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:
The invention relates to a decentralized power generation system comprising a plurality of decentralized power generating units (11,12;13,14). In order to enable an optimized control of these power generating units while enabling at the same time a high security in the system, it is proposed that the system further comprises a plurality of DC/DC converters (31,32), each connected to another one of the power generating units for converting a current provided by the power generating units. The proposed system moreover comprises a DC bus (40) to which the DC/DC converters feed a respectively converted current. The proposed system moreover comprises at least one power receiving component (20) retrieving current from the DC bus, which power receiving component is physically separated from the DC/DC converters. The invention relates equally to a corresponding method.
摘要:
The invention relates to a resonant power LED control circuit for the independent, simultaneous brightness and color or color temperature control of two LEDs (41, 42) or two groups of LEDs, comprising a single resonant converter which is essentially formed from a half or full bridge DC/AC converter (2) with a control unit (21), a resonant capacitor, and a transformer (3).
摘要:
The invention relates to an electronic circuit for igniting a high-pressure lamp. A resonant circuit 13 of the circuit is used to supply the ignition voltage for the high-pressure lamp. To enable an exact adjustment of the resonance frequency in the resonant circuit, it is proposed that the circuit also comprises converter 12 for generating an alternating voltage with which the resonant circuit 13 is excited and an oscillator 14, 16, 17 for driving the converter 12, the fundamental frequency of the output voltage of the oscillator being at least in proximity to an integral fraction of the resonance frequency of the resonant circuit 13. Finally, it is proposed that the circuit includes a feedback 17 from the resonant circuit 13 to the oscillator 14, 16, 17, whereby the fundamental frequency of the output voltage of the oscillator is so tuned that the resulting frequency of the output voltage of the oscillator corresponds substantially exactly to the integral fraction of the resonance frequency. The invention also relates to a corresponding lighting installation and a corresponding method.
摘要:
An axial flux induction motor has a stator and a disc-shaped rotor facing the stator with an air gap there-between. The rotor disc includes a first material of relatively high magnetic permeability and a second material of relatively high electrical conductivity, the first material being of higher specific gravity than the second material. The first material is in the form of an annular ring imbedded in or supported on one surface of the disc, opposite the surface thereof which faces the stator. The outer radius R.sub.1 of the annular ring and the outer radius R.sub.2 of the disc are related so that 1.2 R.sub.1
摘要:
A single-phase reluctance motor is constructed so that either the rotor or the stator (or both) has poles in which there are areas of different saturation induction (thereby forming an asymmetric saturation characteristic in these poles), as a result of which an aligned position of the movable member becomes non-aligned at increasing excitation current and the movable member begins to move in a predetermined direction.
摘要:
The quality of a particular physical or chemical parameter which exists at the cells of a multicell battery, such as for example, the voltage, current or temperature parameter at each cell, is continually monitored by a circuit arrangement which includes a separate measuring circuit for each cell. Each measuring circuit receives at its input, a signal representative of the value of the quality of a particular parameter, and produces at its output an electrical signal the length of which is proportional to the value of the signal at its input. The outputs of the measuring circuits are connected to a measuring analyzer circuit containing a controller which generates a starting signal that is applied to the measuring circuits to enable or actuate them one after the other, so that the outputs of the measuring circuits are in turn successively applied to the input of the analyzer circuit, which includes a display that provides an indication of the quality of the parameters which are being monitored.