Electronic Commutator Direct Current (ECDC) machine

Conventional DC motors are highly efficient and their characteristics make them suitable for use.However, their major drawback is that they need a commutator and brushes which are subject to wear and require maintenance. Today new technology is attempting to replace these components and reduce permanently these maintenance costs. When the task of commutator and brushes are replaced by solid-state switches, free maintenance motors are invented and the new motor called brushless DC motors emerged.This paper describes another motor which uses an electronic commutator substituting the mechanical commutator and brushes in the DC machine. This electronic commutator is formed with a series of static converters mounted along a bridge structure connected between the two rings and the windings of the machine. The polarities of the machine are obtained using two brushes in contact with the two rings. The control of the converter transistors is achieved by phototransistors controlled by two light sources replacing the brushes, so the sliding electrical contact between brushes and commutator was removed.

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► This work describes an Electronic Commutator DC (ECDC) machine.
► It gives amelioration to DC and BLDC machine.
► Our ECDC machine used an electronic commutator replacing the mechanical commutator.
► This electronic commutator was connected between two rings and the machine windings.
► Electronic switching in power components replaces ordinary electrical switching..