公开(公告)号：US20240030831A1

公开(公告)日：2024-01-25

申请号：US18374785

申请日：2023-09-29

Applicant: DENSO CORPORATION

Inventor： Ken TOSHIYUKI

IPC: H02M7/5387 ,  H02P27/06 ,  H02M1/00 ,  H02M7/487

CPC classification number: H02M7/53871 ,  H02P27/06 ,  H02M1/0009 ,  H02M7/487

Abstract: In an inverter according to the present disclosure, in an emergency operation, a control circuit changes the electric potential of a restricted output wiring between two of a higher potential, a neutral-point potential and a lower potential excluding a forbidden potential, and changes each of the electric potentials of normal output wirings between the higher potential, the neutral-point potential and the lower potential. Moreover, in a restricted state where a command value vector belongs to one of first restricted triangular regions, the control circuit outputs coordinates of an origin, first coordinates and second coordinates at staggered times. The second coordinates are lower coordinates of a second intermediate coordinate point when the first coordinates are upper coordinates of a first intermediate coordinate point, and are upper coordinates of the second intermediate coordinate point when the first coordinates are lower coordinates of the first intermediate coordinate point.

公开(公告)号：US20240030803A1

公开(公告)日：2024-01-25

申请号：US18372307

申请日：2023-09-25

Applicant: DENSO CORPORATION

Inventor： Ryoya KAZAOKA ,  Yusuke SHINDO ,  Shunichi KUBO ,  Ken TOSHIYUKI

IPC: H02M1/14 ,  H02M7/5395 ,  H02P21/22 ,  H02J7/00 ,  B60L15/00 ,  B60L58/16

CPC classification number: H02M1/14 ,  H02M7/5395 ,  H02P21/22 ,  H02J7/0047 ,  B60L15/007 ,  B60L58/16 ,  H02P27/08

Abstract: A power converter has a capacitor and a power conversion unit having a series-connected unit composed of an upper arm side switching element and a lower arm side switching element. The capacitor is connected in parallel with the serios connection unit. The power conversion unit supplies electric power to a motor. A controller for the power conversion unit has a frequency characteristics estimation part estimating frequency characteristics of a battery current of the battery when a current is flowing between the power convertor and the battery, a ripple current setting part determining a ripple frequency of a ripple current contained in the battery current based on the frequency characteristics of the battery current, and a control part performing a switching control of the switching elements based on the ripple frequency in order to generate the ripple current.

公开(公告)号：US20180151708A1

公开(公告)日：2018-05-31

申请号：US15824578

申请日：2017-11-28

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  DENSO CORPORATION

Inventor： Ken TOSHIYUKI ,  Yusuke SHINDO ,  Tomotaka SUZUKI

IPC: H01L29/739 ,  H03K17/16 ,  H03K17/082

CPC classification number: H01L29/7393 ,  H01L27/088 ,  H01L29/0696 ,  H03K17/0828 ,  H03K17/127 ,  H03K17/166 ,  H03K17/168 ,  H03K2217/0027 ,  H03K2217/0036

Abstract: A switching circuit may be provided with: a parallel circuit including a first IGBT and a second IGBT connected in parallel; a controller configured to receive a signal indicating a turn-on timing and a turn-off timing. The controller is configured to: turn on both of the first and second IGBTs at the turn-on timing, execute a first control in which one of the first and second IGBTs is turned off before the turn-off timing and the other of the first and second IGBTs is turned off at the turn-off timing in a case where current flowing through the parallel circuit is equal to or lower than a threshold value, and execute a second control in which both of the first and second IGBTs are turned off at the turn-off timing in a case where the current flowing through the parallel circuit is higher than the threshold value.

公开(公告)号：US20250088131A1

公开(公告)日：2025-03-13

申请号：US18958827

申请日：2024-11-25

Applicant: DENSO CORPORATION

Inventor： Yosuke SUZUKI ,  Ken TOSHIYUKI

IPC: H02P27/06 ,  H02P21/14 ,  H02P21/22

Abstract: The control device of the three-level inverter is applied to a system having a first battery and a second battery, a drive object, and a three-level inverter having switches for three phases. The control device of the three-level inverter includes: a neutral point information acquisition unit that acquires neutral point information, a command voltage acquisition unit that acquires a command voltage vector to control a system output of the drive object to approach a command value, a setting unit that sets output patterns, which are combinations of output voltage vectors, each of the output voltage vectors indicating the phase-voltage for each of the three phases, that can be output by the three-level inverter, based on the command voltage vector, and a control unit that turns each of the switches on and off based on the output voltage vectors included in the output patterns.

公开(公告)号：US20220181992A1

公开(公告)日：2022-06-09

申请号：US17681922

申请日：2022-02-28

Applicant: DENSO CORPORATION

Inventor： Ken TOSHIYUKI

IPC: H02M7/487 ,  H02M7/537 ,  H02M1/00

Abstract: In an inverter, three switching circuits each include first to fourth switching elements, first and second diodes, and a control circuit controlling potentials of gates. The control circuit causes potentials of U-, V-, and W-phase output wirings to change among high, neutral point, and low potentials. The control circuit performs an emergency operation when any of the second and third switching elements and the first and second diodes has caused a short fault. In the emergency operation, a potential of a limit output wiring is caused to change between two potentials that are not inhibiting potentials, and potentials of normal output wirings are caused to change among three potentials. When the short-fault element is the second switching element or the second diode, an inhibiting potential is the low potential. When the short-fault element is the third switching element or the first diode, the inhibiting potential is the high potential.

公开(公告)号：US20200112308A1

公开(公告)日：2020-04-09

申请号：US16592870

申请日：2019-10-04

Applicant: DENSO CORPORATION

Inventor： Tomotaka SUZUKI ,  Yusuke SHINDO ,  Yasutaka SENDA ,  Ken TOSHIYUKI

IPC: H03K17/687

Abstract: A drive circuit drives switches that are connected to each other in parallel. The drive circuit includes individual discharge paths, a common discharge path, blocking units, a discharge switch, off-holding switches, and a drive control unit. The drive control unit selects, as target switches to be driven to be turned on, at least two switches among the switches. The at least two switches include a first switch and a second switch. The first switch is last to be switched to an off-state among the at least two switches that are selected as the target switches and switched to an on-state. The second switch is other than the first switch among the at least two switches. The off-holding switches includes a first off-holding switch and a second off-holding switch. After switching the second off-holding switch to an on-state, the drive control unit switches the discharge switch to an on-state.