Patent
Ac power converter
Murray Mason,Qunying Yao +1 more
TLDR
In this article, a power converter suitable for use in lighting dimmer control is described, and a number of aspects of the power converter are disclosed, such as the problem of freewheeling, the linearity of the circuit transfer characteristic, and the amplitude of a spike.Abstract:
The present invention relates to apparatus used in power control, such as apparatus for controlling the power level in an AC electrical circuit. Such an apparatus is referred to as an AC power converter. In one form, the present invention particularly relates to a power converter suitable for use in lighting dimmer control although other applications of the present invention are not to be excluded from the scope of the present application. A number of aspects of the power converter are disclosed. One aspect is directed to the problem of freewheeling in a power converter. In another aspect the linearity of the circuit transfer characteristic is improved when operating in response to small load outputs. A further aspect relates to surge detection by controlling the pulse width and accordingly, the amplitude of a spike. In a still further aspect, communication between a number of power converters uses a network such as ethernet, or preferably LONTM.read more
Citations
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References
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Patent
Method and apparatus for electronic power control
TL;DR: In this paper, a method of electronic power control by varying the amplitude of an electrical power supply voltage, independent of frequency, whereby the output frequency will always be the same as the input frequency was described.
Patent
Power converting apparatus
TL;DR: In this article, the smoothing capacitor is connected via a rectifier diode and a short-circuiting switch is set to an ON state only in each of shortcircuit ranges of which midpoint matches each of zero-crossing phases.
Patent
Electronic ballast having a triac dimming filter with preconditioner offset control
Sreeraman Venkitasubrahmanian,Gert W. Bruning,Paul Robert Veldman,Thomas Farkas,Raj Jayaraman,Yongping Xia +5 more
TL;DR: In this article, a dimming ballast for use with a phase control dimmer, and particularly a triac dimmer is presented. But the ballast is not equipped with an EMI filter with a high impedance to avoid excessive voltage and peak currents in the filter due to resonance with the phase controlled AC waveform at low conduction angles.
Patent
Multi-sectioned power converter having current-sharing controller
Stanley Canter,Ronald J. Lenk +1 more
TL;DR: In this paper, an interleaved power converter is constructed so as to substantially equalize the power output of individual converter slices or phases, and the switching of the inductor is controlled as a function of a difference between a magnitude of a voltage potential (VB) of the power bus and a predetermined voltage potential magnitude (Voltage Setpoint).
Patent
Power converter with voltage drive switching device monitored by device parameters and electric parameters
TL;DR: In this paper, a power converter having at least a pair of voltage drive switching elements, which comprises a gate control circuit, a detecting section for detecting at least one of device parameters and a set of electric parameters of the voltage drive switches, and a control section for controlling a gate of the switching elements based on a monitoring result of the detecting section, is presented.