Electric operating machine

An electric operating machine comprising:na motor; anda power circuit configured to drive said motor by an electric power supplied from a power source, wherein:said power circuit comprises:a voltage conversion part configured to convert an input voltage supplied from said power source to an output voltage and output said generated output voltage to said motor;a current detection part configured to detect a motor current flowing through said motor and monitor whether said motor current satisfies a first criterion, the current detection part being configured to output a first signal when said motor current satisfies said predetermined criterion, andsaid voltage conversion part is configured to lower the output voltage by changing a degree of change of the output voltage relative to the input voltage when said current detection part outputs said first signal.

An electric operating machine comprising a motor, a power source to which a battery is attached, and a power circuit configured to drive said motor by electric power supplied from said power source, wherein:nsaid motor comprises a rotor, a stator, and an output shaft fixed to the rotor;a working tool is attached to said output shaft; andsaid power circuit comprises a regulation part configured to inhibit an excessively large current from flowing through the power circuit and increase a rotation speed of said motor upon start-up of said motor, wherein:either one of said rotor and stator comprises a disc-shaped coil substrate having multiple coil segments arranged in the circumferential direction about said output shaft when seen in the axial direction of said output shaft; andthe other of said rotor and stator comprises a magnet generating a magnetic flux passing through said coil substrate in the axial direction of said output shaft.