Power supply for elevator systems having variable speed drives
First Claim
Patent Images
1. A regenerative elevator system, the system comprising:
- two or more elevators, each elevator comprising a variable speed drive, each variable speed drive comprising a direct current bus, and further wherein at least one of the variable speed drives is non-regenerative and one of the variable speed drives is regenerative; and
,a common direct current bus connected to the direct current bus of each variable speed drive, wherein the variable speed drive of each elevator is capable of supplying power to the common direct current bus when the elevator produces energy and capable of consuming power from the common direct current bus when the elevator consumes energy.
3 Assignments
0 Petitions
Accused Products
Abstract
An improved system of variable speed drives that enhances the energy efficiency of an elevator system by enabling power transfer between the variable speed drives of two or more elevators via a common DC bus. Any combination of regenerative and non-regenerative variable speed drives may be used with the present invention. Energy storage devices may be connected to the common DC bus further improve efficiency.
36 Citations
12 Claims
-
1. A regenerative elevator system, the system comprising:
-
two or more elevators, each elevator comprising a variable speed drive, each variable speed drive comprising a direct current bus, and further wherein at least one of the variable speed drives is non-regenerative and one of the variable speed drives is regenerative; and
,a common direct current bus connected to the direct current bus of each variable speed drive, wherein the variable speed drive of each elevator is capable of supplying power to the common direct current bus when the elevator produces energy and capable of consuming power from the common direct current bus when the elevator consumes energy. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
Specification