Mechanical“Brushes” Commutation With nmutation Commutation switches the direction of current every half revolution to prevent 'detention'and maintain Without commutatio net positive torque ·Commutation is implemented via a split o幼 slip-ring and graphite brushes Torque ripple magnitude and frequency are a function of the number of Hob commutation segments. 12a 19 What are the directions of the force in the left and right loop? variable power supply 0 0 2019 Mechanical “Brushes” 20 • What are the directions of the force in the left and right loop?