Abb Schweiz Ag

Abb Research Ltd.

Waqas Mahmood Arshad

Ghanshyam Shrestha

Jing Xu

Darren Dale Tremelling

Zhenyuan Wang

Jun Li

Wen Ouyang

Jan Mikael Westerlund

Jiuping Pan

Yu Du

Zhiguo Pan

Jyoti Sastry

Lars Gertmar

Mario Schweizer

Christopher Alan Belcastro

Hongrae Kim

Joseph Carr

Dezheng Wu

Darren Tremeling

Cedric Monnay

Magnus Byggnevi

Jukka Nurmi

In one aspect, a modular static transfer switch is provided. The module static transfer switch includes an output configured to couple to a load, a first input configured to couple to a first power source, and a second input configured to couple to a second power source. The modular static transfer switch further includes a plurality of sold-state switch modules each comprising at least one solid-state switch. A first plurality of the solid-state switch modules are coupled in parallel between the first input and the output, each configured to selectively couple the first power source to the output using the at least one solid-state switch. A second plurality of the solid-state switch modules are coupled in parallel between the second input and the output, each configured to selectively couple the second power source to the output using the at least one solid-state switch.

Modular static transfer switches

The subject matter described herein includes a multiphase fractional slot concentrated winding machine. One such machine includes a machine module including a rotor and a stator. The stator includes a plurality of radially extending teeth. Each tooth is individually wound with a coil. The machine further includes a multiphase series converter circuit physically connected to an end of the machine module to energize the coils for multiphase operation.

Multiphase fractional slot concentrated winding machine with end mounted detachable or integrated multiphase series converter circuit

A synchronous machine and related systems include a stator and rotor separated by an air gap. The rotor includes a rotating DC power supply coupled to exciter windings disposed adjacent the air gap. Power from air gap harmonics, including air gap slot harmonics induce current in the exciter windings, which is rectified and supplied to the rotor field windings. In operation, a desired current level in the rotor field windings can be achieved through control of the DC power supply or superposition of harmonics into the stator winding current which induces the prescribed current in exciter windings.

Systems and methods concerning exciterless synchronous machines

Methods, systems, and computer readable media for managing the distribution of photovoltaic power in a multi-floor building are disclosed. According to one aspect, a method includes determining power requirements for each of a plurality of loads associated with a respective plurality of floors in a multi-floor building, wherein each of the plurality of floors includes a direct current (DC) distribution bus. The method further includes using a PV converter to supply a power output from a PV source to one or more of the plurality of loads via one or more respective DC distribution buses, wherein the power output is supplied to the one or more of the plurality of loads in an order such that each subsequent load is supplied at least a remaining portion of the power output after the power requirements of a previously supplied load is fully satisfied.

Methods, systems, and computer readable media for managing the distribution of power from a photovoltaic source in a multiple-floor building

An electrical machine with a rotor or the stator including a plurality of discrete field modules, and the other one of the rotor and the stator including a plurality of armature coils connected to different power converters. Each field module includes one or more field coils which can be activated independent of the field coils of the neighbouring field modules. When at least one of the field coils is inactivated, e.g. because of a defect, each of the power converters is allowing less power to pass through when an armature coil connected to it is moving over an inactivated field coil, and more power to pass through when the armature coil connected to it is moving over an activated field coil.

Fault-tolerant electrical generator operable with partial power

A hybrid alternating current (AC)/direct current (DC) distribution system for multiple-floor buildings includes per-floor rectifiers for converting supply side AC to DC. Each rectifier is configured to supply a plurality of DC loads associated with one floor of a multiple-floor building. The system further includes per-floor DC busses, each of the DC busses being configured to distribute the DC to the DC loads its respective floor. The system further includes at least one AC bus for supplying AC power to AC loads in the building.

Hybrid alternating current (AC)/direct current (DC) distribution for multiple-floor buildings

A power generation system includes at least one generator having at least two sets of stator windings, an active rectifier comprising power cell based modular converters associated with each set of generator windings. Each set of windings is connected to an AC voltage side of the associated active rectifier, with each active rectifier having a positive DC voltage output and a negative DC voltage output. The DC voltage outputs of active rectifiers are connected to each other in series. A medium voltage DC (MVDC) collection network comprises positive pole cables and negative pole cables, wherein each positive pole cable is connected to the positive DC voltage output of a first active rectifier and each negative pole cable is connected to the negative DC voltage output of a last active rectifier. A substation receives the negative and positive pole cables of the MVDC collection network for further transformation and transmission.

Medium voltage DC collection system

Growing community of inventors

Raleigh, NC, United States of America

Waqas Mahmood Arshad