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 |
20090065502 | POWER CONTROL METHOD OF HIGH FREQUENCY DIELECTRIC HEATING AND APPARATUS THEREOF - The object of the invention is not only to simplify the structure of a high frequency dielectric heating power control apparatus and reduce the size of the apparatus but also to eliminate the need for control and design corresponding to the kind of a magnetron and thus enhance the running efficiency of the apparatus. | 03-12-2009 |
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 |
20120262951 | POWER CONVERTER HAVING SEMICONDUCTOR SWITCHING ELEMENT - Provided is a configuration in which it is possible to mount an applied voltage suppression circuit configured to prevent voltage breakdown of a semiconductor switching element, and a set voltage thereof can be inspected without damaging an IC or the like of a peripheral circuit. In a power converter having a semiconductor switching element, an applied voltage suppression circuit configured to suppress a voltage applied to the semiconductor switching element and at least one component of constituent components of a driving circuit which causes the semiconductor switching element to be turned off if the component is absent are transferred to and disposed on a slave substrate (separate unit) which is divided from and electrically connected to a master substrate including the semiconductor switching element, the driving circuit, a control circuit, and the like mounted thereon. | 10-18-2012 |
20120281445 | TRANSFORMER UNIT - A transformer unit includes: a transformer which is mounted on a printed board, and which includes a bobbin around which at least a primary winding and a secondary winding are wound and a core which is inserted into a center of the bobbin; and a component holding portion configured to hold a component at an outer peripheral portion except for a mount side to be mounted on the printed board. The transformer unit further includes a voltage doubler rectifying circuit which is provided at the component holding portion and which is configured to rectify a high-frequency high voltage applied from the secondary winding. The secondary winding is connected to a lead terminal of a high-voltage component constituting the voltage doubler rectifying circuit via tension absorbing means provided at the bobbin. | 11-08-2012 |