48 volt Brushless DC motor Brushless DC motors meet variable speed requirements (adjusted and capped via controller), are easy to change direction and have a higher starting torque than AC motors. EMP's range of DC motors are highly efficient, generally operating at above 90% efficiency. They are also smaller than their AC equivalents and can operate at very low speeds if required. IMPORTANT: All BLDC motors require a suitable controller to perform the electronic commutation function in order to operate. These controllers also provide the capability to: -Control and cap the speed -Reverse direction of the motor -Set acceleration and deceleration requirements -Assign specific control parameters via custom set-up of your controller