What's the function of the capacitor in the power tools?
Steady current, for example, when you watch TV, you don't get radio interference when you turn on the TV
You don't ask very clearly, I think you ask the capacitor is the starting capacitorAC electric tools to turn up, you need a rotating magnetic field, while the individual current single-phase motor can not form the rotating magnetic field, so the need for a starting capacitor to phase to phase current, the two winding of the generated nearly 90 Eve joy difference, to produce a rotating magnetic field. Household fans, for example
It acts as a phase shifter, because power tools are generally single-phase alternating current. Motor single-phase can not start operation, if you add a capacitor, you can play the role of starting and running. The capacitor turns a single-phase alternating current into a two phase alternating current
