-
公开(公告)号：US20240291399A1
公开(公告)日：2024-08-29
申请号：US18574573
申请日：2022-06-21
Applicant: KYOSAN ELECTRIC MFG. CO., LTD.
Inventor： Itsuo Yuzurihara , Tomohiro Yoneyama , Shohei Kobayashi , Yu Hosoyamada
IPC: H02M7/5387
CPC classification number: H02M7/5387
Abstract: A pulse width modulation control according to the present invention is performed such that, when changing a modulation rate of a modulation wave, the modulation rate is continuously changed from a normal modulation region to an overmodulation region, and, the modulation rate is controlled not to be discontinuous between the normal modulation region and the overmodulation region. In the overmodulation region, limiting the modulation rate α prevents a jump phenomenon in pulse width from occurring and the continuity of the pulse width from disappearing due to the jump phenomenon. The upper limit αupper of the modulation rate α is a threshold at which the pulse width of a PWM pulse signal jumps to a duty ratio of 50%, and limits the modulation rate α to less than the threshold.
-
公开(公告)号：US12040158B2
公开(公告)日：2024-07-16
申请号：US17908797
申请日：2021-03-04
Applicant: KYOSAN ELECTRIC MFG. CO., LTD.
Inventor： Takeshi Fujiwara , Hiroyuki Kojima , Satoshi Kawai
IPC: H01J37/32
CPC classification number: H01J37/32146 , H01J37/32174
Abstract: Provided are a high-frequency power supply device and an output control method therefor which are capable of constantly keeping the phase of the outputted high-frequency pulse uniform even in a structure in which the synchronizing pulse and the clock pulse are generated separately. A high-frequency power supply device and an output control method therefor for outputting a high-frequency pulse to a target device on the basis of a synchronizing pulse and a clock pulse, wherein: the period interval of one period of the synchronizing pulse is detected; the phase difference between the synchronizing pulse and the clock pulse during the previous one period is determined; the number of pulses and oscillation frequency of oscillation in the subsequent period is calculated on the basis of the period interval and the phase difference; a clock pulse is generated on the basis of the oscillation frequency signal; and a number of pulses and oscillation frequency for the subsequent period which will cancel the phase difference in the previous one period are determined in a manner such that the phase remains constant after the period interval of the subsequent period elapses when forming a high-frequency pulse on the basis of the period reference signal, the level setting signal, the pulse number signal and the clock pulse.
-
公开(公告)号：US12014899B2
公开(公告)日：2024-06-18
申请号：US17911174
申请日：2021-03-04
Applicant: KYOSAN ELECTRIC MFG. CO., LTD.
Inventor： Takeshi Fujiwara , Yuya Yasuda , Ryuhei Katafuchi , Hiroyuki Kojima
IPC: H01J37/32
CPC classification number: H01J37/32146 , H01J37/32174 , H01J2237/327
Abstract: A high-frequency power supply device, which outputs high-frequency pulses to a target device on the basis of a synchronous pulse and a clock pulse, and the output control method therefor are such that a period reference signal is generated from output timing information pertaining to the synchronous pulse, an output level signal is generated from output level information, an output stop time is timed on the basis of the period reference signal and an output stop signal is generated, and, when the period reference signal, the output level signal, and the clock pulse are received and a high-frequency pulse is formed on the basis of these signals, transmission of the output level signal is stopped while the output stop signal is being received.
-
4.发明授权公开(公告)号：US11884313B2
公开(公告)日：2024-01-30
申请号：US16996072
申请日：2020-08-18
Applicant: KYOSAN ELECTRIC MFG. CO., LTD.
Inventor： Toshio Kitajima , Youichi Murakami
Abstract: A railroad equipment state determination apparatus includes: a storage that stores a plurality of operation data associated with a prescribed operation performed by railroad equipment that is driven by a motor from a stopped state to perform the prescribed operation and then comes into the stopped state again; an evaluation criteria setting section that sets evaluation criteria based on the plurality of operation data stored in the storage; and a determination section that determines whether new operation data resulting from the prescribed operation newly performed by the railroad equipment is abnormal based on the evaluation criteria.
-
5.发明授权公开(公告)号：US11764666B2
公开(公告)日：2023-09-19
申请号：US17602074
申请日：2019-11-08
Applicant: KYOSAN ELECTRIC MFG. CO., LTD.
Inventor： Itsuo Yuzurihara , Toshiyuki Adachi , Tomohiro Yoneyama , Koichi Miyazaki
Abstract: This DC pulse power supply device comprises a voltage clamper including a capacitor that is connected in parallel to a DC reactor in a chopper circuit provided in a pulsing unit in order to suppress increases in the surge voltage resulting from the leakage inductance of the DC reactor. During the start-up of pulsing operation, which is the initial stage of the pulse mode, the frequency of the pulsing operation of the chopper circuit is controlled over the period until the capacitor voltage is charged to a sufficient voltage to reset the magnetic saturation of the DC reactor.
-
Patent Agency Ranking
公开(公告)号：US11368088B2
公开(公告)日：2022-06-21
申请号：US16473404
申请日：2017-02-23
Applicant: KYOSAN ELECTRIC MFG. CO., LTD.
Inventor： Itsuo Yuzurihara , Ryosuke Ohma , Hiroshi Kunitama , Yu Hosoyamada
Abstract: Provided is multi-phase interleaving control in a power supply device, the control allowing the pulse widths ΔT of respective phases to overlap one another, so as to be adaptable to wideband pulse power control. In applying dead beat control to the multi-phase interleaving, constant current control is performed using combined current of the respective phase current values, and the pulse widths ΔT(k) is computed under this constant current control, thereby preventing variation of the pulse widths ΔT(k) between the phases, and achieving stable power control. Accordingly, the pulse power control becomes adaptable to wideband. Furthermore, wideband control is possible also in two-level pulse power control that performs control by switching at high frequency between High-level power and Low-level power.
-
公开(公告)号：US20220094269A1
公开(公告)日：2022-03-24
申请号：US17422485
申请日：2019-11-08
Applicant: KYOSAN ELECTRIC MFG. CO., LTD.
Inventor： Itsuo Yuzurihara , Toshiyuki Adachi , Tomohiro Yoneyama , Koichi Miyazaki
IPC: H02M3/335
Abstract: A DC pulse power supply device (1) includes: a DC power supply (10); a pulsing unit (20A) that generates a pulse output using a step-up chopper circuit connected to the DC power supply; and a regeneration unit (30). The regeneration unit regenerates, to the DC power supply, the voltage component among a reactor voltage (VDCL) of a DC reactor (21A) in the step-up chopper circuit exceeding a set voltage. Thus, the voltage of the step-up chopper circuit is clamped to a prescribed voltage to suppress excessive voltage increases. Moreover, resistor energy consumption is eliminated and the efficiency of supplying power to a load is boosted by regeneration to the DC power supply.
-
公开(公告)号：US10967888B2
公开(公告)日：2021-04-06
申请号：US16185276
申请日：2018-11-09
Applicant: KYOSAN ELECTRIC MFG. CO., LTD.
Inventor： Toshifumi Nishi , Tamotsu Yokoyama , Tomonori Itagaki , Kenji Mizuno
Abstract: At an on-board control unit of an on-board apparatus, a coupling detecting unit detects coupling of a failure train with respect to the own train. Then, in the case where detection is performed by the coupling detecting unit, a train occupancy range calculating unit updates train length information using the number of vehicles of the failure train and uses the updated train length information to calculate train occupancy range information. Further, a traveling control unit controls traveling and stop of the own train as a series of coupled trains in the case where detection is performed by the coupling detecting unit.
-
公开(公告)号：US10924007B2
公开(公告)日：2021-02-16
申请号：US16471898
申请日：2017-02-23
Applicant: KYOSAN ELECTRIC MFG. CO., LTD.
Inventor： Itsuo Yuzurihara , Ryosuke Ohma , Hiroshi Kunitama , Yu Hosoyamada
Abstract: Multi-phase interleaving control in a power supply device is accelerated. In addition, in accelerating the multi-phase interleaving control in the power supply device, acceleration in detecting a feedback signal and stabilization of a control system in a high-frequency band are promoted. Eliminating the need of the feedback signal according to a slow response detector, and using a detection signal obtained by a detector for detecting an AC signal capable of rapid response, thereby accelerating the multi-phase interleaving control in the power supply device. Then, the control system is stabilized, by satisfying a condition where gain is equal to 1 or less in a transfer function of the control system including an LC circuit, and a condition where a phase shift caused by dead time of switching time does not affect the sampling cycle.
-
公开(公告)号：US20190092349A1
公开(公告)日：2019-03-28
申请号：US16137931
申请日：2018-09-21
Applicant: KYOSAN ELECTRIC MFG. CO., LTD.
Inventor： Ikuo SAKURAI
IPC: B61B1/02
Abstract: A first link mechanism section converts linear motion of a driving slider into swing motion of a swing end roller. A second link mechanism section swings in cooperation with the swing end roller on a roller contact surface of a second link lever section, and an output end roller changeable in attachment position presses a driven slider fixed to a gap filler plate. In a fully protruded state and a fully stored state of the gap filler plate, the direction of acting force of the roller contact surface pressing the swing end roller aligns with a straight line connecting the swing end roller and a swing shaft of a first link lever section.
-
-
-
-
-
-
-
-
-
Search Results
113
records
(took 0.04 seconds)
