Uninterruptible power supply system with engine start-up
View Patent ↗An uninterruptible power supply system has a regulated power source, an electrical generator electrically interconnected to the regulated power source, an engine having a main shaft integral with or coupled to the shaft of the electrical generator, a rotating rectifier mounted onto a shaft of the electrical generator, a mains power supply, a switch connected between the electrical generator, the mains power supply and a synchronous machine of the regulated power source, a synchronous generator, and an uninterruptible load. The regulated power source has a housing, a synchronous machine, a synchronous generator, and a flywheel sharing a common shaft. The electrical generator has a shaft coupled to a combustion engine. The switch transfers power from the synchronous machine to the electrical generator to cause the electrical generator to rotate its shaft or the main shaft of the engine. A short-stop load is supplied power from the electrical generator.
1. A system for starting an engine comprising:
a regulated power source having a housing, a synchronous machine and a flywheel sharing a common shaft in the housing; said synchronous machine comprising:
an excitation stator winding;
an excitation rotor winding cooperative with said excitation stator winding, said excitation rotor winding rotating with a rotation of the common shaft of said regulated power source;
a main stator winding;
a main rotor winding cooperative with said main stator winding, said main rotor winding affixed to said common shaft and rotatable with the rotation of the common shaft of said regulated power source; and
a squirrel cage winding cooperative with said main stator winding and said main rotor winding, said squirrel cage winding being rotatable with the rotation of the common shaft of said regulated power source;
an electrical generator having a shaft therein;
the engine having a main shaft integral with or coupled to said shaft of said electrical generator;
a mains power supply; and
a switch cooperative with said electrical generator and said mains power supply and the synchronous machine of said regulated power source, said switch selectively making an electrical connection between said synchronous machine and said mains power supply, said switch adapted to transfer electric power from the synchronous machine of said regulated power source to said electrical generator so as to cause said electrical generator to rotate the shaft thereof in order to rotate the main shaft of said engine during startup of said engine.
2. The system of claim 1 , wherein the regulated power source comprises a synchronous generator supplying electrical power to an electrical load.
3. The system of claim 1 , the synchronous machine driving the common shaft of said regulated power source, said regulated power source having a power line, the power line being connected to said switch.
4. The system of claim 1 , said regulated power source further comprising:
a voltage controller electrically connected to said excitation stator winding of said synchronous machine so as to cause a voltage to develop in said main stator winding.
5. The system of claim 1 , further comprising:
a rotating rectifier affixed to the common shaft and electrically connected to said excitation rotor winding and said main rotor winding of the synchronous machine of said regulated power source.
6. The system of claim 1 , said regulated power source being switchable by said switch so as to be electrically connected to the mains power supply so as to supply power from said mains power supply to said regulated power source.
7. The system of claim 1 , said engine being an internal combustion engine.
8. The system of claim 1 , said mains power supply being a three-phase AC power supply.