Reserve power system
Patent 5896948 Issued on April 27, 1999. Estimated Expiration Date: 
July 24, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
July 24, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3506095 Thyristor Leonard type elevator control system System for controlling a motor Control of an elevator hoisting motor during under voltage conditions in the main power source Patent #: 5229558 InventorsAssigneeApplicationNo. 836988 filed on 07/24/1997US Classes:187/290, With auxiliary supply of electricity187/391WITH MONITORING, SIGNALLING, AND INDICATING MEANSExaminersPrimary: Nappi, Robert E.Foreign Patent References
International ClassB66B 001/06Foreign Application Priority Data1994-11-29 FIAbstractA reserve power system includes a reserve power machine (2) for the generation of power. The reserve power machine (2) is connected via a distribution network (4) to consumers (10,12) and elevator drives (8). The elevator drives include an elevator hoisting motor (28) and a frequency converter (26) controlling it. The elevator drives are provided with regulating devices (26, 44, 46) by means of which the speed of the elevator motor (28) is so adjusted that the power taken by the elevator drive (8) from the distribution network (4) is lower than an adjustable power limit (PA). | |
