摘要:
A disk drive with means to prevent accidental landing of a head/slider on the disk surface is described. In one embodiment a shock sensor is provided to sense external shocks received by the mechanism. During loading (positioning) of the actuator bearing the head/slider over the disk, if a shock is sensed, loading is stopped and an immediate unloading is performed to return the actuator to the withdrawn position. In another embodiment the unload operation is performed when the rotational speed of the disk is changed. In another embodiment the unload operation is performed when the rotational speed of the disk drops below a threshold. A circuit and method for detecting when the rotational speed of the disk drops below a threshold is also provided. The unloading in the various embodiments may be performed using velocity control or without velocity control.
摘要:
A position control system for a magnetic head improves servo tracking characteristics in a low frequency range without impairing the stability of seek operations. The position control system is equipped with two integrators: a first integrator 43 and second integrator 45. The gain K3′ of the second integrator 45 is set larger than the gain K3 of the first integrator 43. The first integrator 43 plays the role of offsetting the bias force acting on the magnetic head while the second integrator 45 plays the role of improving the servo tracking characteristics in the low frequency range.
摘要:
A process, apparatus, and system are disclosed for inhibiting erroneous control signals due to disruptive electromagnetic signals. In one embodiment, the invention prevents erroneous information writing in a recording device under the effect of background electromagnetic waves. A conductor pattern is formed on a printed wiring board on which wiring constituting a control circuit of a hard disk drive is formed. Background electromagnetic waves are detected by an electromagnetic wave detection circuit. In the case where an electromagnetic wave signal detected by the electromagnetic wave detection circuit exceeds a predetermined power, voltage, or current threshold, a write gate signal is turned off to inhibit a potential write operation.
摘要:
An electronic device that exercises control over processes arbitrary in number for execution using a control program, including: storage means for forming each of the processes for execution by the electronic device with any of various combinations of a plurality of unit processes, creating, for each of the processes, the control program for use by the electronic device to execute the processes by a unit program for execution of the unit processes and a process step table in which an execution sequence of the unit programs is defined, storing the process step table for each of the processes, and storing the unit programs listed in each of the process step tables; and execution means for executing, in the defined execution sequence, when any predetermined one of the processes is directed, the unit programs defined in any of the process step tables stored corresponding to the directed process.
摘要:
A method of the present invention, for driving a liquid crystal display device includes the step of applying, when spray-bend transition of liquid crystal molecules is completed, a constant voltage to a storage capacitor electrode so that an electric potential difference between a pixel electrode and a common electrode becomes greater than an electric potential difference between the pixel electrode and another pixel electrode adjacent to said pixel electrode when application of a voltage for the spray-bend transition of the liquid crystal molecules is stopped.
摘要:
A fuel cell two-wheel vehicle is provided with: a fuel cell, fuel tanks, a supercharger, a pipe line, an in-wheel motor, and a motor driver. The fuel cell generates electric power using hydrogen and air as reaction sources. The fuel tanks supply hydrogen to the fuel cell through a hydrogen supply path. The supercharger supplies air from the outside air to the fuel cell. Through the pipe line, an exhaust from the fuel cell is discharged to the outside. The in-wheel motor serves as a driving source of the fuel cell two-wheel vehicle, and the motor driver drives the in-wheel motor. In an air system, a route and an outlet of the pipe line are arranged to be directed toward the motor driver. Thus, a heat sink is exposed to the discharged air having passed through the fuel cell, and thereby the motor driver is cooled.
摘要:
The invention is characterized in that in a motor rotor constituted by a motor shaft (30), a permanent magnet (31) surrounding the motor shaft (30) around an axis, a pair of end rings (32, 32) surrounding the motor shaft (30) around the axis and pinching the permanent magnet (31) from both sides in an axial direction, and a hollow cylindrical outer sleeve (33) surrounding the permanent magnet (31) and a pair of end rings (32, 32) in a fastening state around the axis, one end portion or both end portions of the outer sleeve (33) protrudes in the axial direction than an end surface of the end ring (32). A rotating balance correction is executed by pruning away a part of the protruding portion.
摘要:
An internal combustion engine includes a continuously variable transmission chamber formed of a crank case and a cover member connected to the crank case to permit the use of oil different between the internal combustion engine and the continuously variable transmission. Thereafter, a sufficient amount of each oil is ensured to not reduce the lowest road clearance. A division wall divides an interior of an oil pan into an internal combustion engine side oil reservoir and a continuously variable transmission side oil reservoir that reserves oil for lubrication of a continuously variable transmission and for speed control thereof, and which is connected to a lower portion of a crank case. The continuously variable transmission side oil reservoir is formed in a width direction of the motorcycle wherein part of continuously variable transmission side oil reservoir expands more outwardly than a continuously variable transmission chamber.
摘要:
An active matrix substrate is provided to be opposed to a counter substrate with a liquid crystal layer therebetween, the liquid crystal layer being in an OCB mode in which orientation is spray orientation when no voltage is applied and the orientation is changed to bend orientation when a voltage is applied. A storage capacitor bus line is provided on a pixel electrode so as to be opposite to the counter substrate and an opening is provided at a part of the pixel electrode at a region where the pixel electrode and the storage capacitor bus line intersect. A liquid crystal control circuit and a relay circuit are provided for applying a transition voltage to the storage capacitor bus line so as to apply an electric field between the pixel electrode and the storage capacitor bus line, and after a certain period in which liquid crystal molecules have responded, applying a transition voltage to the counter electrode so as to apply an electric field between the pixel electrode and the counter electrode.
摘要:
A particulate filter regeneration system regenerates a particulate filter provided in an exhaust line of an engine equipped with a turbocharger by burning matter trapped on the particulate filter by raising the temperature of exhaust gas at times that the particulate filter requires regeneration. The system has an electric motor functioning as an intake quantity regeneration portion capable of increasing the flow rate of compressed air without depending on the flow rate of exhaust gas flowing across a turbine of the turbocharger, a bypass line connecting an engine intake line upstream of the engine to a section of the exhaust line upstream of the particulate filter, a flow rate regulation valve regulating the flow rate in the bypass line, and a control portion controlling the electric motor and the flow rate regulator.