Juan A Sabate

Title: Innovations of Juan A. Sabate

Introduction

Juan A. Sabate is an accomplished inventor based in Saratoga Springs, NY (US). He holds a total of 4 patents that showcase his expertise in electronic ballast technology and power supply systems. His innovative contributions have significantly impacted the field of electrical engineering.

Latest Patents

One of his latest patents is an electronic ballast with feed-forward control. This invention is designed to power a discharge lamp from a source of rectified, but unregulated, power that has a varying DC voltage. The ballast utilizes a self-oscillating converter to produce pulses at a nominal operating frequency determined by a resonant tank. This resonant tank converts the pulses into a sinusoidal current for powering the discharge lamp, incorporating an inductive impedance in series with the lamp to provide a voltage drop that varies with the operating frequency. The feed-forward control circuit automatically adjusts the operating frequency in response to variations in the DC source voltage, allowing for effective regulation of the voltage supplied to the discharge lamp without needing to sense the lamp voltage itself.

Another significant patent is a two-stage switching power supply for connecting an AC power source to a load. This power supply is structured in two stages, with the primary of the power transformer in the first stage and the secondary in the second stage. The first stage includes an EMI filter connected to the input of a rectifier, which feeds into a self-oscillating, half-bridge, resonant inverter. This design provides isolation from the power source while using feed-forward control to compensate for line variations, resulting in minimal output voltage variation compared to input voltage variation. The second stage utilizes the secondary of the transformer to provide input to post-regulator circuitry, which includes a PWM control circuit to regulate the output current based on the error signal representing the difference between the sensed current and the desired value.

Career Highlights

Throughout his career, Juan A. Sabate has worked with notable companies, including Koninklijke Philips Corporation N.V. and Philips Electronics North America Corporation. His experience in these organizations has allowed him to develop and refine his innovative ideas in electrical engineering.

Collaborations

Juan has collaborated with esteemed colleagues such as Gert W. Bruning and Shri Sridhar. These partnerships have contributed to the advancement of his projects and innovations.

Conclusion

Juan A. Sabate