摘要:
The present invention provides a motor drive apparatus capable of calculating an angular velocity and a rotation angle accurately in the entire rotation velocity range of a motor using a cheap Hall sensor having an inferior accuracy without using an expensive resolver having a high accuracy. The present invention includes a first angular velocity calculating means for calculating the angular velocity based on the back-EMF of the motor when it rotates at low speeds and a second angular velocity calculating means for calculating the angular velocity based on a signal from the Hall sensor when it rotates at high speeds. According to the present invention, the angular velocity and rotation angle can be calculated accurately in the entire rotation speed range using the Hall sensor under hybrid usage.
摘要:
A wireless operating system, which is used with a mobile telephone, for wirelessly operating an operated target, includes: an adapter including transmitting means for allowing operation information required for an operation of the operated target to be transmitted by short distance radio; a short distance wireless unit having receiving means for receiving the operation information and operating means for operating the operated target in accordance with the received operation information; and an operated target control unit. The adapter further includes: communication means capable of performing direct communication with the mobile telephone by being carried with the mobile telephone; and operation information generating means for generating operation information in accordance with portable communication terminal information acquired from the mobile telephone. Under the circumstances where a user carries the mobile telephone, it is possible to provide a wireless operating system in which various operated targets and the mobile telephone are wirelessly operated.
摘要:
In a vibration isolating mount having a toe correcting mechanism (5) and installed with bored portions (21) and an axial stopper (6) in a rubber-like elastic body (4) between an inner and an outer cylinder (2) and (3), as the stopper (6), a portion of the outer cylinder on a side opposed to the toe correcting mechanism (5) interposing the inner cylinder (2) is extended in the axial direction and stopper rubber (4c) is arranged at a front end of the extended portion (13) by which a rubber vulcanizing mold can be divided in an upper and a lower portion thereof even with the bored portion (21), simplification of mold structure is achieved and light-weighted formation and durability of the mount are promoted.
摘要:
A closure assembly for sealed batteries in which explosion-proof features are incorporated. A metal plate (8) having a hole (81), an insulating resin sheet (9), a metal thin sheet (6b), an insulating sheet (4) having an air hole (41), a metal guide plate (3) having a hole (31), and a metal cap (1b) are laid upon one another within an insulating gasket (5b). Metal plate (8) and metal guide plate (3) are in contact with each other and electrically connected. Upon a build-up of pressure within the battery, the insulating-resin sheet (9) expands and ruptures, whereby a narrow part (69) provided in the metal thin sheet (6b) positioned above the insulating resin sheet (9) breaks, thus cutting supply of electric current.
摘要:
An ink jet head has a plurality of ink pressure chambers defined therein and a surface to which a plurality of ink pressure chambers open. An orifice plate having an orifice therein is bonded to the surface. When manufacturing the ink jet head, a coating of an insulating material is first formed on an inner wall of the ink pressure chambers and subsequently a re-dissolvable curingresin is applied to the ink jet head in an area from the inner walls to the surface. Then, the coating and the resin deposited on the surface are removed from the surface. Then, the resin deposited on the coating in the ink pressure chambers is dissolved to remove the resin from the inner wall. Finally, the orifice plate is bonded to the surface.
摘要:
To provide a controller of an electric power-steering system, capable of improving the steering performance by presuming a motor angular speed .omega. in a range in which the angular speed of a motor is small and moreover very accurately presuming the motor angular speed and thereby, completely showing the functions for compensating the inertia of the motor and controlling the astringency of a vehicle. Because the presumed error of a back electromotive force between a model motor and a motor to be actually mounted is proportional to a motor current, a dead zone of a motor angular speed having a width proportional to a motor current is set to the presumed value of the motor angular speed. When the motor current is small, the width of the dead zone also decreases. Therefore, it is possible to presume an angular speed .omega. even in a region where the motor angular speed is small. Moreover, a motor angular speed is presumed by defining impedance models of motor driving systems in an intermittent mode and a continuous mode.
摘要:
An inner chamber is arranged inside an outer chamber and stores quartz crystal powder. A space is defined between the inner chamber and the outer chamber, and an oxygen gas is introduced into that space. The quartz crystal powder is supplied from the inner chamber into a burner section, together with the oxygen gas. The burner section is also supplied with a flammable gas from a gas control device. The flammable gas contains an NH.sub.3 gas. The heat produced by the combustion of the flammable and oxygen gases fuses the quartz crystal powder supplied from the inner chamber into the burner section. As a result, quartz containing nitrogen is produced. The nitrogen is contained in the fused quartz in an amount which is expressed as 1 to 10% by molar ratio.
摘要:
A multifunctional information processing apparatus includes a selection unit consisting of a CRT display and a touch panel, for selecting a desired function of a plurality of executable functions, a plurality of function programs for executing different functions, respectively, a memory for storing data formed upon execution of the function program selected by the selecting unit so as to allow subsequent use of the data by other function programs, and a CPU for controlling to cause another function program selected by the selecting unit to utilize the data stored in the memory.
摘要:
Soybean milk is treated with protease at a pH in the range which does not cause acid coagulation in the presence of a magnesium salt as a concentration in the range which does not substantially cause magnesium coagulation, to flocculate protein in soybean milk, thereby a food material having good mouthfeel and high processability may be obtained.
摘要:
A process for acetylating a wood material which comprises impregnating the wood material with an aqueous solution of an alkali metal acetate, drying the wood material containing the alkali metal acetate solution, and treating the dried wood material with acetic anhydride optionally diluted with an organic solvent at temperature between 100.degree. C. and 150.degree. C.