11results about "Interference suppression" patented technology

A control method and system includes determining a resonant frequency of a vehicle system operably coupled with an external power source providing voltage and current to the vehicle system. A first filter extracts a phase or frequency component from the voltage provided by the external power source to produce a stable voltage component. A second filter extracts a phase or frequency component from the current provided by the external power source to produce a stable current component. The stable voltage component is out of phase with the stable current component. A control input for a converter device of the vehicle system is determined based on the stable voltage component, the stable current component, and the resonant frequency. The stable voltage component, the stable current component, and the control input are communicated with the converter device to change the resonant frequency of the vehicle system.

In a non-contact power supply system, each of a plurality of non-contact power supply devices includes a filter circuit connected to an inverter to convert power supplied from a power source into AC power and including a reactor and capacitors. The non-contact power supply system includes an electrostatic coupler to electrostatically couple one non-contact power supply device to another non-contact power supply device. The electrostatic coupler includes two capacitors electrically connected in parallel, and a different-phase coil between the filter circuit of the one non-contact power supply device and the two capacitors. The different-phase coil includes an inductance component when a short-circuit or a ground fault occurs.

In a non-contact power supply system 110, each of a plurality of non-contact power supply devices 1A, 1B, 1C, 1D, and 1E has a filter circuit 9 connected to an inverter 8 configured to convert power supplied from a power source 2 into AC power, the filter circuit 9 including a reactor and capacitors. The non-contact power supply system 110 includes an electrostatic coupling unit 112 configured to electrostatically couple one non-contact power supply device to another non-contact power supply device, the electrostatic coupling unit 112 having two capacitors C10 and C20 electrically connected in parallel; and a different-phase coil 114 that is provided between the filter circuit 9 of the one non-contact power supply device and the two capacitors C10 and C20, the different-phase coil 114 having an inductance component when a short-circuit or a ground fault occurs.

The invention relates to an electrically operated civil engineering machine and to a method for electrically operating the civil engineering machine, having a mobile carrier device, at least one electrical consumption unit, at least one supply device by means of which electric current is supplied from an external energy source, which supplies electric current in alternating voltage with a first frequency and a first voltage value, the supply device having a first supply unit, which is arranged remote from the mobile carrier device and is connected to the external energy source, and having a second supply unit, which is arranged on the carrier device and is connected to the first supply unit via a connecting line for transmitting electric current. According to the invention, it is provided that the first supply unit has a frequency converter, which converts a frequency of the alternating voltage of the supplied current to a second frequency that is higher than the first frequency, and a first transformer, which increases the alternating voltage to a second voltage value, and that the electric current is transmitted from the first supply unit via the connecting line to the second supply unit on the carrier device with the second frequency and the second voltage.

A wear indicator system may include a switch assembly having a housing, a wear indicator circuit, and an actuator assembly. The housing may connect to a collector shoe assembly having a collector shoe that slides in contact along a conductor bar of a conductor bar assembly, for transferring electrical power between the collector shoe and the conductor bar. The wear indicator circuit may include a communication unit and a switch unit. The actuator assembly may be operably coupled to the housing and to the switch unit and may track along the conductor bar assembly when the collector shoe assembly moves and may contact the conductor bar assembly to depress to a position to activate the switch unit responsive to the collector shoe reaching a designated wear level. The communication unit may communicate a signal indicative of the designated wear level responsive to the switch unit being activated.

Provided in the present disclosure are a regulating method and system adapted to a traction power supply grid. The regulating system is applied to a traction converter system of train. In regulating system, a grid voltage that the traction power grid currently presents is acquired in real time by a grid voltage monitoring module, whether there is high-frequency resonance phenomenon is determined based on the grid voltage that the traction power grid currently presents by a central control module. If there is currently a high-frequency resonance phenomenon, control signals are sent to individual rectifier modules and / or a drive control module to eliminate the high-frequency resonance phenomenon.

A vehicular driving control device comprises: an electric power conversion circuit that is connected to a DC power source and that supplies electric power of the DC power source to an electric motor in accordance with a voltage command; a filter circuit configured to be interposed between the DC power source and the DC side of the electric power conversion circuit and to have a reactor and a capacitor; a variation detection unit for detecting a varying component of the electrical quantity regarding the filter circuit; a torque control unit for generating the voltage command applied to the electric motor in accordance with a torque command or a current command; and a damping control unit for operating the electric power conversion circuit so as to suppress the varying component. The damping control unit operates the electric power conversion circuit in accordance with a damping operation amount based on a first operation amount calculated in accordance with the torque command or the current command and the varying component and a second operation amount calculated in accordance with the varying component and rotation rate information relating to the electric motor. Accordingly, it is possible to provide a vehicular driving control device that performs damping control at a fixed attenuation, regardless of the voltage of DC wires or operating point of the electric motor, with respect to oscillation of capacitor voltage.

To reduce occupied area of a power transmission device in a wireless power transmission system.SOLUTION: A wireless power transmission system comprises: a first power transmission circuit which outputs first power for transmitting power; a second power transmission circuit which outputs second power for transmitting power; three or more power transmission coils for wirelessly transmitting the first power or the second power; a first power reception coil relatively movable to the power transmission coils to wirelessly receive the first power from any of the power transmission coils; a second power reception coil relatively movable to the power transmission coils to wirelessly receive the second power from any of the power transmission coils; and a first switch which connects the power transmission coil facing the first power reception coil among the power transmission coils with the first power transmission circuit and connects the power transmission coil facing the second power reception coil with the second power transmission circuit.SELECTED DRAWING: Figure 1

A wireless power transmission system includes a first power transmission circuit configured to output first power to be transmitted, a second power transmission circuit configured to output second power to be transmitted, a plurality of power transmission coils, a first power reception coil configured to be movable relative to the plurality of power transmission coils and wirelessly receive the first power from one of the power transmission coils, a second power reception coil configured to be movable relative to the plurality of power transmission coils and wirelessly receive the second power from one of the power transmission coils, and a first switch configured to connect a power transmission coil opposed to the first power reception coil among the plurality of power transmission coils to the first power transmission circuit, and connect a power transmission coil opposed to the second power reception coil to the second power transmission circuit.

A wear indicator system may include a switch assembly having a housing, a wear indicator circuit, and an actuator assembly. The housing may connect to a collector shoe assembly having a collector shoe that slides in contact along a conductor bar of a conductor bar assembly, for transferring electrical power between the collector shoe and the conductor bar. The wear indicator circuit may include a communication unit and a switch unit. The actuator assembly may be operably coupled to the housing and to the switch unit and may track along the conductor bar assembly when the collector shoe assembly moves and may contact the conductor bar assembly to depress to a position to activate the switch unit responsive to the collector shoe reaching a designated wear level. The communication unit may communicate a signal indicative of the designated wear level responsive to the switch unit being activated.

A method is presented for detecting a lowering of a current collector of a vehicle, in particular a rail vehicle, from a contact line, the method comprising: determining values of the electric current intensity of an electric current that is transmitted or flows between the contact line and the current collector in a measuring period; determining values of a current component of the electric current with the aid of the values of the electric current intensity; detecting the lowering with the aid of the values of the current component and a predefined criterion. Furthermore, a corresponding apparatus and a vehicle comprising the apparatus are disclosed.