公开(公告)号：US10374517B2

公开(公告)日：2019-08-06

申请号：US16185176

申请日：2018-11-09

Applicant: SOKEN, INC. ,  DENSO CORPORATION

Inventor： Kenji Tomita ,  Seiji Iyasu ,  Yuichi Handa

IPC: H02M3/335 ,  H02M3/337

Abstract: An apparatus for controlling a power converter includes a first converter configured to convert an AC voltage into a DC voltage by operations of an input side switch, a DC link capacitor charged with the DC voltage from the first converter, and a second converter configured to step down the DC voltage across the DC link capacitor by operations of one or more output side switches. In the apparatus, a lower limit calculator calculates a lower limit of the DC voltage across the DC link capacitor based on an output voltage of the second converter, a turns ratio of a transformer of the second converter, and a ratio of a turn-on period to one switching period for the one or more output side switches. A switch controller operates the input side switch to control the voltage across the DC link capacitor to a command voltage higher than the lower limit.

公开(公告)号：US20180138802A1

公开(公告)日：2018-05-17

申请号：US15816498

申请日：2017-11-17

Applicant: DENSO CORPORATION

Inventor： Seiji Iyasu ,  Yuji Hayashi ,  Kimikazu Nakamura ,  Yuichi Handa

IPC: H02M1/088 ,  H02M3/335

CPC classification number: H02M1/088 ,  H02M1/32 ,  H02M3/33592 ,  H02M2001/0009

Abstract: A control apparatus is provided which controls a power converter including a first circuit including first-side switching elements, and a second circuit including second-side switching elements and a choke coil. The control apparatus includes a current obtainment unit which obtains a value of current flowing through the choke coil, and a control unit which, when power is supplied from the second circuit to the first circuit, keeps a first-side switching element ON during a predetermined time period, before turning off at least one second-side switching element in an on state, the first-side switching element generating a reverse current in the second-side switching element to be turned off. The control unit performs control of keeping the first-side switching element ON during the predetermined time period and control of turning off the second-side switching element, on condition that the obtained value of the current is more than a predetermined command value.

公开(公告)号：US20240227776A9

公开(公告)日：2024-07-11

申请号：US18400486

申请日：2023-12-29

Applicant: DENSO CORPORATION

Inventor： Syuya KAMIZONO ,  Akira Sakamoto ,  Yuichi Handa ,  Masaki Amakawa ,  Keisuke Kawai

IPC: B60W20/15 ,  F02N11/08 ,  H02P23/04

CPC classification number: B60W20/15 ,  F02N11/0859 ,  H02P23/04 ,  B60W2710/083 ,  F02N2200/042 ,  F02N2250/00

Abstract: A control apparatus for a rotating electric machine is provided. The rotating electric machine includes a moving portion that applies torque to a drive shaft of an internal combustion engine. The control apparatus acquires a rotational frequency signal that is a signal that changes depending on a rotational frequency of the moving portion per unit time. The control apparatus calculates a damping torque that is applied from the moving portion to the drive shaft to suppress vibration during operation of the internal combustion engine. The control apparatus calculates the damping torque based on the rotational frequency signal acquired by the signal acquiring unit in response to the rotating electric machine performing cranking of the internal combustion engine.

公开(公告)号：US11418128B2

公开(公告)日：2022-08-16

申请号：US17106283

申请日：2020-11-30

Applicant: DENSO CORPORATION

Inventor： Seiji Iyasu ,  Yuji Hayashi ,  Yuichi Handa

IPC: H02M7/219 ,  H02M1/12 ,  G01R19/165 ,  H03K5/24 ,  H02M1/00

Abstract: A control apparatus is provided for controlling an electric power conversion apparatus. The electric power conversion apparatus includes a reactor and a drive switch and is configured to convert one of an AC voltage and a DC voltage into the other of the AC voltage and the DC voltage. The control apparatus is configured to: acquire a current detection value that is a detected value of reactor current flowing through the reactor; acquire the AC voltage; calculate, based on the AC voltage, a command value of the reactor current; set a correction value based on the AC voltage; calculate a post-correction current detection value by subtracting the correction value from the current detection value; and operate the drive switch through peak current mode control, thereby controlling the post-correction current detection value to be in agreement with the command value.

公开(公告)号：US11183944B2

公开(公告)日：2021-11-23

申请号：US17066973

申请日：2020-10-09

Applicant: DENSO CORPORATION

Inventor： Seiji Iyasu ,  Yuji Hayashi ,  Yuichi Handa

IPC: H02M7/217 ,  H02M1/42 ,  H02M7/12 ,  H02M1/12 ,  H02M7/48 ,  H03K5/13 ,  H03K5/00 ,  H02M1/00

Abstract: In a control apparatus for a power converter, a current obtainer obtains a current flowing through an inductor as an inductor current, and an alternating-current voltage obtainer obtains an alternating-current voltage. A drive signal outputting unit generates, based on the alternating-current voltage obtained by the voltage obtainer, a sinusoidal command. The drive signal outputting unit performs peak-current mode control to output a drive signal that controls switching of the drive switch to thereby cause the inductor current to follow the sinusoidal command. A delay unit delays, for one switching cycle of the drive switch, an off-switching timing of the drive switch in accordance with the alternating-current voltage. The drive signal defines the off-switching timing of the switch.

公开(公告)号：US10075059B2

公开(公告)日：2018-09-11

申请号：US15816555

申请日：2017-11-17

Applicant: DENSO CORPORATION

Inventor： Seiji Iyasu ,  Yuji Hayashi ,  Kimikazu Nakamura ,  Yuichi Handa

IPC: G01R19/22 ,  H02M3/335 ,  H02M1/088 ,  H02M1/00

CPC classification number: H02M1/088 ,  G01R19/22 ,  G01R31/42 ,  H02M3/33592 ,  H02M2001/0009 ,  Y02B70/1475

Abstract: A current detection apparatus is provided which detects a current flowing through a detection part in an electrical circuit. The current detection apparatus includes a first coil connected in series with the detection part, a second coil magnetically coupled with the first coil, a full-wave rectifier circuit connected to both ends of the second coil, a switching element having a first end connected to a positive electrode side output part of the full-wave rectifier circuit and a second end connected to a first resistor, and a second resistor that forms a closed circuit with the second coil regardless of an open or closed state of the switching element.