摘要:
Apparatus and methods for regulating delivery of electrical energy to a lighting load are disclosed. An electrical waveform is received from a source of electrical energy. An integration value is generated based on a square of an amplitude of the received waveform. Electrical energy is delivered to the load until the integration value exceeds a threshold value. Thereafter, the delivery of electrical energy to the load is discontinued.
摘要:
A load control circuit (36) having an overload circuit capable of protecting a switching element (26) from overload conditions over a wide range of operating conditions. The overload circuit limits the maximum average power dissipation of the switching element (26) in accordance with a comparison of an average voltage across the switching element over a half-cycle and a variable threshold. The variable threshold is determined based on an ON-state resistance of the switching element (26) and the environment in which the switching elements are operating. The variable threshold accounts for the squared term (V or I ) in determining power dissipation and allows power to be determined based on average voltage.
摘要:
A lighting control device (10) for controlling electric power applied to a lamp (20) to control the lamp intensity. Such device comprises (i) a control switch (T) having a manually-manipulatable switch actuator (16) for controlling the closure of the switch; (ii) intensity-selecting means (R, L) for producing control signals representative of a desired increase or decrease in the lamp intensity, and (iii) a control unit (28), operatively coupled to said control switch and said intensity-selecting means, for causing the lamp intensity to fade from one steady-state level to another at a predetermined fade rate. According to a preferred embodiment, the intensity-selecting means (R, L) is independent of said control switch (T), and the control unit (28) is responsive to different types of switch closures of said control switch (T) to cause the power applied to the lamp to change level at different rates. According to another aspect of the invention, the control unit (28) is responsive to the intensity-selecting means (R, L) to store a preselected intensity level to which the lamp intensity will fade from a previous OFF condition in response to a closure of control switch (T), and indicator means (18) are provided for visually indicating said preselected intensity level.
摘要:
Dispositif de commande d'éclairage (10) servant à réguler la puissance électrique alimentant une lampe (20) pour en réguler l'intensité. Un tel dispositif comprend (i) un interrupteur de commande (T) comprenant un actionneur (16) d'interrupteur manuel servant à commander la fermeture de l'interrupteur; (ii) des moyens de selection d'intensité (R, L) servant à produire des signaux de commande représentant une augmentation ou une réduction requises de l'intensité de la lampe, et (iii) un organe de commande (28) accouplé de manière fonctionnelle audit interrupteur de commande et auxdits moyens de sélection d'intensité afin de réduire progressivement l'intensité de la lampe d'un niveau à régime permanent à un autre, à une vitesse prédéterminée. Selon un mode préféré de réalisation, les moyens de sélection d'intensité (R, L) sont indépendants dudit interrupteur de commande (T), et l'organe de commande (28) est sensible à différents types de fermetures dudit interrupteur de commande (T) afin que le courant appliqué à la lampe puisse changer de niveau à différentes vitesses. Selon un autre aspect de l'invention, l'organe de commande (28) est sensible aux moyens de sélection d'intensité (R, L) pour mémoriser un niveau d'intensité présélectionné que va atteindre progressivement l'intensité de la lumière à partir d'un état d'ARRET précédant en réponse à la fermeture de l'interrupteur de commande (T), et des élémenmts indicateurs (18) sont prévus pour indiquer visuellement ledit niveau d'intensité préselectionné.
摘要:
Apparatus for controlling at least one electrical device (54) by remote control includes at least one control device (50) coupled to the electrical device (54) by a power line connection, the control device (50) having a switch (58, 59) for adjusting the status of the electrical device (54). The control device (50) has a radio frequency (RF) transmitter/receiver for adjusting and communicating the status of the electrical device. A master control unit (20) is provided having at least one actuator and status indicator (22). The master unit (20) has a transmitter/receiver for transmitting RF information to control the status of the electrical device and for receiving the status information from the control device (50). The master control unit (20) indicates status of the electrical device(54). A repeater transmitter/receiver (40) is provided for receiving the RF signal from the master unit (20) and transmitting control information to the control device (50) and for receiving the status information.
摘要:
A load control device may control the amount of power provided to an electrical load utilizing a phase control signal that operates in a reverse phase control mode, a center phase control mode, and a forward phase control mode. A load control device may be configured to determine that the electrical load should be operated via a phase control signal operating in a forward phase-control mode. After determining to operate the electrical load via the phase control signal in the forward phase-control mode, the load control device may provide the phase control signal in a reverse phase-control mode for a predetermined period of time to the electrical load, for example, to charge a bus capacitor of the electrical load. Subsequently, the load control device may be configured to switch the phase control signal to the forward phase-control mode and provide the phase control signal in the forward phase-control mode to the electrical load.
摘要:
An elongated reelable shade, first and second spaced support brackets removably connected to first and second and opposite ends of said elongated reelable shade for supporting said reelable shade from a fixed support, an electrical drive motor having an output shaft for rotating said elongated reelable shade around its axis to selectively reel and unreel said shade, an electrical circuit for energizing and operating said motor, the electrical circuit including a controller coupled to and controlling the operation of said drive motor, and a coupler for removably coupling said output shaft of said motor to said first end of said elongated reelable shade, a single housing having said first bracket fixed thereto, said single housing containing and supporting said motor, said electrical circuit and said coupler, said coupler comprising an output driver which removably receives said first end of said shade with rotatable driving relationship.
摘要:
A load control circuit (36) having an overload circuit capable of protecting a switching element (26) from overload conditions over a wide range of operating conditions. The overload circuit limits the maximum average power dissipation of the switching element (26) in accordance with a comparison of an average voltage across the switching element over a half-cycle and a variable threshold. The variable threshold is determined based on an ON-state resistance of the switching element (26) and the environment in which the switching elements are operating. The variable threshold accounts for the squared term (V2 or I2) in determining power dissipation and allows power to be determined based on average voltage.
摘要:
An elongated reelable shade, first and second spaced support brackets removably connected to first and second and opposite ends of said elongated reelable shade for supporting said reelable shade from a fixed support, an electrical drive motor having an output shaft for rotating said elongated reelable shade around its axis to selectively reel and unreel said shade, an electrical circuit for energizing and operating said motor, the electrical circuit including a controller coupled to and controlling the operation of said drive motor, and a coupler for removably coupling said output shaft of said motor to said first end of said elongated reelable shade, a single housing having said first bracket fixed thereto, said single housing containing and supporting said motor, said electrical circuit and said coupler, said coupler comprising an output driver which removably receives said first end of said shade with rotatable driving relationship.