What does 'Wan La San' mean?

[DeLondon]

Wan La San means using a controller with a power of over 10,000 watts to drive a 3,000-watt motor. The following is a related introduction about motors: 1. Working principle: The direction of the force on the conductor is determined by the left-hand rule. This pair of electromagnetic forces forms a torque acting on the armature, which is called electromagnetic torque in rotating motors. The direction of the torque is counterclockwise, attempting to make the armature rotate counterclockwise. If this electromagnetic torque can overcome the resistance torque on the armature (such as the resistance torque caused by friction and other load torques), the armature can rotate counterclockwise. 2. DC motor: The excitation method of a DC motor refers to how to supply power to the excitation winding, generate excitation magnetomotive force, and establish the main magnetic field.