Location History:
- Numminen, FI (2017 - 2019)
- Helsinki, FI (2019 - 2023)
Company Filing History:
Years Active: 2017-2023
Title: Pasi Raassina: Innovator in Elevator Technology
Introduction
Pasi Raassina is a prominent inventor based in Helsinki, Finland. He has made significant contributions to the field of elevator technology, holding a total of 16 patents. His innovative designs focus on enhancing the safety and efficiency of elevator systems.
Latest Patents
One of Raassina's latest patents is a drive device having safety circuits using logic states for an elevator. This invention includes a frequency converter connected to a public AC supply network and an elevator motor. The frequency converter features a network rectifier, a motor bridge, and a DC intermediate circuit. The motor bridge is controlled by a circuit that regulates motor speed through control pulses. Additionally, the drive device incorporates drive prevention circuits that ensure safety by interrupting the connection between the control circuit and the motor bridge based on safety signal statuses.
Another notable patent involves a method and elevator control unit designed for moving an elevator car to a landing floor during events related to the main electrical power supply. This method includes charging energy from the main power supply into an external electrical energy storage before detecting any predefined events. It also controls the electric motor to decelerate the elevator car while producing regenerative electrical energy, ensuring the elevator brake remains deactivated.
Career Highlights
Pasi Raassina is currently employed at Kone Corporation, a leading company in the elevator and escalator industry. His work focuses on developing advanced technologies that improve the safety and functionality of elevator systems.
Collaborations
Throughout his career, Raassina has collaborated with notable colleagues, including Ari Kattainen and Arto Nakari. These partnerships have contributed to the successful development of innovative elevator solutions.
Conclusion
Pasi Raassina's contributions to elevator technology through his patents and collaborations highlight his role as a key innovator in the field. His work continues to influence the safety and efficiency of elevator systems worldwide.