Power plants – Motor operated by expansion and/or contraction of a unit of... – Unit of mass is a gas which is heated or cooled in one of a...
Patent
1991-06-18
1992-09-15
Ostrager, Allen M.
Power plants
Motor operated by expansion and/or contraction of a unit of...
Unit of mass is a gas which is heated or cooled in one of a...
F02G 1045
Patent
active
051467500
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
1. Field of the Invention
This invention relates to Stirling cycle machines, also known as regenerative thermal machines, and more particularly to a new type of mechanical arrangement for an Alpha type Stirling thermal machine which employs resonance-tuned pistons within a hermetically sealed and permanently lubricated housing. In one configuration, both the expansion piston and the compression piston carry an integral permanent magnet armature assembly, each of which oscillates within and either drives or is driven by an exterior stator coil. The motion of the pistons is maintained in an appropriate phase relationship by means of a unique electronic quadrature phase-locking circuit and is devoid of the gears, bearings, flywheels, crankshafts, pistons rods, seals, and other such complex and unreliable components common to traditional Alpha machine designs. The invention is a machine, novel in construction and operation (Magnetoelectric Resonance Engine), and can be expected to have broad application both as an electric generator (Magnetoresonant Generator) and as an electric heat pump (Magnetoresonant Heat Pump). It was the subject of Disclosure Document No. 228179, received in the U.S. Patent and Trademark Office on May 30, 1989.
In the field of generators, Magnetoresonant Generators produce both 12-volt DC and standard 120-volt AC electricity, for example, in order to provide quiet, compact, convenient, and economical power sources for boats, camping equipment, construction sites, and countless other portable, remote, mobile, or standby power applications. These applications may be broadly categorized as follows: (1) portable power systems; (2) marine power systems; (3) remote power systems; (4) residential power systems; (5) industrial power systems; (6) health care power systems; (7) military power systems; (8) space power systems; and (9) Stirling-electric drive or propulsion systems. In the field of heat pumps and refrigerators, Magnetoresonant Heat Pumps consume electric power in order to produce heating and cooling effects in all manner of heat pump, refrigerator, air conditioning, cooling, chilling, and freezing devices and applications.
2. Description of the Prior Art
The Stirling cycle engine is a reciprocating heat engine which operates by transferring heat from an external source into the cylinder through a solid wall, rather than by exploding a fuel-air mixture within the cylinder. This is known as an external combustion engine (although the heat may come from sources other than burning fuel such as solar or nuclear), as opposed to the familiar 10 internal combustion engine. The heat is transferred to an internal gaseous working fluid which is sealed within the cylinder and undergoes closed cycle heating, expansion, cooling, and compression, alternately flowing back and forth 15 through a thermal storage device known as a regenerator.
As more fully described in earlier Moscrip U.S. Pat. Nos. 4,413,473; 4,413,474; 4,413,475; and 4,429,732; heat is supplied continuously in one part of the machine, called the heater, and is removed continuously in another part of the machine called the cooler. The regenerator picks up heat when the gas goes from the hot side to the cold side and gives up heat to the gas when it is moving in the opposite direction. The simplest Stirling engine configuration, known as the Alpha configuration, is one in which there are one or more pairs of sealed pistons, one, a compression piston and the other, an expansion piston. The motion of one piston leads the motion of the other piston by a mechanical phase angle of approximately ninety degrees. The phase angle is often prescribed by the design of a crankshaft, swashplate, or other mechanical element.
The continuous burning of fuel attainable in engines employing external as opposed to internal combustion permits the achievement of high temperatures and other conditions which result in complete combustion. This in turn leads to exceptionally low levels of undesirable components the exhaust emissions. Because th
REFERENCES:
patent: 4458489 (1984-07-01), Walsh
patent: 4873826 (1989-10-01), Dhar
Ostrager Allen M.
Wilkins Gordon W.
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