ANORDNUNG ZUR ÜBERTRAGUNG VON STEUERBEFEHLEN IN EINER NETZBETRIEBENEN VORRICHTUNG ODER MASCHINE

摘要

PCT No. PCT/SE93/00168 Sec. 371 Date Nov. 4, 1993 Sec. 102(e) Date Nov. 4, 1993 PCT Filed Feb. 26, 1993 PCT Pub. No. WO93/18568 PCT Pub. Date Sep. 16, 1993.An arrangement in an apparatus or a machine operated from the mains for the transfer of control commands to at least one working means (24) in the apparatus or machine, e.g. a motor or the like, via a wire (13) also used for the power supply to said working means. The arrangement comprises a control unit (10) provided for creating a control command by suppressing, in a predetermined order, at least part of one or several consecutive half-periods of a predetermined polarity of the supply voltage. Moreover, the arrangement comprises a slave unit (11) operating in response to the control command transmitted to activate the working means (24). The control unit (10) has such a design that before a control command is transmitted the control unit operates to shortly disconnect the supply voltage on the wire (13) for a period of time required for the current in the working means (24) to decline essentially to zero.