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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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4667075 |
Microwave oven for vehicles
A microwave oven for a camping or other vehicle includes a heating room in which an object is heating by applying microwaves thereto, a microwave guide to propagate the microwaves into the heating...
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4620078 |
Power control circuit for magnetron
A duty cycle power control circuit for a magnetron including a power transformer having a primary winding, a secondary anode winding for supplying anode voltage to the magnetron and a secondary...
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4593167 |
Electronic microwave oven power supply
A power supply for a magnetron is adapted to be powered from a regular power line and comprises an inverter means operable to provide an AC voltage of relatively high frequency. This relatively...
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4223195 |
Pulse transformer
A pulse transformer is provided for triggering a magnetron in a microwave oven from a low level d.c. control signal. A step-up transformer has a secondary connected to a magnetron triac and a...
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4142082 |
High frequency power supply microwave oven
A microwave oven having a magnetron wave energy supply energized by high voltage pulses at a superaudible frequency wherein the voltage pulses are produced by a decreasing portion of a magnetic...
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4017702 |
Microwave oven including apparatus for varying power level
Apparatus for varying microwave power level is included in a microwave oven. The microwave oven includes a magnetron for producing microwaves used for heating and a half-wave voltage doubler for...
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3902099 |
Energizing circuit for magnetron using parallel transformers
A magnetron energizing circuit uses two transformers of the high leakage reactance type having isolated secondaries with an end terminal of each secondary connected to a common point. The...
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3873883 |
Positive ignition power supply for a magnetron
A power supply for a magnetron which provides a microwave output and has an anode, a cathode, and a filament circuit. The magnetron has proper and improper modes of oscillation. The supply includes...
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3840810 |
HIGH FREQUENCY ENERGY GENERATOR LOAD SIMULATOR CIRCUIT
A circuit is disclosed including semiconductor devices simulates the characteristic load for high frequency energy generators, such as magnetrons, under actual operating conditions in high voltage...
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3671847 |
POWER SUPPLY FOR DRIVING MAGNETRON
A compact power supply for driving a magnetron to oscillation used for an electronic cooking range. A transformer having a three-legged magnetic core with at least primary, secondary and tertiary...
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3584288 |
TRANSFORMER POWER SUPPLY FOR MICROWAVE GENERATORS
Two ferroresonant transformers are provided to apply power to a magnetron, and each is adapted to resonate to provide half the power to the magnetron. The primary windings are connected in parallel...
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3546483 |
CONTROL CIRCUITRY FOR A TRANSFORMER SUPPLIED UNIDIRECTIONALLY-CONDUCTIVE LOAD
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3514566 |
ADJUSTABLE VOLTAGE TRANSFORMER FOR MICROWAVE OVEN APPARATUS
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3398371 |
Surge relay circuit
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