Article 430.6(B)references torque motors. What is a torque motor, is it a traction motor? 430.6(C) refers to an Alternating-Current Adjustable Voltage motor. What is this?
"Torque motors are designed to provide high starting torque and sloping characteristics (torque is highest at zero speed and decreases steadily with increasing speed), and operate over a wide speed range. They also provide stable operation, especially in the low speed range or under a locked rotor condition."