.

As can be seen from the figure, our generator is bolted closer to the axis of the wheel and rotates from an additional circle. Here you need a thought and ingenuity. Each of you needs to come up with a mount and a circle of rotation yourself, since there are a lot of options.

Here is another option with a smaller engine.

Details:

I think each of you during the construction will choose the most suitable option for him.

Well, now it's time to talk about flashlights and power circuits. Naturally, all the lights are LED.

The rectification scheme is usual: a block of rectifying diodes, a pair of large capacitors and a voltage regulator.

Typically, 4 wires corresponding to two coils come out of a stepper motor. Therefore, there are two rectifier blocks in the figure.

Our generator is capable of producing up to 50 volts of voltage at high speeds, so capacitors must be taken at a voltage of at least 50.

A stabilizer for a voltage of 5-6 volts.

What is our homemade good ?! - The fact is that even when starting off, our lamp shines brightly! And in the process of movement does not flicker and does not go out.

That's all !

come back

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Comments (21)

#1 mailz Guests October 6, 2010 12:55
2

Could you indicate which radio components are needed. In electronics, I am not strong ...
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#2 dimansid Guests October 6, 2010 2:37 p.m.
0

If you are not good at electronics, then I advise someone to ask. Well, and if specifically about the details, then: any diodes for a current of 100 mA or more, it is better to use a diode bridge. Capacitors with voltages greater than 50 volts and, accordingly, capacities from 4800 uF. The stabilizer chip for a stabilization current of 5 volts.Lossless parts are replaced with analogues and there are no specific restrictions.
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#3 mailz Guests October 6, 2010 15:11
0

thank.
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#4 [) eNiS Guests October 14, 2010 7:32 p.m.
2

Or you can just put the multiplier instead of the circuit. Let's say ~ 6V goes from the generator to the multiplier and 12V goes out of there. I just don’t know if the current strength changes or not ((.
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#5 TRP Guests October 20, 2011 18:09
0

What nonsense ... what multiplier? ...
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#6 TRP Guests October 20, 2011 18:20
1

The step-by-step option is really good. Checked back in the years that way 90s. It is better to transmit the rotation closer to the axis of the wheel (less engine speed, less noise, less dirt and the eights on the wheel do not affect the rotation of the generator). The first version of the engine as a generator (the first and second photo) is preferable ... less "magnetic sticking", rotates softer.
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#7 Levsha Guests March 10, 2012 20:30
1

yes on a step engine .. convenient. and most importantly, it is durable.
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#8 self-taught Guests June 18, 2012 20:51
1

stepper motors are created on eternal bearings. they are made of obsidan cage for holding balls of brass-plated zinc alloy. Now the winchester bushings are made from obsidana, an eternal wear-resistant metal, but very expensive than gold. By the way, a voltage multiplier exists; from 1.2 volts it makes 15 volts. it is almost impossible to get it, but I know somewhere in the radio magazines I read that it was placed on microcalculators. The electronics of the 7-12 model, it worked even from the power supply network. 15 volt small from a battery 1.5 volts with a voltage multiplier of 15 volts.
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#9 Vitali Guests October 10, 2013 03:22
0

I did it, clear thing
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#10 Yasha Guests November 6, 2013 22:35
0

type in a search engine: the voltage multiplier and it will give you everything there on the conders the whole thing
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#11 yyyy Guests December 7, 2013 13:22
0

This is the wrong step, because sticking is strong. You need to use only bipolar.
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#12 Vlad Guests February 22, 2014 14:20
3

there is an option I did. you need 6 flat round identical magnets with a hole (I had them from the speakers), fasten them to the needles with bolts with large washers through the magnet holes and attach a coil with copper wire to the frame (I made a transformer for a television antenna, sawed off the part where the primary one was wound winding 220 volts) and set the sawn-off part to the magnets at a distance of 1-2 mm, then I installed the stabilizer (the most difficult part I assembled on the principle of Mintsevsky in google) I threw a diode bridge and a 10-volt capacitor 1000mF after the stabilizer (to a hundred I made 5 volts with a stabilized current) from such a generator and the LED light was on and the portable speaker was charging (it just needed 5 volts 350mA) I advise you to try a lot of pluses (the most important thing is there is no friction)
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#13 Lamack Guests March 18, 2014 14:37
2

I took the stepper motor as a basis and made a powerful LED flashlight. Now you can not think about buying batteries. Everything works with a half turn of the handle :) Thanks for the article!
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#14 sisak Guests April 7, 2014 18:04
0

Can I use the engine from a floppy disk reader?
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#15 Lover Guests January 21, 2015 20:56
0

Quote: Sisak
Can I use the engine from a floppy disk reader?

Try it
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#16 Evgeniy Guests February 5, 2015 12:31
1

Please tell me, what should be the parameters of the motor in order to produce a current of at least 10A and a voltage of 48V in the same way?
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#17 Alexander Guests September 27, 2015 12:53
1

[b] Eugene [/ b],
Such parameters should be 48V and 10A.
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#18 Evgeniy Guests December 19, 2015 10:20
6

The generator from the AN-2 aircraft just fits. It is possible with KAMAZ. Also suitable. You can transformer Tesla. Separate block on the back! In general, everything will glow on the road, including the cyclist. Not a single infection will dare to run over.
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#19 Max Guests October 8, 2016 19:40
0

I want to assemble a generator that would charge the battery from a moped ... I will put everything on a bicycle. I think the efficiency of this system is quite high, and will be able to recharge my battery (12v, 5a / h)
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1. #20 Guest Anatoly Guests 29 january 2019 01:10
  0
  
  The average person on a bicycle develops power somewhere around 250 watts (25v 10A) or (48v 5A) but not 500vat
  
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#21 N1tro Guests August 22, 2017 09:27
0

The problem of finding and installing, can it be better and cheaper to buy a ready-made generator?
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