Abstract: There is provided a controller which sets electrodes which are respectively disposed on wall surfaces of a plurality of ink chambers which are arranged in parallel so as to be separated from each other by partitions made of a piezoelectric material, to a high impedance state. In addition, at a timing when an identical potential is applied to the electrodes of at least three ink chambers which are arranged in parallel so as to be separated from each other by mutually adjacent partitions, the controller sets electrodes of ink chambers other than ink chambers located on both sides to a high impedance state.

Abstract: A drive device includes a circuit for selecting an arbitrary voltage among a plurality of kinds of voltages required for generating a drive signal for variably controlling potential applied to electrodes of channels. In the drive device, respective drive voltage input terminals and output terminals are respectively connected by a low-impedance connecting circuit which has low internal resistance, and a selected voltage input terminal and the output terminals are connected by a high-impedance connecting circuit which has high internal resistance. The drive device controls a drive waveform transition pattern of a drive signal such that the drive signal is output via the high-impedance connecting circuit while the potential applied to the respective electrode simultaneously changes in the same direction out of a positive direction and a negative direction and that the drive signal is output via the low-impedance connecting circuit in the other cases.

Abstract: In a permanent magnet rotating electrical machine including a stator, a rotor obtained by stacking a plurality of rotor cores arranged with magnet insertion holes in layers with gaps, and permanent magnets inserted to the magnet insertion holes, the magnet insertion holes are formed on both sides of the duct piece so as to depart from the duct piece disposed between the rotor cores as the magnet insertion holes extend from the side of the center of the rotor core to the outer circumference side, the magnet insertion holes are disposed so as to shift from the duct piece in the circumferential direction of the rotor, and inner circumference side voids having the length in the circumferential direction wider than the thickness in the circumferential direction of the permanent magnets are provided from the inner circumference side ends of the permanent magnets toward the duct piece.

Abstract: A drive device includes a circuit for selecting an arbitrary voltage among a plurality of kinds of voltages required for generating a drive signal for variably controlling potential applied to electrodes of channels. In the drive device, respective drive voltage input terminals and output terminals are respectively connected by a low-impedance connecting circuit which has low internal resistance, and a selected voltage input terminal and the output terminals are connected by a high-impedance connecting circuit which has high internal resistance. The drive device controls a drive waveform transition pattern of a drive signal such that the drive signal is output via the high-impedance connecting circuit while the potential applied to the respective electrode simultaneously changes in the same direction out of a positive direction and a negative direction and that the drive signal is output via the low-impedance connecting circuit in the other cases.

Abstract: According to one embodiment, a driving device applies an ejection pulse signal that deforms a partition in such a way that an ink drop is ejected from a nozzle and an auxiliary pulse signal that deforms the partition to such an extent that an ink drop is not ejected from the nozzle, as a drive signal for providing a potential difference between electrodes, to an inkjet head at different timings so that the two pulse signals are not applied simultaneously. A constraint on output of the auxiliary pulse signal is significantly relaxed.

Abstract: A pulse generator forms, from setting data respectively stored in an ejection relevant waveform setting register and a first high impedance setting register, an ejection relevant driving pulse for setting an electrode of an ink chamber communicating with an ejection relevant nozzle to a high impedance state for a predetermined period. The pulse generator forms, from setting data respectively stored in an ejection both-side waveform setting register and a second high impedance setting register, an ejection both-side driving pulse for setting electrodes of ink chambers communicating with ejection both-side nozzles to the high impedance state for the predetermined period. The pulse generator outputs signals of the formed driving pulses to an inkjet head.

Abstract: A electrical machine and a wind power generating system include a stator having a stator winding, a rotor arranged on a side of an inner diameter of the stator with a clearance between the rotor and the stator, a shaft fixed to the rotor and rotated along with the rotor, and a heat pipe arranged from an inner portion over to an outer portion of the shaft, and a radius of gyration of a portion of the heat pipe arranged at the outer portion of the shaft is smaller than that of a portion arranged at the inner portion of the shaft.

Abstract: According to one embodiment, an inkjet head driving device includes a load-voltage generating circuit and a plurality of channel driving circuits provided to respectively correspond to a plurality of channels of an inkjet head. The load-voltage generating circuit selects any one voltage out of a reference voltage and a driving voltage having potential other than the reference voltage and outputs the voltage. Each of the channel driving circuits includes a first input terminal, a second input terminal, a third input terminal, an output terminal, a series circuit, and a parallel circuit.

Abstract: According to one embodiment, a driving device applies an ejection pulse signal that deforms a partition in such a way that an ink drop is ejected from a nozzle and an auxiliary pulse signal that deforms the partition to such an extent that an ink drop is not ejected from the nozzle, as a drive signal for providing a potential difference between electrodes, to an inkjet head at different timings so that the two pulse signals are not applied simultaneously. A constraint on output of the auxiliary pulse signal is significantly relaxed.

Abstract: A pulse generator forms, from setting data respectively stored in an ejection relevant waveform setting register and a first high impedance setting register, an ejection relevant driving pulse for setting an electrode of an ink chamber communicating with an ejection relevant nozzle to a high impedance state for a predetermined period. The pulse generator forms, from setting data respectively stored in an ejection both-side waveform setting register and a second high impedance setting register, an ejection both-side driving pulse for setting electrodes of ink chambers communicating with ejection both-side nozzles to the high impedance state for the predetermined period. The pulse generator outputs signals of the formed driving pulses to an inkjet head.

Abstract: There is provided a controller which sets electrodes which are respectively disposed on wall surfaces of a plurality of ink chambers which are arranged in parallel so as to be separated from each other by partitions made of a piezoelectric material, to a high impedance state. In addition, at a timing when an identical potential is applied to the electrodes of at least three ink chambers which are arranged in parallel so as to be separated from each other by mutually adjacent partitions, the controller sets electrodes of ink chambers other than ink chambers located on both sides to a high impedance state.

Abstract: A rotary electric machine according to the present invention includes a stator including a stator core and stator coils, a rotor provided rotatably with a gap to the stator, a housing that stores the stator and the rotor, a fan that circulates air inside the housing through the gap in the housing, a heat exchanger that cools the air circulated by the fan, and an air guiding plate including an air guiding route formed therein for guiding the air cooled by the heat exchanger such that the cooled air flows into the gap without coming into contact with the stator coils.

Abstract: A driving device of an ink jet head including a plurality of ejection channels, includes a plurality of driving waveform generation portions that are provided so as to respectively correspond to the plurality of ejection channels, a random number generation portion that generates a random number, and a connection portion. The respective driving waveform generation portions receive printing data and correction data, generate a driving signal of the ejection channels on the basis of the received printing data, correct a waveform of the driving signal by using the received correction data, and then output the corrected waveform to the corresponding ejection channels.

Abstract: A rotor slot is asymmetrically shaped with respect to a straight line drawn from the central axis of the rotation of the rotor in a radial direction, and has a slot opening, the circumferential width of which is smaller than that of the rotor slot, at the top of the rotor slot, so that a loss generated in the rotor due to a carrier harmonic component can be reduced and the power factor can be improved, enabling a current generated in an armature winding to be suppressed and thereby improving efficiency in a rated operation.

Abstract: The permanent magnet rotating electric machine comprising a stator with a stator coil wound on a stator iron core, a rotor with a plurality of permanent magnets disposed in the circumferential direction in a rotor iron core, which is disposed opposite to the stator iron core of the stator with a predetermined spacing therebetween and is fixed to a shaft, a water-cooling unit disposed around the outer circumference of the stator iron core, and a fan fixed to the shaft on the same side as at least one axial end of the rotor iron core to circulate cooling air in the permanent magnet rotating electric machine; further comprising ventilation paths, through which the cooling air flows, formed around the outer circumference of the water-cooling unit; wherein after the cooling air has been circulated by the fan in the machine for cooling, the cooling air is led to the ventilation paths to perform heat exchange between the cooling air flowing in the ventilation paths and the water-cooling unit, after which the cool

Abstract: An induction motor includes: a stator and a rotor arranged so as to face the stator via a void, the rotor including conductor bars in a plurality of slots formed by a plurality of teeth arranged so as to extend in the circumferential direction of a rotatably held rotor core, wherein the circumferential width of distal end portions of the slots on the radially outside of the rotor core are narrowed by distal end portion of the teeth on the radially outside of the rotor core, and the teeth are each formed with a projection protruding in an arcuate shape from the distal end of the tooth on the radially outside of the rotor core toward the conductor bar in each of the slots.

Abstract: According to one embodiment, a direct current voltage which has positive and negative potentials relative to a ground potential interposed therebetween is used as a drive voltage for electric charging/discharging to/from an actuator.

Abstract: An electrical rotating machine includes: a rotating shaft; a rotor, equipped with permanent magnets, and formed to rotate with the rotating shaft, a stator disposed in opposition on an outside-diametral side and via a clearance with respect to the rotor; and anti-demagnetization conductors extending in the axial direction of the shaft, the conductors each being disposed inside the rotor, wherein: the anti-demagnetization conductors are provided in pairs of two for each of magnetic poles of the rotor; the two anti-demagnetization conductors forming a pair are electrically interconnected; and, inside the rotor, the two paired anti-demagnetization conductors are disposed at different-polarity sides of two corresponding permanent magnets in a circumferential direction of the rotor, the different-polarity sides each being more adjacent to the circumferential direction of the rotor than to an end portion of one of the two corresponding permanent magnets existing close to each other in one magnetic pole.

Abstract: A permanent magnet type rotary electric machine has a rotor having a rotor core and permanent magnets buried into the rotor core by being incorporated into respective permanent magnet slots. The permanent magnet slot per one pole is divided at least into four slots along an outer circumferential direction in the rotor core, and in respective rest core-portions between adjacent divided permanent magnet slots in the rotor core, a width of a first rest core-portion at the middle of each pole and a width of a second rest core-portion between adjacent poles of different polarities are formed larger than that of the others.

Abstract: According to one embodiment, a heat control device of an inkjet head includes an inkjet head unit in which plural inkjet heads each including plural nozzles are arranged side by side, and a control part that performs multiphase-division driving of the nozzles and controls discharge of ink from the respective nozzles. The control part ON/OFF controls a precursor minute vibration for each line information set according to discharge pattern information irrespective of data information including the discharge pattern information to cause the respective nozzles corresponding to respective pixel data constituting a drawn image to discharge ink according to the pixel data.