Visedo Oy

Finland

Visedo Oy

Finland
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Patent
Visedo Oy | Date: 2017-08-09

An electric power system comprises a direct voltage rail (101), battery elements (102-104) connected with supply-converters (105-107) to the direct voltage rail, and load-converters (111-113) for converting direct voltage of the direct voltage rail into voltages suitable for loads of the electric power system, where the supply-converters and the load-converters are connected with over-current protectors (108-110, 114-116) to the direct voltage rail. The electric power system further comprises a capacitor system (117) connected to the direct voltage rail and capable of supplying fault current for switching an over-current protector into a non-conductive state in response to a fault causing a voltage drop at an electrical node connected to the direct voltage rail via the over-current protector. The capacitor system may comprise one or more high-capacitance electric double layer capacitors. The fault current available from the capacitor system enables a selective protection.


Patent
Visedo Oy | Date: 2017-03-01

An intermediate circuit system comprises a first capacitor system (102) between a first pole (105) and a second pole (106), a second capacitor system (103) between a third pole (107) and the second pole, and a coupling circuit (104) between the first and third poles. The coupling circuit comprises an inductive element (108), a controllable switch (109) between a first end of the inductive element and the first pole, and another controllable switch (110) between the second end of the inductive element and the third pole. The coupling circuit further comprises a switching component (111) for conducting current from the second pole to the first end of the inductive element and another switching component (112) for conducting current from the second pole to the second end of the inductive element. Thus, the coupling circuit is capable of acting as a chopper circuit between the first and second capacitor systems. The figure proposed to be presented with the abstract: Figure 1 b.


Patent
Visedo Oy | Date: 2017-02-06

An electric power system includes a direct voltage rail (101), battery elements (102-104) connected with supply-converters (105-107) to the direct voltage rail, and load-converters (111-113) for converting direct voltage of the direct voltage rail into voltages suitable for loads of the electric power system, where the supply-converters and the load-converters are connected with over-current protectors (108-110, 114-116) to the direct voltage rail. The electric power system further includes a capacitor system (117) connected to the direct voltage rail and capable of supplying fault current for switching an over-current protector into a non-conductive state in response to a fault causing a voltage drop at an electrical node connected to the direct voltage rail via the over-current protector. The capacitor system may include one or more high-capacitance electric double layer capacitors. The fault current available from the capacitor system enables a selective protection.


Patent
Visedo Oy | Date: 2017-09-13

A bearing housing structure (101) comprises a support section (102) for supporting a bearing (117), a reception interface (103) for receiving lubrication grease, and grease channels (104-106) for conducting the lubrication grease to both sides of the bearing which are mutually opposite in the axial direction of the bearing. The bearing housing structure comprises exit conduits (107, 108) for allowing the lubrication grease to exit the bearing from the both sides of the bearing and a grease reservoir (109) for storing the lubrication grease exiting the bearing via one or more of the exit conduits. The bearing housing structure is capable of operating in different positions so that the axial direction of the bearing can be horizontal, vertical, or slanting.


Grant
Agency: European Commission | Branch: H2020 | Program: IA | Phase: MG-4.1-2014 | Award Amount: 21.30M | Year: 2015

E-ferry addresses the urgent need for reducing European CO2 emissions and air pollution from waterborne transportation by demonstrating the feasibility of a 100% electrically powered, emission free, medium sized ferry for passengers and cars, trucks and cargo relevant to island communities, coastal zones and inland waterways. The vessel will be based on a newly developed, energy efficient design concept and demonstrated in full-scale operation on longer distances than previously seen for electric drive train ferries (> 5 Nm), i.e. the medium range connections Soeby-Fynshav (10.7 Nm) and Soeby-Faaborg (9.6 Nm) in the Danish part of the Baltic Sea, connecting the island of Aeroe (r) to the mainland. E-ferry builds on the Danish ERDF funded project Green Ferry Vision proving feasibility of the concept to be demonstrated and indicating significant potential impacts compared to conventionally fuelled ferries operating on the same medium range routes; energy savings of up to 50%, annual emission reductions of approx. 2,000 tonnes CO2, 41,500 kg NOx, 1,350 kg SO2 and 2,500 kg particulates. E-ferry is likely to be the one with the largest battery-pack ever installed in a ferry with a record breaking high charging power capacity of up to 4 MW allowing for short port stays. On top of being 100% powered by electricity, the innovative novelties of the E-ferry design concept and its expected impacts addresses flaws in current state-of-the-art by demonstrating a concept based on optimised hull-shape, lightweight equipment and carbon composite materials, ensuring reduced weight by up to 60% on parts replaced by composite elements. Approval of the use of carbon fibre-reinforced composite modules in E-ferrys superstructure according regulation through material and fire testing also is key to the project. The strong industrial, maritime and public partners also will assure dissemination of results and push for a widespread market up-take of the E-ferry concept.


A device (101) for producing a position signal indicative of rotational position of a resolver is presented. The device comprises a signal transfer interface (102) for receiving first and second alternative signals, and a processing system (103) for generating the position signal on the basis of the amplitudes of the first and second alternative signals and the polarity of an excitation signal of the resolver. The device is configurable to operate in a first operational mode where a local signal generator (104) generates the excitation signal and the device transmits the excitation signal to the resolver. The device is configurable to operate also in a second operational mode where the device receives information indicative of the polarity of the excitation signal from another device. Thus, devices of the kind described above can be used in a system where many converters are driving separate windings systems of an electrical machine.


An electromechanical power transmission chain comprises an electrical machine (101) connectable to a combustion engine and to a mechanical load, a storage circuit (104) for storing electrical energy, an electronic power converter (109) for transferring electrical energy between the storage circuit and the electrical machine, and a control system (110) for controlling the combustion engine and the electronic power converter. The control system controls the electronic power converter to transfer electrical energy from the storage circuit to the electrical machine in response to a peak-load situation where power demand of the mechanical load is above an advantageous power range of the combustion engine. The control system limits the fuel supply of the combustion engine during the peak-load situation so as to restrain the fuel consumption from increasing due to the peak-load situation.


Patent
Visedo Oy | Date: 2016-03-02

A capacitor module comprises at least one capacitor element (101) and a cooling structure (103) for cooling the capacitor element. The electrical terminals (102a, 102b) of the capacitor element are mechanically connected to the cooling structure to be in heat-conductive relations with the cooling structure so that at least one of the electrical terminals of the capacitor element is mechanically connected to the cooling structure via a flexible connection element (104a, 104b) made of electrically conductive material. The flexible connection element allows the corresponding electrical terminal to move with respect to the cooling structure when the distance (D) between the electrical terminals is changing because of changes in load and/or temperature, and/or because of ageing.


Patent
Visedo Oy | Date: 2016-11-09

A stator (100) for an outer rotor electrical machine comprises stator windings (103) and a core structure (101) comprising ferromagnetic material. The core structure comprises a yoke (102) and stator teeth connected to the yoke. The stator comprises a cooling element (104) located in a cavity constituted by the yoke and being in a heat conductive relation with the yoke. A surface of the cooling element has a mechanical contact with a surface of the cavity so as to provide the heat conductive relation. The mutually contacting surfaces of the cooling element and the cavity are conical so as to facilitate arranging the mechanical contact between the yoke and the cooling element. The conical shapes of the surfaces make it possible to maintain the heat conductive relation with the aid of tensioning devices, e.g. screws and/or springs, for generating axial force pressing the cooling element axially against the yoke.


A device (101) for producing a position signal indicative of rotational position of a resolver is presented. The device comprises a signal transfer interface (102) for receiving first and second alternative signals, and a processing system (103) for generating the position signal on the basis of the amplitudes of the first and second alternative signals and the polarity of an excitation signal of the resolver. The device is configurable to operate in a first operational mode where a local signal generator (104) generates the excitation signal and the device transmits the excitation signal to the resolver. The device is configurable to operate also in a second operational mode where the device receives information indicative of the polarity of the excitation signal from another device. Thus, devices of the kind described above can be used in a system where many converters are driving separate windings systems of an electrical machine.

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