Arrangement for the transfer of control commands in an apparatus or a machine operated from the mains
First Claim
1. An arrangement in a machine operated from the mains for the transfer of control commands to at least one working means (24) in the machine via a wire (13), said wire also being used to connect the power supply to said working means, the arrangement comprising a control unit (10) for creating a control command by suppressing, in a predetermined order, at least part of one or several consecutive half-periods of the supply voltage, and a slave unit (11) operating in response to the control command transmitted to activate the working means (24), wherein the control unit (10) is designed such that, before the 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.
2 Assignments
0 Petitions
Accused Products
Abstract
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.
45 Citations
7 Claims
- 1. An arrangement in a machine operated from the mains for the transfer of control commands to at least one working means (24) in the machine via a wire (13), said wire also being used to connect the power supply to said working means, the arrangement comprising a control unit (10) for creating a control command by suppressing, in a predetermined order, at least part of one or several consecutive half-periods of the supply voltage, and a slave unit (11) operating in response to the control command transmitted to activate the working means (24), wherein the control unit (10) is designed such that, before the 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.
Specification