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| Number | Title | Issue Date |
| 7405382 | System for microwave enhanced chemistry According to the present invention, a microwave generator includes a variable voltage provided from a first transformer to a second transformer having a secondary winding split into a filament winding cathode low AC signal and a secondary winding providing a high vo... | 07/29/2008 |
| 7253383 | Transformer assembly for microwave oven, method for manufacturing the same, and microwave oven having the same A transformer assembly for a microwave oven having a magnetron, including a transformer to apply voltage to the magnetron of the microwave oven; a container receiving the transformer therein and having a base plate coupled to the microwave oven and a cover body coup... | 08/07/2007 |
| 7221558 | Galvanically isolated delivery of power to high voltage circuits parts A high voltage switching apparatus delivers kV pulses to a load such as a magnetron. The switching apparatus comprises a switching stack surrounded by capacitors and both arranged within a housing. Lt power is supplied to the stack, e.g. for control electronics, by ... | 05/22/2007 |
| 7061357 | High voltage transformer and microwave oven provided with the same A high voltage transformer includes a core, an output terminal, and an insulation member. The core is surrounded by coils to boost an alternating current voltage, and is grounded. The output terminal outputs the voltage boosted by the plurality of coils. The insulat... | 06/13/2006 |
| 6987254 | Microwave oven A microwave oven to prevent a side plate of a cabinet from vibrating due to an electromagnetic field which is generated around a high-voltage transformer installed in a machine room. An anti-vibration plate is provided at a predetermined position inside the side pla... | 01/17/2006 |
| 6965100 | Method for controlling output power of a combination hood and microwave oven The present invention relates to an apparatus and method for controlling output power of a combination hood and microwave oven, and more particularly, to an apparatus and method for controlling power of a combination hood and microwave oven, wherein an output level ... | 11/15/2005 |
| 6856095 | High frequency heating device This invention provides a magnetron high frequency device which includes: a filtering inductor coupled to a positive end of a direct current power supply; a central tap transformer having a central tap end, a first end and a second end; a filtering capacitor; a firs... | 02/15/2005 |
| 6737621 | Microwave oven and high voltage control circuit of the same A microwave oven having a high voltage control circuit which prevents an overheating of a high voltage transformer. The high voltage control circuit includes a thermostat which is turned on or off according to a temperature of the high voltage transformer. The therm... | 05/18/2004 |
| 6414291 | Transformer for a microwave oven A transformer for a microwave oven capable of preventing quality deterioration thereof due to damaged insulating paper, includes a first core having a coil inserting section having one open side; a plurality of coils sequentially inserted into the coil in... | 07/02/2002 |
| 6414287 | Parts arrangement structure for DC microwave oven Disclosed is a parts arrangement structure for a DC microwave oven which is formed by a combination of an upper panel, a lower panel and a rear panel, a space inside the DC microwave oven being divided into a device chamber in which a magnetron and an air... | 07/02/2002 |
| 6320171 | Microwave oven A microwave oven having a body casing forming a cooking chamber, an outer casing enclosing the body casing, and a magnetron for supplying the cooking chamber with microwaves is provided. The microwave oven includes a plurality of high-voltage transformers... | 11/20/2001 |
| 6313450 | Microwave oven capable of supplying AC power A non-directional frequency generator inputs direct current power and outputs alternating current power. A high voltage transformer inputs the alternating current power, and either induces a higher voltage for driving the magnetron, or induces and outputs... | 11/06/2001 |
| 6297593 | Boosting transformer for high-frequency heating device A boosting transformer for a high-frequency heating apparatus includes an insulation member, and a primary winding and a secondary winding formed at the insulation member and mutually isolated by the insulation member, each winding having a width and a th... | 10/02/2001 |
| 6064049 | Magnetron driving control apparatus of microwave oven and method thereof The magnetron driving control apparatus of a microwave oven and a method thereof by which voltage at output side of a high voltage transformer and voltage of a magnetron are detected by a first and second voltage detecting units and a cooking process stat... | 05/16/2000 |
| 5973307 | High voltage transformer with side insulation support and formed with through-holes for lead wires A high voltage transformer, especially for use in a microwave oven is provided. The high voltage transformer includes: a primary coil to which a commercial power supply is connected; a secondary coil for inducing a high voltage necessary for driving a mag... | 10/26/1999 |
| 5954988 | High voltage transformer of a microwave oven having a structure for radiating heat A high voltage transformer of a microwave oven has a structure for radiating heat efficiently. The high voltage transformer comprises a core formed of a plurality of iron plates fixed together one after another, a coil wound on the core, and heat radiatio... | 09/21/1999 |
| 5942145 | Driving circuit of turntable motor in microwave oven The invention relates to an apparatus and method for operating a turntable motor in a microwave oven. The inventive system includes a transformation of a commercial power supply into a lower voltage power source for application to the turntable motor when... | 08/24/1999 |
| 5739736 | Mounting arrangement for a high-voltage transformer of a microwave oven A microwave oven includes a compartment in which a magnetron and a high-voltage transformer are disposed. The transformer includes coils disposed within a core. The core has holes formed in its underside, which are aligned with respective through-holes fo... | 04/14/1998 |
| 5660756 | High-voltage transformer for a microwave oven power supply In a high-voltage transformer for the power supply of a magnetron in a microwave oven, of the type comprising a primary coil, a high-voltage secondary coil and a heater secondary coil, the two secondary coils are superimposed by being wound on a casing th... | 08/26/1997 |
| 5653906 | Control system for a microwave oven, a microwave oven using such a control system and methods of making the same A control system for a microwave oven having a magnetron unit, a microwave oven using such a control system and methods of making the same are provided, the system being adapted to interconnect a power source to a transformer unit of the magnetron unit to... | 08/05/1997 |
| 5300744 | High-frequency heating device employing switching type magnetron power source A high-frequency heating device includes a power converter for converting an electric power from a commercial power source or the like into a high-frequency power, a step-up transformer having a high-voltage winding and a low-voltage winding, a magnetron ... | 04/05/1994 |
| 5283411 | Driving circuit for a microwave oven A microwave oven driving circuit for stably driving a microwave oven wherein a certain output of a magnetron can be generated by controlling a microcomputer. First and second comparing portions control a voltage supplied from a power supply portion and an... | 02/01/1994 |
| 5250774 | Power supply circuit for driving magnetron A power supply circuit for driving a magnetron equipped in a microwave oven, provides a stable power to the magnetron by preventing instability of output voltage due to LC resonance between a high voltage condenser (HVC) for driving a secondary winding of... | 10/05/1993 |
| 5243163 | Electrical supply circuit for a load such as a magnetron Supply circuit adapted to supply a magnetron (1) and comprising a high loss inductive voltage increasing transformer (8) whose primary winding (13) is mounted in series with a commutation element (14) adapted to chop the voltage and whose secondary windin... | 09/07/1993 |
| 5212360 | Line voltage sensing for microwave ovens A microwave oven with a power supply including a transformer having primary and secondary windings, with the primary winding having a plurality of input connections and a secondary winding being coupled to a magnetron. The microwave oven includes a circui... | 05/18/1993 |
| 5170112 | Power supply device for supplying power to a filament of a radar transmitter An improved power supply device is disclosed where the filament (2) of a transmitter tube (1) is powered by an AC generator (18) via a transformer (12) and a rectifier (24), and where the AC generator (18) receives a feedback via the bifilar winding (5) o... | 12/08/1992 |
| 5122946 | Quasi push-pull single switch current-fed fly-back converter A quasi push-pull single switch current-fed fly-back converter is used as the power supply for the magnetron of a microwave oven. A voltage doubler output circuit has a high impedance. A small magnetic circuit includes a transformer having a primary windi... | 06/16/1992 |
| 5025489 | Transformer having shielding wall for driving a magnetron A stationary induction apparatus for supplying and receiving high frequency power of several tens KHz, wherein a partition wall made of a non-magnetic metallic foil in a thickness less than 1/10 the depth of penetration in the using freqency for electroma... | 06/18/1991 |
| 5001318 | High frequency heating apparatus with abnormal condition detection A microwave oven includes a step-up transformer having primary and secondary windings, an inverter inducing a high frequency oscillating current at the primary winding of the transformer by an on-off operation of a switching element, a magnetron to which ... | 03/19/1991 |
| 4933830 | Switching power supply A switching power supply using a step-up transformer whose impedance viewed from its primary side is different from the impedance viewed from its secondary side whereby the inductance of its primary and secondary windings are settable independently of eac... | 06/12/1990 |
| 4888461 | High-frequency heating apparatus A high frequency heating apparatus includes an inverter controlling circuit for controlling a semiconductor portion for feeding a low voltage power supply switching element, a low voltage power supply to the controlling circuit, an operation switch for ac... | 12/19/1989 |
| 4886951 | Power supply for a magnetron having a rectifying circuit, switching circuit, and transformer A power supply for a magnetron includes a rectifying circuit, a switching circuit, and a transformer. The rectifying circuit converts an ac-power source signal into a dc-power source signal. The switching circuit converts the dc-power source signal output... | 12/12/1989 |
| 4885445 | High-frequency transformer for microwave oven A high-frequency transformer for a microwave oven comprises: an E-shaped first core of ferrite of a low-voltage side; a primary winding wound around the first core over a coil bobbin; an E-shaped second core of ferrite of a high-voltage side disposed in o... | 12/05/1989 |
| 4858095 | Magnetron drive apparatus In a magnetron drive apparatus a high frequency voltage converted and outputted by a frequency converter is inputted to a primary winding of a transformer and a high voltage power outputted from a secondary winding of the transformer is rectified and supp... | 08/15/1989 |
| 4827097 | Continuous transformer and motor A combined transformer and motor having a continuously energized primary winding producing a continuous output voltage from a transformer winding and a selectively enabled motor shaft rotational output which is selectively actuated by powering a further p... | 05/02/1989 |
| 4812798 | Electric transformer for microwave ovens The invention provides an electric transformer for microwave ovens including a conventional magnetic circuit with three columns, and electric circuits insulated by carcases and covers made from an insulating material. The secondary carcase forms a particu... | 03/14/1989 |
| 4812607 | Compensation for improved continuous transformer and motor A combined transformer and motor is disclosed having a continuously energized primary winding producing a continuous output voltage from a transformer winding and a selectively enabled motor shaft rotational output which is selectively actuated by powerin... | 03/14/1989 |
| 4801775 | Shading band compensation for continuous transformer and motor A combined transformer and motor having a continuously energized primary winding producing a continuous output voltage from a transformer winding and a selectively enabled motor shaft rotational output which is selectively actuated by powering a further p... | 01/31/1989 |
| 4801776 | Flux reduction compensation for continuous transformer and motor A combined transformer and motor having a continuously energized primary winding producing a continuous output voltage from a transformer winding and a selectively enabled motor shaft rotational output which is selectively actuated by powering a further p... | 01/31/1989 |
| 4757171 | Continuous transformer and motor A combined transformer and motor having a continuously energized primary winding producing a continuous output voltage from a transformer winding and a selectively enabled motor shaft rotational output which is selectively actuated by powering a further p... | 07/12/1988 |
