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。

公开(公告)号：US20170019020A1

公开(公告)日：2017-01-19

申请号：US15208609

申请日：2016-07-13

Applicant: FANUC Corporation

Inventor： Masataka TSUCHIMOTO ,  Shouhei KOBAYASHI

IPC: H02M3/04 ,  G05B15/02

CPC classification number: G05B15/02 ,  H02M1/32 ,  H02M1/36 ,  H02M3/157 ,  H02M3/33515 ,  H02M2001/008

Abstract: In a digitally controlled power source, a setting value of an output voltage therefrom is set in advance in the vicinity of an upper limit within a tolerable range of fluctuation. Even if a voltage drop is caused by starting currents that flow upon initial rise of DC-DC converters in a subsequent stage, such setting makes it possible to confine values of the output voltage within the tolerable range of fluctuation because the setting value of the output voltage is set in advance at a relatively high value. Accordingly, the starting currents in the DC-DC converters can be increased without restriction so that rise time for the power source can be shortened.

Abstract translation: 在数控电源中，其输出电压的设定值预先设定在可容忍的波动范围内的上限附近。 即使由于后续阶段的DC-DC转换器的初始上升而起动的电流引起电压降，所以这种设定使得可以将输出电压的值限制在容许的波动范围内，因为输出的设定值 预先设定电压为相对高的值。 因此，可以不限制地增加DC-DC转换器中的启动电流，从而可以缩短电源的上升时间。

公开(公告)号：US20190154752A1

公开(公告)日：2019-05-23

申请号：US16173047

申请日：2018-10-29

Applicant: FANUC CORPORATION

Inventor： Masataka TSUCHIMOTO

IPC: G01R31/28 ,  H05K1/02

Abstract: An abnormal state latch unit comprises: an detection circuit that masks an abnormality position signal; a timer circuit that starts motion when the abnormality position signal indicates the occurrence of an abnormality based on the abnormality position signal, and completes the motion and outputs a reset signal after passage of a predetermined period; and a latch circuit that latches the abnormality position signal output from the detection circuit when the reset signal is output. The detection circuit masks the abnormality position signal when the latch circuit makes latching motion to disable an output from the detection circuit. The timer circuit masks an input to the timer circuit when the latch circuit makes the latching motion to maintain a state indicating completion of the motion. Abnormality voltage signals generated by an signal generation circuit are wired-OR connected and supplied through a single signal line to a monitor circuit.