Canon Kabushiki Kaisha

Masaki Suzui

Nobuyoshi Takehara

Naoki Manabe

Seiji Kurokami

Fumitaka Toyomura

Provided is controlling apparatus for an electric motor which is driven in accordance with a driving signal input through electric contacts held in slide contact with each other, the controlling apparatus including: a superimposed signal generating unit, which generates a superimposed signal having a peak voltage higher than a voltage of the driving signal; and a controlling unit, which generates the driving signal based on a controlling signal input so as to control the driving of the electric motor, and superimposes the superimposed signal onto the driving signal and output the resultant signal to the electric motor, the controlling unit superimposing the superimposed signal onto the driving signal and outputting the resultant signal to the electric motor when a state in which the driving signal is lower than a predetermined voltage continues for a time period which is longer than a predetermined time period.

Controlling apparatus and lens apparatus including same

A drive control apparatus includes a movable member; a driver configured to drive the movable member; a transmission device configured to transmit a driving force of the driver to the movable member; a first detector provided on the movable member side of the transmission device configured to detect a driving state of the movable member; a second detector provided on the driver side of the transmission device configured to detect a driving state of the driver; and a controller configured to control driving of the driver. The controller is configured to select, as information to be fed back, first drive information obtained from the first detector, or second drive information obtained from the second detector, based on the first drive information and the second drive information; and control the driving of the driver based on the selected one of the first drive information and the second drive information.

Drive control apparatus, and lens apparatus and image pickup system including the drive control apparatus

Provided is a three-dimensional image pickup system including: a pair of lens apparatus; a camera apparatus for picking up subject images formed by the pair of lens apparatus; a convergence angle changing unit for changing a convergence angle of the pair of lens apparatus; a controller for controlling the convergence angle of the pair of lens apparatus in association with an operation of focus lens units of the pair of lens apparatus; and an interlock switching unit for switching between an interlocked state in which the convergence angle is interlocked with the operation of the focus lens units and a non-interlocked state in which the convergence angle is not interlocked with the operation of the focus lens units.

Three-dimensional image pickup system

The information supplying apparatus () is configured to supply first information to an image processing apparatus performing image processing for reducing an image component which is included in an image obtained by image pickup through an optical system and is generated due to aberration of the optical system. The first information is used in the image processing. The information supplying apparatus includes an information acquiring part () configured to acquire second information showing a state of at least one of an optical adjusting element () included in the optical system and an operation part operated for actuating the optical adjusting element, and an information generating part () configured to generate, based on the second information, the first information used in the image processing performed at a point in time after acquisition of the second information.

Information supplying apparatus, lens apparatus, camera apparatus and image pickup system

A lens apparatus includes an optical lens unit including a movable lens portion, a drive unit configured to drive the movable lens portion, a control unit configured to control the drive unit, a difference calculation unit configured to calculate a difference between command signals received at intervals of a predetermined period, and an addition unit configured to add the difference calculated by the difference calculation unit to each of the command signals, wherein the control unit controls the drive unit based on a result of an addition performed by the addition unit.

Lens apparatus and lens system

To form a center tap (CT), at least two coils must be formed. This increases the number of steps in the winding process and decreases the workability. To prevent this, a conductor having a plurality of plate portions that are connected to each other at one vertex of a rectangular shape is formed. The conductor is wound on a winding shaft, thus forming two coils.

Electrical device and method of producing the same

In a push-pull switching circuit for a low-voltage, large current application, a decrease in resistance of a transformer and of its peripheral circuit is sought for. In view of this, a coil () is fixed at its terminal (T) side, and is wound around a columnar winding core () counterclockwise in the order of a lower surface (H), side surface (I), upper surface (J), side surface (K), and the lower surface (H). A coil () is fixed at its terminal (T) side, and is wound clockwise in the order of the upper surface (J), side surface (I), lower surface (H), side surface (K), and upper surface (J).

Electric component and method of producing the same

In an inductor having a core and first and second coils wound upon the core, the wire of the first coil and the wire of the second coil lie are wound so as to lie parallel to each other and contact the core. The winding starting position of the first coil is made to coincide with the winding starting position of the second coil along the axial direction of the core and is offset from the winding starting position of the second coil along the winding direction of the core. As a result, the area factor of the coils in the winding area of the inductor can be improved and the size of the inductor reduced.

Inductor and transformer

An adhering process of adhering a winding, after the winding is wound on the bobbin, to a bobbin entirely or partly with an adhesive tape, for the purpose of reliably fixing the winding to the bobbin, increases the manufacturing cost of a transformer. To solve this problem, a primary winding () is wound on a winding core (). Extracting portions of the primary winding () are caused to intersect, and their terminal ends are connected to terminals () which oppose each other through the winding core () and which are arranged within a region having end portions of a winding space of the winding core () as boundaries.

Electrical device, transformer, and inductor, and method of manufacturing electrical device

In a power conversion system having a DC power supply which has an almost fixed DC voltage to ground and a predetermined stray capacitance to ground and outputs a DC power, and a power converter which converts the DC power output from the DC power supply into an AC power by switching, the phase of an AC voltage to ground generated in the DC power supply by switching is detected, the phase of an AC ground fault current that flows through the stray capacitance to ground and the ground fault resistance of the DC power supply is detected, and the difference between the two detected phases is compared with a predetermined threshold value, thereby determining a DC ground fault in the DC power supply. With this arrangement, the ground fault state of the DC power supply can more accurately be detected. In addition, the operation efficiency of the power conversion system can be increased.

Apparatus and method of detecting ground fault in power conversion system

Along with the expansion of the application range of solar power generation systems, connection to a single-phase 100-V system is required. To most easily meet this requirement, a non-insulated inverter with a single-phase two-wire 100-V output is used. It is preferable to use an inverter with a single-phase two-wire 200-V output, i.e., a most popular commercially available inverter. For this purpose, a power supplied from a solar battery is converted into a single-phase three-wire 200-V AC power form by the inverter. The output from the inverter with non-insulated inputs and outputs is supplied to a system through a transformer arranged to connect the line of the single-phase three-wire 200-V AC power to a single-phase two-wire 100-V system with one line grounded. To make a ground fault sensor incorporated in the inverter function, the median potential line of the single-phase three-wire 200-V AC power is connected to the ground line of the system.

System interconnection apparatus and connection method thereof

When islanding operation is to be detected in a power conversion apparatus for converting a DC power into an AC power and outputting the AC power to a system power supply, a plurality of variation generation systems for executing, in accordance with different schemes, detection of islanding operation in which power supply from the system power supply is stopped are arranged, and at least one variation generation systems is selected by selection system from the plurality of variation generation systems and operated.

Power conversion apparatus, power conversion system, and islanding operation detection method

In a solar power generation system having an inverter, if a smoothing capacitor in the inverter degrades, the operation of the inverter is interrupted, and a loss in the amount of power generation occurs inevitably. To prevent this loss, a degradation determination section ( ) and output suppressing section ( ) are provided in an inverter ( ). If the degradation determination section ( ) determines a degradation in capacitor ( ), the operation of the inverter ( ) is continued while suppressing the output current of the inverter ( ) by the output suppressing section ( ). In addition, a warning section ( ) warns the user about the degradation in capacitor ( ). With this arrangement, a solar power generation system capable of detecting a degradation in smoothing capacitor in the inverter ( ) and appropriately operating the inverter ( ) can be provided.

Power converting apparatus, control method therefor, and power generation system

In a solar power generation apparatus, when power necessary for a control circuit and the like is supplied from the load side of an inverter, a period from when the input voltage becomes lower than a threshold voltage at which the inverter should be stopped to when the inverter is stopped after the elapse of a predetermined time includes a period when power consumed by the inverter become larger than power output from the inverter, i.e., power is wasted. To solve this problem, input power is integrated for a predetermined time to calculate integrated electric energy. The calculated integrated electric energy W is compared with a threshold value Y If W <Y a gate block signal is output to stop the operation of the inverter. As the threshold value Y a value corresponding to the product of the non-load power of the inverter and the predetermined time T is set.

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Kyoto, Japan

Masaki Suzui