Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Method and apparatus for controlling an electric motor of an elevator without an encoder

Method and apparatus for controlling an electric motor of an elevator without an encoder

US Patent 9731935 · Granted Aug 15, 2017

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Drive system and method for controlling a drive system2025
Elevator brake release monitoring2024
Method for reducing thermal stress of a power semiconductor switch, an electrica2024
Elevator brake release monitoring2022
Method for determining rotor position of electric motor, elevator and electrical2022
Method of initiating a regenerative converter and a regenerative converter2021
Elevator brake release monitoring2021
Elevator safety arrangement having earth fault detection2021
Method for controlling unintended vertical speed and acceleration of an elevator2019
Method for performing an emergency stop using a declaration profile of an electr2019
Fully adjustable brake controller without need of DC-link2019
Elevator car overload monitoring to prevent starting2019