Abstract:
[Problems]To provide a non-contact power feeder that is high efficient and high power factor and has no load dependence.[Means for Solving Problems]A series capacitor Cs1 is connected to a primary winding 1 driven by an AC power supply 3 and a parallel capacitor Cp2 is connected to a secondary winding 2. The capacitance Cp is set to Cp≈1/{2πf0×(x0+x2)} and the capacitance Cs converted to the primary side is set to Cs≈(x0+x2)/{2πf0×(x0×x1+x1×x2+x2×x0)}, where f0 is the frequency of the power supply, x1 is a primary leakage reactance of the primary winding 1, x2 is a secondary leakage reactance of the secondary winding 2 converted to the primary side and x0 is an excitation reactance converted to the primary side. By setting Cp and Cs to the above values, the transformer of the non-contact power feeder is substantially equivalent to an ideal transformer. If it is driven by a voltage type converter, the output voltage (=load voltage) becomes substantially constant voltage regardless of the load. In case of a resistive load (ZL=R), the power factor of the power supply output always remains 1 even if the load may vary.
Abstract:
A capacity management method of managing a capacity of a storage unit of each storage in a computer system having a plurality of storage devices each having one or more storage units each providing one or more storage areas. The method includes the steps of: detecting a storage area relation between a first storage area and a second storage area; and calculating an estimated capacity necessary for the storage unit in accordance with a detection result.
Abstract:
[Problems] To provide a series electric double-layer capacitor device having a simple structure eliminating nonuniform voltages induced among electric double-layer capacitors (C1 to C6).[Means for Solving Problems] A series electric double-layer capacitor device comprises 2n capacitors (C1 to C6), 2n diodes (D1 to D6), a transformer (T1), and an inverter (31). Secondary wirings (N1 to N3) of the transformer supply the induced voltages to a capacitor module (30) composed of sets of two capacitors and two diodes. The capacitors are charged when the diodes included in the capacitor module are conductive. The series electric double-layer capacitor device further comprises voltage adjusting means (32) for changing the DC voltage level between terminals (1, 2), and the inverter converts the voltage-changed DC voltage into an AC voltage. A voltage for canceling the forward voltage drops of the diodes is added to the induced voltages of the secondary wirings by the operation of the voltage adjusting means. The influence of the diodes of when the capacitors are charged is eliminated, and the voltages among capacitors are made uniform.
Abstract:
A power transmitting device includes power transmitting coils, which contactlessly transmit electric power to a power receiving coil, and a switching device. When the power receiving coil is a solenoid coil, the switching device connects the power transmitting coils in parallel with each other such that magnetic fluxes generated inside the power transmitting coils flowing in the same direction along a winding axis. When the power receiving coil is a circular coil, the switching device connects the power transmitting coils in series with each other such that magnetic fluxes generated inside the power transmitting coils flowing in opposite directions along the winding axis.
Abstract:
According to one embodiment, contactless power transfer apparatus includes: transmission coil; primary capacitor; reception coil opposing transmission coil through gap; and secondary capacitor. Specification of frequency of the transmission coil and that of the reception coil are equal. At least one of electrical power specification and gap length specification of the transmission coil differ from the reception coil. When the electrical power specification of the power transmission coil differ from that of the power reception coil, the power is supplied from the transmission coil to the reception coil by using smaller one of the power of the transmission coil and of the reception coil as maximum power. When the gap length specification of the transmission coil differs from that of the reception coil, the transmission coil opposes the reception coil through the gap length, which is the specification of the transmission coil.
Abstract:
A defect inspection apparatus includes: stages each mounting an inspecting object on which a circuit pattern having a group of parallel lines is formed, and each running perpendicular or parallel to the group of lines; an illumination optical system which illuminating a surface of the inspecting object with a slit beam being slit light so that a longitudinal direction of the slit beam is substantially perpendicular to the running directions of the stages, and which has a first inclined angle formed by the direction of the group of lines and a projection line, of an optical axis of the slit beam, to the inspecting object; a spatial filter that shields or transmits reflected and scattered light of the inspecting object according to a difference in distribution of orientation; and a detection optical system that detects the reflected and scattered light transmitted through the spatial filter by image sensors. Moreover, the illumination optical system illuminates the inspecting object with another slit beam from a direction opposite to an incident direction of the slit beam on a plane.
Abstract:
[Problems] To provide a non-contact power feeder that is high efficient and high power factor and has no load dependence.[Means for Solving Problems] A series capacitor Cs1 is connected to a primary winding 1 driven by an AC power supply 3 and a parallel capacitor Cp2 is connected to a secondary winding 2. The capacitance Cp is set to Cp≈1/{2πf0×(x0+x2)} and the capacitance Cs converted to the primary side is set to Cs≈(x0+x2)/{2πf0×(x0×x1+x1×x2+x2×x0)}, where f0 is the frequency of the power supply, x1 is a primary leakage reactance of the primary winding 1, x2 is a secondary leakage reactance of the secondary winding 2 converted to the primary side and x0 is an excitation reactance converted to the primary side. By setting Cp and Cs to the above values, the transformer of the non-contact power feeder is substantially equivalent to an ideal transformer. If it is driven by a voltage type converter, the output voltage (=load voltage) becomes substantially constant voltage regardless of the load. In case of a resistive load (ZL=R), the power factor of the power supply output always remains 1 even if the load may vary.
Abstract:
A burden placed on an administrator in creating a volume is reduced. An evaluation hint value and a performance hint value are employed as hint values for each hint. The evaluation hint value is determined by the administrator considering a service usage and the like of the service server 1 to which the volume is allocated. The performance hint value is used to determine a performance and a setting of the volume to be created in the storage system 3. The management server 2 has a conversion table indicating a correspondence between the evaluation hint value defined considering the hardware configuration and the performance hint value, with respect to each storage system 3. The management server 2 converts the evaluation hint value designated by the administrator to a performance hint value, by use of the conversion table associated with the storage system to which the volume is to be created, and the management server creates the volume in the storage system 3 according to the performance value.
Abstract:
A defect inspection apparatus includes: stages each mounting an inspecting object on which a circuit pattern having a group of parallel lines is formed, and each running perpendicular or parallel to the group of lines; an illumination optical system which illuminating a surface of the inspecting object with a slit beam being slit light so that a longitudinal direction of the slit beam is substantially perpendicular to the running directions of the stages, and which has a first inclined angle formed by the direction of the group of lines and a projection line, of an optical axis of the slit beam, to the inspecting object; a spatial filter that shields or transmits reflected and scattered light of the inspecting object according to a difference in distribution of orientation; and a detection optical system that detects the reflected and scattered light transmitted through the spatial filter by image sensors. Moreover, the illumination optical system illuminates the inspecting object with another slit beam from a direction opposite to an incident direction of the slit beam on a plane.
Abstract:
The present invention provides a high-performance storage access environment to a user who moves around a wide area, while increasing the fault resistance of the system. A plurality of network storages (volumes) is assigned to the user. Then, at the occasion of logging in to a volume by the user, the volume that can be accessed with high performance from a position he made access is located. Addresses at a computer with which user makes access are associated with addresses of the volumes provided by a storage device in advance in an assigned volume management table so as to increase access performance. Then, a management server performs control so that the address of the volume associated with the user access position is returned as a response, at the time of logging in.