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1.发明授权公开(公告)号：US11114970B2
公开(公告)日：2021-09-07
申请号：US16614193
申请日：2017-07-19
Applicant: Mitsubishi Electric Corporation
Inventor： Kazunori Hatakeyama , Keisuke Uemura , Yosuke Shinomoto , Koichi Arisawa
Abstract: A motor driver includes an inverter used for driving a motor and configured to apply an alternating-current voltage to the motor. The inverter drives, during start operation, a switching element of the inverter with a first PWM signal that is PWM modulated with a carrier frequency that is a first integer multiple of a frequency of the alternating-current voltage, and thereafter drives the switching element with a second PWM signal that is PWM modulated with a carrier frequency that is a second integer multiple of the frequency of the alternating-current voltage. The second integer is smaller than the first integer.
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公开(公告)号：US10686397B2
公开(公告)日：2020-06-16
申请号：US16097298
申请日：2016-06-17
Applicant: Mitsubishi Electric Corporation
Inventor： Shigeo Umehara , Koichi Arisawa , Yosuke Shinomoto , Takashi Yamakawa , Shinya Toyodome
IPC: H02P21/00 , H02P27/12 , H02P25/22 , H02P27/06 , H02P21/24 , H02M3/155 , H02P21/18 , H02P21/22 , F25B31/02 , H02M7/5387 , H02P21/05 , H02M1/00
Abstract: A motor system according to the present invention includes: a motor including a first winding portion and a second winding portion, the second winding portion having a larger number of turns than the first winding portion; a first inverter connected to the first winding portion; and a second inverter connected to the second winding portion.
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公开(公告)号：US10211765B2
公开(公告)日：2019-02-19
申请号：US15757733
申请日：2015-10-30
Applicant: Mitsubishi Electric Corporation
Inventor： Koichi Arisawa , Keisuke Uemura , Yuji Takayama , Yosuke Shinomoto
Abstract: A motor control device includes a position sensor that detects a position of a motor, an AD converter that converts an analog signal, which is a detection value of a motor current, into a digital signal, and a control circuit that drives an inverter using an output signal of the AD converter. The control circuit starts the AD converter during a permission period, and performs processing for the analog-digital converter during an electrical half cycle including a permission period. The length of a prohibition period obtained by excluding a permission period from an electrical half cycle decreases as the rotating speed of the motor increases.
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4.发明授权公开(公告)号：US10113784B2
公开(公告)日：2018-10-30
申请号：US15026628
申请日：2014-10-15
Applicant: Mitsubishi Electric Corporation
Inventor： Yosuke Shinomoto , Kazunori Hatakeyama , Shota Kamiya
IPC: H02P27/08 , F25B49/02 , H02M7/06 , H02M1/36 , H02M3/158 , H02M7/5387 , F25B13/00 , F25B31/02 , F25D11/00 , H02M1/00
Abstract: A direct-current power supply device includes a switching unit constituted by a first switching element and a second switching element and a control unit that controls the operations of the first witching element and the second switching element. The switching unit has a first mode in which on-duty is a first value and a second mode in which the on-duty is a second value larger than the first value. When transitioning the switching unit from the first mode to the second mode, the control unit controls the switching unit such that the time until the on-duty reaches the second value is equal to or longer than a fixed time and controls, after the on-duty reaches the second value, an operation cycle of the switching unit to extend the operation cycle.
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公开(公告)号：US10056826B2
公开(公告)日：2018-08-21
申请号：US15310136
申请日：2014-06-05
Applicant: Mitsubishi Electric Corporation
Inventor： Kazunori Hatakeyama , Keisuke Uemura , Yosuke Shinomoto
IPC: H02M1/42 , H02M7/5387 , H02M1/00
CPC classification number: H02M1/4225 , F25B49/02 , F25B2600/021 , H02M3/158 , H02M7/53873 , H02M2001/0012 , Y02B30/741 , Y02B70/126
Abstract: A direct-current power supply device is a direct-current power supply device that converts a three-phase alternating current to a direct current and supplies the direct current to a load, and includes a first capacitor and a second capacitor connected in series between output terminals to the load, a charge unit that selectively charges one or both of the first capacitor and the second capacitor, and a control unit that controls the charge unit. The control unit controls an output voltage of the direct-current power supply device by a charging period of the charge unit, and also controls a power factor and a harmonic current of the direct-current power supply device by a charge timing with respect to a reference phase of the three-phase alternating current of the charge unit as a reference.
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Patent Agency Ranking
公开(公告)号：US09929636B2
公开(公告)日：2018-03-27
申请号：US15117285
申请日：2014-02-19
Applicant: Mitsubishi Electric Corporation
Inventor： Yosuke Shinomoto , Kazunori Hatakeyama , Shota Kamiya , Keisuke Uemura
CPC classification number: H02M1/12 , F25B49/025 , F25B2600/021 , H02M1/42 , H02M1/4216 , H02M1/4225 , H02M7/06 , H02P27/08 , H02P2201/09 , Y02B30/741 , Y02B70/126
Abstract: A first reactor is provided on the input side of a rectifying circuit that rectifies AC power (on the side of an AC power supply), and on the output side of the rectifying circuit (on the side of a load), first and second capacitors that are connected in series to each other, and first and second switching elements that switch between charging and not charging of the first and second capacitors, respectively, are provided, a second capacitor group in Y-connection, provided with three capacitors, each of which is connected to each phase-terminal of the first reactor on the side of the rectifying circuit, is connected to the midpoint of the first and second switching elements, and the output voltage to the load is boosted, while the on-duty of the first switching element and the on-duty of the second switching element are controlled to be equal to each other.
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公开(公告)号：US10658967B2
公开(公告)日：2020-05-19
申请号：US15505631
申请日：2014-11-04
Applicant: Mitsubishi Electric Corporation
Inventor： Yosuke Shinomoto , Takuya Shimomugi , Norikazu Ito , Keisuke Uemura , Takashi Yamakawa
IPC: H02P6/00 , H02P27/08 , H02P29/68 , H02M7/5395 , H02M7/48 , H02K5/18 , H02M7/5387 , H02M1/32 , H02M1/088 , G05B11/28
Abstract: A motor drive apparatus driving a motor as a three-phase motor converting direct power into three-phase alternating power, includes: inverter modules equivalent in number to phases of the motor; and a control unit generating PWM signals used to drive the inverter modules with PWM. The inverter modules each include a plurality of switching element pairs connected in parallel, each of the switching element pairs including two switching elements connected in series.
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公开(公告)号：US10177703B2
公开(公告)日：2019-01-08
申请号：US15509985
申请日：2014-09-17
Applicant: Mitsubishi Electric Corporation
Inventor： Yosuke Shinomoto , Koichi Arisawa , Takashi Yamakawa , Yuji Takayama
Abstract: A leak-current detecting unit detects a zero-phase current flowing from an electric-motor driving device, which drives an electric motor with electric power from an alternating-current power supply, or the electric motor to a ground, a leak-current control unit that, on the basis of the zero-phase current detected by the leak-current detecting unit, generates a control signal having cyclicity synchronized with the alternating-current power supply, and an anti-phase generating unit that generates an anti-phase current that is in anti-phase to the zero-phase current on the basis of the control signal from the leak-current control unit, and outputs the anti-phase current.
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公开(公告)号：US09735666B2
公开(公告)日：2017-08-15
申请号：US14782058
申请日：2013-04-12
Applicant: Mitsubishi Electric Corporation
Inventor： Takuya Shimomugi , Kenta Yuasa , Yosuke Shinomoto , Shinsaku Kusube
CPC classification number: H02M1/32 , H02M1/4225 , H02M3/155 , H02M3/156 , H02M7/06 , H02M2001/322 , Y02B70/126
Abstract: A power conversion device located between an AC power source and a load includes: a rectifier circuit unit that rectifies a voltage of the AC power source; a smoothing unit that smooths a DC voltage on the load side of the rectifier circuit unit; a short-circuiting unit that short-circuits the AC power source; a step-up reactor—located on the AC power source side of the short-circuiting unit; at least one of a reactor current detecting unit—that detects the current of the step-up reactor and a bus voltage detecting unit that detects an output voltage of the smoothing unit; a counterflow preventing element that prevents a counterflow of the current from the smoothing unit to the AC power source; a switching control unit that outputs a control signal for the short-circuiting unit; and a switching frequency changing unit that changes a frequency of the control signal using a logic operation.
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10.发明授权公开(公告)号：US09628003B2
公开(公告)日：2017-04-18
申请号：US15029648
申请日：2013-10-18
Applicant: Mitsubishi Electric Corporation
Inventor： Yosuke Shinomoto , Kazunori Hatakeyama , Shota Kamiya
IPC: H02H7/08 , H02P6/12 , H02M1/32 , H02M3/158 , H02M7/217 , F25B31/02 , H02H7/12 , H02K1/02 , H02K1/27 , H02M7/06 , H02P29/024 , H02M1/00 , H02M3/155
CPC classification number: H02P6/12 , F25B31/02 , H02H7/1213 , H02H7/1255 , H02K1/02 , H02K1/27 , H02M1/32 , H02M3/158 , H02M7/06 , H02M7/2176 , H02M2001/007 , H02M2001/325 , H02M2003/1552 , H02P29/027
Abstract: A direct-current power supply device includes a rectifier connected to a power supply, a charge storage unit configured by a first capacitor and a second capacitor connected in series, a switching unit configured by a first switching element 4a and a second switching element connected in series and backflow preventing elements that suppress a backflow of electric charges from the charge storage unit, a reactor, a control unit that controls operations of the first switching element and the second switching element, and a direct-current-voltage detecting unit that detects a first both-end voltage, which is a voltage across the first capacitor, and a second both-end voltage, which is a voltage across the second capacitor. The control unit detects, on the basis of a voltage difference between the first both-end voltage and the second both-end voltage, a short-circuit failure of one of the first switching element and the second switching element.
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