Abstract:
An occupancy sensing and energy indicating load control device includes an occupancy sensor, an energy savings feedback indicator, and a manual controller. The occupancy sensor detects occupancy within a monitored area. The device is electrically coupled to at least one load positioned within the monitored area and controls the energy consumption of the load. The energy savings feedback indicator provides awareness to an end user regarding energy savings and provides the end user with opportunities for additional energy savings. The device optionally includes a demand response indicator for providing awareness to the end user regarding when a demand response condition exists, its severity, and opportunities for additional energy savings.
Abstract:
A lighting fixture that includes a frame, a heat sink assembly, an LED assembly, and a reflector. The frame includes a first end plate and a second end plate, each end plate including a slot formed therein. The slot extends from a top edge of the end plates towards a bottom edge of the end plates. The heat sink assembly includes one or more LEDs and a lightguide having a first longitudinal edge that receives light emitted from the LEDs. A first edge and a second edge of the lightguide are slidably inserted respective slots. The heat sink assembly includes a heat sink base and a heat sink cap coupled thereto which forms a first cavity for housing the LEDs and a second cavity adjacent the first cavity for housing a portion of the lightguide. The reflector is coupled to the end plates.
Abstract:
A single common load is provided for both space heating of the interior of an enclosure and for testing of a back-up battery therewith. The common load is coupled to either the battery for momentary load testing thereof, or to a power supply when heat is to be generated by the load for space heating of an interior of an enclosure. Providing only a single load for both space heating and battery testing results in reduced component costs, space savings and simplification of connections and wiring harnesses required. Power resistors, active components such as transistors or MOSFETs, and/or resistive heat tracing may be used as the common load, and deposed within the interior of the enclosure.
Abstract:
An electrical connector having a reduced temperature rise system is described herein. The electrical connector can include a conductor receiver and a conductor mechanically coupled to the conductor receiver. The conductor can include a pin having electrically conductive material and an exposed end. The conductor can also include at least one compression member disposed along a portion of the outer perimeter of the pin at a first distance from the exposed end. When the conductor is coupled to the conductor receiver, the compression member contacts the wall of the conductor receiver to the pin. Alternatively, the conductor receiver can have an electrically conductive first portion and a second portion. Further, the conductor can have a conductive pin and a guide pin. The guide pin can force the first portion to expand and compress around the conductive pin as the conductor is mechanically coupled to the conductor receiver.
Abstract:
An apparatus for generating an isolated power supply voltage and an isolated data signal includes a first pulse generation circuit configured to generate a first pulse signal and a second pulse generation circuit configured to generate a second pulse signal based on an input pulse width modulation (PWM) signal. A transformer circuit including a transformer is coupled to the first pulse generation circuit and to the second pulse generation circuit. The transformer is configured to generate an output pulse signal based on the first pulse signal and the second pulse signal. An isolated power supply circuit is coupled to the transformer circuit and is configured to generate an isolated power supply voltage based on the output pulse signal. A latch circuit is coupled to the transformer circuit and is configured to generate an isolated PWM signal based on the output pulse signal.
Abstract:
A retention structure for retaining a recessed lighting fixture behind a ceiling includes an attachment structure that has a first wall and a second wall. The attachment structure is designed to be attached to a housing of a recessed light fixture. The retention structure further includes a screw attached to the first wall of the attachment structure and to the second wall of the attachment structure. The retention structure also includes a pawl attached to the threaded screw. The pawl is rotatable along with the threaded screw. The pawl is also axially movable along the threaded screw between the first wall of the attachment structure and the second wall of the attachment structure.
Abstract:
An edge-lit light emitting diode (LED) light panel includes a frame that has a first plate, a second plate, and a channel partially bounded by the first plate and the second plate. The edge-lit LED light panel also includes a plurality of light emitting diodes (LEDs) disposed in the channel, and a wave guide disposed within the frame. The wave guide has an outer perimeter edge abutting the plurality of LEDs.
Abstract:
A lighting system includes an array of domed light emitting diodes covering a surface area of a substrate and two optics for processing emitted light. The first optic includes an inner surface facing the array and an exterior surface facing away from the array. The second optic includes grooves extending away from the array. The inner surface of the first optic can form a cavity that is large relative to the array. For example, the cavity can have a volume exceeding the volume of a cube, where each side of the cube has the surface area of the array.
Abstract:
A method for controlling a buck converter of an alternating current (AC)-powered light emitting diode (LED) circuit. The method includes receiving an input voltage, and converting the input voltage to a feedback voltage. The method can also include sending the feedback voltage to the buck converter. The feedback voltage is proportional to the input voltage by a first factor when the input voltage is less than an upper threshold voltage and greater than a lower threshold voltage. The feedback voltage is proportional to the input voltage by a second factor when the input voltage is at least as great as the upper threshold voltage. The upper threshold voltage is less than a maximum voltage of the input voltage.
Abstract:
An electrochemical energy storage device includes a housing, at least one energy storage element in the housing and operable with an electrolyte, a cap coupled to the housing, at least one electrolyte impregnation hole formed in the cap, and a first terminal lug attachable to the cap via the electrolyte impregnation hole.