Elevator system under use of variable speed transmission

摘要

We propose a new elevator system which uses a continuous variable speed transmission between elevator car and counterweight. For each passenger load, the velocity of the car and the counterweight are adjusted to each other in such a way that the power to move the counterweight compensates the power required to move the car. Due to the different velocities, the distance travelled by car and counterweight per trip are different. As a consequence, the counterweight does not only serve as power balancing management but also as potential energy storage system, which stores and frees potential energy of descending and ascending passengers, respectively.