Abstract: A control apparatus for ARCP (Auxiliary Resonant Commuted Pole) power inverters include a modulator and a modulation control. The modulator is configured to carry out a commutation of an ARCP inverter by selectively using a Continuous PWM (CPWM) modulation and a Discontinuous PWM (DPWM) modulation. The modulation control is configured to dynamically select either the CPWM modulation or the DPWM modulation in a such a way that switching losses of the ARCP inverter are reduced while a failure of the commutation of the ARCP inverter due to a neutral point voltage unbalance of the ARCP inverter is avoided.

Abstract: A commutation circuit includes a coil connected to an H bridge, the H bridge including four main switches for reversing polarity and a resulting coil current in the coil. The commutation circuit further includes a voltage source configured to generate a bypass current, and at least one auxiliary switch for controlling the bypass current to thereby decrease a switch current through at least one of the main switches. By generating an appropriate bypass current with help of a voltage source, a switch current through a desired main switch in a leading state can be decreased and eventually brought to zero. Zero current in its turn enables the use of thyristors as main switches as it results in the thyristors to be turned off automatically. Furthermore, decreased switch current at the switching moment reduces switching losses even in different types of switches such as GTOs and IGBTs.

Abstract: A synchronous machine system comprising a synchronous motor including a stator, stator winding, rotor, and field winding; an AC power supply circuit structured to transmit current to or from the stator winding of the synchronous motor at a controlled frequency and transmit current to or from a power source at a controlled frequency; a DC exciter unit structured to receive power from a power source, convert the received power to DC power at a desired voltage, and supply the converted power across a DC bus to the field winding of the synchronous motor; and an energy storage circuit coupled to the DC bus of the DC exciter unit having at least one ultracapacitor, and structured to receive power from a power source, to charge the ultracapacitor, and to provide power to the field winding of the synchronous motor following a power failure.

Abstract: A commutation circuit includes a coil connected to an H bridge, the H bridge including four main switches for reversing polarity and a resulting coil current in the coil. The commutation circuit further includes a voltage source configured to generate a bypass current, and at least one auxiliary switch for controlling the bypass current to thereby decrease a switch current through at least one of the main switches. By generating an appropriate bypass current with help of a voltage source, a switch current through a desired main switch in a leading state can be decreased and eventually brought to zero. Zero current in its turn enables the use of thyristors as main switches as it results in the thyristors to be turned off automatically. Furthermore, decreased switch current at the switching moment reduces switching losses even in different types of switches such as GTOs and IGBTs.

Abstract: The present invention generally relates to the field of treatment of neuronal disorders and more particularly to neurotrophic factor MANF and uses thereof. The present invention provides a pharmaceutical compound comprising MANF nucleic acid molecule, MANF protein or a functional fragment thereof for the treatment of a peripherial neuropathy including Alzheimer's disease, Parkinson's disease, epilepsy, drug addiction and ischemic brain injury.

Abstract: A synchronous machine system comprising a synchronous motor including a stator, stator winding, rotor, and field winding; an AC power supply circuit structured to transmit current to or from the stator winding of the synchronous motor at a controlled frequency and transmit current to or from a power source at a controlled frequency; a DC exciter unit structured to receive power from a power source, convert the received power to DC power at a desired voltage, and supply the converted power across a DC bus to the field winding of the synchronous motor; and an energy storage circuit coupled to the DC bus of the DC exciter unit having at least one ultracapacitor, and structured to receive power from a power source, to charge the ultracapacitor, and to provide power to the field winding of the synchronous motor following a power failure.

Abstract: An arrangement which includes two or more energy storage units for electrical energy connected in series, and two or more balancing resistor units. Each balancing resistor unit is connected in parallel with one of the energy storage units. The arrangement also includes means for determining a voltage over all of the series-connected energy storage units and means for determining the energy storage unit voltages between poles of the energy storage units. One or more of the balancing resistor units include a base resistor unit and a control resistor unit connected in series and a switching device connected in parallel with the control resistor units.

Abstract: The present invention generally relates to the field of treatment of neuronal disorders and more particularly to neurotrophic factor MANF and uses thereof. The present invention provides a pharmaceutical compound comprising MANF nucleic acid molecule, MANF protein or a functional fragment thereof for the treatment of a peripherial neuropathy including Alzheimer's disease, Parkinson's disease, epilepsy, drug addiction and ischemic brain injury.

Abstract: The present invention generally relates to the field of treatment of neuronal disorders and more particularly to neurotrophic factor MANF and uses thereof. The present invention provides a pharmaceutical compound comprising MANF nucleic acid molecule, MANF protein or a functional fragment thereof for the treatment of a peripherial neuropathy including Alzheimer's disease, Parkinson's disease, epilepsy, drug addiction and ischemic brain injury.

Abstract: A method and an arrangement of measuring inverter current, where the inverter is connected to and supplied by a DC intermediate circuit having two or more parallel capacitor branches connected between the positive and negative rail of the DC intermediate circuit, and the capacitance of the capacitor branches being known. The method comprises the steps of measuring the current of one of the parallel capacitor branches, and determining from the measured current the magnitude of the inverter current.

Abstract: A compound of formal (I) is described: wherein R1 and R2 are as defined in the text and wherein the compounds are intended for use in treating medical conditions characterized by an imbalance in dopamine receptor activity.

Abstract: A method of controlling a brake chopper and a control arrangement, the brake chopper being connected between the positive and the negative rails of an intermediate voltage circuit feeding an inverter bridge, wherein current measurement means are arranged between a DC voltage source and the brake chopper and adapted to measure DC current flowing in the intermediate voltage circuit, which method comprises steps of forming with the inverter bridge an output voltage to a load connected to the output of the inverter bridge, determining a time instant when the DC current of the intermediate circuit is sampled, and preventing the use of the brake chopper at the determined time instant.

Abstract: An arrangement which includes two or more energy storage units for electrical energy connected in series, and two or more balancing resistor units. Each balancing resistor unit is connected in parallel with one of the energy storage units. The arrangement also includes means for determining a voltage over all of the series-connected energy storage units and means for determining the energy storage unit voltages between poles of the energy storage units. One or more of the balancing resistor units include a base resistor unit and a control resistor unit connected in series and a switching device connected in parallel with the control resistor units.

Abstract: A compound of formal (I) is described: wherein R1 and R2 are as defined in the text and wherein the compounds are intended for use in treating medical conditions characterized by an imbalance in dopamine receptor activity.

Abstract: A method and an arrangement of measuring inverter current, where the inverter is connected to and supplied by a DC intermediate circuit having two or more parallel capacitor branches connected between the positive and negative rail of the DC intermediate circuit, and the capacitance of the capacitor branches being known. The method comprises the steps of measuring the current of one of the parallel capacitor branches, and determining from the measured current the magnitude of the inverter current.

Abstract: A method in connection with a frequency converter, which frequency converter comprises output phases and switches of the output phases, the output phases being switched to feed a load, and the main circuit of the frequency converter being provided with common-mode inductance. The method comprises a step where, in case of earth fault, switches of the output phase having an earth fault are modulated in such a way that the average potential of this phase corresponds to the ground potential.

Abstract: The present invention generally relates to the field of treatment of neuronal disorders and more particularly to neurotrophic factor MANF and uses thereof. The present invention provides a pharmaceutical compound comprising MANF nucleic acid molecule, MANF protein or a functional fragment thereof for the treatment of a peripherial neuropathy including Alzheimer's disease, Parkinson's disease, epilepsy, drug addiction and ischemic brain injury.

Abstract: A method of controlling a brake chopper and a control arrangement, the brake chopper being connected between the positive and the negative rails of an intermediate voltage circuit feeding an inverter bridge, wherein current measurement means are arranged between a DC voltage source and the brake chopper and adapted to measure DC current flowing in the intermediate voltage circuit, which method comprises steps of forming with the inverter bridge an output voltage to a load connected to the output of the inverter bridge, determining a time instant when the DC current of the intermediate circuit is sampled, and preventing the use of the brake chopper at the determined time instant.

Abstract: The invention concerns handling in a firewall data communication protocols comprising at least one parent connection and at least one related connection, wherein at least one attribute of the related connection is negotiated within the parent connection. Whether to allow a related connection is decided on the basis of information about the related connection as well as information about the parent connection. The method of the invention comprises allowing a parent connection, storing information about the parent connection, monitoring contents of the parent connection, detecting within the parent connection negotiation of at least one attribute of a related connection, and using said at least one negotiated attribute of the related connection and said information about the parent connection for deciding, whether said related connection is allowable.

Abstract: A method in connection with a frequency converter, which frequency converter comprises output phases and switches of the output phases, the output phases being switched to feed a load, and the main circuit of the frequency converter being provided with common-mode inductance. The method comprises a step where, in case of earth fault, switches of the output phase having an earth fault are modulated in such a way that the average potential of this phase corresponds to the ground potential.