| Patent application number | Description | Published |
|---|
| 20080261574 | Extending Wlan Signalling - The present invention relates to a method, device, instruction set, and signal for communicating the availability of additional information in access points relevant for determining in a mobile station which access point to connect to. An information tag is inserted into a beacon signal alerting of the additional information available; mobile stations not implemented with the present invention may operate as if the information tag was not present and thus ensuring compatibility between systems. | 10-23-2008 |
| 20100153715 | PACKET HANDLING IN A MOBILE IP ARCHITECTURE - A method of handling IP packets transmitted from a correspondent node to a mobile node via an intermediate node using the IPsec security protocol. The method comprises, at the correspondent node, identifying specified selector information within the part of the packet to be encrypted, and incorporating the identified information or a digest thereof into a header part of the packet which is to be sent unencrypted, transmitting the packet from the correspondent node to said intermediate node, and, at the intermediate node, receiving the transmitted packet and identifying a policy to be applied to the packet using said information or digest contained in the packet, and applying the policy to the packet. | 06-17-2010 |
| 20100226310 | INTERFACE SELECTION IN A MOVING NETWORK - A method of establishing a traffic route for a mobile network node attached to a mobile router, where the mobile router has a plurality of upstream interfaces available to it. The method comprises sending from the mobile router to the mobile node, identifiers of the interfaces and of their properties, the identifiers mapping to IPv6 traffic classes or IPv4 type of service. In the case of IPv6, the identifiers may be contained within router advertisement messages broadcast by the mobile router. At the mobile network node, an interface is chosen based upon the identified interface properties. The traffic class or type of service field of at least certain outgoing packets includes the identifier of the chosen interface. At the mobile router, packets are routed across the interface corresponding to the identifier contained in the traffic class or type of service fields, typically using rules created upon detection of a traffic class value in a packet header. | 09-09-2010 |
| Patent application number | Description | Published |
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| 20090300090 | APPARATUS AND METHOD FOR DETERMINING RESOLVER ANGLE - The invention concerns a method and apparatus ( | 12-03-2009 |
| 20090322273 | METHOD AND APPARATUS FOR CONTROLLING A MOTOR - The invention concerns a method and an apparatus for controlling a three-or-more-phase motor driven by a frequency converter. In the method, a change-over switch of the frequency converter is controlled to a continuously conducting state and at the same time the phase voltages or phase currents of the other phases are controlled by switching the change-over switches in those motor phases at a switching frequency substantially higher than the frequency of the fundamental wave of the phase voltage or phase current. The apparatus comprises in conjunction with the frequency converter a number of change-over switches, at least one change-over switch for each motor phase. The change-over switches comprise controllable change-over contacts. The apparatus further comprises in conjunction with the frequency converter means for determining the motor phase currents and means for controlling the change-over contacts. | 12-31-2009 |
| 20100187046 | RESTRICTION OF OUTPUT OF ELECTRICAL DRIVE AND PROTECTION OF AN ELEVATOR - The invention discloses a method for restricting the output of an electrical drive, and also a protection of an elevator. The electrical drive comprises a motor as well as a power supply appliance of the motor. In the method for restricting the output of an electrical drive the stator voltage vector is restricted to its limit value restricting only the component of the stator voltage in the direction of the q axis. In the protection of an elevator, the elevator comprises a machinery brake, a safety brake of the elevator car, and also an electrical drive. The protection of an elevator comprises a determination of at least one limit value, a restriction of the output of the electrical drive on the basis of at least one determined limit value, and also a restriction of the movement of the elevator car on the basis of at least one determined limit value. | 07-29-2010 |
| 20100300815 | MOVEMENT CONTROL OF AN ELEVATOR SYSTEM - A determination of the loading state of an elevator system and also a method for determining the loading state of an elevator system is described. The elevator system includes an elevator car and also a motor drive for moving the elevator car. The loading state of the elevator system is determined on the basis of the position deviation of the elevator motor that occurs during the determination of the loading state. | 12-02-2010 |
| 20110037421 | DETERMINATION OF THE POSITION OF THE ROTOR OF AN ELECTRIC MACHINE - The invention relates to a frequency converter, and also to a method for determining the position of the rotor of an electric machine. The frequency converter comprises a load bridge and also a control of the load bridge, for supplying electricity between the load bridge and an electric machine connected to the load bridge. The frequency converter comprises a determination for at least one electrical parameter of the aforementioned electric machine, and the frequency converter comprises a determination for the position of the rotor of the aforementioned electric machine. The load bridge is fitted to supply a first alternating electricity excitation signal, which is formed in relation to the electrical angle of the electric machine, to the aforementioned electric machine. The frequency converter is further fitted to determine the first alternating electricity response signal corresponding to the aforementioned first alternating electricity excitation signal, and the position of the rotor is determined on the basis of the first alternating electricity response signal. | 02-17-2011 |
| 20110108369 | DETERMINATION OF THE MOVEMENT OF A SYNCHRONOUS MACHINE - The invention relates to a method and an apparatus for determining the movement of a synchronous machine. The apparatus for determining the movement of a synchronous machine comprises a determination for at least one electrical magnitude of the synchronous machine; a determination of the position error of the rotor of the synchronous machine, which is fitted to determine the position error of the rotor on the basis of the aforementioned at least one electrical magnitude of the synchronous machine; and also a correction of the movement signal of the incremental sensor, which is fitted to correct the read movement signal of the incremental sensor on the basis of the aforementioned determination of the position error of the rotor of the synchronous machine. | 05-12-2011 |
