Patents by Inventor Hisaaki WATANABE
Hisaaki WATANABE 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).
-
Patent number: 11442426Abstract: According to semiconductor device includes a domain converter for converting a digitized resolver signal from a time-domain to a frequency-domain, a spectrum analyzer for analyzing a spectrum of the resolver signal converted to a frequency-domain by the domain converter, and an error detector for detecting an error related to the resolver signal based on an output signal from the spectrum analyzer.Type: GrantFiled: March 25, 2020Date of Patent: September 13, 2022Assignee: RENESAS ELECTRONICS CORPORATIONInventors: Yutaka Oshima, Hisaaki Watanabe
-
Publication number: 20200341447Abstract: According to semiconductor device includes a domain converter for converting a digitized resolver signal from a time-domain to a frequency-domain, a spectrum analyzer for analyzing a spectrum of the resolver signal converted to a frequency-domain by the domain converter, and an error detector for detecting an error related to the resolver signal based on an output signal from the spectrum analyzer.Type: ApplicationFiled: March 25, 2020Publication date: October 29, 2020Inventors: Yutaka OSHIMA, Hisaaki WATANABE
-
Patent number: 10797623Abstract: The conventional semiconductor device requires use of a separate vibration sensor or the like to detect a rotation abnormality of a motor. According to an embodiment, a semiconductor device includes: a resolver rotation angle conversion circuit that obtains a rotation angle signal indicative of a rotation angle of the motor obtained from a resolver that measures the rotation angle of the motor and generates rotation angle information by converting the rotation angle signal to a digital value; a motor rotation angle conversion circuit that generates rotation angle temporal change information by converting the rotation angle information with respect to each phase of the motor to an angular change of the motor; and a determination circuit that determines that an abnormality occurs in the motor in a case of exceeding a fluctuation abnormality detection range of the rotation angle temporal change in the rotation angle temporal change information.Type: GrantFiled: October 31, 2018Date of Patent: October 6, 2020Assignee: RENESAS ELECTRONICS CORPORATIONInventor: Hisaaki Watanabe
-
Patent number: 10443108Abstract: A heating apparatus, a heat treatment apparatus, and a heating method are provided. The heating apparatus includes a workpiece support on which a ring-shaped workpiece is placed, a rotary drive assembly, and a heater configured to heat the workpiece. The workpiece support includes a plurality of rotating rollers arranged in a circumferential direction. The rotary drive assembly is configured to rotate the plurality of rotating rollers to rotate the workpiece placed on the workpiece support along a ring shape of the workpiece. The heater includes a heating coil configured to induction-heat the workpiece on the workpiece support at a heating position, and an actuator configured to move the heating coil at the heating position relative to the workpiece to adjust a distance between the workpiece and the heating coil.Type: GrantFiled: January 21, 2016Date of Patent: October 15, 2019Assignees: NETUREN CO., LTD., NETUREN TAKUTO CO., LTD.Inventors: Hitoshi Nakatsu, Hisaaki Watanabe
-
Publication number: 20190199251Abstract: The conventional semiconductor device requires use of a separate vibration sensor or the like to detect a rotation abnormality of a motor. According to an embodiment, a semiconductor device includes: a resolver rotation angle conversion circuit that obtains a rotation angle signal indicative of a rotation angle of the motor obtained from a resolver that measures the rotation angle of the motor and generates rotation angle information by converting the rotation angle signal to a digital value; a motor rotation angle conversion circuit that generates rotation angle temporal change information by converting the rotation angle information with respect to each phase of the motor to an angular change of the motor; and a determination circuit that determines that an abnormality occurs in the motor in a case of exceeding a fluctuation abnormality detection range of the rotation angle temporal change in the rotation angle temporal change information.Type: ApplicationFiled: October 31, 2018Publication date: June 27, 2019Inventor: Hisaaki WATANABE
-
Publication number: 20180240930Abstract: A method of manufacturing a lead wire for a solar cell includes heating a wire material by a direct resistance heating or by an induction heating to reduce a 0.2% proof stress of the wire material while conveying the wire material and plating the wire material that is in a heated condition obtained by the direct resistance heating or by the induction heating while further conveying the wire material. An apparatus is configured to implement the method, and includes a plating bath, a conveyor mechanism configured to convey the wire material, a heater configured to heat the wire material, and a controller configured to control the conveyor mechanism and the heater.Type: ApplicationFiled: April 23, 2018Publication date: August 23, 2018Inventors: Yoshiki SETO, Kunihiro KOBAYASHI, Nobumoto ISHIKI, Hisaaki WATANABE
-
Patent number: 10038396Abstract: A sampling period of information according to a load state of an alternating-current motor is controlled so as to be variable with respect to a carrier period of a PWM circuit, and a predetermined arithmetic operation for aggregating information sampled in one period of the carrier period is performed in a separate arithmetic circuit from a CPU. Thereby, in a situation where the rotation of the alternating-current motor becomes too fast with respect to the carrier period, motor rotation control for suppressing a sudden fluctuation of a motor load can be performed by faster reaction while suppressing an increase in an arithmetic control load of a CPU.Type: GrantFiled: October 26, 2012Date of Patent: July 31, 2018Assignee: RENESAS ELECTRONICS CORPORATIONInventor: Hisaaki Watanabe
-
Patent number: 9991410Abstract: A method of manufacturing a lead wire for a solar cell includes heating a wire material by a direct resistance heating or by an induction heating to reduce a 0.2% proof stress of the wire material while conveying the wire material and plating the wire material that is in a heated condition obtained by the direct resistance heating or by the induction heating while further conveying the wire material. An apparatus is configured to implement the method, and includes a plating bath, a conveyor mechanism configured to convey the wire material, a heater configured to heat the wire material, and a controller configured to control the conveyor mechanism and the heater.Type: GrantFiled: September 28, 2012Date of Patent: June 5, 2018Assignee: NETUREN CO., LTD.Inventors: Yoshiki Seto, Kunihiro Kobayashi, Nobumoto Ishiki, Hisaaki Watanabe
-
Patent number: 9926616Abstract: A heating apparatus, a heat treatment apparatus, and a heating method are provided. The heating apparatus includes a workpiece support on which a ring-shaped workpiece is placed, a rotary drive assembly, and a heater configured to heat the workpiece. The workpiece support includes a plurality of rotating rollers arranged in a circumferential direction. The rotary drive assembly is configured to rotate the plurality of rotating rollers to rotate the workpiece placed on the workpiece support along a ring shape of the workpiece. The heater includes a heating coil configured to induction-heat the workpiece on the workpiece support at a heating position, and an actuator configured to move the heating coil at the heating position relative to the workpiece to adjust a distance between the workpiece and the heating coil.Type: GrantFiled: January 21, 2016Date of Patent: March 27, 2018Assignees: NETUREN CO., LTD., NETUREN TAKUTO CO., LTD.Inventors: Hitoshi Nakatsu, Hisaaki Watanabe
-
Patent number: 9630523Abstract: A motor speed determining circuit determining a rotation speed of a motor is provided and a processing of generating motor driving waveform is switched in accordance with the rotation speed of the motor. A resolver signal outputted from a resolver 2 is converted to a digital value by an R/D converter 3, and inputted to a computing circuit of resolver value correction 5 via an R/D conversion interface 4. A current value of a motor M is converted to a digital value by an A/D convertor 8. The computing circuit of resolver value correction 5 computes a resolver correction value of the inputted digital signal and calculates positional data from a corrected resolver value. The computing circuit of motor control computes a current instruction value from a motor current value subjected to digital conversion by the A/D converter 8 and a motor current instruction value etc.Type: GrantFiled: November 27, 2015Date of Patent: April 25, 2017Assignee: Renesas Electronics CorporationInventor: Hisaaki Watanabe
-
Publication number: 20160138121Abstract: A heating apparatus, a heat treatment apparatus, and a heating method are provided. The heating apparatus includes a workpiece support on which a ring-shaped workpiece is placed, a rotary drive assembly, and a heater configured to heat the workpiece. The workpiece support includes a plurality of rotating rollers arranged in a circumferential direction. The rotary drive assembly is configured to rotate the plurality of rotating rollers to rotate the workpiece placed on the workpiece support along a ring shape of the workpiece. The heater includes a heating coil configured to induction-heat the workpiece on the workpiece support at a heating position, and an actuator configured to move the heating coil at the heating position relative to the workpiece to adjust a distance between the workpiece and the heating coil.Type: ApplicationFiled: January 21, 2016Publication date: May 19, 2016Inventors: Hitoshi NAKATSU, Hisaaki WATANABE
-
Publication number: 20160138124Abstract: A heating apparatus, a heat treatment apparatus, and a heating method are provided. The heating apparatus includes a workpiece support on which a ring-shaped workpiece is placed, a rotary drive assembly, and a heater configured to heat the workpiece. The workpiece support includes a plurality of rotating rollers arranged in a circumferential direction. The rotary drive assembly is configured to rotate the plurality of rotating rollers to rotate the workpiece placed on the workpiece support along a ring shape of the workpiece. The heater includes a heating coil configured to induction-heat the workpiece on the workpiece support at a heating position, and an actuator configured to move the heating coil at the heating position relative to the workpiece to adjust a distance between the workpiece and the heating coil.Type: ApplicationFiled: January 21, 2016Publication date: May 19, 2016Inventors: Hitoshi NAKATSU, Hisaaki WATANABE
-
Publication number: 20160075255Abstract: A motor speed determining circuit determining a rotation speed of a motor is provided and a processing of generating motor driving waveform is switched in accordance with the rotation speed of the motor. A resolver signal outputted from a resolver 2 is converted to a digital value by an R/D converter 3, and inputted to a computing circuit of resolver value correction 5 via an R/D conversion interface 4. A current value of a motor M is converted to a digital value by an A/D convertor 8. The computing circuit of resolver value correction 5 computes a resolver correction value of the inputted digital signal and calculates positional data from a corrected resolver value. The computing circuit of motor control computes a current instruction value from a motor current value subjected to digital conversion by the A/D converter 8 and a motor current instruction value etc.Type: ApplicationFiled: November 27, 2015Publication date: March 17, 2016Inventor: Hisaaki Watanabe
-
Patent number: 9273373Abstract: A heating apparatus, a heat treatment apparatus, and a heating method are provided. The heating apparatus includes a workpiece support on which a ring-shaped workpiece is placed, a rotary drive assembly, and a heater configured to heat the workpiece. The workpiece support includes a plurality of rotating rollers arranged in a circumferential direction. The rotary drive assembly is configured to rotate the plurality of rotating rollers to rotate the workpiece placed on the workpiece support along a ring shape of the workpiece. The heater includes a heating coil configured to induction-heat the workpiece on the workpiece support at a heating position, and an actuator configured to move the heating coil at the heating position relative to the workpiece to adjust a distance between the workpiece and the heating coil.Type: GrantFiled: March 14, 2012Date of Patent: March 1, 2016Assignees: NETUREN CO., LTD., NETUREN TAKUTO CO., LTD.Inventors: Hitoshi Nakatsu, Hisaaki Watanabe
-
Patent number: 9221357Abstract: A motor rotation speed determining circuit is provided, and a processing of generating motor driving waveform is switched in accordance with the motor rotation speed. A resolver signal is converted to a digital value by an R/D converter, and inputted to a resolver value correction computing circuit via an R/D conversion interface. A current value of a motor M is converted to a digital value by an A/D converter. The resolver value correction computing circuit computes a resolver correction value of the inputted digital signal and calculates positional data from a corrected resolver value. The motor control computing circuit computes a current instruction value from a motor current value subjected to digital conversion by the A/D converter and a motor current instruction value etc., and a motor waveform output circuit generates a motor driving waveform from the current instruction value and outputs the same to a power module PM.Type: GrantFiled: December 16, 2013Date of Patent: December 29, 2015Assignee: Renesas Electronics CorporationInventor: Hisaaki Watanabe
-
Publication number: 20150270796Abstract: A sampling period of information according to a load state of an alternating-current motor is controlled so as to be variable with respect to a carrier period of a PWM circuit, and a predetermined arithmetic operation for aggregating information sampled in one period of the carrier period is performed in a separate arithmetic circuit from a CPU. Thereby, in a situation where the rotation of the alternating-current motor becomes too fast with respect to the carrier period, motor rotation control for suppressing a sudden fluctuation of a motor load can be performed by faster reaction while suppressing an increase in an arithmetic control load of a CPU.Type: ApplicationFiled: October 26, 2012Publication date: September 24, 2015Inventor: Hisaaki Watanabe
-
Publication number: 20140224387Abstract: A method of annealing a copper wire for an interconnector includes heating a copper wire by a direct resistance heating or by an induction heating, a heating temperature of the heating being in a range of 650° C. to 1020° C., and a heating time of the heating being in a range of 0.3 seconds to 5 seconds.Type: ApplicationFiled: September 28, 2012Publication date: August 14, 2014Applicant: Neturen Co., LTD.Inventors: Yoshiki Seto, Kunihiro Kobayashi, Nobumoto Ishiki, Hisaaki Watanabe
-
Publication number: 20140114522Abstract: A motor rotation speed determining circuit is provided, and a processing of generating motor driving waveform is switched in accordance with the motor rotation speed. A resolver signal is converted to a digital value by an R/D converter, and inputted to a resolver value correction computing circuit via an R/D conversion interface. A current value of a motor M is converted to a digital value by an A/D converter. The resolver value correction computing circuit computes a resolver correction value of the inputted digital signal and calculates positional data from a corrected resolver value. The motor control computing circuit computes a current instruction value from a motor current value subjected to digital conversion by the A/D converter and a motor current instruction value etc., and a motor waveform output circuit generates a motor driving waveform from the current instruction value and outputs the same to a power module PM.Type: ApplicationFiled: December 16, 2013Publication date: April 24, 2014Applicant: Renesas Electronics CorporationInventor: Hisaaki Watanabe
-
Patent number: 8633667Abstract: A motor speed determining circuit determining a rotation speed of a motor is provided and a processing of generating motor driving waveform is switched in accordance with the rotation speed of the motor. A resolver signal outputted from a resolver 2 is converted to a digital value by an R/D converter 3, and inputted to a computing circuit of resolver value correction 5 via an R/D conversion interface 4. A current value of a motor M is converted to a digital value by an A/D convertor 8. The computing circuit of resolver value correction 5 computes a resolver correction value of the inputted digital signal and calculates positional data from a corrected resolver value. The computing circuit of motor control computes a current instruction value from a motor current value subjected to digital conversion by the A/D converter 8 and a motor current instruction value etc.Type: GrantFiled: February 10, 2010Date of Patent: January 21, 2014Assignee: Renesas Electronics CorporationInventor: Hisaaki Watanabe
-
Publication number: 20120234824Abstract: A heating apparatus, a heat treatment apparatus, and a heating method are provided. The heating apparatus includes a workpiece support on which a ring-shaped workpiece is placed, a rotary drive assembly, and a heater configured to heat the workpiece. The workpiece support includes a plurality of rotating rollers arranged in a circumferential direction. The rotary drive assembly is configured to rotate the plurality of rotating rollers to rotate the workpiece placed on the workpiece support along a ring shape of the workpiece. The heater includes a heating coil configured to induction-heat the workpiece on the workpiece support at a heating position, and an actuator configured to move the heating coil at the heating position relative to the workpiece to adjust a distance between the workpiece and the heating coil.Type: ApplicationFiled: March 14, 2012Publication date: September 20, 2012Applicants: NETUREN TAKUTO CO., LTD, NETUREN CO., LTDInventors: Hitoshi Nakatsu, Hisaaki Watanabe