Cooling arrangements for battery-powered stand-alone motor unit

Abstract

A stand-alone motor unit for use with a piece of power equipment includes a housing, an electric motor, a first fan driven by the electric motor and configured to induce an airflow through the electric motor, a power take-off shaft receiving torque from the motor, and control electronics positioned within the housing and electrically connected to the electric motor. The motor unit also includes a battery pack, and a battery receptacle coupled to the housing and engageable with the battery pack to transfer current between the battery pack and the electric motor. The motor unit further includes an auxiliary cooling system located within the housing. The auxiliary cooling system includes a heat sink coupled to the control electronics, and a second fan configured to direct an airflow across the heat sink separate from the airflow induced through the electric motor by the first fan.

CPC Classifications