Hong Kong Applied Science and Technology Research Institute Company, Limited

Astec International Limited

Aes Global Holdings Pte Ltd.

Lei Shi

Ming Huei Lu

Chak Hau Pang

Kim Ly Kha

Kai Chiu Wu

Chak Hau Charles Pang

Yuk Man Shing

Lai Man Chau

Siu Lun Wu

Kandor Sze Ngok Pong

Kai Chiu Adam Wu

A three-phase magnetics assembly comprising a plurality of windings, and a unified core body is provided. The core body includes core legs which extend along central axes of the plurality of windings and around which the plurality of windings are wound such that magnetic fluxes are produced in the plurality of core legs when current flows through the plurality of windings. The plurality of windings comprise first, second, and third phase inductors, and first, second, and third phase transformers, which are positioned about the unified core body such that the core legs of the first phase inductor and second phase transformer share a central axis, the core legs of the second phase inductor and third phase transformer share a central axis, and the core legs of the third phase inductor and first phase transformer share a central axis.

Three-phase magnetics assembly

A controller of a power converter is coupled to a switch assembly and configured to perform a hold-up time procedure that causes the controller to control first and second switching elements into opposite conducting states during a first period of time of a pulse cycle and into alternate opposite conducting states during a second period of time of the pulse cycle. The hold-up time procedure also causes the controller to control a first pair of synchronous rectifier switching devices into a conducting state during a third period of time overlapping less than all of the first period of time and into the conducting state during a fourth period of time overlapping less than all of the second period of time. A second pair of synchronous rectifier switching devices is controlled into a non-conducting state during the first and second periods of time.

Holdup time extension for LLC circuit

According to some aspects of the present disclosure, automatic transfer switch circuits and control methods are disclosed. Example automatic transfer switch circuits include a first voltage input having a line terminal and a neutral terminal, a second voltage input having a line terminal and a neutral terminal, a voltage output having a line output terminal and a neutral output terminal, a first relay coupled to the line terminal of the first voltage input and the line terminal of the second voltage input, a second relay coupled to the neutral terminal of the first voltage input and the neutral terminal of the second voltage input, a third relay coupled between the line output terminal and at least one of the first relay and second relay, a fourth relay coupled between the neutral output terminal and at least one of the first relay and the second relay, and a controller.

Automatic transfer switch circuits and control methods

A assembly includes at least a first and a second light emitting source for emission of light, and an air passage between the first and second light emitting sources to allow air flow therethrough for dissipation of heats generated by the light emitting sources.

Light emitting assembly with heat dissipation structure

A heat-dissipating reflector for a lighting device having a reflecting surface for reflecting light from a light emitting source of the lighting device, and a plurality of ventilation openings formed through the reflecting surface for dissipating heat generated by the light emitting source.

Heat-dissipating reflector for lighting device

A light-emitting assembly comprising a lens, a first optical source, a second optical source and a third optical source, wherein the lens is disposed forward of said first, second and third optical sources; the third optical source is intermediate the first and second optical sources; and the lens and the first, second and third optical sources are arranged so that light emitted from the first and second optical sources merges at the third optical source after undergoing internal reflection at the lens.

Growing community of inventors

Hong Kong, China

Lei Shi