摘要:
The invention relates to a DC/DC converter for use in a decentralized power generation system. If a DC/DC converter is physically separated from a power receiving component and connected to such a power receiving component via a DC bus, a short-circuit on the DC bus may endanger the system and service personnel. In order to minimize such a risk, it is proposed that the DC/DC converter comprises a converting component for DC/DC converting a direct current supplied by a power generating unit and for supplying a resulting converted direct current to a DC bus, and that the DC/DC converter comprises in addition a control component arranged to monitor a voltage at the outputs of the DC/DC converter and to cause the converting component to enter a short-circuit protection mode if the monitored voltage lies below a predetermined voltage threshold. The invention relates equally to a corresponding system and to a corresponding method.
摘要:
Recently, the use of class-D audio amplifiers has become more and more widespread. In contrast to the generally employed class-AB linear amplification technology, class-D allows for improved efficiency. However, the class-D principle is known for its poor distortion characteristics. According to the present invention a digital amplifier (18) is provided for converting an audio signal to a power output, comprising a ripple suppression circuit (16) for suppressing voltage ripples in a supply voltage supplied to die bridge circuit with (6) at least one pair of switches. The ripple suppression circuit (16) suppresses ripples in die supply voltage supplied to a switch in the bridge circuit (6), which has been found to cause a major part of the distortions in the output signal of the digital amplifier (18).
摘要:
A circuit arrangement is described for a microcontroller having an improved energy consumption which is achieved in that the microcontroller (2) is connected to its operating clock only during evaluation of a signal. A switching means (5) through-connecting the operating clock when a “logic 1”, signal is present at the control input is arranged between the microcontroller (2) and the clock generator (6). This “logic 1” signal is generated by setting a flip-flop (4, 7) for example, when receiving a remote control signal. The program run of the microcontroller (2) is stopped at a defined breakpoint so that there is no transient time.
摘要:
The present invention relates to an arrangement including a plasma display screen (3). In such an arrangement having cells for the generation of pixels between a transparent front plate (10) facing the viewer and a rear wall (11) and having electrical contacts for contacting the cells in the areas (13) of opposite outer edges of the rear wall (11), which contacts are connected to electronic circuits (4, 6, 7), arranged on the outer side of the rear wall (11) remote from the cells, by way of current supply leads (2) which extend substantially parallel, in such a manner that the current supply leads (2) end, electrically isolated, in a narrow contact area (14), where electrical contact is established between the current supply leads (2), on the one hand, and the electrical circuits (4, 6, 7), on the other hand.
摘要:
A lighting system and a method for a operating a lighting system, enabling to obtain an identification tag (7) comprised in lighting design data (5) directly from an output beam (3), i.e. from the emitted light of the at least one lighting unit (2). It is thus possible to trace any unauthorized distribution of a lighting design by monitoring the emitted light without the need to directly access the controller or any other part of the lighting system.
摘要:
The present invention relates to a bidirectional semiconductor switch (M1, M2) with extremely low control power consumption and a bootstrap circuit which allows reliable start of operation of the switch and the hosting device after unlimited duration of mains interruptions. Intelligent control options are provided by operating from a small energy storage and no extra means are required to recover from a depleted energy storage condition. The absence of audible noise and mechanical wear also enables more frequent recharging cycles and allows smaller and thus cheaper energy storage components.
摘要:
Disclosed is a lighting device including a circuit including at least two parallel-connected light-emitting diodes of opposite pole in a first parallel branch and comprising at least two parallel-connected light-emitting diodes of opposite pole in a second parallel branch, and also including a capacitor and a coil. At least one of the diodes emits red light, blue light, and/or white light.
摘要:
The invention relates to a method for controlling the luminous flux of a lighting arrangement (3) for illuminating the interior of a building (5), wherein the lighting arrangement (3) comprises at least one artificial lighting device (17), which artificial lighting device (17) is supplied with electrical power by a power source system (9) comprising a first power source (11) being a photovoltaic device (13) for generating electrical power and an access to at least one second power source (15), the method comprising the steps of: —pre-selecting a luminous flux characteristic curve (47, 49), which specifies a monotonically increasing dependence of the luminous flux of the artificial lighting device (17) on the light intensity outside the building (5); —Determining the light intensity outside the building (5); and Supplying the at least one artificial lighting device (17) with the electrical power required for generating the luminous flux according to said selected luminous flux characteristic curve (47, 49), wherein the photovoltaic device (13) has a power contribution to said amount of required electrical power. The invention further relates to a corresponding photovoltaic lighting system (1) and a data storage device encoding a program to perform the method.
摘要:
The invention relates to controlling the access to a networked control system such as a lighting control system or a home control system. According to an embodiment of the invention, a system for controlling the access to a networked control system (10), wherein devices (121-124) of the networked control system are connected to the same network (14) and are assigned to the same delimited space (16, 18), a transmitter device (20, 22) transmits access information for the devices within the delimited space over a range restricted transmission channel (24, 28) differing from the transmission channel(s) of the networked control system and in a manner that substantially limits the reception of the access information to the delimited space, wherein the access information comprises an access identifier for obtaining access for controlling one or more of the devices in the delimited space, and a receiver device (26) receives the transmitted access information and controls a device assigned to the delimited space over the network (14) by using the access identifier contained in the received access information.