Patents by Inventor Katsuyuki Sumimoto
Katsuyuki Sumimoto 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: 8749205Abstract: In a control device for a vehicle AC generator, a voltage control includes target voltage adjusting means for adjusting a target voltage value in response to a target change command from an external control unit and a gradual excitation control circuit that controls an excitation duty to increase according to an excitation duty control characteristic when a vehicle load increases and when the target voltage adjusting means varies the target voltage value to a lower value. The gradual excitation control circuit includes duty characteristic varying means for varying the excitation duty control characteristic. The duty characteristic varying means varies a rate of increase of the excitation duty in a predetermined region of the excitation duty control characteristic in comparison with its other region.Type: GrantFiled: November 20, 2009Date of Patent: June 10, 2014Assignee: Mitsubishi Electric CorporationInventors: Junya Sasaki, Katsuyuki Sumimoto
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Publication number: 20130335039Abstract: The control device including: a power transistor (502) for controlling conduction/non-conduction of a field coil (3) in accordance with an output voltage of an AC generator (1) mounted on a vehicle; an RPM detection section (511) for detecting an RPM of the AC generator (1); a drive duty setting section (510) for determining whether or not the RPM detected by the RPM detection section (511) is equal to or higher than a predetermined threshold, and reducing a conduction ratio of the field coil (3) when determining that the RPM is equal to or higher than the predetermined threshold; and a driver (504) for driving the power transistor (502) based on the conduction ratio. In this manner, the conduction ratio of the field coil (3) is reduced to suppress the drive torque.Type: ApplicationFiled: November 26, 2012Publication date: December 19, 2013Inventors: Keiichi KOMURASAKI, Kazunori TANAKA, Katsuyuki SUMIMOTO
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Patent number: 8581558Abstract: A control device for a vehicle AC generator, in which a part can be shared even when electrical configuration positions of field coils of rotors of generators are different, is obtained. Switching elements connected in series to the field coil in order to control a field current; and a control signal processing unit, in which information as to whether the field coil is connected to the high potential side or connected to the low potential side is inputted, one of the high potential side terminal and the low potential side terminal is selected on the basis of the inputted information, a control signal is outputted, and ON/OFF control of the switching element is performed to control the field current of the field coil, are provided.Type: GrantFiled: December 16, 2010Date of Patent: November 12, 2013Assignee: Mitsubishi Electric CorporationInventors: Katsuyuki Sumimoto, Noriyuki Wada
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Publication number: 20130271093Abstract: A control apparatus of an AC generator for a vehicle can obtain large regeneration energy without making the size of the generator large. In the control apparatus in which an AC output current is rectified and supplied to a vehicle mounted battery (6) and an electric load of the vehicle, provision is made for a regulator (5) that controls a continuity rate of electric power supply to a field coil (3) of a generator (1) by controlling an output voltage of the generator (1). The regulator (5) suppresses the continuity rate of electric power supply to the field coil (3) at the time of steady operation of the vehicle, and switches a suppression value of the continuity rate of electric power supply so as to increase the continuity rate of electric power supply at the time of deceleration operation of the vehicle.Type: ApplicationFiled: August 13, 2012Publication date: October 17, 2013Applicant: Mitsubishi Electric CorporationInventors: Keiichi KOMURASAKI, Katsuyuki Sumimoto, Jyunya Sasaki, Kazunori Tanaka
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Publication number: 20120262128Abstract: In a control device for a vehicle AC generator, a voltage control includes target voltage adjusting means for adjusting a target voltage value in response to a target change command from an external control unit and a gradual excitation control circuit that controls an excitation duty to increase according to an excitation duty control characteristic when a vehicle load increases and when the target voltage adjusting means varies the target voltage value to a lower value. The gradual excitation control circuit includes duty characteristic varying means for varying the excitation duty control characteristic. The duty characteristic varying means varies a rate of increase of the excitation duty in a predetermined region of the excitation duty control characteristic in comparison with its other region.Type: ApplicationFiled: November 20, 2009Publication date: October 18, 2012Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Junya Sasaki, Katsuyuki Sumimoto
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Publication number: 20120217944Abstract: A current detector of an inductive load includes: an inductive load 100; a switching element 101 connected in series with the inductive load and controls an electric current to be carried through this inductive load by ON/OFF operation; a current circulating diode 102 connected in parallel with the inductive load and circulates an electric current of the inductive load when the switching element is OFF; current detecting device 103 making a sampling in a cycle of a predetermined sampling period to detect an electric current to be carried through the switching element 101; and current correction device 104 making a correction with respect to an electric current value having been detected at the current detector, and in which the current correction device 104 changes the correction rate based on DUTY of a pulse with which the switching element is brought in ON/OFF operation.Type: ApplicationFiled: January 7, 2010Publication date: August 30, 2012Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Noriyuki Wada, Katsuyuki Sumimoto, Junya Sasaki
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Publication number: 20120161724Abstract: A vehicle power generation voltage control apparatus is obtained, which has improved reliability, when in a faulty condition, of controlling an exciting current flowing through a field winding even if a monitor and detection circuit becomes faulty. An output voltage of a vehicle power generator or a battery terminal voltage connected to the vehicle power generator is detected by plural monitor and detection circuits, and according to the output of the plural monitor and detection circuits, an exciting current flowing through a field winding of the vehicle power generator is switched on and off, to control the output voltage of the vehicle power generator or the battery terminal voltage connected to the vehicle power generator to be a target voltage.Type: ApplicationFiled: November 6, 2009Publication date: June 28, 2012Applicant: Mitsubishi Electric CorporationInventors: Katsuyuki Sumimoto, Junya Sasaki
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Publication number: 20120007569Abstract: A control device for a vehicle AC generator, in which a part can be shared even when electrical configuration positions of field coils of rotors of generators are different, is obtained. Switching elements connected in series to the field coil in order to control a field current; and a control signal processing unit, in which information as to whether the field coil is connected to the high potential side or connected to the low potential side is inputted, one of the high potential side terminal and the low potential side terminal is selected on the basis of the inputted information, a control signal is outputted, and ON/OFF control of the switching element is performed to control the field current of the field coil, are provided.Type: ApplicationFiled: December 16, 2010Publication date: January 12, 2012Applicant: Mitsubishi Electric CorporationInventors: Katsuyuki SUMIMOTO, Noriyuki Wada
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Patent number: 8063499Abstract: There can be performed the best power-generation control without enlarging the apparatus, deteriorating the reliability, and raising the cost. The power-generation control apparatus is provided with a power-generation amount suppression determination unit that determines whether or not to change a power-generation amount suppression level for suppressing the power-generation amount of the in-vehicle electric rotating machine, based on a present generation-voltage command value generated by a generated-voltage command unit and a generated-voltage past command value based on a past generated-voltage command value stored in a generated-voltage command storage unit, and that determines whether or not the power-generation amount suppression control is required, based on at least one of a past value and a present value of the generated-voltage command; therefore, there can be performed the best power-generation control without enlarging the apparatus, deteriorating the reliability, and raising the cost.Type: GrantFiled: May 28, 2009Date of Patent: November 22, 2011Assignee: Mitsubishi Electric CorporationInventors: Noriyuki Wada, Katsuyuki Sumimoto, Jyunya Sasaki
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Publication number: 20100194355Abstract: There can be performed the best power-generation control without enlarging the apparatus, deteriorating the reliability, and raising the cost. The power-generation control apparatus is provided with a power-generation amount suppression determination unit that determines whether or not to change a power-generation amount suppression level for suppressing the power-generation amount of the in-vehicle electric rotating machine, based on a present generation-voltage command value generated by a generated-voltage command unit and a generated-voltage past command value based on a past generated-voltage command value stored in a generated-voltage command storage unit, and that determines whether or not the power-generation amount suppression control is required, based on at least one of a past value and a present value of the generated-voltage command; therefore, there can be performed the best power-generation control without enlarging the apparatus, deteriorating the reliability, and raising the cost.Type: ApplicationFiled: May 28, 2009Publication date: August 5, 2010Applicant: Mitsubishi Electric CorporationInventors: Noriyuki WADA, Katsuyuki Sumimoto, Jyunya Sasaki
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Patent number: 7545123Abstract: A control apparatus for a vehicular AC generator analyzes, at least, a “HIGH” logic continuation time, a “LOW” logic continuation time and the pulse width duty of an external signal, for the external signal pulse inputted from an external unit. In a case where the “HIGH” logic or “LOW” logic of the external signal pulse has continued for a predetermined time period, the control apparatus controls a generator control voltage as either of adjustment voltages consisting of the two values of an ordinary voltage and a voltage lower than the ordinary voltage. On the other hand, in a case where the “HIGH” logic or “LOW” logic of the external signal pulses are iterated within a predetermined time period, and where the pulse width duty of the external signal falls within a predetermined range, the control apparatus controls the generator control voltage as a multistage or linear adjustment voltage which is the function of the pulse width duty ratio.Type: GrantFiled: June 5, 2007Date of Patent: June 9, 2009Assignee: Mitsubishi Electric CorporationInventor: Katsuyuki Sumimoto
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Patent number: 7508172Abstract: A failure detection apparatus for an alternator can detect a short circuit failure of a diode in a full-wave rectifier with high precision by use of a simple circuit structure based on the state of a detection terminal when the alternator generates no electricity. The rectifier circuit has a pair of diodes connected to a positive terminal and a negative terminal, respectively, of a battery. A failure detection circuit has the detection terminal connected to a P terminal or a neutral point of an armature coil, and makes a failure determination in the following manner. When in the non-power generation state of the armature coil, the detection terminal is in a floating or high impedance state, the full-wave rectifier circuit is determined to be normal, whereas when otherwise, the full-wave rectifier circuit is determined to be in a failure.Type: GrantFiled: March 4, 2008Date of Patent: March 24, 2009Assignee: Mitsubishi Electric CorporationInventors: Shinji Nishimura, Katsuyuki Sumimoto
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Patent number: 7486052Abstract: A controller for a vehicle AC generator that allows the aging test time of a CMOS logic circuit to be reduced is provided. The controller includes a specified signal detecting circuit connected to a third external terminal to detect a specified signal, a voltage selector circuit that generates a voltage selector signal in response to the detection output of the specified signal detecting circuit, and a power supply circuit connected to the first external terminal to output, as internal power supply voltage, first power supply voltage in a first state in which the specified signal is not input to the third external terminal and second power supply voltage higher than the first power supply voltage in a second state in which the specified signal is input to the third external terminal.Type: GrantFiled: April 6, 2007Date of Patent: February 3, 2009Assignee: Mitsubishi Electric CorporationInventor: Katsuyuki Sumimoto
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Patent number: 7477493Abstract: A vehicle alternator control device in which, when a signal detection portion detects a determined input signal, an operating mode of an overvoltage warning portion is switched to a detection operating mode by an overvoltage warning operating mode switching portion. In the detection operating mode, the overvoltage warning portion is activated when a voltage below a determined voltage has continued for a time that is less than a determined time. Accordingly, checks related to the operation of the overvoltage warning portion can be completed in a short time at a plant or the like.Type: GrantFiled: April 27, 2007Date of Patent: January 13, 2009Assignee: Mitsubishi Electric CorporationInventors: Katsuyuki Sumimoto, Junya Sasaki
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Patent number: 7443143Abstract: A controller of a generator for a vehicle in the invention includes a battery voltage detecting circuit and an output terminal voltage detecting circuit of an AC generator. A value of a detected voltage of the output terminal voltage of the AC generator is set to be higher than a value of a detected voltage of the battery voltage. A diagnosis alarm signal is outputted when the detected voltage of the battery voltage is lower than the set value while the detected voltage of the output terminal is higher than the set value.Type: GrantFiled: May 25, 2007Date of Patent: October 28, 2008Assignee: Mitsubishi Electric Corp.Inventors: Junya Sasaki, Katsuyuki Sumimoto
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Publication number: 20080136379Abstract: A control apparatus for a vehicular AC generator analyzes, at least, a “HIGH” logic continuation time, a “LOW” logic continuation time and the pulse width duty of an external signal, for the external signal pulse inputted from an external unit. In a case where the “HIGH” logic or “LOW” logic of the external signal pulse has continued for a predetermined time period, the control apparatus controls a generator control voltage as either of adjustment voltages consisting of the two values of an ordinary voltage and a voltage lower than the ordinary voltage. On the other hand, in a case where the “HIGH” logic or “LOW” logic of the external signal pulses are iterated within a predetermined time period, and where the pulse width duty of the external signal falls within a predetermined range, the control apparatus controls the generator control voltage as a multistage or linear adjustment voltage which is the function of the pulse width duty ratio.Type: ApplicationFiled: June 5, 2007Publication date: June 12, 2008Applicant: Mitsubishi Electric CorporationInventor: Katsuyuki Sumimoto
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Publication number: 20080106240Abstract: A controller for a vehicle AC generator that allows the aging test time of a CMOS logic circuit to be reduced is provided. The controller includes a specified signal detecting circuit connected to a third external terminal to detect a specified signal, a voltage selector circuit that generates a voltage selector signal in response to the detection output of the specified signal detecting circuit, and a power supply circuit connected to the first external terminal to output, as internal power supply voltage, first power supply voltage in a first state in which the specified signal is not input to the third external terminal and second power supply voltage higher than the first power supply voltage in a second state in which the specified signal is input to the third external terminal.Type: ApplicationFiled: April 6, 2007Publication date: May 8, 2008Applicant: MITSUBISHI ELECTRIC CORPORATIONInventor: Katsuyuki Sumimoto
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Publication number: 20080106829Abstract: A vehicle alternator control device in which, when a signal detection portion detects a determined input signal, an operating mode of an overvoltage warning portion is switched to a detection operating mode by an overvoltage warning operating mode switching portion. In the detection operating mode, the overvoltage warning portion is activated when a voltage below a determined voltage has continued for a time that is less than a determined time. Accordingly, checks related to the operation of the overvoltage warning portion can be completed in a short time at a plant or the like.Type: ApplicationFiled: April 27, 2007Publication date: May 8, 2008Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Katsuyuki Sumimoto, Junya Sasaki
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Publication number: 20080100269Abstract: A controller of a generator for a vehicle in the invention includes a battery voltage detecting circuit and an output terminal voltage detecting circuit of an AC generator. A value of a detected voltage of the output terminal voltage of the AC generator is set to be higher than a value of a detected voltage of the battery voltage. A diagnosis alarm signal is outputted when the detected voltage of the battery voltage is lower than the set value while the detected voltage of the output terminal is higher than the set value.Type: ApplicationFiled: May 25, 2007Publication date: May 1, 2008Applicant: Mitsubishi Electric CorporationInventors: Junya Sasaki, Katsuyuki Sumimoto
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Patent number: 7276817Abstract: There is provided an output voltage control apparatus for a vehicular AC generator in which a generator output voltage including a ripple component can be made to more approach a reference voltage. The control apparatus includes a comparison circuit to compare a detection voltage including a ripple component with a reference voltage and to output an effective comparison output in each of low output sections in which the detection voltage is lower than the reference voltage by the ripple component, an on period counter to count up, in a count enable period set in each of the control periods, a count value while adding the count value in each of the low output sections based on the effective comparison output, and a memory circuit to store a final count value in the count enable period in each of the control periods.Type: GrantFiled: February 9, 2006Date of Patent: October 2, 2007Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Junya Sasaki, Katsuyuki Sumimoto