Sunday, April 12, 2015

Drive Motor Trouble

We're going to be up late tonight working on a lot of different things for the ProtoDrive 3.0. As of now, we are making sure that we can properly run motors using PWM signals from the mBed at our desired duty cycle. Initially, we were having trouble getting our desired duty cycle to match up to the speed of the motor, so we decided to tweak the PWM period to find a sweet spot. We eventually settled on a 10 ms period (100 Hz) and are varying our duty cycles from there. Using test duty cycles of anywhere from 1 to 99%, we determined that the motor is now behaving exactly as expected from direct control. Now it's time to test our DC to DC converter circuit by applying PWMs to our Buck and Boost transistors to see if the circuit is working as expected.

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