Patents by Inventor Kenichi Onda
Kenichi Onda 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: 7157810Abstract: The present invention reduces the capacity of the AC-DC converter for the peak load and realizes low price and reduction in the volume of the power unit. The apparatus built-in backup power supply has the peak cut function for sharing a part of the load current at the time of peak load from the secondary battery. The two-way DC-DC converter 5 and the secondary battery 4 are installed on the DC output side of the AC-DC converter 3 and a current larger than a predetermined peak cut level is discharged from the secondary battery 4 at the time of peak load. Further, when the load is less than the predetermined cut level, the secondary battery 4 is charged from the AC-DC converter 3 via the two-way DC-DC converter 5. Furthermore, a most suitable peak cut level according to the SOC of the secondary battery and load pattern is automatically set and dynamically changed.Type: GrantFiled: January 12, 2004Date of Patent: January 2, 2007Assignees: Hitachi, Ltd., Hitachi Maxell, Ltd., Hitachi Computer Peripherals Co., Ltd.Inventors: Akihiko Kanouda, Satoru Masuyama, Masato Isogai, Ryouhei Saga, Kenichi Onda, Norikazu Tokunaga
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Patent number: 7158392Abstract: It is aimed at decreasing losses not only in a synchronous rectifier circuit provided at a secondary side of a DC-DC converter, but also in a full-bridge switching circuit provided at a primary side thereof. The DC-DC converter comprises a transformer for voltage conversion, a synchronous rectifier circuit at the secondary side, and a full-bridge switching circuit at the primary side. The DC-DC converter performs synchronous rectifier control which uses switch transistors to change paths of currents flowing through the secondary coil in synchronization with switching operations at the primary side. The DC-DC converter detects currents flowing through a load at the secondary side, primary-side currents varying with the load currents, or primary-side input voltages to dynamically control off-timings of a synchronous rectification transistor at the secondary side.Type: GrantFiled: December 5, 2003Date of Patent: January 2, 2007Assignee: Renesas Technology Corp.Inventors: Kyoichi Hosokawa, Kenichi Onda, Yoichi Uehara, Ryotaro Kudo, Shinichi Yoshida
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Patent number: 7053502Abstract: A power supply provided with: an AC/DC converter which receives AC power, converts the AC power into DC power, and outputs the DC power; a DC/DC converter which receives the DC power from the AC/DC converter, and controls a level of an output voltage of the DC/DC converter to be equal to a level of a voltage to be used by a load while the DC/DC converter supplies the output voltage to the load; a DC converter which is connected to an input of the DC/DC converter; and a DC power storage means which supplies electric power to the DC/DC converter through the DC converter.Type: GrantFiled: March 26, 2004Date of Patent: May 30, 2006Assignees: Hitachi, Ltd., Hitachi Computer Peripherals Co., Ltd.Inventors: Nobuyuki Aihara, Takeshi Onaka, Norikazu Tokunaga, Kenichi Onda, Satoru Masuyama, Shigekazu Zemba
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Patent number: 6977448Abstract: Apparatus built-in backup power supply system has a “peak cut” function for sharing a part of the load current at the time of a peak load using a secondary battery. For this purpose, a two-way DC—DC converter 5 and the secondary battery 4 are installed on the DC output side of the AC-DC converter 3, and that portion of the load current that exceeds a predetermined peak cut level is discharged from the secondary battery 4 during peak loading. When the load is less than the predetermined cut level, the secondary battery 4 is charged from the AC-DC converter 3 via the two-way DC—DC converter 5. A suitable peak cut level is determined according to the state of charge of the secondary battery and load pattern, and is changed dynamically.Type: GrantFiled: April 28, 2003Date of Patent: December 20, 2005Assignees: Hitachi, Ltd., Hitachi Maxwell, Ltd., Hitachi Computer Peripherals Co., Ltd.Inventors: Akihiko Kanouda, Satoru Masuyama, Masato Isogai, Ryouhei Saga, Kenichi Onda, Norikazu Tokunaga
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Publication number: 20050078494Abstract: A power supply provided with: an AC/DC converter which receives AC power, converts the AC power into DC power, and outputs the DC power; a DC/DC converter which receives the DC power from the AC/DC converter, and controls a level of an output voltage of the DC/DC converter to be equal to a level of a voltage to be used by a load while the DC/DC converter supplies the output voltage to the load; a DC converter which is connected to an input of the DC/DC converter; and a DC power storage means which supplies electric power to the DC/DC converter through the DC converter.Type: ApplicationFiled: March 26, 2004Publication date: April 14, 2005Inventors: Nobuyuki Aihara, Takeshi Onaka, Norikazu Tokunaga, Kenichi Onda, Satoru Masuyama, Shigekazu Zemba
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Publication number: 20050004190Abstract: To provide novel crystals useful as an ingredient for the production of a diabetes remedy. The invention is concerned with ?-form crystal and ?-form crystal of (R)-2-(2-aminothiazol-4-yl)-4?-[2-[(2-hydroxy-2-phenyleth-yl)amino]ethyl]acetanilide. The ?-form crystal does not exhibit hygroscopicity and has stability such that it can be used as a medicine, and is useful for mass synthesis in the industrial production. The ?-form crystal does not relatively exhibit hygroscopicity and is also useful as a production intermediate of the ?-form crystal.Type: ApplicationFiled: October 20, 2002Publication date: January 6, 2005Inventors: Souichirou Kawazoe, Kenichirou Sakamoto, Yuji Awamura, Tatsuya Maruyama, Takayuki Suzuki, Kenichi Onda, Toshiyuki Takasu
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Patent number: 6797706Abstract: A nitrogen-containing six-membered heterocyclic compound having substituents —X—A—R3, —N(R1)-(Ph substituted by R2), and —CONH2, a salt thereof, a prodrug thereof, and a Syk inhibitor containing the same as an active ingredient. (In the formula, A: a (substituted) lower alkylene, a (substituted) arylene, or the like; X: NR4, CONR4, NR4CO, O, or S; R1, R4: H, a lower alkyl, —CO-lower alkyl, or —SO2-lower alkyl; R2: H, a (substituted) lower alkyl, —O-lower alkyl, —S-lower alkyl, —O-aryl, nitro, cyano, or the like; R3: —CO2H, —CO2-lower alkyl, -lower alkylene-CO2H, —NH2, -alkylene-NH2 or the like.Type: GrantFiled: December 10, 2001Date of Patent: September 28, 2004Assignee: Yamanouchi Pharmaceutical Co., Ltd.Inventors: Hiroyuki Hisamichi, Souichirou Kawazoe, Kazuhito Tanabe, Atsushi Ichikawa, Akiko Orita, Takayuki Suzuki, Kenichi Onda, Makoto Takeuchi
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Patent number: 6795322Abstract: A power supply provided with: an AC/DC converter which receives AC power, converts the AC power into DC power, and outputs the DC power; a DC/DC converter which receives the DC power from the AC/DC converter, and controls a level of an output voltage of the DC/DC converter to be equal to a level of a voltage to be used by a load while the DC/DC converter supplies the output voltage to the load; a DC converter which is connected to an input of the DC/DC converter; and a DC power storage device which supplies electric power to the DC/DC converter through the DC converter.Type: GrantFiled: December 22, 1999Date of Patent: September 21, 2004Assignees: Hitachi, Ltd., Hitachi Computer Peripherals Co., Ltd.Inventors: Nobuyuki Aihara, Takeshi Onaka, Norikazu Tokunaga, Kenichi Onda, Satoru Masuyama, Shigekazu Zemba
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Publication number: 20040145926Abstract: The present invention reduces the capacity of the AC-DC converter for the peak load and realizes low price and reduction in the volume of the power unit. The apparatus built-in backup power supply has the peak cut function for sharing a part of the load current at the time of peak load from the secondary battery. The two-way DC-DC converter 5 and the secondary battery 4 are installed on the DC output side of the AC-DC converter 3 and a current larger than a predetermined peak cut level is discharged from the secondary battery 4 at the time of peak load. Further, when the load is less than the predetermined cut level, the secondary battery 4 is charged from the AC-DC converter 3 via the two-way DC-DC converter 5. Furthermore, a most suitable peak cut level according to the SOC of the secondary battery and load pattern is automatically set and dynamically changed.Type: ApplicationFiled: January 12, 2004Publication date: July 29, 2004Inventors: Akihiko Kanouda, Satoru Masuyama, Masato Isogai, Ryouhei Saga, Kenichi Onda, Norikazu Tokunaga
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Publication number: 20040136209Abstract: It is aimed at decreasing losses not only in a synchronous rectifier circuit provided at a secondary side of a DC-DC converter, but also in a full-bridge switching circuit provided at a primary side thereof. The DC-DC converter comprises a transformer for voltage conversion, a synchronous rectifier circuit at the secondary side, and a full-bridge switching circuit at the primary side. The DC-DC converter performs synchronous rectifier control which uses switch transistors to change paths of currents flowing through the secondary coil in synchronization with switching operations at the primary side. The DC-DC converter detects currents flowing through a load at the secondary side, primary-side currents varying with the load currents, or primary-side input voltages to dynamically control off-timings of a synchronous rectification transistor at the secondary side.Type: ApplicationFiled: December 5, 2003Publication date: July 15, 2004Applicant: Renesas Technology Corp.Inventors: Kyoichi Hosokawa, Kenichi Onda, Yoichi Uehara, Ryotaro Kudo, Shinichi Yoshida
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Patent number: 6643152Abstract: A DC power supply device comprises an AC/DC converter 1, a DC/DC converter 2, and a DC converter 3 converting DC power from a battery 4 to DC voltage for connecting to output terminals of the AC/DC converter. The DC power supply device is provided with a controlling circuit 100 which observes a charging control level and a load sharing level, impresses a charging command on a UPS controlling part controlling the DC converter, and simultaneously provides a PFC controlling part controlling the AC/DC converter with a current command when a voltage level is less than the charging control level, stops only the charging command when the voltage level is more than the charging level and less than the load sharing level, and provides the UPS controlling part and the PFC controlling part with current commands when the voltage level is more than the load sharing level.Type: GrantFiled: November 13, 2002Date of Patent: November 4, 2003Assignees: Hitachi, Ltd., Hitachi Computer Peripherals Co., Ltd., Hitachi Tohbu Semiconductor, Ltd.Inventors: Norikazu Tokunaga, Kenichi Onda, Takeshi Onaka, Satoru Masuyama, Ryouhei Saga, Katsunori Hayashi
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Publication number: 20030197494Abstract: A DC-DC converter of low ripple voltages which has a bi-directional power conversion means between an input power source and a smoothing capacitor and can quickly change the output voltage independently of the load. Said DC-DC converter comprises a main circuit of a non-insulated step-down DC-DC converter comprising at least two semiconductor elements, a DC reactor, and a smoothing capacitor, means for generating a variable reference voltage, means for comparing a reference voltage generated by said reference voltage generating means by the output voltage and outputting differential voltage information, means for generating a signal to be applied to the control terminals of said semiconductor element according to said differential voltage information, and means for discriminating the direction of a current flowing through said DC reactor.Type: ApplicationFiled: May 2, 2003Publication date: October 23, 2003Applicant: Hitachi, Ltd.Inventors: Akihiko Kanouda, Kenichi Onda, Norikazu Tokunaga, Ryouhei Saga, Kyoichi Hosokawa
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Publication number: 20030184937Abstract: The present invention reduces the capacity of the AC-DC converter for the peak load and realizes low price and reduction in the volume of the power unit. The apparatus built-in backup power supply has the peak cut function for sharing a part of the load current at the time of peak load from the secondary battery. The two-way DC-DC converter 5 and the secondary battery 4 are installed on the DC output side of the AC-DC converter 3 and a current larger than a predetermined peak cut level is discharged from the secondary battery 4 at the time of peak load. Further, when the load is less than the predetermined cut level, the secondary battery 4 is charged from the AC-DC converter 3 via the two-way DC-DC converter 5. Furthermore, a most suitable peak cut level according to the SOC of the secondary battery and load pattern is automatically set and dynamically changed.Type: ApplicationFiled: April 28, 2003Publication date: October 2, 2003Applicants: Hitachi, Ltd., Hitachi Maxell, Ltd., Hitachi Computer Peripherals Co., Ltd.Inventors: Akihiko Kanouda, Satoru Masuyama, Masato Isogai, Ryouhei Saga, Kenichi Onda, Norikazu Tokunaga
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Patent number: 6603671Abstract: A DC-DC converter is provided with a calculation circuit which estimates current flowing through a reactor in a control circuit for controlling a switching element and a circulation use element, and the switching element and the circulation use element are controlled by making use of the calculated reactor current value. Thereby, a DC-DC converter which operates in a high efficiency and with low ripple even during a light load condition and realizes a high response performance during load variation is provided.Type: GrantFiled: November 30, 2001Date of Patent: August 5, 2003Assignee: Hitachi, Ltd.Inventors: Norikazu Tokunaga, Kenichi Onda, Takeshi Onaka, Ryouhei Saga, Akihiko Kanouda
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Patent number: 6580597Abstract: A voltage regulator module includes a power supply circuit for supplying power to an integrated circuit, the power supply circuit including semiconductor switching devices and a drive circuit for driving the semiconductor switching devices; and charge storage means for smoothing an output of the power supply circuit, wherein charge storage unit having a smoothing capacitor includes an electric double-layer capacitor, wherein the electric double-layer capacitor includes a plurality of positive electrode terminals and a plurality of negative electrode terminals, and wherein the plurality of positive electrode terminals and the plurality of negative electrode terminals are disposed on a surface identical to a surface of the electric double-layer capacitor.Type: GrantFiled: March 19, 2002Date of Patent: June 17, 2003Assignee: Hitachi, Ltd.Inventors: Akihiko Kanouda, Kenichi Onda, Norikazu Tokunaga, Mikiya Nohara, Ryouhei Saga, Morinobu Endo
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Publication number: 20030107906Abstract: A DC power supply device comprises an AC/DC converter 1, a DC/DC converter 2, and a DC converter 3 converting DC power from a battery 4 to DC voltage for connecting to output terminals of the AC/DC converter. The DC power supply device is provided with a controlling circuit 100 which observes a charging control level and a load sharing level, impresses a charging command on a UPS controlling part controlling the DC converter, and simultaneously provides a PFC controlling part controlling the AC/DC converter with a current command when a voltage level is less than the charging control level, stops only the charging command when the voltage level is more than the charging level and less than the load sharing level, and provides the UPS controlling part and the PFC controlling part with current commands when the voltage level is more than the load sharing level.Type: ApplicationFiled: November 13, 2002Publication date: June 12, 2003Applicants: Hitachi, Ltd., Hitachi Computer Peripherals Co., Ltd., Hitachi Tohbu Semiconductor, Ltd.Inventors: Norikazu Tokunaga, Kenichi Onda, Takeshi Onaka, Satoru Masuyama, Ryouhei Saga, Katsunori Hayashi
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Patent number: 6567261Abstract: A voltage regulator module includes a power supply circuit for supplying power to an integrated circuit, the power supply circuit including semiconductor switching devices and a drive circuit for driving the semiconductor switching devices; and charge storage means for smoothing an output of the power supply circuit, wherein charge storage unit having a smoothing capacitor includes an electric double-layer capacitor, wherein the electric double-layer capacitor includes a plurality of positive electrodes terminals and a plurality of negative electrode terminals, and wherein the plurality of positive electrode terminals and the plurality of negative electrode terminals are disposed on a surface identical to a surface of the electric double-layer capacitor.Type: GrantFiled: August 7, 2002Date of Patent: May 20, 2003Assignee: Hitachi, Ltd.Inventors: Akihiko Kanouda, Kenichi Onda, Norikazu Tokunaga, Mikiya Nohara, Ryouhei Saga, Morinobu Endo
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Publication number: 20030042878Abstract: A voltage regulator module includes a power supply circuit for supplying power to an integrated circuit, the power supply circuit including semiconductor switching devices and a drive circuit for driving the semiconductor switching devices; and charge storage means for smoothing an output of the power supply circuit, wherein charge storage unit having a smoothing capacitor includes an electric double-layer capacitor, wherein the electric double-layer capacitor includes a plurality of positive electrode terminals and a plurality of negative electrode terminals, and wherein the plurality of positive electrode terminals and the plurality of negative electrode terminals are disposed on a surface identical to a surface of the electric double-layer capacitor.Type: ApplicationFiled: March 19, 2002Publication date: March 6, 2003Inventors: Akihiko Kanouda, Kenichi Onda, Norikazu Tokunaga, Mikiya Nohara, Ryouhei Saga, Morinobu Endo
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Publication number: 20030039092Abstract: A voltage regulator module includes a power supply circuit for supplying power to an integrated circuit, the power supply circuit including semiconductor switching devices and a drive circuit for driving the semiconductor switching devices; and charge storage means for smoothing an output of the power supply circuit, wherein charge storage unit having a smoothing capacitor includes an electric double-layer capacitor, wherein the electric double-layer capacitor includes a plurality of positive electrode terminals and a plurality of negative electrode terminals, and wherein the plurality of positive electrode terminals and the plurality of negative electrode terminals are disposed on a surface identical to a surface of the electric double-layer capacitor.Type: ApplicationFiled: August 7, 2002Publication date: February 27, 2003Applicant: HITACHI, LTD.Inventors: Akihiko Kanouda, Kenichi Onda, Norikazu Tokunaga, Mikiya Nohara, Ryouhei Saga, Morinobu Endo
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Patent number: 6507507Abstract: A DC power supply device comprises an AC/DC converter 1, a DC/DC converter 2, and a DC converter 3 converting DC power from a battery 4 to DC voltage for connecting to output terminals of the AC/DC converter. The DC power supply device is provided with a controlling circuit 100 which observes a charging control level and a load sharing level, impresses a charging command on a UPS controlling part controlling the DC converter, and simultaneously provides a PFC controlling part controlling the AC/DC converter with a current command when a voltage level is less than the charging control level, stops only the charging command when the voltage level is more than the charging level and less than the load sharing level, and provides the UPS controlling part and the PFC controlling part with current commands when the voltage level is more than the load sharing level.Type: GrantFiled: October 31, 2001Date of Patent: January 14, 2003Assignees: Hitachi, Ltd., Hitachi Computer Peripherals Co., Ltd., Hitachi Tohbu Semiconductor, Ltd.Inventors: Norikazu Tokunaga, Kenichi Onda, Takeshi Onaka, Satoru Masuyama, Ryouhei Saga, Katsunori Hayashi