Patent application number | Description | Published |
20120170259 | FLAT TUBULARLAMP - A flat fluorescent lamp which includes: a long rectangular shaped light guiding panel, a light-emitting module, a light guiding body, a reflective layer, and at least one light-emitting diode. The light guiding body seamlessly connects between an end surface of the light guiding panel and the light-emitting module. The reflective layer is located exterior of the light guiding panel. A Coupling head is installed on the side of the light-emitting module that is away from the light guiding panel, and the coupling head is connected to the light-emitting module. Thereby, an energy efficient fluorescent lamp that can be thinner and installed on general lamp socket is provided. | 07-05-2012 |
20120236597 | LAMP AND FRAME MODULE THEREOF - A frame module includes a frame strip, a light emitting diode (LED) bar, and a fastener. The frame strip has a heat-dissipating portion, two elastic arms extended in one direction from the two edges of the heat-dissipating portion, and two pressing portions inwardly protruded form the two elastic arms. The heat-dissipating portion, the two elastic arms, and the two pressing portions define an accommodating trough. The LED bar has a printed circuit board (PCB) and a plurality of LEDs mounted on the PCB. The PCB is arranged in the accommodating trough of the frame strip and clamped between the heat-dissipating portion and the two pressing portions. The fastener is fixed on the two elastic arms. Thus, the heat generated form the LED bar is conducted by the LED bar directly contacting the frame strip. Besides, the instant disclosure also provides a lamp. | 09-20-2012 |
20130107529 | LIGHT FIXTURE AND LIGHTING DEVICE USING THE SAME | 05-02-2013 |
20130107570 | LED LAMP | 05-02-2013 |
20130250543 | LIGHTING DEVICE - The instant disclosure relates to a lighting device, which includes a lighting module, a reflector, a light-guiding member, a main body, and a cover. The lighting module includes a base plate and a plurality of light-emitting units mounted on the base plate. The reflector has at least one reflective surface proximate to the base plate. The cross-section of the reflector gradually decreases in a direction toward the base. The light-guiding member is disposed between the lighting module and the reflector. The light-guiding member has a polarizing portion for reflecting light emitted from the light-emitting units. The base plate is disposed on one end of the main body. The cover is selectively disposed on the main body. Thus, an omni-directional lighting device is presented. | 09-26-2013 |
20130322069 | LAMP STRUCTURE - A lamp structure includes a lamp housing, a light-guiding module, a light source module, and a fastening piece. The lamp housing includes a bottom wall and an annular side wall, where the side wall connects to the bottom wall to define a receiving space. The bottom wall has a positioning portion. The light-guiding module is disposed in the receiving space surrounded by the light source module. The light source module includes a circuit board and a plurality of light source units. The circuit board includes a projection portion engaging with the positioning portion. The fastening piece includes a fastening portion releasably attached to the lamp housing to provide structural stability. | 12-05-2013 |
Patent application number | Description | Published |
20080205096 | CONTROL SYSTEM AND METHOD FOR A UNIVERSAL POWER CONDITIONING SYSTEM - A new current loop control system method is proposed for a single-phase grid-tie power conditioning system that can be used under a standalone or a grid-tie mode. This type of inverter utilizes an inductor-capacitor-inductor (LCL) filter as the interface in between inverter and the utility grid. The first set of inductor-capacitor (LC) can be used in the standalone mode, and the complete LCL can be used for the grid-tie mode. A new admittance compensation technique is proposed for the controller design to avoid low stability margin while maintaining sufficient gain at the fundamental frequency. The proposed current loop controller system and admittance compensation technique have been simulated and tested. Simulation results indicate that without the admittance path compensation, the current loop controller output duty cycle is largely offset by an undesired admittance path. At the initial simulation cycle, the power flow may be erratically fed back to the inverter causing catastrophic failure. With admittance path compensation, the output power shows a steady-state offset that matches the design value. Experimental results show that the inverter is capable of both a standalone and a grid-tie connection mode using the LCL filter configuration. | 08-28-2008 |
20100073969 | PHOTOVOLTAIC INTEGRATED VARIABLE FREQUENCY DRIVE - A photovoltaic (PV) integrated variable frequency drive system having a variable frequency drive and an energy source. The variable frequency drive having a back end inverter, a DC bus electrically connected to the back end inverter, and an active front end electrically connected to the DC bus to facilitate bi-directional power flow to and from a power grid. The energy source being electrically connected to the DC bus. | 03-25-2010 |
20110057716 | Circuit of Reducing Power Loss of Switching Device - A circuit is provided to reduce power loss on switching. A pair of auxiliary switching devices is switched on before a pair of switching devices. The switching devices are switched on after a corresponding capacitor to the auxiliary switching devices is discharged to zero. Thus, the power loss of the switching devices is reduced. | 03-10-2011 |
20110273917 | INTELLIGENT PHOTOVOLTAIC INTERFACE AND SYSTEM - The present invention relates to a photo-voltaic interface for integration of photo-voltaic modules in a power system. The photo-voltaic interface includes a power conversion system adapted to convert power to a pre-determined voltage and current type, a control and monitoring system adapted to allow monitoring and control of power flow to optimize grid operation, and a communications system adapted to allow remote monitoring of the photo-voltaic interface to detect defective components. | 11-10-2011 |
20120057387 | HYBRID SWITCH FOR RESONANT POWER CONVERTERS - A hybrid switch comprising two semiconductor switches connected in parallel but having different voltage drop characteristics as a function of current facilitates attainment of zero voltage switching and reduces conduction losses to complement reduction of switching losses achieved through zero voltage switching in power converters such as high-current inverters. | 03-08-2012 |
20130134935 | MEDIUM VOLTAGE STAND ALONE DC FAST CHARGER - An apparatus for DC fast charging of an electric vehicle includes an active front end AC-DC converter and an isolated DC-DC converter. The active front end AC-DC converter is adapted to rectify a medium voltage alternating current (AC) from a utility grid to a high voltage direct current (DC). The isolated DC-DC converter is adapted to transform the high voltage DC to a low voltage DC for charging the electric vehicle. | 05-30-2013 |
20150162845 | DC-DC POWER CONVERSION APPARATUS AND METHOD - A DC-DC power conversion apparatus and a DC-DC power conversion method are provided. The DC-DC power conversion apparatus includes a switching circuit, a main transformer circuit, a main rectifier circuit, an auxiliary transformer circuit and an auxiliary rectifier circuit. The switching circuit provides an input power to a primary winding of the main transformer circuit or a primary winding of the auxiliary transformer circuit by time-division. An AC input terminal of the main rectifier circuit is coupled to a secondary winding of the main transformer circuit. An AC input terminal of the auxiliary rectifier circuit is coupled to a secondary winding of the auxiliary transformer circuit. A power output terminal of the auxiliary rectifier circuit is coupled to a reference voltage terminal of the main rectifier circuit for lifting a voltage of the power output terminal of the main rectifier circuit. | 06-11-2015 |
20150183330 | MODULAR RECONFIGURABLE MEDIUM VOLTAGE TRANSFORMER FOR DATA CENTERS, VOLT/VAR CONTROL, AC AND DC CHARGING, AND VEHICLE-TO-GRID APPLICATIONS - A modular reconfigurable medium voltage transformer configured for data centers, VOLT/VAR control, AC and DC charging, and vehicle-to-grid applications is disclosed. The modular reconfigurable transformer includes a plurality of modules configured to be connected to or disconnected from each other to provide multiple transformer configurations. Each of the modules are configured for bi-directional or uni-directional power flow to allow the transformer to provide power from a power source to an application or from the application back to the power source | 07-02-2015 |