Abstract: A common mode choke (20) for connecting to DC side of a power converter (100). The common mode choke (20) includes a choke core (21) having a first core portion (21A) and a second core portion (21B) for guiding magnetic flux (F). The common mode choke (20) also includes a first winding (24) and a second winding (25) for generating magnetic flux, wherein both of the windings (24, 25) have series-connected first (24A, 25A) and second portions (24B, 25B), respectively. The first portion (4A) of the first winding (24) and the first portion (25A) of the second winding (25) are concentrically around the first core portion (21A), and the second portion (24B) of the first winding (24) and the second portion (25B) of the second winding (25) are concentrically around the second core portion (21B).

Abstract: A DC-link charging arrangement is described having a DC-link capacitor, rectifier means, and contactor means arranged between supply voltage ports and the rectifier means and having at least one contactor. Such a charging arrangement should enable charging of a DC-link capacitor in a simple way with low losses. To this end a charging capacitor is arranged bridging the at least one contactor.

Abstract: A mower is provided and includes: a case; a charging circuit provided in the case, and a combination of a wheel assembly and a charging interface assembly arranged on the case. The combination is electrically connected to the charging circuit. The combination includes: a wheel assembly; and a charging interface assembly electrically connected to the charging circuit. The wheel assembly and the charging interface assembly are integrated molding structure.

Abstract: A robotic mower and method for controlling a robotic mower to a predetermined position, by means of a guide wire. The robotic mower includes a control unit and at least one sensor. At least one of the sensors detects a signal from the guide wire and follows the guide wire at a first distance that is randomly determined. The robotic mower follows the guide wire until detecting, by means of the at least one sensor, a signal from a boundary wire and then following the boundary wire at a second distance, which is randomly determined. When detecting that the signal strength from the guide wire falls outside a first predetermined threshold, the robotic mower starts following the guide wire again.

Abstract: A system including a boundary wire and a charging station loop. The boundary wire makes a loop in the charging station that is narrower than and crosses the charging station loop. A return signal is received from a control unit commanding a robotic mower to return to the charging station. The robotic mower is controlled to follow the boundary wire until the charging station loop is detected. The robotic mower then follows the charging station loop until detection of a crossing between the charging station loop and the boundary wire loop. The robotic mower follows the charging station loop a first distance, and then moves in a direction straight forward for a second distance. When the robotic mower has moved the second distance it is turned a predefined angle towards the charging station and follows the boundary wire loop until reaching a charging position.

Abstract: A method for a direct current (DC) power distribution arrangement and a direct current (DC) power distribution arrangement, comprising a plurality of DC power distribution subsystems. Each DC power distribution subsystem comprises an inverter unit (INU) configured to operate as a subsystem-specific circuit breaker for intercoupling/separating the DC power distribution subsystem to/from the rest of the DC power distribution arrangement.

Abstract: A method and a system for docking a robotic mower with a charging station, the system including a boundary wire and a charging station loop wherein the boundary wire makes a loop in the charging station that is narrower than and crosses the charging station loop. A return signal is received from a control unit commanding the robotic mower to return to the charging station. In response thereto, the robotic mower is controlled to follow the boundary wire until the charging station loop is detected. The robotic mower then follows the charging station loop until a crossing between the charging station loop and the boundary wire loop is detected. Thereafter, the robotic mower is controlled to follow the charging station loop a first distance, and then continuing to drive the robotic mower in a direction straight forward for a second distance.

Abstract: A filter arrangement in connection with a power converter for transferring power between a multiphase AC voltage network and a DC voltage network. The filter arrangement comprises a differential mode coil coupled between each AC terminal of an inverter bridge and corresponding AC network phase terminal, and a common mode coil coupled between each inverter bridge DC terminal and corresponding DC network terminal. Both inductors are located in the same magnetic core structure such that each of the differential mode winding is wound around its own phase-specific core leg and all common mode windings are wound around their own single core leg. The winding direction of both AC- and DC-side inductor windings is such that a common-mode current which flows along both inductors in the same direction, induces in each magnetic core leg a flux which reinforces the total flux circulating in the magnetic core.

Abstract: A converter circuitry between a first network, which may be either a poly-phase medium-voltage alternating current (AC) network, at least one polyphase low-voltage AC network or at least one direct-current (DC) network, and a second network, which may be either a polyphase medium-voltage AC network or a medium-voltage DC network, wherein the converter circuitry comprises at least one power bus and low-voltage power cells both at the first and at the second network side such that each power cell is connected to a power bus via a transformer. Each power bus is connected to a low-voltage power unit, which is able to supply pre-charging power via the power bus to all power cell intermediate DC-link filtering capacitors before the converter is started. The low-voltage power unit is also able to take care of a resistor braking in case the first network cannot take the power supplied by the load connected to the second network.

Abstract: A mower is provided and includes: a case; a charging circuit provided in the case, and a combination of a wheel assembly and a charging interface assembly arranged on the case. The combination is electrically connected to the charging circuit. The combination includes: a wheel assembly; and a charging interface assembly electrically connected to the charging circuit. The wheel assembly and the charging interface assembly are integrated molding structure.

Abstract: A filter arrangement in connection with a power converter for transferring power between a multiphase AC voltage network and a DC voltage network. The filter arrangement comprises a differential mode coil coupled between each AC terminal of an inverter bridge and corresponding AC network phase terminal, and a common mode coil coupled between each inverter bridge DC terminal and corresponding DC network terminal. Both inductors are located in the same magnetic core structure such that each of the differential mode winding is wound around its own phase-specific core leg and all common mode windings are wound around their own single core leg. The winding direction of both AC- and DC-side inductor windings is such that a common-mode current which flows along both inductors in the same direction, induces in each magnetic core leg a flux which reinforces the total flux circulating in the magnetic core.

Abstract: An inductor assembly for use in a power converter for transferring power between a DC voltage network and a multiphase AC voltage network. The inductor assembly comprises a core for guiding magnetic flux and coils for generating magnetic flux wherein the core has first legs with differential mode coil wires wound around the first legs and at least one second leg with at least two common mode coil wires wound around said second leg. The winding direction of both AC- and DC-side coils is such that a common-mode electrical current which flows in both coils in the same direction induces in each core leg a magnetic flux which reinforces the total flux circulating in the core.

Abstract: A package (1) for storing a food product is provided. The package (1) comprises a bottom part (3) formed by a thermoplastic material, a main body (2) formed by a packaging material, wherein the main body (2) is in the form of a sleeve comprising a top section (14) and a base section (12), said base section (12) being connected to the bottom part (3), wherein the top section (14) of the main body (2) is sealed transversally forming a fluid-tight closure of the package (1).

Abstract: An electric system comprising communication link between a signal transmitting end and a signal receiving end, wherein, at the signal transmitting end, a number of data bits are integrated into a low frequency signal to form an integrated signal. Each data bit is transmitted as part of a symbol. Each symbol comprises a predefined number of bits encoding at least one data bit, the state of some of the bits of each symbol being dependent on the state of the low frequency symbol.

Abstract: A DC-link charging arrangement is described having a DC-link capacitor (C4), rectifier means (S17-S22), and contactor means arranged between supply voltage ports (U, V, W) and the rectifier means (S17-S22) and having at least one contactor (13-15). Such a charging arrangement should enable charging of a DC-link capacitor in a simple way with low losses. To this end a charging capacitor (Cch1-Cch3) is arranged bridging the at least one contactor (13-15).

Abstract: A robotic mower and method for controlling a robotic mower to a predetermined position, by means of a guide wire. The robotic mower includes a control unit and at least one sensor. At least one of the sensors detects a signal from the guide wire and follows the guide wire at a first distance that is randomly determined. The robotic mower follows the guide wire until detecting, by means of the at least one sensor, a signal from a boundary wire and then following the boundary wire at a second distance, which is randomly determined. When detecting that the signal strength from the guide wire falls outside a first predetermined threshold, the robotic mower starts following the guide wire again.

Abstract: A method of providing remote control of a robotic vehicle may include receiving an instruction directing setup of a connection for communication between a robotic vehicle and an electronic device configurable to interface with the robotic vehicle remotely, providing a pairing code to one of the robotic vehicle or the electronic device for display of the pairing code at the one of the robotic vehicle or the electronic device, receiving an indication of entry of the pairing code at the other of the robotic vehicle or the initiate pairing electronic device, establishing a communication link for operably coupling the robotic vehicle and the electronic device responsive to receipt of the indication, and enabling an operator to remotely interact with the robotic vehicle at the electronic device via the communication link.

Abstract: A converter circuitry between a first network, which may be either a poly-phase medium-voltage alternating current (AC) network, at least one polyphase low-voltage AC network or at least one direct-current (DC) network, and a second network, which may be either a polyphase medium-voltage AC network or a medium-voltage DC network, wherein the converter circuitry comprises at least one power bus and low-voltage power cells both at the first and at the second network side such that each power cell is connected to a power bus via a transformer. Each power bus is connected to a low-voltage power unit, which is able to supply pre-charging power via the power bus to all power cell intermediate DC-link filtering capacitors before the converter is started. The low-voltage power unit is also able to take care of a resistor braking in case the first network cannot take the power supplied by the load connected to the second network.

Abstract: An electric system comprising communication link between a signal transmitting end and a signal receiving end, wherein, at the signal transmitting end, a number of data bits are integrated into a low frequency signal to form an integrated signal. Each data bit is transmitted as part of a symbol. Each symbol comprises a predefined number of bits encoding at least one data bit, the state of some of the bits of each symbol being dependent on the state of the low frequency symbol.

Abstract: A method and a system for docketing a robotic mower with a charging station. The system includes a boundary wire and a charging station loop wherein the boundary wire makes a loop in the charging station that is narrower than and crosses the charging station loop. A return signal is received from a control unit commanding the robotic mower to return to the charging station. The robotic mower is controlled to follow the boundary wire until the charging station loop is detected. The robotic mower then follows the charging station loop until a crossing between the charging station loop and the boundary wire loop is detected. The robotic mower is controlled to follow the charging station loop a first distance, and then continuing to drive the robotic mower in a direction straight forward for a second distance. When the robotic mower has moved the second distance it is turned a predefined angle towards the charging station and controlled to follow the boundary wire loop until a charging position is reached.