Abstract: A floor working machine includes a body frame (1), an electric drive unit (29), a pad unit including a first pad (21) and a second pad (21) having polishing surfaces (21a) for contacting a floor surface, the first pad and second pad being opposed to each other, and a pad control mechanism (50) for controlling the pad unit by using drive of the electric drive unit. The pad control mechanism (50) controls the first pad (21) and second pad (21) such that the first pad and second pad reciprocate, with the respective polishing surfaces (21a) contacting the floor surface, in a first direction (A) in which the first pad and second pad approach each other and in a second direction (B) in which the first pad and second pad move away from each other. A guiding device (23, 25) guides the first pad and second pad in reciprocating movement such that the first direction and second direction are linear and parallel to the floor surface.

Abstract: A method whereby a plurality of inverters for converting DC power outputted from a DC power supply, such as solar cells or fuel cells, to AC power are operated efficiently without being biased to particular inverters. The number of inverters to be run is determined in correspondence with at least one output value of the DC output or AC output, and the determined number of inverters are selected and made to run from among the plurality of inverters on the basis of a predetermined rule. In addition, a parallel-connected system is disclosed for enabling efficient and appropriate parallel-in operation by the use of inverters, with one of the inverters controlling the remaining inverters and effecting system interconnection protection.

Abstract: There is provided a calibration method of a detecting section which is provided on a substrate incorporated into a system interconnection generator and which detects by detecting means an object to be detected or an value of the object to be detected. The calibration method comprises the steps of prior to the substrate being incorporated into the system interconnection generator, measuring by the detecting section a reference value of the object to be detected by the detecting section; storing at least one of an error with respect to the reference value measured by the measuring step and the measured value of the reference value in association with the measurement result; and after the substrate being incorporated into the system interconnection generator, outputting the measurement result of the detecting section based on at least one of the error and the measured reference value, stored by the storing step in association with the measurement result.

Abstract: After starting the input of a switching signal to a booster circuit whose boosting rate is changeable in accordance with the duty ratio of the inputted switching signal and calculating the output power of an inverter circuit, which is connected to the subsequent stage of the booster circuit, from the output current of the inverter circuit, the target voltage after boosting by the booster circuit is obtained based on the output power. If the actual output voltage of the booster circuit is lower than the target voltage, the duty ratio of the above switching signal is increased, and if higher, the duty ratio of the above switching signal is decreased.

Abstract: In order to obtain a solar power generating device capable of effectively using power generated by a solar cell, the virtual optimum operating voltage, the MPPT minimum voltage, the MPPT maximum voltage, and the low and high voltage change width switching voltages used when MPPT control is carried out are calculated on the basis of the output voltage of a solar panel immediately before the startup of the inverter circuit in the solar power generating device and the MPPT control is carried out on the basis of each of the calculated voltage values.

Abstract: A magnet is provided on the inner circumferential surface of a hub rotatable about a central axis C of the motor, and a stator is arranged inside the inner circumferential surface of the hub to oppose the magnet. The stator core of the stator is formed by stacking substantially annular, plate-shaped core forming members, and has an annular portion arranged to be coaxial with the central axis, a plurality of winding portions projecting from the annular portion radially, and pole portions formed on the extending ends of the respective winding portions and opposing the magnet. Each winding portion is squeezed in the stacking direction by plastic formation such that its thickness is smaller than those of the annular portion and pole portion. A coil is wound on each squeezed winding portion.

Abstract: A CPU instructs a VCM driver, a spindle motor driver and a servo data reading or writing circuit, to writing servo data for error detection at any of default rotation frequencies stored in a memory. A positioning error signal analyzer detects a positioning error from the written servo data for error detection, and CPU determines an optimal disk rotation frequency from this positioning error.

Abstract: A magnet is provided on the inner circumferential surface of a hub rotatable about a central axis C of the motor, and a stator is arranged inside the inner circumferential surface of the hub to oppose the magnet. The stator core of the stator is formed by stacking substantially annular, plate-shaped core forming members, and has an annular portion arranged to be coaxial with the central axis, a plurality of winding portions projecting from the annular portion radially, and pole portions formed on the extending ends of the respective winding portions and opposing the magnet. Each winding portion is squeezed in the stacking direction by plastic formation such that its thickness is smaller than those of the annular portion and pole portion. A coil is wound on each squeezed winding portion.

Abstract: A disk apparatus comprises a carriage rotatably arranged in the case, and a magnetic head supported on the carriage. A voice coil motor for rotating the carriage includes a yoke fixed to the case, a magnet fixed to the yoke, and a coil mounted on the carriage and facing the magnet. A carriage locking mechanism for locking the carriage in a stop position includes a locking magnet and a magnetic member fixed directly to the yoke and the carriage, respectively. The magnetic member is attracted by the magnetic force of the locking magnet to lock the carriage in the stop position, when the carriage is rotated to the stop position. An elastic member is fitted on the locking magnet so as to abut against the magnetic member to relieve the shock and to define a predetermined gap between the magnetic member and the locking magnet when the carriage is rotated to the stop position.

Abstract: A magnet is provided on the inner circumferential surface of a hub rotatable about a central axis C of the motor, and a stator is arranged inside the inner circumferential surface of the hub to oppose the magnet. The stator core of the stator is formed by stacking substantially annular, plate-shaped core forming members, and has an annular portion arranged to be coaxial with the central axis, a plurality of winding portions projecting from the annular portion radially, and pole portions formed on the extending ends of the respective winding portions and opposing the magnet. Each winding portion is squeezed in the stacking direction by plastic formation such that its thickness is smaller than those of the annular portion and pole portion. A coil is wound on each squeezed winding portion.

Abstract: There is provided a magnetic disk apparatus wherein a hub is rotatably mounted on a hub holder of a bracket via bearings. A stator core and a motor coil are mounted on the outer side of the hub holder, and a yoke and magnet are mounted on the hub, thereby constituting a spindle motor. A magnetic disk is placed on a flange provided at one end portion of the hub. The disk is fixed between the flange and a disk clamper with a spacer interposed between the clamper and the disk. The bracket is formed of aluminum or a plastic material. A reinforcement plate made of an ion-based material or a ceramic material on a bottom surface of the bracket. Since the reinforcement plate is attached to the bracket, the rigidity of the bracket and the rigidity of the motor disk assembly can be increased without increasing the thickness of the bracket.

Abstract: A floor coating agent applying machine having propelling wheels attached to a machine body and an applying device for applying floor coating agent onto a floor surface by an applying member. The applying device is vertically movably mounted on the machine body between a free-lift state where the device is lowered, by a dead weight thereof, relative to the machine body to place the applying member into pressure contact with the floor surface and a lift-up state where the applying member is lifted up away from the floor surface. A control member is provided for selectably bringing the applying device into the free-lift state or the lift-up state.

Abstract: A floor coating liquid applying machine having a propelling machine body, a liquid feed device driven to reciprocate along a transverse direction of the machine body and a liquid feed pump. The feed pump includes an elastic pump tube connecting between a liquid tank and the liquid feed device, a rotary pump member operatively connected with the elastic pump tube, a feed portion disposed along a rotational direction of the rotary pump member, with the feed portion being operable in response to rotation of the rotary pump member for causing the elastic pump tube to elastically deform to squeeze out the liquid therein into the liquid feed device and a receiver portion disposed aside the feed portion for causing the elastically deformed pump tube to resile so as to introduce further liquid from the tank into the elastic pump tube.

Abstract: The present invention resides in an arrangement structure of an electric portion, a mechanical portion, a base and a cover. A concave portion corresponding to the mechanical portion is formed in the base. On the upper side of the base the mechanical portion is arranged and is covered with a cover. On the under side of the base the electrical parts are arranged and the taller electrical parts equipped on the printed wired board and are arranged in the concave portion of the base.

Abstract: A structure for securing the trim cover assembly of a seat back in an automotive seat is disclosed in which the seat back is formed in the back thereof with a slit extending along the internal periphery of the seat back. The end portions of a front-side trim cover assembly for covering the front side of the seat back are inserted through the slit and are fixed to the interior of the seat back. The securing portions of hard material disposed in the peripheral end portions of a back-side trim cover assembly for covering the back side of the seat back are inserted through the slit and thereafter, due to the tension of the back-side trim cover assembly, are engaged with the inner side of the slit.