On a bench drill and drill power question
The hand electric drill motor commutator motor is electrified, brush, commutator and armature winding, DC voltage can also run when appropriate, excitation circuit and its circuit armature series, there is no fixed speed, high speed no-load speed is reduced when the load torque increases, small power is one of its characteristics.
Different types of motor structure vary greatly, the drill is ordinary mussaurus AC asynchronous motor, it has very few, have a fixed speed;
