AC Commutatorliess and Brushless Motor

We have developed a type of ac commutatorless motor which is a combination of a motor and thyristor controller. The rotor of the motor has neither a commutator, slip rings nor brushes. The motor can therefore be designed rugged for a high speed control. The motor may be most suitable for use in such an environment as with acid or alkaline gas and at locations where maintenance-free motors are most urgently required.