The invention pertains to a switchmode power inverter, and particularly to a half-bridge inverter for asymmetrical load. More particularly, the invention pertains to high frequency electronic ballast for gas discharge devices, especially for high intensity discharge lamps, completed by an internal high voltage ignition circuit and transient current control protecting against the asymmetrical feature of high intensity discharge lamps at startup.
Low Frequency Electronic Ballast For Gas Discharge Lamps
An electronic ballast for high intensity gas discharge lamps where the wave form of the lamp current is square wave providing acoustic resonance and flickering free operation. The circuit, having high efficiency, operates in a wide temperature range providing ideal ballast curve and reliable ignition for the lamps. Furthermore, significant energy saving can be achieved by its externally controlled built in dimming capability.
Master-Slave Half-Bridge Dc-To-Ac Switchmode Power Converter
Oscar Vila-Masot - Puerto La Cruz, VE Janos Melis - Miami FL
Assignee:
LED Corporation N.V. - St. Maarten
International Classification:
H05B 3702
US Classification:
315209R
Abstract:
The invention pertains to a switchmode DC to AC converter, and particularly to a master-slave half-bridge converter. The slave half-bridge power converter is controlled by a lower power self-oscillating half-bridge master converter. More particularly, the invention pertains to a high frequency ballast for gas discharge devices, especially, for high pressure sodium lamps, completed by a high voltage ignition apparatus. A pair of self-saturated electronically switched transformers controlled by a low power current source provide a power controlled and frequency modulated high frequency ballast for the gas discharge devices.
Power Factor Correction Device Provided With A Frequency And Amplitude Modulated Boost Converter
Oscar Vila-Masot - Puerto La Cruz, VE Janos Melis - Miami FL
Assignee:
LED Corporation N.V. - St. Maarten
International Classification:
H02M 706 G05F 170
US Classification:
363 89
Abstract:
A power factor correction circuit used to improve the ratio of real power to apparent power in an electric power distribution line containing a source of AC sinusoidal voltage and a load. The circuit includes a frequency and amplitude modulated boost converter forcing the input current to have the same wave shape as that of the input voltage.
Master-Slave Half-Bridge Dc-To-Ac Switchmode Power Converter
Oscar Vila-Masot - Complejo Turistico, VE Janos Melis - Miami FL
Assignee:
LED Corporation N.V. - St. Maarten
International Classification:
H05B 3702 H05B 3904
US Classification:
315226
Abstract:
A switchmode DC to AC converter, and particularly a master-slave half-bridge converter. The slave half-bridge power converter is controlled by a lower power self-oscillating half-bridge master converter. More particularly, the invention pertains to a high frequency ballast for gas discharge devices, especially, for high pressure sodium lamps, completed by a high voltage ignition apparatus.
Self-Symmetrizing And Self-Oscillating Half-Bridge Power Inverter
Oscar Vila-Masot - Puerto La Cruz, VE Janos Melis - Miami FL
International Classification:
H02M 75383
US Classification:
363 23
Abstract:
The invention pertains to a switchmode DC-to-AC inverter, and particularly to a self-symmetrized and self-oscillating half-bridge inverter. More particularly, the invention pertains to a high frequency ballast for gas discharge devices, especially for high intensity discharge lamps, including power control, frequency modulation and high voltage ignition apparatus.
Frequency Controlled Half-Bridge Inverter For Variable Loads
The invention pertains to a switchmode power inverter, and particularly to a frequency controlled half-bridge inverter. More particularly, the invention pertains to high frequency ballast for gas discharge devices, especially for high intensity discharge lamps, completed by an internal high voltage ignition circuit and an external control apparatus for dimming.
Low Frequency Square Wave Electronic Ballast For Gas Discharge
A low frequency square wave electronic ballast used for a gas discharge device includes a high power factor pre-regulator connected to a sinusoidal AC power supply and a power controlled DC current source connected to the pre-regulator. A low frequency square wave DC-to-AC inverter is connected to the DC current source and an ignitor circuit is connected to the inverter. A monitor circuit as well as a low power stabilized logic supply voltage source are also employed. The entire circuit is connected to a gas discharge device such that the instantaneous power of this device is constant and controlled providing an acoustic resonance free operation and an ideal ballast curve.
Name / Title
Company / Classification
Phones & Addresses
Janos Melis President
Ballastronic, Inc. Commercial Physical and Biological Research
3918 Sw 61St Ave, Miami, FL 33155
Janos Melis President, Treasurer, Director
Ballastronic, Inc Commercial Physical Research
3918 SW 61 Ave, Miami, FL 33155 5109 Mcintyre Cir, Austin, TX 78734 Andrassy Ut 117, North Hampton, MA 01062 305 665-6368