摘要:
A LPF extracts DC component of a current detection value of an inverter input current. A subtracting section 4 calculates a difference between a current command value and the DC component of the current detection value. A current controller 5 produces two-phase PWM signals Sa and Sb complementary to each other, from the current difference. Further, an integrating circuit 7 integrates output terminal voltages Vu, Vv and Vw of the inverter to convert the output terminal voltages Vu, Vv and Vw into a magnetic-flux information Φu, Φv and Φw. A logic conversion section 8 converts the magnetic-flux information Φu, Φv and Φw into 120-degree conduction patterns S1′-S6′ to output the 120-degree conduction patterns S1′-S6′. Then, a logic circuit section 9 executes a logic synthesis between the PWM signals Sa and Sb and the 120-degree conduction patterns S1′-S6′ to output gate signals S1-S6.
摘要:
An electric device has a housing body (1) comprised of first and second housings (11, 12) and a motor (2) in the body (1). The housings (11, 12) are divided along one direction (A). The electric device includes first and second rings (6 and 7) that are attached to different first and second places on an outer circumferential surface of the housings (11 and 12), respectively, to combine them with each other. The first and second places correspond to first and second end sides of an axis of the motor (2), respectively.
摘要:
To effectively impart sizing performance to paper, while reducing the amounts of an internal sizing agent and aluminum sulfate, a papermaking additive comprises a mixture of an amphoteric copolymer having a hydrophobic group whose quaternization ratio is 40% by mole or more, and in which the ratio of the anion equivalent to the cation equivalent is 0.1 to 90%, and a calcium carbonate filler. The filler is one in which suitable water repellency is imparted to the filler. Hence, by adding this to pulp slurry, followed by a wet papermaking, the filler is efficiently adsorbed onto pulp fibers having anionic property, so that effective sizing performance can be imparted to the paper by using a smaller amount thereof than the internal sizing agent, while reducing the amounts of the internal sizing agent and the aluminum sulfate.
摘要:
An optical probe includes an optical probe main body and a covering member. The optical probe main body includes a light-emitting portion configured to emit laser light. The covering member is configured to cover a part of the optical probe main body from the light-emitting portion such that laser light from the light-emitting portion can be emitted to an outside, and to be detachable from the optical probe main body.
摘要:
An electronic watermarking embedding-processing section acquires layout information which specifies an embedding area of first sub information and an embedding area of second sub information in main image information. The electronic watermarking embedding-processing section performs overlapping processing for invisibly embedding the first sub information in the embedding area of the first sub information in the main image information which is specified by the layout information. The electronic watermarking embedding-processing section performs overlapping processing for invisibly embedding the second sub information in the embedding area of the second sub information in the main image information which is specified by the layout information. The electronic watermarking embedding-processing section creates composite image information by composing image information in which the first sub information is invisibly embedded in the main image information and image information in which the second sub information is invisibly embedded in the main image information.
摘要:
Provided is an optical body capable of arbitrarily and quickly controlling the optical characteristics of incident light. A refractive index variable layer (8) formed of PLZT or other material and a magneto-optical material layer (9) formed of garnet or other material are provided side by side between a first reflective layer (3) and a second reflective layer (5). If linearly polarized light is made incident from the side of the first reflective layer (3), the incident light interacts with the magneto-optical material layer (9) and is converted into a right-circularly polarized light component and a left-circularly polarized light component. A very small retardation occurring between both the right- and left-circularly polarized light components is amplified through multiple reflections between the pair of reflective layers (3, 5) and is controlled according to a controlled refractive index of the refractive index variable layer (8). If the left- and right-circularly polarized light components, the retardation between which is thus amplified and controlled, are made to interact with the magneto-optical material layer (9) again to recover the linearly polarized light, the plane of polarization rotates according to the retardation.
摘要:
A GT-cut crystal resonator that can be provided with a support portion having a small and simple configuration without adverse effect on vibration characteristics includes: a crystal plate formed in an elliptical shape with a major axis and a minor axis respectively corresponding to vibration directions of two longitudinal vibration modes orthogonal to each other in a GT-cut; and a support portion that supports the crystal plate, the support portion being connected to a position on an outer periphery of the crystal plate where a minimum vibration displacement is obtained when the two longitudinal vibration modes are coupled.
摘要:
A valve timing adjusting apparatus includes a housing, a vane rotor, and a fluid path arrangement. The fluid path arrangement is provided inside the housing. The fluid path arrangement opens to air outside the housing. The fluid path arrangement is communicated with a specific fluid chamber that is one of an advance fluid chamber and a retard fluid chamber defined within the housing. A rotational phase of the vane rotor relative to the housing is changed in one of advance and retard directions when hydraulic oil is introduced into the specific fluid chamber. The valve timing adjusting apparatus controls the fluid path arrangement to be opened and closed.
摘要:
A variable valve timing apparatus includes a variable valve timing mechanism that includes a first rotating body and a second rotating body that are rotating bodies that rotate about the same rotational axis; advance chambers and retard chambers that serve as hydraulic pressure chambers into which hydraulic fluid is supplied from an oil pump; and a discharge passage that discharges hydraulic fluid from the hydraulic pressure chambers. At least one of the hydraulic pressure chambers that is communicated with the discharge passage in a position vertically higher than the rotational axis when the first rotating body and the second rotating body have stopped rotating at a given phase, and from which hydraulic fluid is discharged into the discharge passage, is placed in a state constantly open to ambient air regardless of the phase at which the first rotating body and the second rotating body have stopped.
摘要:
There is provided an electrode structure to be electrically connected to a connection conductor by being bonded thereto with an anisotropic conductive adhesive mainly composed of a thermosetting resin, the electrode structure including an electrode for connection using an adhesive, the electrode being arranged on a base material, and an organic film serving as an oxidation preventing film configured to cover a surface of the electrode for connection using an adhesive, in which the organic film has a higher decomposition temperature than the maximum temperature of heat treatment to be performed. A wiring body and a connecting structure using an adhesive are also provided.