Uninterruptible electric power supply
US4059770A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 15, 1974 |
| Grant date | Nov 22, 1977 |
| Priority date | — |
| Expiry date | Oct 15, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J9/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric power supply system for a load wherein two prime movers, a gas turbine and a synchronous electric motor receiving its motive energy from a source of electric power, such as a public utility, are utilized to simultaneously drive an electric generator. A fuel controller, which is responsive to the output of the generator, operates in an isochronous mode and regulates the supply of fuel to the gas turbine from a fuel source to bring the turbine, generator, and motor up to operating speed. A paralleling controller, which is responsive to both the output of the generator and the output of the utility power source connects the motor to the utility when the outputs of the generator and utility are of equal frequency and phase so that the motor shares the load in driving the generator. A power sensor compares the flow of electric energy to the motor with a fixed reference signal, and generates a resultant difference signal which is used to trim the turbine fuel controller to speed up or slow down the turbine so that constant power flows through the power sensor and motor, resulting in the motor always providing a fixed or predetermined amount of driving force to the generator w…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.