1
Muller Rolf: Direct-current motor. Papst Motoren KG, Craig & Antonelli, October 14, 1975: US3912956 (16 worldwide citation)

In a collectorless d-c motor with a firm stable stator plate arranged between two rotor disks of a permanent-magnet rotor, this stator plate is clamped between two housing shells. The housing shells rigidify the stator plate. An electronic commutator circuit is provided for the motor which is option ...


2
Schaub Gerhard: Collectorless d. c. motor. Gebr Buhler Nachfolger, Striker Michael S, March 5, 1974: US3795848 (5 worldwide citation)

A collectorless D.C. motor includes a rotor, a stator, and a plurality of stator windings arranged on the stator in angularly spaced relationship. Each winding when energized produces a stationary magnetic field having a respective orientation. A control circuit including an oscillator energizes suc ...


3
Feigel Josef Dr, Pfendler Klaus: Electronically commutated collectorless d,c, motor.. Sel Alcatel, October 5, 1988: EP0285048-A2 (1 worldwide citation)

An electronically commutated D.C. motor without a commutator is specified, whose stator (1) has a self-supporting drum winding as the stator winding (14) and a cylindrical plastic body (15), arranged in a winding head (30) centrally with the drum winding (14). The cylindrical plastic body (15) conta ...