Abb Schweiz Ag

Alstom Technology Limited

Eaton Intelligent Power Limited

Martin Veenstra

Toufann Chaudhuri

Peter Karl Steimer

Stephane Isler

Alfred Rufer

Yann Cuenin

Blaise Thorens

The invention concerns an electrical vehicle charging station for at least one electric vehicle in a network including at least a house, energy producers, and energy consumers.

Electrical vehicle charging station with power management

A transformer which includes an enclosure with a first and second cover arranged at opposite ends of the enclosure, the enclosure having an enclosed volume filled with isolation material and including at least one channel which extends through the enclosure from the first cover to the second cover. The interior of each channel is separated from the enclosed volume, and the core is provided outside of the enclosed volume and comprises a leg and a yoke. The leg extends through the channel. The transformer further includes a coil inside the enclosed volume and being wound about the channel. The first and second cover each comprise an electrically insulating material and at least one electrically conductive component.

Traction transformer

A method for the control of a static frequency converter, in which an alternating voltage provided by a generator with a first frequency is first rectified in a switched rectifier, and in which the DC-voltage thus present in an intermediate circuit is inverted to an alternating voltage with a grid frequency by means of a switched inverter. The generator is provided with an excitation coil and with means for controlling the power made available to the grid by means of controlling the strength of the excitation field provided by the excitation coil and, if need be, also of the phase relationship between the voltage of the frequency converter and the generator voltage and the grid voltage, respectively. The generator side alternating voltage of the rectifier is controlled to a frequency which is substantially constant in accordance with the first frequency and the inverter is controlled on the basis of the measured value of the DC-voltage in the intermediate circuit.

Method to control a frequency converter

The present invention relates to a method and to a device for adapting the alternating current generated by a generator () and the alternating voltage generated by a generator () to a grid (), whereby the generator () has at least one excitation coil (). The power fed into the grid () can be flexibly adapted while entailing low switching losses in that a static frequency converter () is employed for the adaptation between the generator () and the grid (), and in that, in order to control the power fed into the grid (), means () are provided with which, on the one hand, the strength of the excitation field generated by the at least one excitation coil () is regulated and, on the other hand, the phase angle between the frequency converter voltage and the generator or grid voltage is appropriately controlled.

Frequency converter for high-speed generators

A circuit for transmitting real power from a DC voltage side to AC voltage-side connections has a first power converter ( ) with load connections ( ) connected in series with second power converters ( ) having a lower intermediate-circuit capacitor voltage. This allows finer voltage graduation of a sum voltage at the AC voltage-side connections ( ). Voltages of intermediate-circuit capacitances of power converters ( ) and a common-mode voltage of the AC voltage-side connections can be jointly regulated. The intermediate-circuit capacitor voltages can be kept essentially constant. The second power converters ( ) can interchange real power with a load ( ) and the first power converter ( ). Changes in the intermediate-circuit capacitor voltages can be calculated in advance using a model of the converter. The common-mode voltage can be selected to minimize a weighted sum of the squares of the errors between the intermediate-circuit capacitor voltages and the respective nominal values.

Growing community of inventors

Lausanne, Switzerland

Martin Veenstra