Ratcheting Mechanism

[jpearman]

@bogidon

That’s a sick chart. So if I understand this correctly, spinning a motor in reverse might heat the PTC which would cause it to apply increased resistance? That increased resistance would mean less current can go to the motors after they’ve been forcefully spun? Is a 4A PTC hard to overheat?

Spinning the motor will create (in simple terms) voltage, we call this back emf and is why when the motor is running under load and spinning quickly the current is low.

In terms of the 4A PTC performance, there is some information here.

PTC performance measurements