Patent application number | Description | Published |
20080272115 | High-Frequency Heating Apparatus - A purpose of the present invention is to provide an inverter circuit capable of suppressing an overshooting phenomenon of an input current at an instantaneous time when an initiating operation of the inverter circuit is switched to the normal operation thereof, and thus, capable of preventing damages of IGBTs and a magnetron. | 11-06-2008 |
20090001073 | High-Frequency Heating Apparatus - A resonance type high frequency heating apparatus comprising; a direct current power supply; a series connection circuit consisting of a pair of semiconductor switching elements connected in parallel to the direct current power supply; another series connection circuit having a primary coil of a leakage transformer and a capacitor connected to both ends of one of the pair of semiconductor switching elements; and a drive means for driving each of the pair of semiconductor switching elements; wherein a variable dead time preparation circuit is provided in the drive means, and the variable dead time preparation circuit enables dead time to remain constant at below a predetermined frequency and causes the dead time to increase sharply at a point above a predetermined frequency. | 01-01-2009 |
20090001074 | High-Frequency Heating Device - To attain a more reliable prevention of an electric shock by checking whether the earth states for two circuit boards are good. There is detected a voltage generated at an anode current sensing resistor | 01-01-2009 |
20090014442 | MAGNETRON DRIVING POWER SOURCE - A magnetron driving power source can detect the abnormal condition during no-load running with low cost and space saving. The magnetron driving power source includes a high voltage transformer ( | 01-15-2009 |
20090079353 | MAGNETRON DRIVE POWER SUPPLY - An object of the invention is to provide a magnetron drive power supply for performing stable inverter operation and good in development efficiency. | 03-26-2009 |
20090134153 | POWER SUPPLY FOR A HIGH FREQUENCY HEATING - It is an object of the present invention to provide a power supply for a high frequency heating that suppresses an over-shoot of an input current generated under an unstable state immediately after a magnetron begins oscillating. | 05-28-2009 |
20090206073 | INVERTER CONTROLLER AND HIGH-FREQUENCY DIELECTRIC HEATING APPARATUS - Occurrence of a defect of the moding phenomenon, etc., accompanying rise in output of a magnetron after power down control is prevented and the reliability of a high-voltage dielectric heating apparatus is further improved. After power down control, when the temperature of a thermistor T | 08-20-2009 |
20090272735 | POWER CONTROL UNIT FOR HIGH-FREQUENCY DIELECTRIC HEATING AND CONTROL METHOD THEREOF - A power control unit for a high-frequency dielectric heating not affected by variations in the magnetron type or characteristic, and power supply voltage fluctuation, etc., is provided. The power control unit for a high-frequency dielectric heating has an input current detection section | 11-05-2009 |
20090283518 | HIGH FREQUENCY HEATING APPARATUS - The present invention is related to a high frequency heating apparatus for driving a magnetron such as a microwave oven, and has an object to provide a frequency modulating system capable of reducing power supply higher harmonic distortion of higher orders which are produced at phases in the vicinity of 0 degree and 180 degrees where an instantaneous voltage of a commercial power supply becomes the lowest voltage. | 11-19-2009 |
20090289056 | POWER CONTROL APPARATUS FOR HIGH-FREQUENCY DIELECTRIC HEATING AND POWER CONTROL METHOD FOR THE SAME - A power control unit for high-frequency dielectric heating not affected by variations in the types or the characteristics of magnetrons, power supply voltage fluctuation, etc., is provided. | 11-26-2009 |
20100065553 | POWER CONTROL APPARATUS FOR HIGH-FREQUENCY DIELECTRIC HEATING AND POWER CONTROL METHOD FOR THE SAME - A power control unit for high-frequency dielectric heating not affected by variations in the types or the characteristics of magnetrons, power supply voltage fluctuation, etc., is provided. | 03-18-2010 |
20100065554 | POWER CONTROL APPARATUS FOR HIGH-FREQUENCY DIELECTRIC HEATING AND POWER CONTROL METHOD FOR THE SAME - A power control unit for high-frequency dielectric heating not affected by variations in the types or the characteristics of magnetrons, power supply voltage fluctuation, etc., is provided. | 03-18-2010 |
20100089908 | POWER CONTROL APPARATUS FOR HIGH-FREQUENCY DIELECTRIC HEATING AND POWER CONTROL METHOD FOR THE SAME - A power control unit for high-frequency dielectric heating not affected by variations in the types or the characteristics of magnetrons, power supply voltage fluctuation, etc., is provided. | 04-15-2010 |
20100102796 | STATE DETECTION DEVICE FOR DETECTING OPERATION STATE OF HIGH-FREQUENCY HEATING APPARATUS - An operating state detection technique is provided which makes it possible to accurately detect an abnormality of a high-frequency heating apparatus. An anode current detected by the anode current detection resistor | 04-29-2010 |
20100102797 | STATE DETECTION DEVICE FOR DETECTING OPERATION STATE OF HIGH-FREQUENCY HEATING APPARATUS - An operating state detection technique is provided which makes it possible to accurately detect an abnormality of a high-frequency heating apparatus. An anode current detected by the anode current detection resistor | 04-29-2010 |
20100155393 | POWER CONTROL UNIT FOR HIGH-FREQUENCY DIELECTRIC HEATING AND CONTROL METHOD THEREOF - A power control unit for a high-frequency dielectric heating not affected by variations in the magnetron type or characteristic, and power supply voltage fluctuation, etc., is provided. The power control unit for a high-frequency dielectric heating has an input current detection section | 06-24-2010 |
20100155394 | POWER CONTROL UNIT FOR HIGH-FREQUENCY DIELECTRIC HEATING AND CONTROL METHOD THEREOF - A power control unit for a high-frequency dielectric heating not affected by variations in the magnetron type or characteristic, and power supply voltage fluctuation, etc., is provided. The power control unit for a high-frequency dielectric heating has an input current detection section | 06-24-2010 |
20100155395 | POWER CONTROL UNIT FOR HIGH-FREQUENCY DIELECTRIC HEATING AND CONTROL METHOD THEREOF - A power control unit for a high-frequency dielectric heating not affected by variations in the magnetron type or characteristic, and power supply voltage fluctuation, etc., is provided. The power control unit for a high-frequency dielectric heating has an input current detection section | 06-24-2010 |
20110290791 | HIGH-FREQUENCY HEATING DEVICE - To provide a high-frequency heating device of which reduction of weight and cost can be achieved, while a leakage of high-frequency waves is prevented. A high-frequency heating device 10 includes a switch unit 17 which is provided between a heating chamber and a machine chamber inside a casing 11, at a corner of an opening of the heating chamber remote from a hinge, and pressed with pins 18, 19 which are provided on a door 14, when the door 14 closes the opening, a door arm which is provided in the casing 11 at a diagonal position of the opening with respect to a position of arranging the switch unit 17, and bridged between the casing 11 and the door 14 thereby to draw the door 14 to the casing 11, when the opening of the heating chamber is closed with the door 14, a protruding portion 42 provided on the pin 19 and protruding in a direction intersecting a longitudinal direction of the pin 19, and a rack unit 23 which is arranged between a wall member 21 of the casing 11 and the switch unit 17, urged toward an opposite side to the protruding direction of the protruding portion 42, and adapted to move in the protruding direction of the protruding portion 42, when the rack unit is pressed with the protruding portion 42. | 12-01-2011 |