Patent
Power transformer and power converter incorporating same
Lixiang Wei,Gary L. Skibinski +1 more
TLDR
In this paper, an autotransformer with 15 inductors coupled in series, joined by 15 nodes interposed between pairs of the inductors, is represented as a hexagon in which alternating sides of the hexagon have two and three inductors.Abstract:
Embodiments of the present invention provide novel techniques for using multiple 18-pulse rectifier circuits in parallel. In particular, each rectifier circuit may include an autotransformer having 15 inductors coupled in series, joined by 15 nodes interposed between pairs of the inductors. The inductors may be represented as a hexagon in which alternating sides of the hexagon have two and three inductors, respectively. Each rectifier circuit may also include three inputs for three-phase AC power coupled to alternating vertices of the hexagonal representation and nine outputs for AC power coupled between each node that is not a vertex of the hexagonal representation and a respective diode bridge. Outputs of the diode bridges for the rectifier circuits may be coupled to a DC bus. In addition, a means for reducing circulating current between the parallel rectifier circuits and for promoting load sharing between the parallel rectifier circuits is also provided.read more
Citations
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Patent
Ac/dc power conversion system and method of manufacture of same
Kaz Furmanczyk,Randy Stephenson +1 more
TL;DR: In this paper, a power converter has a transformer having three primary windings configured to receive respective phases of a three-phase alternating current (AC) input signal in a delta configuration and three secondary windings, each split into two portions, wherein the portions are coupled together in a regular hexagon.
Patent
Apparatus and method for energy efficient motor drive standby operation
TL;DR: In this article, a standby controller uses at least one switching device to power an inverter in a normal mode and to remove power from the inverter and other motor drive components during a standby mode for improved energy efficiency.
Patent
Dynamic maneuvering configuration for multiple control modes in a unified servo system
Cuon Lam,Sovann Song,Khoa Nguyen +2 more
TL;DR: In this paper, a control circuit with multiple sub-control inputs that control operation of a power electronics device (e.g., a power converter) is described, where outputs of each sub-controller are coupled to the common control node by a respective switch.
Patent
Multifunction power converter with option for integrated magnetics
TL;DR: In this paper, power converter modules and parallel conversion systems are presented in which the modules are provided in a rollable enclosure having AC and DC electrical connections, and an interior including a switching circuit with switching devices individually connected between a corresponding AC node and a corresponding DC node for operation as either a rectifier or an inverter, with a built-in blower or fan to cool the filter circuit during operation.
Patent
Dynamic sharing average current mode control for active-reset and self-driven synchronous rectification for power converters
TL;DR: In this paper, a circuit for providing dynamic output current sharing using average current mode control for active reset and self-driven synchronous rectification with pre-bias startup and redundancy capabilities for power converters is presented.
References
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Patent
Nine-phase transformer
TL;DR: In this article, an autotransformer for converting three-phase AC power to nine-phase power is described. But the transformer gain is not specified. But it is assumed that the output voltage is equal to or equal to that of the input voltage.
Patent
Auto-connected hexagon transformer for a 12-pulse converter
TL;DR: In this article, a 12-pulse converter of lower rating and minimal current harmonics was obtained with an auto-connected regular hexagon transformer including a delta winding in its center.
Patent
Twelve-phase transformer configuration
TL;DR: In this article, an autotransformer for converting three-phase AC power to twelve-phase DC power using only three coils is presented, each coil including a plurality of serial windings that together form a polygon.
Proceedings ArticleDOI
Cost effective multi-pulse transformer solutions for harmonic mitigation in AC drives
TL;DR: In this article, the authors proposed nine and twelve-phase auto-transformers can be viewed as a polygon winding type, where besides achieving an improved input current harmonics, junction points among various windings along the polygon can be wired out for stepdown, unity and step-up voltage transfers.
Patent
Cross current control for power converter system
TL;DR: In this article, a system and method for controlling cross current in an interleaved power converter system having a plurality of converter threads coupled in parallel is presented, which collects a feedback current from each thread and obtaining a normal current and a differential mode current for each thread, based on its respective feedback current.