Patent application number | Description | Published |
20090166157 | Roller Drive and Roller Transportation Device - There is described a roller drive and a roller transport device equipped with the roller drive. The roller drive comprises an electric machine and ends, wherein at least one end has a heat-conducting end contact face. The contact face is intended for coming into heat-conducting contact with a side cheek of the roller transport device. This allows the cooling to be improved. Furthermore, the roller drive can also be designed in such a way that it has a device for accommodating electrical components, wherein the device is intended as a torque support for the electric machine. A regulating device and/or a communication device can also be integrated into the device. | 07-02-2009 |
20090273437 | KEY-OPERATED SWITCH - A key-operated switch includes a first excitation device which generates a first alternating magnetic field and has a first inductance. The key-operated switch is constructed in such a manner that the first alternating magnetic field can be used to scan a first coding of a key, with the first coding changing the first inductance of the first excitation device. The first coding is read by the key-operated switch in this manner. The key associated with the key-operated switch has a carrier element which is not electrically conductive and is not magnetizable. Arranged on the carrier element is the first coding which is made of an electrically conductive and/or magnetizable material. As a result, the key can be scanned without wear. | 11-05-2009 |
20090302699 | METHOD FOR MOUNTING A BODY - In a magnetic bearing arrangement, support coils are connected in series and can be fed with a current. By coupling a point connecting the two support coils to a voltage source, the support coils can be used as actuating elements and, by feeding the support coils with voltage pulses, the inductance of the support coils can be inferred which is an indication of the position of the body to be mounted. This provides for a position control arrangement. Using one and the same support coils, both a stably controlled load-bearing capacity can thus be produced and at the same time a position sensor can be replaced. | 12-10-2009 |
20100121467 | CONTROL ARRANGEMENT WITH CORRECTION MEANS FOR SYSTEMATIC POSITION-DEPENDENT ERRORS - A control arrangement for an electric drive with a control which processes desired values and actual values of the electric drive in relation to a desired-actual control is provided. A determination device determines a derived variable in an iterative manner in accordance with the actual values and the derived variable is fed to an evaluation device. The evaluation device associates the derived variables with position values of the drive and determines, after accumulating several derived variables, characteristic values of a systematic error in the desired values and/or the actual values. In accordance with the determined characteristic values, the evaluation device determines correction values and switches the correction values to the desired values, the actual values or the difference of desired and actual values. | 05-13-2010 |
20100122086 | METHOD FOR COMBINING DATA TO BE PROCESSED WITH A DATA-SPECIFIC APPARATUS, AND APPARATUS AND COMPUTER PROGRAM FOR IMPLEMENTING THE METHOD - The invention discloses a method and a system for combining data with an apparatus which is provided for processing the data, with the following steps: (a) determining an identifier associated with the apparatus; (b) generating a first key by using the identifier and a second secret key, which is independent of the identifier; (c) generating a decryption algorithm to be used for the second key and providing the decryption algorithm to the apparatus; (d) encrypting a rights object, which allows access to the data, using the first key and the second secret key; (e) transmitting the data and the rights object to the apparatus; (f) decrypting the rights object with the apparatus by using the identifier associated with the apparatus and the decryption algorithm associated with the apparatus; and (g) decrypting the data using a key selected by a rights owner and included in the decrypted rights object. | 05-13-2010 |
20100122352 | Method for Operating an Installation Using Data Protected Against Unauthorized Use - A method and a device for operating a technical installation using data from a third party are provided, the data being protected against unauthorized use. A first and a second rights object are used for protecting the data, the first rights object specifying an authorized use of the data with a variable not defined in respect of its value and the second rights object defining a value for the variable. | 05-13-2010 |
20100146598 | Method, System and Apparatus for Processing Rights - A method for processing rights granted to an operator of a device or a group of devices using a rights object, wherein the method comprises at least the steps of receiving a rights object from the computer of a third party, generating at least one derived rights object based on the rights object received from the computer of the third party, and forwarding the at least one derived rights object to the device or individual devices from the group of devices. A system is provided which operates in accordance with the method. An apparatus that performs the method is also provided. | 06-10-2010 |
20100181855 | MAGNETIC BEARING CONTROL DEVICE HAVING A THREE-PHASE CONVERTER, AND USE OF A THREE-PHASE CONVERTER FOR CONTROLLING A MAGNETIC BEARING - The invention relates to a magnetic bearing control device and the use of a three-phase converter for controlling a magnetic bearing. According to the invention, a three-phase converter ( | 07-22-2010 |
20110077926 | SIMULATION SYSTEM AND METHOD FOR A TECHNICAL INSTALLATION - A simulation system has a first simulator for simulating a first physical process and configured to store first CAD-based data, a second simulator for simulating a second physical process and configured to store second CAD-based data, and a server configured to process the first CAD-based data from the first simulator and to process the second CAD-based data from the second simulator. | 03-31-2011 |
20130121831 | DRIVE OF A TAIL ROTOR OF A HELICOPTER - The invention relates to a drive ( | 05-16-2013 |
20130152394 | INDUCTIVE HARDENING OF TEETH OF GEARWHEELS - In a method for manufacturing a gearwheel, a gearwheel blank is clamped in a workholder of a multi-axis machine tool. A milling head is clamped in a tool holder which is rotated by a spindle drive to enable the milling head to mill out tooth spaces of the gearwheel blank to thereby create a gearwheel having teeth. After replacing the milling head in the tool holder with an inductor, the inductor is inserted successively between two adjacent teeth of the gearwheel and supplied with alternating current from a current supply device of the spindle drive to inductively heat at least one of the two adjacent teeth. The inductor in the tool holder is then replaced with a machining tool to remachine the teeth of the gearwheel. | 06-20-2013 |
20130175965 | METHOD FOR ESTIMATING A TORQUE OF A THREE-PHASE DRIVE MOTOR FOR A VEHICLE - A method for estimating a torque of a three-phase motor for a vehicle includes measuring a respective current strength in at least two of three phase lines, wherein the three-phase motor is supplied with power by a converter, and wherein the three phase lines lead from the converter to the three-phase motor of the vehicle, measuring a respective voltage at each of the three phase lines, determining a rotating field frequency as a function of the measured current strengths or the measured voltages; and determining an estimated value for the torque as a function of the measured current strengths, the measured voltages and the determined rotating field frequency. | 07-11-2013 |
20130181645 | DRIVE SYSTEM AND METHOD FOR OPERATING SUCH A DRIVE SYSTEM - A drive system for an electric motor includes a connection for a battery, and an inverter having an input side connected to an intermediate circuit and an output side having a connection for an electric motor. The intermediate circuit includes a first thyristor connected in parallel with an intermediate circuit capacitance. The drive system may also include a rectifier having an input side connected at the output side of the inverter in parallel with the electric motor, and a second thyristor connected an output side of the rectifier. The first/second thyristor are configured to be activated by a monitor incorporated in or assigned to the drive system. In the event of a malfunction, the input and/or output side of the inverter can be electrically isolated to allow a multiply redundant armature short circuit. | 07-18-2013 |
20140026681 | METHOD AND APPARATUS FOR DETERMINING AN ELECTRICAL TORQUE OF AN ELECTRICAL MACHINE - A method for determining an electrical torque of an electrical machine includes determining an electrical torque in a first speed range with a first algorithm, and determining the electrical torque in a second speed range with a second algorithm which differs from the first algorithm. An upper limit of the second speed range is slightly higher than a lower limit of the first speed range. An apparatus is provided to determine the electrical torque of the electrical machine with the aforedescribed method. | 01-30-2014 |
20140320050 | POWER CONVERTER CIRCUIT - A power converter circuit has at least two submodules connected in a series circuit and receiving electrical power from a power source outputting a DC voltage, via an inductance. Each submodule has, on the input side, a single-phase half bridge and, on the load side, a single-phase full bridge, wherein the half bridge and the full bridge are connected on the DC voltage side in parallel with an intermediate circuit capacitor. At least one electrical line composed of several current paths connected in parallel with one another is formed in each submodule. | 10-30-2014 |
20140339940 | METHOD FOR OPERATING A THREE-PHASE INVERTER OF A CONVERTER-FED MAGNETIC BEARING - In a method for operating a three-phase inverter of a converter-fed magnetic bearing, two coils are connected to respective outputs of the three-phase inverter at one end and are connected to each other and to a third output of the three-phase inverter at the other end. A variable control current is injected into the third output. A constant bias current flows between the respective outputs and thus serially through the two coils. The control current is divided among the two respective outputs so as to flow parallel through the two coils. This arrangement significantly reduces the effective current load of the three-phase inverter and significantly increases the slew rate of the control current. | 11-20-2014 |