Company Filing History:
Years Active: 1987
Title: Innovations by Hansruedi Liechti
Introduction
Hansruedi Liechti is a notable inventor based in Buchrain, Switzerland. He has made significant contributions to the field of elevator technology. His innovative approach has led to the development of a unique patent that enhances the efficiency and safety of elevator systems.
Latest Patents
Hansruedi Liechti holds a patent for a converter-powered drive for an elevator. This invention features a twelve-pulse converter with an a.c. input and a d.c. output connected to an armature via two thyristors in a change-over circuit. The extinguishing circuit includes a resistor, a capacitor, an inductor, and a thyristor, which is also linked to the armature through related diodes. A current transformer in the armature circuit ignites the thyristor in the extinguishing circuit when excess current occurs. The extinguishing capacitor is continuously connected to a charging circuit and is parallel to the thyristor of the extinguishing circuit, as well as the thyristors connected to the d.c. negative pole. When the thyristor of the extinguishing circuit is ignited, the d.c. negative pole connected thyristors are cut off, dissipating energy in the armature circuit through the resistor in the extinguishing circuit. The zero-crossing of the current is detected using two voltage converters connected to both the d.c. negative and positive poles of the converter, as well as the armature. Non-current conducting thyristors connected to either the d.c. negative or positive pole are ignited based on information derived from the voltage converters.
Career Highlights
Hansruedi Liechti has made a significant impact in the field of elevator technology through his work at Inventio AG. His innovative designs and patents have contributed to advancements in the efficiency and safety of elevator systems. His dedication to research and development has positioned him as a key figure in the industry.
Collaborations
Hansruedi has collaborated with Ray Stanyard, enhancing the development and implementation of innovative elevator technologies. Their partnership has fostered a creative environment that encourages the exploration of new ideas and solutions.
Conclusion
Hansruedi Liechti's contributions to elevator technology through his innovative patent demonstrate his expertise and commitment to advancing the field. His work continues to influence the industry, ensuring safer and more efficient