2. INVENTOR

NAME NATIONALITY ADDRESS
Sharad Kapoor Indian 162, Sector 5, IMS Manesar Gurgoan-122050 Haryana
PREAMBLE
Complete Specification with claims and drawings FIELD OF INVENTION
An enhanced constant voltage power generation source designed with advanced microprocessor based variable speed governing coupled to a brushless low voltage alternator.
DESCRIPTION OF INVENTION
An enhanced constant voltage power generation source which allows the speed and power output of the engine to closely match the load placed on the generator. The unit is based on the concept to make the power generation of the unit directly proportional to the demand,
using same unit to generate the variable power as per demand, resulting in optimization of fuel consumption and hence lower emissions increasing overall unit efficiency, reduced maintenance, minimal power losses and better overall efficiency.
The output of the claimed unit is 6.8 KW at 48V DC @ 3000 rpm with more than 80% efficiency. Main Application considerations are that of critical and sensitive variable DC loads for one where the claimed unit is charging the larger battery banks and simultaneously feeding other connected low DC voltage inputs that are needed in one such application.
Advantages with this claimed invention/unit are as follows:
i. Better fuel economy,
ii. Reduced emissions,
iii. Excellent power to weight ratio,
iv. Small overall size,
v. Low impedance, constant DC voltage output on variable speed and purely DC load output, operating cost effectiveness with minimum and minimum losses and faster pay back.
PRIOR ART
A variable-speed generator/motor system has a well-known configuration as disclosed, for example, in U.S. Pat. No. 4,481,455. The primary winding of the generator/motor is connected to a power system through a main circuit including a circuit breaker and a main transformer, and the secondary winding which is installed on the generator/motor rotor directly coupled to a prime mover/load, is connected to the power system through a frequency converter and an excitation transformer. This system, which has a great advantage in that the rotational speed of
the prime mover/load may be set regardless of the frequency of the AC system, already finds some applications for variable-speed pumped-storage power stations and flywheels. In applications to the variable-speed pumped-storage power station, for instance, the secondary winding of the generator/motor is installed on the rotor directly coupled with a water turbine/pump as a prime mover/load and excited by the frequency converter, so that the primary winding of the generator/motor (generator) is energized by the water turbine in power generation mode thereby to supply the power system with the power generated in the primary winding thereof. In motor (pumping) mode, on the other hand, the generator/motor is driven as a motor by the power from the power system, and water is pumped by a pump directly coupled to the rotor. In this case, in spite of the power system frequency which is fixed to, say, 60 Hz, the rotational speed of the water turbine/pump can be selected as desired independently, and it is thus possible to set the water turbine-pump to a rotational speed which maximizes the operating efficiency thereof.
ORIGIN - COCEPT OF THE INVENTION
In the present scenario it is claimed that irrespective of load requirement the prime mover runs at constant speed consuming a bare minimum of fuel required for running the prime mover that contributes considerably to fuel wastage and also resulting in reducing the prime mover life cycle, emitting avoidable exhaust gases. This claimed concept is primarily based on eco friendly need which is mainly based on the fuel consumption that is directly proportional to the energy requirements.
The object of this claimed invention is to provide clean variable power at constant DC voltage. An efficient magnetic field having a variable polar flux influence act makes stator to produce constant voltage at variable speed. With this object, present claimed invention will become readily apparent for the further review on the following specifications and drawings.
BENEFITS OF THE CLAIMED INVENTION i. Generates constant voltage at variable speed.
ii. Speed varies as there is a variation in the load.
iii. Reduced engine exhaust emissions at lighter loads.
iv. Reduced engine noise level at lighter loads.
v. Low fuel consumption, with the direct effect with an increase in prime mover life cycle.
vi. Substantial mass and volume reduction.
vii. Minimum losses.
viii. Solid-state relay used for load transferring from mains to GenSet and vice-versa.
ix. AMF controller, AVR and alternator designs that have peak electrical efficiency and maintain that efficiency over a wide range of speed and loads.
WORKING OF THE INVENTION
The claimed invention is primarily based on the parts of the Generator which is mainly consisting of Electronically governed engine, 3 phase alternator, 3 phase bridge rectifier, LC filter circuit, microprocessor based controller, power contactor etc. [- as shown in the "FIG 1" of the Specification]
Speed controlling of the engine
Microprocessor based controller sensing the load current produces a speed command signal and sends to the electronically governed system. On receipt of this command signal the electronic system reacts and adjusts the actual speed through the speed sensor. By comparing these two signals it gives the resultant to the stepper motor for operating the throttle valve of the engine and therefore resulting the making of the engine directly proportional to the speed demand as sent by the user interface as shown in the "FIG 2" of the specification.
Internal structure of the alternator:
It is three phase single bearing brushless direct coupled alternator. The terminal voltage at the induction alternator is kept almost constant with techniques of varying the flux in the induction generator to regulate the generator voltage when the rotor speed is varied and also DC voltage is maintained by constant voltage as shown in the diagram 3 of the specification.
Conversion of AC voltage to DC voltage
Further, the 3 phase of the Alternating Current is converted to the 48 Volts Direct Current with the help of the bridge rectifier as shown in the diagram (3) of the specification. The novelty in the invention therefore lies in the self sustaining operational constant system which is directly linking the speed demand [- user interface] to the variable speed engine to eventually produce the constant voltage.

We claim
1. A Constant Voltage Power Generation Source designed with advanced microprocessor based variable speed governing engine coupled with a brushless low voltage alternator.
2. A Constant Voltage Power Generation Source as set forth in claim 1 comprising of electronically governed engine, 3 phase alternator , 3 phase bridge rectifier, LC filter circuit, microprocessor based controller, power contactor.
3. A power source as set forth in claim 1, wherein microprocessor based controller is sensing the load current, produces a speed command signal and sends to the electronically governed system. On receipt of this command signal the electronic system reacts and adjusts the actual speed signal through the speed sensor. By comparing these two signals it gives the resultant to the stepper motor for operating the throttle valve of the engine.
4. Constant Voltage Power Generation Source as set forth in claim 1 comprising three phase single bearing brushless direct coupled alternator. The terminal voltage at the induction alternator is kept almost constant with techniques of varying the flux in the induction generator to regulate the generator voltage when the rotor speed is varied and also DC voltage is maintained by constant voltage.
5. Constant Voltage Power Generation Source as set forth in claim 1 providing an AC/ DC voltage converter which includes a three phase bridge rectifier. An AC voltage source is connected to the three input terminals of the rectifier circuit. The two output terminals of the rectifier circuit are connected to the terminals of the step-up converter circuit. AC power supply providing a rectified and smoothed DC voltage from an AC power source;