Portable electric cutter

A portable electric cutter having a motor, the portable electric cutter comprising:

• a housing in which the motor is accommodated;
• a saw blade driven to rotate by the motor;
• a base coupled to the housing, having a bottom surface slidable on a material to be cut, and having an opening through which the saw blade can protrude downward from the bottom surface;
• a fan driven to rotate by the motor and cooling the motor by fan air generated by the rotation;
• a driving circuit including switching elements for switching power supplied to the motor;
• a control circuit for controlling the driving circuit;
• and
• a circuit board on which one or both of the driving circuit and the control circuit is mounted, wherein:
• motor cooling air vents and circuit board cooling air vents are provided in the housing on a side opposite to the saw blade,
• at least a part of the circuit board is disposed on a radially outer side of the fan when a direction orthogonal to a rotation axis of the fan is defined as a radial direction,
• at least a part of the circuit board is disposed in a flow path of the fan air,
• the motor is a brushless motor,
• a rotation state detection unit for generating a signal in accordance with a rotation position of the motor is further provided, and
• the control circuit receives the signal of the rotation state detection unit and transmits a signal for controlling the drive of the motor to the driving circuit.