公开(公告)号：US20230318507A1

公开(公告)日：2023-10-05

申请号：US18192766

申请日：2023-03-30

Applicant: SEIKO EPSON CORPORATION

Inventor： Junpei NAKAYAMA

IPC: H02P27/08 ,  H02P23/26

CPC classification number: H02P27/08 ,  H02P23/26 ,  H02P2201/03 ,  H02P2201/11 ,  H02P2201/15

Abstract: A control apparatus includes a drive circuit unit to which regenerative electric power is input, a discharge resistance unit parallel-coupled to the drive circuit unit, to which the regenerative electric power is input from the drive circuit unit, and, when a voltage value of the regenerative electric power exceeds a threshold value, consuming electric power, a second converter circuit unit parallel-coupled to a first converter circuit unit and converting and outputting an alternating current into a direct current, a step-down circuit unit stepping down and outputting a voltage of the current output from the second converter circuit unit, an energization control circuit unit actuated by the direct current and controlling the drive circuit unit, and a regenerative electric power supply unit having a regenerative diode coupled to the discharge resistance unit and outputting a direct current of the regenerative electric power to the step-down circuit unit.

公开(公告)号：US20220410377A1

公开(公告)日：2022-12-29

申请号：US17849769

申请日：2022-06-27

Applicant: SEIKO EPSON CORPORATION

Inventor： Junpei NAKAYAMA

IPC: B25J9/12 ,  H02P27/06 ,  B25J9/00 ,  B25J9/04

Abstract: A motor drive circuit for a robot includes a switching unit switching among a normal state in which regenerative power is supplied to a regenerative capacitor, a first state in which a voltage is applied to a first resistor, and a second state in which a voltage is applied to the first resistor and a second resistor based on a detection result of a detection unit, wherein the switching unit switches to the first state when the voltage applied to the regenerative capacitor detected in the detection unit is equal to or larger than a first threshold in the normal state, and switches to the second state when the voltage applied to the first resistor is equal to or larger than a second threshold larger than the first threshold in the first state.

公开(公告)号：US20240322689A1

公开(公告)日：2024-09-26

申请号：US18608982

申请日：2024-03-19

Applicant: SEIKO EPSON CORPORATION

Inventor： Kosuke ICHIYANAGI ,  Junpei NAKAYAMA

IPC: H02M3/158 ,  H02M1/00 ,  H02M1/14

CPC classification number: H02M3/158 ,  H02M1/0022 ,  H02M1/143

Abstract: A robot controller having a power supply circuit supplying power to a motor of a robot, includes a capacitor, a discharge resistor discharging electric charge stored in the capacitor, a first switch element passing and interrupting a current flowing in the discharge resistor, a first voltage detection unit detecting a voltage at a primary side of the power supply circuit, and a first control unit controlling on and off of the first switch element based on a detection result of the first voltage detection unit. Further, the first control unit sets the first switch element to be continuous to pass a current in the discharge resistor when the voltage detected by the first voltage detection unit is equal to or lower than a first threshold.

公开(公告)号：US20170187184A1

公开(公告)日：2017-06-29

申请号：US15386093

申请日：2016-12-21

Applicant: SEIKO EPSON CORPORATION

Inventor： Junpei NAKAYAMA ,  Ryohei HORITA

IPC: H02J1/00 ,  H02M7/04 ,  H02J7/00

CPC classification number: H02J7/0065 ,  H02J7/0024

Abstract: A power source is configured to include a plurality of batteries and a switching circuit that switches a state to and from a first state in which the electric power is supplied to the outside by the plurality of batteries being connected in series and a second state in which the electric power is supplied to the outside using remaining batteries without using a part of the plurality of batteries.