Brushless CD-ROM motor operated from MATLAB -- II

Another video featuring a brushless motor salvaged from a CD drive. The motor is driven using MATLAB to send signals through a custom, three-phase inverter.

read about it under the research section on: http://christopherphaneuf.com

Category:

Science & Technology

Tags:

• brushless
• motor
• CD-ROM
• reu
• research
• three
• phase

[XGCKrazyK]

this is the stupidest video on youtube

[christopherphaneuf]

@XGCKrazyK agreed.

[christopherphaneuf]

this is essentially the same as stepper motor operation, since it was running open loop, without the feedback of the hall effect sensors. the speed was determined by the frequency of the pulses. i wasn't trying to simulate its operation as a CD drive nor was i reinventing the brushless motor -- it was simply to demonstrate the fundamentals of the motor and to back up an idea i had regarding the motor's potential integration with a rotary valve.

[chamath1985]

Um it was rotating slow. How did you power it? How much voltage vs amperes? Plz reply.

[christopherphaneuf]

i don't recall the details of that setup since it was a one-day experiment as part of a 10 week internship in 2007. i used a PCI data acquisition device to send low-level digital signals (controlled by signal generators in MATLAB), with the proper relative phase alignment, to six transistors (for 3-phase inversion), providing the electrical commutation needed to operate a synchronous motor. the power supply connected to the inverter was likely at 9 or 12 volts.

[VorVZakonie]

holly shit! i love this video !! it changed my life !!!

[yonathan90]

one + , one - , and one what?

[RamiroR]

I remember having one of these and finding it so frustrating the fact that I couldn't make it spin without equipment

[Haunted360]

Pretty good. Though, it would be better if you made MATLAB have a speed control. So you could run it at 24x, 16x etc...

[XGCKrazyK]

@LBCFCSS Their gonna use CD ROM drive motors for their roller blades? i think not. you would need something like a wheel chair motor that has a gearbox on it for the required torque to move someone on roller blades. All this video is, is a brush-less 3 phase dc motor spinning... big deal.. id rather watch paint dry, he doesn't explain how he used a three-phase inverter or anything. And as for the thing u lean forward an go forward its been made, its called a SEGWAY.

[LBCFCSS]

@XGCKrazyK This video is not that stupid. Think of this. This video could give someone the idea to attach it onto a pair of roller blades inserting pressure detectors so if you lean forwards the motor spins and vice versa. This could lead onto new motor powered blades with increased speed. With developers seeing this done they might create more powerful motors making the go even faster. So now your at a running speed without doing anything but leaning forwards slightly.

[frogvillage]

try maple 7.0..it would run much faster....

[valiza123]

I tried this experiment. At this speed it takes 1.5 amps. As it reaches maximum speed (at that voltage) the current draw falls to 0.5 amps.