Fisher Price Overheating Troubles

[Ether]

Originally Posted by DampRobot

What do you mean by running them at a different voltage?

The command that you send to the Jaguar (or Victor) changes the duty cycle of the Jag's (or Vic's) PWM output, and thus changes the voltage being applied to the motor.

IF the data you posted is correct (4800rpm wheel speed, 1.8:1 gear ratio, 0673 motor drawing 27 amps), then you can use the motor curves to calculate the voltage the motor is getting. I explained this in post#2 in this thread. The answer was about 8 volts for the data you gave.

If you increase your gear-down ratio from 1.8:1 to 4:1 as I suggested, your motor will spin faster and your wheel will spin slower. You can then increase the voltage up from 8 volts to bring the wheel speed back up to where you want it. Your motor will now be spinning much faster than it was before, and with less torque load, and it will be much happier.