Abstract:
One or more actuator driven devices on a sheet forming machine receive power and engage in bi-directional communications with one or more quality control systems either by having no physically connected cables to transmit the power to the actuators and no physically connected cables used for the bi-directional communications; or contactless power and communication on a power cable; or a cable connected from the power source to the actuators to provide both power and bi-directional communications; or power is provided to the actuators by a cable and the bi-directional communications are wireless.
Abstract:
The invention relates to a device (20) for supplying power to at least one field device (10) comprising a measuring module (12), a control, data capture and processing module (14) and a communications unit (15), located in a technical installation, said device (20) supplying the voltage required to operate the field device. The installation is equipped with at least one electric cable (1), which is connected to an installation voltage that forms part of one of the conventional component voltage systems in technical installations. The device (20) comprises a current transformer with at least one terminal (21) on the input side and one terminal (38) on the output side and with an appropriate transformer region for adapting the respective component voltage system to the voltage of the devices, in addition to a connecting cable (4) and a connecting element (3) for attaching to the electric cable(s) (1). The current transformer comprises (20a) a network of sub-area current transformers (26, 28, 30, 32, 26', 28', 30', 32') in the network nodes and at least one switching element (27, 29, 31, 33, 27', 29', 31', 33') in at least one meshed network. The current transformer also comprises a control unit (22) for controlling the switching elements (27, 29, 31, 33, 27', 29', 31', M), enabling the current path between the input and output interfaces (21, 38) to be composed by activating a corresponding number of suitable sub-area current transformers (26, 28, 30, 32, 26', 28', 30', 32') in series, thus creating the appropriate transformer region for adapting the respective component voltage system to the voltage of the devices.
Abstract:
The invention relates to a proximity sensor comprising a sensor head for generating sensor signals, whereby the proximity sensor is divided into a fastening section (1, 3), which contains the sensor head, and into an electronic section (2). Said electronic section can be connected to the fastening section and has at least one sensor signal evaluation unit and a power supply. The sensor signals travel from the fastening unit (1, 3) to the electronic section (2) via electric contacts or in a contactless manner. The invention also relates to a modular system for producing proximity sensors which is comprised of a multitude of fastening sections (1, 3) each containing a sensor head and having different dimensions, and of electronic sections (2) which can be connected to said fastening sections and which are identical in each case.
Abstract:
A method for controlling a plurality of power converters connected to a power supply network is described. Each power converter comprises high-power semiconductor devices. Control signals are sent between a controller and a wireless node of one or more of said plurality of power converters using a wireless communication system. The control signals are transmitted to a local wireless node of one or more of a plurality of power converters. The data transmissions include data packets comprising control information such that a clock of the local wireless node can be synchronized using time synchronization information of the wireless communication system. In other aspects of the invention a system employing the method and a computer program for carrying out the method are described.
Abstract:
A system for a machine, in particular an automated production machine, has a large number of proximity sensors. Each proximity sensor has at least one secondary winding that is suitable for drawing power from a medium-frequency magnetic field. At least one primary winding, which is fed from a medium-frequency oscillator, is provided for supplying the proximity sensors with electrical power without using wires. Each proximity sensor is equipped with a transmitting device that emits radio signals, which contain sensor information of interest, to a central receiving device that is connected to a process computer for the machine. A proximity sensor and a primary winding for this purpose are also proposed.
Abstract:
The arrangement has a three-dimensional winding arrangement formed from a central core (1-3) of magnetically active material on which at least three windings (4-9) are mounted with mutually perpendicular axes intersecting at a common point. The core can be cubic or spherical with grooves for accommodating the windings.
Abstract:
A method to control an industrial robot with a tool including at least one actuator. The industrial robot has at least one robot arm with a tool holder arranged on the arm. A contactless power supply is provided to the at least one actuator of the tool. Control signals are transmitted to and/or received from at least one wireless node including a radio communicator arranged on the tool. Radio technology is utilized that works in a high frequency band from 400 MHz and higher with significant interference suppression by spread spectrum technology.
Abstract:
The magnetic field generating device has at least one coil forming a resonance circuit with at least one resonance capacitor. At least two separate feed circuits are provided for supplying a coil with at least two windings, each of which supplies at least one winding. Each of several coils (1-3) can be connected to a separate feed circuit (33-35).
Abstract:
The device has a comparator (15) for determining deviations between a predefined demand value and a detected actual value of the magnetic field strength and reference value generator (14) for specifying an electrical parameter for determining and regulating the generated field strength, whereby the comparator specifies or alters the reference signal depending on the current actual/demand deviation.