초록 ▼

A magnetocaloric inductor circuit operates either as a monostable or bi-stable device. Mirror symmetrical permanent magnets each include first and second poles. A pole shoe is connected to the first pole of each magnet. A control core with control coil is connected between the pole shoes. The opposi

A magnetocaloric inductor circuit operates either as a monostable or bi-stable device. Mirror symmetrical permanent magnets each include first and second poles. A pole shoe is connected to the first pole of each magnet. A control core with control coil is connected between the pole shoes. The opposite poles of the first and second permanent magnets are either connected to each other by a shunt or a second set of pole shoes with their own control core. A monocrystalline metamagnetic disk is connected to an end of each pole shoe or shunt. Yoke cores are connected between the disks for each permanent magnet. An induction coil is engaged around each yoke core. A leakage flux compensation core is also connected between the ends of the yoke core for accommodating leakage flux. By controlling the current through the control coil, the field intensity at the metamagnetic disk can be altered. The metamagnetic disks have a characteristic threshold field intensity above which they become ferromagnetically conductive. Below this threshold, the disks are non-ferromagnetically conductive. Current can thus be controlled through the induction coils of the yoke cores by utilizing a smaller control current through the control cores. Each time the magnetic condition of the disks changes, heat is absorbed from the ambient. In this way the apparatus both operates to convert electrical and magnetic energy and to produce a cooling effect.

대표청구항 ▼

A magnetocaloric inductor apparatus for inducing electrical power and for producing a cooling effect, comprising: at least one main permanent magnet having opposite poles; at least one dynamo pole shoe connected to one pole of said main magnet for receiving lines of magnetic flux; flux return means

A magnetocaloric inductor apparatus for inducing electrical power and for producing a cooling effect, comprising: at least one main permanent magnet having opposite poles; at least one dynamo pole shoe connected to one pole of said main magnet for receiving lines of magnetic flux; flux return means connected to the other pole of said main magnet for returning lines of flux thereto; a first monocrystalline metamagnetic disk connected to said shoe; a second monocrystalline magnetic disc connected to said flux return means; said first and second disks becoming ferromagnetically inductive above a characteristic threshold field intensity and non-conductive below the threshold field intensity; a yoke core connected between said first and second disk; an induction coil connected to said yoke core for receiving induced current due to the passage of lines of magnetic flux through said yoke core; a control core operatively connected between at least one of the poles of said main magnet and said shoe for diverting lines of flux from said yoke core; a control coil connected to said control core for receiving control current to determine the amount of flux diverted from said yoke core through said control core for controlling the field intensity at said first and second disks to control ferromagnetic conductivity thereof; and at least one leakage flux compensation core connected across said yoke core for receiving leakage magnetic flux across said yoke core.