PWM motor control

178

02:23:32

Not sure why, but frequency goes up as i slow the simulation. Get up to about 2.5kHz then simulation crashes. Any ideas? 

published 11 years ago

UncleRick

11 years ago

That simulation speed adjustment function has always confused me. At times it appears to work exactly as expected. At other times it seems totally backwards to expectations. I just don't seem to be able to get a handle on its operation. I would love to hear how it is supposed to work versus how it seems to work. #blownmind

CEMI

11 years ago

1. Change pot to 10k 2. Cap on crtl pin 100nF 3. Light bulb cone

CEMI

11 years ago

Conect light bulb to colector of transistor

fd15

11 years ago

Thank you CEMI, how would you recommend increasing frequency, i am planning on using this to control a 12v dc blower motor on a maple evaporator.

faceblast

11 years ago

change the timing cap to 10nF

fd15

11 years ago

Awesome, simulation lags from real time to about 600ms/s, this will (should) be perfect for the blower.

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