System and method of regulation of speed to the motor is an excitation series, and the corresponding motor

摘要

System (1) in order to regulate the speed of a motor (m) in series with an armature winding (ei) and at least one excitation winding (e1, e2) in series with the armature coil (ei), comprising a speed variator (tr) in order to deliver a unidirectional adjustable voltage across the terminals of the motor (m) and a control module (cd) of the control module (tr). this system (1) comprises at least one free wheel diode (d1, d2) connected in parallel on at least one of the excitation windings (e1, e2), and the control module (cd) is arranged to treat a against - back electromotive force generated at the terminals of the motor (m) for the circulation of a current in the free wheel diode (d1, d2) in the sequences of the current in the armature coil (ei). Use in particular for regulating the speed of a universal motor in household appliances and.