Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Frequency converter, procedure for controlling it and motor control using a frequency converter

Frequency converter, procedure for controlling it and motor control using a frequency converter

US Patent 5523937 · Granted Jun 4, 1996

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Switch assembly2017
Power supply arrangement of an elevator2013
Elevator reluctance linear motor drive system2001
Programmable operating panel for an elevator car1997
Elevator and a procedure for its control1993
Procedure for the regulation of an asynchronous motor1993
Method and apparatus for the measurement and tuning of an elevator system1991
Procedure and apparatus for damping the vibrations of an elevator car1991
Bi-directional d.c./d.c. converter compatible with an inverter bridge1990
Method for determining the position of an elevator car and a pulse count based f1989
Inverter control apparatus for elevator motor1989
Voltage regulation for three-phase inverters1989