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US 6,188,200 B1Granted
Power supply system for sump pump
AssigneeAlternate Energy Concepts, Inc.
InventorThomas Maiorano
Life of this patent
Estimating the term…
Abstract
A power supply system for a sump pump including a transformerless inverter circuit with a plurality of MOSFET transistors for powering the pump using either available utility-supplied power or stored power from a battery.
Claims21
A system for selectively providing alternating current power to a pump from an electric utility connection and from a battery, comprising:
- means for receiving power from the electric utility connection;
- charging means connected to the battery and the means for receiving power for charging the battery with power from the electric utility connection and for maintaining the battery in a fully charged state;
- an inverter circuit connected to the battery for outputting alternating current at an inverter output;
- said inverter circuit being a transformerless circuit including a plurality of power MOSFET transistors;
- a conversion relay connected to the inverter output and the electric utility connection for supplying power to the pump from one of the inverter circuit and the electric utility connection to a main output, said conversion relay including first input contacts, second input contacts, output contacts and movable contacts;
- and
- a coil positioned in said conversion relay for drawing the movable contacts into contact with the first input contacts only when power is applied to the first input contacts from the electric utility connection.
4 more elements
A system for selectively providing alternating current power from an electric utility connection and from a battery, comprising:
- charging means connected to the battery and the electric utility connection for charging the battery with power from the electric utility connection and for maintaining the battery in a fully charged state;
- an inverter circuit connected to the battery for outputting alternating current at an inverter output;
- said inverter circuit being a transformerless circuit including a plurality of power MOSPET transistors;
- a conversion relay connected to the inverter output and the electric utility connection for supplying power from one of the inverter circuit and the electric utility connection to a main output, said conversion relay including first input contacts, second input contacts, output contacts and movable contacts;
- and
- a coil positioned in said conversion relay for drawing the movable contacts into contact with the first input contacts only when power is applied to the first input contacts from the electric utility connection.
3 more elements
A method for selectively providing alternating current power from an electric utility connection and from a battery, comprising:
- receiving power from the electric utility connection;
- charging the battery with power from the electric utility connection without overcharging;
- inverting the power from the battery with a transformerless inverter circuit including a plurality of power MOSFET transistors and outputting alternating current at an inverter output of the inverter circuit;
- supplying power from one of the inverter circuit and the electric utility connection to a main output via a conversion relay connected to the inverter output and the electric utility connection, said conversion relay including first input contacts, second input contacts, output contacts and movable contacts;
- and
- drawing, by using a coil positioned in said conversion relay, the movable contacts into contact with the first input contacts only when power is applied to the first input contacts from the electric utility connection.
3 more elements
Dependencies are inferred from the claim text.