Multiple asynchronous rectifier machines - are operated by LC filter on mains side controlling pulse current rectifier input voltage

摘要

Torque and speed of the asynchronous rectifier machines are controlled, and the machines are supplied from the mains through a rectifier unit consisting of a pulse current rectifier and phase sequence rectifier with impressed intermediate circuit current. Input voltage (Uc) of the pulse current rectifier can be controlled within a freely selectable sinusoidal tolerance band using a filter (Li, C) on the main side. The single phase network has a transformer (T) on the main's side and has the pulse current rectifier (PSR) connected with a phase following rectifier (PFSR) on the secondary side. A number of measured value converters (MUuO) are connected to tappings at various stages in the circuit.