The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
For various assistive devices, safe and compact high output actuators are desired. The authors have proposed a helical motor that consists of a helical mover and stator. In the latest study, a motion controller of a helical motor is based on PD-control law and disturbance observer. However, the performance of the conventional controller is not enough to achieve more high preciesion motion and robustness...
This paper describes the design, construction and testing of a 750-V, 100-kW, 20-kHz bidirectional isolated dual-active-bridge dc-dc converter using four 1.2-kV 400-A SiCMOSFET/SBD dual modules. The maximum conversion efficiency from the dc-input to the dc-output terminals is accurately measured to be as high as 98.7% at 42-kW operation. The overall power loss at the rated-power (100 kW) operation,...
This paper investigates three zero power control methods for a helical motor, which are current integral type, external force feedback type, and current integral with feedforward type. A helical motor is a linear motor having helical mover and stator that can realize a high thrust force density and high back-drivability. The magnetic levitation control, position control and force control were archived...
This paper investigates two zero power control methods for a spiral motor, which are current integral type and external force feedback type. A spiral motor is a linear motor having helical mover and stator that can realize a high thrust force density and high back-drivability. In latest researches, the magnetic levitation control, position control and force control were archived. Additionally, power-saving...
This paper validates parameter identification of a spiral motor by FEA and experiments with least square method. Validity of the identification is discussed in simulations and experiments. Parameters of the spiral motor is utilized to design controller so as to achieve a maximum performance of the spiral motor. In this paper, the parameters are analyzed and compared between FEA and experiments. As...
We investigate the mechanism for the data retention degradation caused by program/erase (P/E) cycling in MONOS memories, using the carrier separation measurement to identify the carrier type of Stress-Induced Leakage Current (SILC). It is thereby found that SILC is composed mainly of holes for the MONOS with less Si-rich SiN layer (hole SILC). A clear correlation is also discovered between hole SILC...
Vth control technology of HfSiON gate dielectrics by channel engineering using counter ion implantation method and fluorine or nitrogen ion implantation method are described. Current Ni-FUSI gate technology is also mentioned. Moreover, the authors explain breakdown mechanism of poly-Si/HfSiON/SiO2 gate stacks
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.