Patents by Inventor Kenzo Danjo
Kenzo Danjo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8664566Abstract: An arc welding apparatus includes a main power supply circuit for outputting an arc current, a control circuit for controlling the main power supply circuit, and a high-frequency voltage generating circuit for generating a high-frequency voltage. When an operation switch is turned on for a first time since the apparatus is powered on, the control circuit activates the main power supply circuit to output a high voltage, and the high-frequency voltage generating circuit to generate a high-frequency voltage. With the high voltage superimposed on the high-frequency voltage, the control circuit passes a welding arc current through a torch and a base material. The switch is then turned off, and the control circuit passes a pilot arc current through the torch and the base material. The switch is turned on again, and the control circuit activates the main power supply circuit to output a high voltage, thereby allowing smooth arc transition.Type: GrantFiled: June 7, 2006Date of Patent: March 4, 2014Assignee: Sansha Electric Manufacturing Co., Ltd.Inventors: Hideo Ishii, Tetsuro Ikeda, Kenzo Danjo, Atsushi Kinoshita
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Patent number: 7902464Abstract: A printed circuit board (120) includes an insulating substrate (120a) on which conductive films (120b) are formed. Semiconductor devices (8) disposed external to the printed circuit board (120) have their leads (24a, 24b, 24c) connected to the conductive films. A flexible portion (30) is formed in the insulating substrate (120a) at a location near the location where the leads (24a, 24b, 24c) are connected to the conductive films (120b).Type: GrantFiled: June 1, 2009Date of Patent: March 8, 2011Assignee: Sansha Electric Manufacturing Company, LimitedInventors: Kenzo Danjo, Hideo Ishii, Masao Katooka, Shuji Yokoyama
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Patent number: 7808186Abstract: An output of a rectifying circuit (6), which rectifies commercial AC power, is supplied to an inverter (12) through a power factor correction circuit (8). The output of the inverter (12) is voltage-transformed in a transformer (16), rectified in a rectifying circuit (18) and is applied to a xenon lamp (2). A secondary winding (22s) of a transformer (22) of an igniter (20) is connected between the rectifying circuit (18) and the xenon lamp (2) in order to generate an arc in the xenon lamp (2). A pulse generator provides a pulse for a short time period to a primary winding (22p) of the transformer (22). An auxiliary power supply (26) supplies arc-sustaining current prepared based on the commercial AC power to the junction of the rectifying circuit (18) and the secondary winding (22s) of the transformer (22).Type: GrantFiled: May 14, 2008Date of Patent: October 5, 2010Assignee: Sansha Electric Manufacturing Company, LimitedInventors: Kenzo Danjo, Takashi Tsujii, Hiroki Morimoto
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Patent number: 7786682Abstract: Lighting of a discharge lamp is controlled in a manner to reduce deterioration of the discharge lamp subjected to high temperature and extend the lifetime of the discharge lamp. A method for controlling lighting of the discharge lamp includes a first constant current control process (period T1, which corresponds to steps S3 and S4) in which constant current control is executed by supplying a first current to the discharge lamp, a second constant current control process (period T3, which corresponds to steps S7 and S8) in which constant current control is executed by supplying a second current greater than the first current to the discharge lamp after the first constant current control process, and a constant power control process (period T4) in which constant power control is executed after the second constant current control process.Type: GrantFiled: June 13, 2008Date of Patent: August 31, 2010Assignee: Sansha Electric Manufacturing Co., Ltd.Inventors: Tetsuro Ikeda, Kenzo Danjo, Hiroki Morimoto
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Patent number: 7599197Abstract: A rectifying circuit (18) converts inputted AC power to DC power. An inverter circuit (22) converts the DC power to high-frequency power in accordance with a switching control signal applied thereto from a control circuit (50). A voltage transformer (24) voltage-transforms the voltage of the high-frequency power. An output-side rectifying circuit (40) rectifies the voltage-transformed power. An output detecting circuit (34) detects the magnitude of the voltage of the rectified power, and a signal representative of the detected voltage is applied to the control circuit (50). The control circuit (50) generates such a switching control signal as to make the rectified power have a predetermined value. The value of the voltage from the rectifying circuit (18) is detected by an input detecting circuit (62), and a signal representative of the detected voltage is applied to the control circuit (50).Type: GrantFiled: February 13, 2007Date of Patent: October 6, 2009Assignee: Sansha Electric Manufacturing Company, LimitedInventors: Hideo Ishii, Tetsuro Ikeda, Kenzo Danjo
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Publication number: 20090237898Abstract: A printed circuit board (120) includes an insulating substrate (120a) on which conductive films (120b) are formed. Semiconductor devices (8) disposed external to the printed circuit board (120) have their leads (24a, 24b, 24c) connected to the conductive films. A flexible portion (30) is formed in the insulating substrate (120a) at a location near the location where the leads (24a, 24b, 24c) are connected to the conductive films (120b).Type: ApplicationFiled: June 1, 2009Publication date: September 24, 2009Applicant: SANSHA ELECTRIC MANUFACTURING COMPANY, LIMITEDInventors: Kenzo Danjo, Hideo Ishii, Masao Katooka, Shuji Yokoyama
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Patent number: 7579554Abstract: A printed circuit board (120) includes an insulating substrate (120a) on which conductive films (120b) are formed. Semiconductor devices (8) disposed external to the printed circuit board (120) have their leads (24a, 24b, 24c) connected to the conductive films. A flexible portion (30) is formed in the insulating substrate (120a) at a location near the location where the leads (24a, 24b, 24c) are connected to the conductive films (120b).Type: GrantFiled: May 22, 2006Date of Patent: August 25, 2009Assignee: Sansha Electric Manufacturing Company LimitedInventors: Kenzo Danjo, Hideo Isii, Masao Katooka, Shuji Yokoyama
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Publication number: 20090190378Abstract: The power supply device of the present invention which outputs pulsed electrical current includes an inverter which converts an input voltage to high frequency AC, a rectifier which rectifies the output of the inverter and converts it to DC, and an output polarity changeover unit which, via a reactor, alternatingly turns ON and OFF the output at a positive electrode side of the rectifier and the output at a negative electrode side thereof. Moreover, this power supply device includes a current transformer including a closed magnetic circuit or coil, pierced by a first output current line in which the current at the positive electrode flows, and by a second output current line in which the current at the negative electrode flows. The directions of piercing of the output current lines through the current transformer are set so that the directions in the current transformer, in which current flows in the first and second output current lines, are the same.Type: ApplicationFiled: January 29, 2008Publication date: July 30, 2009Inventors: Hideo Ishii, Tetsuro Ikeda, Kenzo Danjo
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Patent number: 7528345Abstract: A welder power supply apparatus (10) includes an inverter (20), which is driven intermittently when an electrode (34) and a workpiece (36) are separated from each other and no arc is being generated between them, whereby power loss generated in the inverter (20) when the inverter (20) is driven in the non-load state of the power supply apparatus and power loss caused by exciting current flowing through an transformer (24) disposed in the output of the inverter (20) can be reduced. The inverter (20) is driven continuously when output current (Io) becomes higher than a threshold value (Ib) after the electrode (34) and the workpiece (36) are brought into contact with each other for starting arcing between them. In this manner, the arcing can be initiated without fail.Type: GrantFiled: July 24, 2007Date of Patent: May 5, 2009Assignee: Sansha Electric Manufacturing Company, LimitedInventors: Takeshi Morimoto, Kenzo Danjo, Tetsuro Ikeda, Hideo Ishii
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Publication number: 20080315790Abstract: Lighting of a discharge lamp is controlled in a manner to reduce deterioration of the discharge lamp subjected to high temperature and extend the lifetime of the discharge lamp. A method for controlling lighting of the discharge lamp includes a first constant current control process (period T1, which corresponds to steps S3 and S4) in which constant current control is executed by supplying a first current to the discharge lamp, a second constant current control process (period T3, which corresponds to steps S7 and S8) in which constant current control is executed by supplying a second current greater than the first current to the discharge lamp after the first constant current control process, and a constant power control process (period T4) in which constant power control is executed after the second constant current control process.Type: ApplicationFiled: June 13, 2008Publication date: December 25, 2008Applicant: SANSHA ELECTRIC MANUFACTURING CO., LTD.Inventors: Tetsuro IKEDA, Kenzo DANJO, Hiroki MORIMOTO
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Publication number: 20080315781Abstract: The present invention is directed to realize an optimum lamp control with an inexpensive configuration in a discharge lamp light-up control apparatus. A constant current control unit controls light-up of a discharge lamp by transmitting a control signal to an inverter and includes: a storage for storing lamp characteristics of the discharge lamp; and a CPU for obtaining information indicative of a type of the discharge lamp attached, reading the lamp characteristics from the storage based on the obtained type information, and transmitting a control signal to the inverter so that an output corresponding to the read lamp characteristics are obtained.Type: ApplicationFiled: June 18, 2008Publication date: December 25, 2008Applicant: SANSHA ELECTRIC MANUFACTURING CO., LTD.Inventors: Tetsuro IKEDA, Kenzo DANJO, Hiroki MORIMOTO
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Publication number: 20080290808Abstract: An output of a rectifying circuit (6), which rectifies commercial AC power, is supplied to an inverter (12) through a power factor correction circuit (8). The output of the inverter (12) is voltage-transformed in a transformer (16), rectified in a rectifying circuit (18) and is applied to a xenon lamp (2). A secondary winding (22s) of a transformer (22) of an igniter (20) is connected between the rectifying circuit (18) and the xenon lamp (2) in order to generate an arc in the xenon lamp (2). A pulse generator provides a pulse for a short time period to a primary winding (22p) of the transformer (22). An auxiliary power supply (26) supplies arc-sustaining current prepared based on the commercial AC power to the junction of the rectifying circuit (18) and the secondary winding (22s) of the transformer (22).Type: ApplicationFiled: May 14, 2008Publication date: November 27, 2008Applicant: Sansha Electric Manufacturing Company, LimitedInventors: Kenzo Danjo, Takashi Tsujii, Hiroki Morimoto
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Patent number: 7457139Abstract: A power supply apparatus for use with arc-utilizing apparatuses includes a plurality of power supply blocks of the same capacity. Each power supply block includes an input-side rectifying circuit, an inverter, a transformer, and an output-side rectifying circuit. The inverter is controlled by a control circuit in such a manner that high-frequency current flowing the inverter or current flowing through the output-side rectifying circuit can correspond to a reference signal provided by a reference signal generator. The outputs of the output-side rectifying circuits of the power supply blocks are connected in parallel with each other. The values of the reference signals generated by the reference signal generators are made always equal by the action of equipotential lines.Type: GrantFiled: March 20, 2006Date of Patent: November 25, 2008Assignee: Sansha Electric Manufacturing Company, LimitedInventors: Hideo Isii, Tetsuro Ikeda, Kenzo Danjo, Yuji Ikejiri
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Patent number: 7388171Abstract: Welding conditions are set for a power supply apparatus for use with a welding machine, using a control panel unit (96). A memory (105) stores therein welding conditions as set through the control unit (96), and holds the set welding conditions after turning off of a main power supply switch (1) of the power supply apparatus. Upon turning on of the main power switch (1) for starting welding, the welding conditions stored and held in the memory (105) are read out and set in the power supply apparatus.Type: GrantFiled: September 16, 2005Date of Patent: June 17, 2008Assignee: Sansha Electric Manufacturing Company, LimitedInventors: Takeshi Morimoto, Kenzo Danjo, Yuji Ikejiri, Tetsuro Ikeda, Hideo Ishii
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Patent number: 7339807Abstract: One of a plurality of voltages is adapted to be applied to power supply terminals (2a, 2b, 2c). A rectifying circuit (6) rectifies the applied voltage and develops a rectified voltage between the output terminals (6a, 6b) thereof. Inverters (16a, 16b) are connected into one of a plurality of inverter connections between the rectifier output terminals (6a, 6b) in response to one of a plurality of inverter connection indicative signals. The inverter connections are set to correspond to respective ones of the plurality of voltages, so that a predetermined voltage can be applied to each inverter whichever one of the plurality of voltages is applied to the power supply terminals. An inverter connection indicative signal generating circuit (34) is manually operated to generate a desired one of the inverter connection indicative signals. A thyristor (8) is disposed between the rectifier output terminals (6a, 6b) and the inverters (16a, 16b).Type: GrantFiled: January 8, 2007Date of Patent: March 4, 2008Assignee: Sansha Electric Manufacturing Company, LimitedInventors: Masao Katooka, Tetsuro Ikeda, Kenzo Danjo, Takeshi Morimoto, Hideo Ishii
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Publication number: 20080047941Abstract: A welder power supply apparatus (10) includes an inverter (20), which is driven intermittently when an electrode (34) and a workpiece (36) are separated from each other and no arc is being generated between them, whereby power loss generated in the inverter (20) when the inverter (20) is driven in the non-load state of the power supply apparatus and power loss caused by exciting current flowing through an transformer (24) disposed in the output of the inverter (20) can be reduced. The inverter (20) is driven continuously when output current (Io) becomes higher than a threshold value (Ib) after the electrode (34) and the workpiece (36) are brought into contact with each other for starting arcing between them.Type: ApplicationFiled: July 24, 2007Publication date: February 28, 2008Applicant: SANSHA ELECTRIC MANUFACTURING COMPANY, LIMITEDInventors: Takeshi Morimoto, Kenzo Danjo, Tetsuro Ikeda, Hideo Ishii
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Publication number: 20070284349Abstract: An arc welding apparatus includes a main power supply circuit for outputting an arc current, a control circuit for controlling the main power supply circuit, and a high-frequency voltage generating circuit for generating a high-frequency voltage. When an operation switch is turned on for a first time since the apparatus is powered on, the control circuit activates the main power supply circuit to output a high voltage, and the high-frequency voltage generating circuit to generate a high-frequency voltage. With the high voltage superimposed on the high-frequency voltage, the control circuit passes a welding arc current through a torch and a base material. The switch is then turned off, and the control circuit passes a pilot arc current through the torch and the base material. The switch is turned on again, and the control circuit activates the main power supply circuit to output a high voltage, thereby allowing smooth arc transition.Type: ApplicationFiled: June 7, 2006Publication date: December 13, 2007Inventors: Hideo Ishii, Tetsuro Ikeda, Kenzo Danjo, Atsushi Kinoshita
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Publication number: 20070217231Abstract: A power supply apparatus for use with arc-utilizing apparatuses includes a plurality of power supply blocks (2a, 2b) of the same capacity. Each power supply block (2a, 2b) includes an input-side rectifying circuit (4a, 4b), an inverter (10a, 10b), a transformer (12a, 12b), and an output-side rectifying circuit (18a, 18b). The inverter (10a, 10b) is controlled by a control circuit (30a, 30b) in such a manner that high-frequency current flowing the inverter (10a, 10b) or current flowing through the output-side rectifying circuit (18a, 18b) can correspond to a reference signal provided by a reference signal generator (34a, 34b). The outputs of the output-side rectifying circuits (18a, 18b) of the power supply blocks are connected in parallel with each other. The values of the reference signals generated by the reference signal generators (34a, 34b) are made always equal by the action of equipotential lines (40, 42).Type: ApplicationFiled: March 20, 2006Publication date: September 20, 2007Inventors: Hideo Ishii, Tetsuro Ikeda, Kenzo Danjo, Yuji Ikejiri
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Publication number: 20070194724Abstract: A rectifying circuit (18) converts inputted AC power to DC power. An inverter circuit (22) converts the DC power to high-frequency power in accordance with a switching control signal applied thereto from a control circuit (50). A voltage transformer (24) voltage-transforms the voltage of the high-frequency power. An output-side rectifying circuit (40) rectifies the voltage-transformed power. An output detecting circuit (34) detects the magnitude of the voltage of the rectified power, and a signal representative of the detected voltage is applied to the control circuit (50). The control circuit (50) generates such a switching control signal as to make the rectified power have a predetermined value. The value of the voltage from the rectifying circuit (18) is detected by an input detecting circuit (62), and a signal representative of the detected voltage is applied to the control circuit (50).Type: ApplicationFiled: February 13, 2007Publication date: August 23, 2007Inventors: Hideo Ishii, Tetsuro Ikeda, Kenzo Danjo
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Publication number: 20070165433Abstract: One of a plurality of voltages is adapted to be applied to power supply terminals (2a, 2b, 2c). A rectifying circuit (6) rectifies the applied voltage and develops a rectified voltage between the output terminals (6a, 6b) thereof. Inverters (16a, 16b) are connected into one of a plurality of inverter connections between the rectifier output terminals (6a, 6b) in response to one of a plurality of inverter connection indicative signals. The inverter connections are set to correspond to respective ones of the plurality of voltages, so that a predetermined voltage can be applied to each inverter whichever one of the plurality of voltages is applied to the power supply terminals. An inverter connection indicative signal generating circuit (34) is manually operated to generate a desired one of the inverter connection indicative signals. A thyristor (8) is disposed between the rectifier output terminals (6a, 6b) and the inverters (16a, 16b).Type: ApplicationFiled: January 8, 2007Publication date: July 19, 2007Inventors: Masao Katooka, Tetsuro Ikeda, Kenzo Danjo, Takeshi Morimoto, Hideo Ishii