公开(公告)号：US20240006989A1

公开(公告)日：2024-01-04

申请号：US18039398

申请日：2022-01-06

Applicant: FANUC CORPORATION

Inventor： Kazuya GOTO ,  Yoshinori SAKAI

IPC: H02M3/00 ,  H02M3/335 ,  H02M1/32 ,  H02M1/00

CPC classification number: H02M3/01 ,  H02M3/33569 ,  H02M1/325 ,  H02M1/0022

Abstract: The resonance power supply circuit is provided with a transformer provided with primary and secondary winding wires, first and second switching elements for applying a rectangular wave voltage to one end of the primary winding wire, a resonance capacitor connected to the other end of the primary winding wire, and a control unit that alternately turns on and off the first and second switching elements. The resonance power supply circuit is further provided with a first output circuit including first and second rectification elements, a first capacitor, an output capacitor, and a backflow prevention rectification element, a second output circuit including third and fourth rectification elements, a second capacitor, the output capacitor, and a third switching element provided between the second capacitor and the output capacitor, and a circuit for providing, as feeding back, voltage information indicating a first voltage of the first capacitor to the control unit.

公开(公告)号：US20180358803A1

公开(公告)日：2018-12-13

申请号：US16006412

申请日：2018-06-12

Applicant: FANUC CORPORATION

Inventor： Shuuji KUDOU ,  Yoshinori SAKAI

IPC: H02H7/12 ,  H02H1/00

Abstract: A unit having a power supply circuit that converts an input voltage from an input power supply to a predetermined output voltage, includes: an output terminal configured to output the output voltage to the outside of the unit; a switch provided between the power supply circuit and the output terminal; and a switch control part configured to turn off the switch when the input voltage is not applied from the input power supply and turn on the switch when the input voltage is applied.

公开(公告)号：US20240162845A1

公开(公告)日：2024-05-16

申请号：US18549175

申请日：2022-03-09

Applicant: FANUC CORPORATION

Inventor： Tetsuro MATSUDAIRA ,  Yoshinori SAKAI ,  Shuuji KUDOU ,  Yoshikiyo TANABE ,  Toshihiro FUJIMORI

IPC: H02P27/08 ,  H02M1/00 ,  H02P29/024

CPC classification number: H02P27/08 ,  H02M1/007 ,  H02P29/024 ,  H02P2201/07

Abstract: A motor control device includes a DC/DC converter that steps up or steps down a voltage of a direct current power source and performs charging, while controlling an inrush current to a smoothing capacitor; a monitor circuit for the output of the DC/DC converter; and a control part that turns the operation of the DC/DC converter on and off, and turns the DC/DC converter off when the monitor circuit has detected an abnormality.

公开(公告)号：US20150349642A1

公开(公告)日：2015-12-03

申请号：US14725152

申请日：2015-05-29

Applicant: Fanuc Corporation

Inventor： Yoshinori SAKAI ,  Masataka TSUCHIMOTO

IPC: H02M3/158

CPC classification number: H02M3/158 ,  H02M3/1563 ,  H02M3/157 ,  H02M2001/008

Abstract: In a DC/DC converter, each channel operates under digital control using nonlinear control. The time interval between the time of turning ON of the switching element 1 and the time of turning ON of each of other switching elements j (j=2, 3, . . . , N) is measured. If the measured interval is within a specified range, operation is continued without changing the ON time of the switching element j used last time. Meanwhile, if the measured interval is out of the range, the ON time of the switching element j is increased or decreased within a predetermined range to be shifted from a basic frequency. Thus, the interval between the time of turning ON of the switching element 1 and the time of turning ON of the switching element j is brought back to the specified range.

Abstract translation: 在DC / DC转换器中，每个通道使用非线性控制在数字控制下运行。 测量开关元件1的接通时间和其他开关元件j（j = 2,3，...，N）中的每个导通时间之间的时间间隔。 如果测量间隔在规定的范围内，则不改变上次使用的开关元件j的导通时间，继续进行动作。 同时，如果测量的间隔超出该范围，则开关元件j的接通时间在预定范围内增加或减小以从基本频率偏移。 因此，开关元件1的接通时间与开关元件j的接通时间之间的间隔被恢复到指定范围。