What happens to a pistol drill with a spark?
Because the rotor is fast rotating, the current can only be transferred to the rotor by carbon brush (conductive and wearable), and when the rotor turns, the carbon brush emits sparks. Each turn of the three-phase motor will be divided into three times, a few hundred revolutions per minute, looks like a spark.The spark becomes bigger, the sound unusual sound, explained that the carbon brush has the question, needs to adjust or to change.
The brush motor adopts a strong magnetic steel as the stator, the conducting coil is a rotor, and the magnetic field line is driven by the coil to generate power
The spark is caused by the repeated contact of the carbon brush on the rotor of the motor in the electric drill.
