Electronics > Projects, Designs, and Technical Stuff
1000000 RPM magnet video - would like the schematic!
iMo:
Does it turn 1mil rpm? I doubt so..
applicanon:
Why doubt? If the transistor can switch at 1 megahertz or greater, and the magnet can keep up with it, then thats your 1 mil rpm... guy shows the hall effect sensor on the scope pulsing at 1 mhz in the video doesnt he? that represents the magnet rpm right?
RoGeorge:
RPM stands for Rotation Per Minute, not per second. 1 MHz at sensor switch means 60 million RPM.
Also, 1 mhz means nothing, 1 mHz = 0.001 Hz, while 1 MHz = 1 000 000 Hz.
iMo:
The hall sensor could show 1MHz, sure, it does not necessarily mean a) the sensors senses the magnet, b) the magnet rotates 1mil times per second, however..
Yansi:
The hall senzor will certainly not work @1Mhz, neither will the rest of the stupid driver circuitry.
As was already kindly pointed out, 1M RPM = 16.67 RPs (16.67 kHz). Which is well within the capability of a generic hall sensor and the driver circuit.
Also note, that there may be multiple flux changes per physical revolution of the magnet, as the circuit may feedback on itself or any kind of harmonics.
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