Circuit arrangement for parallel connection of any chosen number of pulse invertors

摘要

For a circuit arrangement for parallel connection of any chosen number of pulse invertors with the same output power, each supplied from a mains via a mains rectifier and a DC voltage intermediate circuit, the intention is to keep the electronic complexity for control and regulating as low as possible. For this purpose, a transmission device (31, 32...3n) is assigned to each pulse invertor which device supplies to a superordinate signal distribution device (200), existing in only one of the pulse invertors, regulating parameters corresponding to the currents flowing in the intermediate circuit and at the output of the corresponding pulse invertor, as well as monitoring signals in respect of excessively high currents and excessively high or excessively low intermediate-circuit voltages as well as switching-state signals, depending on the blocking of the switching elements of the pulse invertor. The signal distribution device (200) forms common regulating parameters for a superordinate control and regulating device (100), common safety signals and a common switching-state signal. The control and regulating device (100) regulates the total current for the pulse invertors, delivers control pulses (ZS) for the individual pulse invertors via the transmission devices (31, 32...3n) which are connected in series with each other for this purpose, and outputs a release signal (F) for transmission of the control pulses to the individual transmission devices whenever the common monitoring and switching-state signals have no ... Original abstract incomplete. <IMAGE>