Electricity: single generator systems – With flywheels or massive moving parts
Patent
1982-04-22
1985-06-25
Hickey, R. J.
Electricity: single generator systems
With flywheels or massive moving parts
322 9, 322 40, H02K 702, H02K 718
Patent
active
045256616
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a stand-by energy source, in particular to an electric supply source for substantially continuous power supply upon power interruption, comprising one or more electric rotary machines, a flywheel and some kind of an auxiliary energy source, e.g. a heat engine.
In particular in recent years the number of devices, in which energy must be supplied absolutely continuously or with an insignificant break only, has rapidly increased, for example, the operating rooms and intensive care departments of hospitals, telephone centrals, other for telecommunication, control equipment of energy supplying systems, as well as animal husbandry equipment and poultry brooders in agriculture.
In accordance with the fields of application the demands are also of many aspects. Computing centres, e.g. do not allow even the slightest break, on the other hand, in agricultural plants a drop-out of more than 10-20 minutes results in damages. In addition to the permissible duration of the power cut, with the equipments to be supplied the requirements regarding the characteristics of current are also different.
BACKGROUND ART
To meet the different requirements, the most diverse solutions have been developed. Equipment with a higher demand is supplied with energy stored in an accumulator. In case of necessity the voltage is stabilized or transformed to the form needed. This solution is, however, too expensive, in particular, when a high output is required, and when a long-lasting power cut with an infrequent occurrence is to be met in such a manner. The costs of said equipment are further increased by the fact that a continuous maintenance is imperative, at the same time--in spite of the most careful maintenance--the accumulators deteriorate in a few years.
In case of less strict requirements, when a drop-out in the supply from the mains occurs, the operator puts the Diesel-motor of the auxiliary electrical source into operation and in such a manner energy supply may be ensured within some minutes. With this solution there is a considerable break however, the duration of which depends on the reliability and skill of the operator.
In recent years devices have been developed, where the electromotor supplied from the mains performs a steady rotary motion and simultaneously drives the flywheel. In case of a drop-out the engine functions as a generator and supplies energy to the equipment having been separated from the mains, at the same time by the quick locking of a frictional clutch it is connected to the system, whereby the stand-by Diesel-motor is started. According to the relevant publications the Diesel-motor reaches the nominal speed of rotation within a few hundredth seconds and takes over the drive of the generator from the flywheel. The disadvantage of this solution lies in that when locking the clutch, utmost high mechanical stresses arise, accordingly, the equipment endures such "quick starts" to a limited extent only.
DISCLOSURE OF INVENTION
The aim of the invention is to develop the described stand-by energy source in such a manner that the drawbacks could be eliminated, simultaneously--by keeping the advantageous features--further advantages could be achieved.
In accordance with the invention the object is achieved in such a manner that the elements of the stand-by energy source comprising one or more electric rotary machines, flywheel and some kind of an auxiliary energy source, e.g. a heat engine, are engaged with three elements of planetary gearing arranged around a central shaft, furthermore, two of them are interconnected via a further drive with an infinitely variable transmission.
In a preferred embodiment of the stand-by energy source according to the invention the electric rotary machine being connected to the mains, i.e. the electric rotary machine to be supplied and also connected to the mains, e.g. a generator, a pump, is engaged with the carrier arm of the planetary gearing arrangement, the flywheel to one of the central gears, while the auxiliary energy source is coupled to the other
REFERENCES:
patent: 2900594 (1959-08-01), Bessiere
patent: 2998538 (1961-08-01), O'Mahony
patent: 3221172 (1965-10-01), Rolison
patent: 4439720 (1984-03-01), Georges
Hoos Kazmer
Mucsy Endre
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