摘要:
A power conversion system including a plurality of converter transformers. AC side windings of the converter transformers are connected in series for connecting to an AC power system. The power conversion system further includes a plurality of series connected voltage source type self-commutated converters for converting AC power into DC power or DC power into AC power. Each of the voltage source type self-commutated converters is connected to one of DC side windings of the converter transformers, respectively. The power conversion system further includes a plurality of DC voltage sources. Each of DC output sides of the voltage source type self-commutated converters is connected to one of the DC voltage sources, respectively. The power conversion system further includes a control system for controlling the voltage source type self-commutated converters such that each of DC voltages of the voltage source type self-commutated converters follows to one of DC voltage reference values for the voltage source type self-commutated converters, respectively.
摘要:
The accident detection circuit of the present invention is such that in a voltage-type self-excited power converter composed of anode reactors 13 and 23 connected in series, respectively, to power semiconductor elements 11 and 21 of self turn off type connected in series, there are provided anode reactor voltage direction-detecting circuits 16 and 26 which detect, respectively, that the voltage in the direction generated in the anode reactors 13 and 23 exceeds a predetermined value when the current flowing in the direction of from the anode to the cathode of the each element 11, 21 increases, anode current direction-detecting circuits 17 and 27 which detect, respectively, that the current flows in the direction of from the anode to the cathode of the each element 11, 21, delay circuits 18 and 28 which delay, respectively, the output signal of each arm current direction-detecting circuit by a certain period of time, and AND circuits 19 and 29 which designate the output signal of the each anode reactor voltage direction-detecting circuit 16, 26 and the output signal of the each delay circuit 18, 28, respectively, as the input signal, and the output signal of each AND circuit 19, 29 is designated as the accident detection signal of the converter.
摘要:
A vehicle air conditioning apparatus is provided that can extend the mileage of a vehicle by reducing the power consumed by the operation of a compressor and a heater. When a required quantity of heating Q_req is acquired, the minimum power sharing ratio between quantity of heat release Q_hpof a water-refrigerant heat exchanger 22 and quantity of heat release Q_htrof a water heater 32 is calculated, which allows the power consumption W_total to be minimized, and a compressor 21 and the water heater 32 is operated based on the result of the calculation.
摘要:
It is an object of the present invention to obtain crimped conjugated fibers having excellent crimp properties. The present invention provides a crimped conjugated fiber having a crimpable cross-sectional configuration, wherein a cross section of the fiber includes at least two portions: a portion (a) and a portion (b); the portion (a) includes an olefin polymer (A) and the portion (b) includes an olefin polymer (B); the olefin polymer (A) differs from the olefin polymer (B) in at least any one of Mz/Mw, melting point and MFR; and a specific fatty acid amide is added to the olefin polymer (A) and/or the olefin polymer (B). The present invention also provides a non-woven fabric including said crimped conjugated fiber.
摘要:
This centrifugal blood pump apparatus includes an impeller provided in a blood chamber, a first permanent magnet provided in one surface of the impeller, and a second permanent magnet provided in an inner wall of the blood chamber, for attracting the first permanent magnet. The attractive force between the first permanent magnet and the second permanent magnet on the opening side of a sidewall of the blood chamber is set to be smaller than the attractive force between the first permanent magnet and the second permanent magnet on the opposite side of the opening. As a result, inclination of the impeller with respect to a dividing wall during pump operation can be prevented.
摘要:
A centrifugal blood pump apparatus includes an impeller provided in a blood chamber, a permanent magnet provided in one surface of the impeller, a permanent magnet provided in an inner wall of the blood chamber, a permanent magnet provided in the other surface of the impeller, and a magnetic material and a coil provided in a motor chamber for driving the impeller to rotate via a diaphragm. Grooves for hydrodynamic bearing are formed in the diaphragm facing the impeller, and in the inner wall of the blood chamber, respectively. As a result, the impeller can be smoothly activated to drive by controlling a coil current.
摘要:
A new and distinct cultivar of Petunia plant named ‘Sunsurfsirou’, characterized by its mounding and trailing plant habit; vigorous growth habit; early flowering habit; long flowering period; large white-colored flowers with light yellow green-colored venation; and good garden performance.
摘要:
A vehicle air conditioning apparatus is provided that can extend the mileage of a vehicle by reducing the power consumed by the operation of a compressor and a heater. When a required quantity of heating Q_req is acquired, the minimum power sharing ratio between quantity of heat release Q_hpof a water-refrigerant heat exchanger 22 and quantity of heat release Q_htrof a water heater 32 is calculated, which allows the power consumption W_total to be minimized, and a compressor 21 and the water heater 32 is operated based on the result of the calculation.
摘要:
It is an object of the present invention to provide a stable production process for a melt-blown nonwoven fabric comprising thin fibers and having extremely few thick fibers [number of fusion-bonded fibers] formed by fusion bonding of thermoplastic resin fibers to one another, and an apparatus for the same. The present invention relates to a melt-blown nonwoven fabric comprising polyolefin fibers and having (i) a mean fiber diameter of not more than 2.0 μm, (ii) a fiber diameter distribution CV value of not more than 60%, and (iii) 15 or less fusion-bonded fibers based on 100 fibers; a production process for a melt-blown nonwoven fabric characterized by feeding cooling air of not higher than 30° C. from both side surfaces of outlets of slits 31 from which high-temperature high-velocity air is gushed out and thereby cooling the spun molten resin; and a production apparatus for the same.
摘要:
The present invention provides a steering apparatus having simple construction, and good left and right balance of the clamping force, such that the clamping force does not fluctuate depending on the forward-backward position of the steering wheel 103. When fastening the tilt and telescopic function, by rotating an operation lever 349, the peak of a movable cam 344 runs over the peak of a stationary cam 343, which pushes the stationary cam 343 to the right side, and pulls a clamping rod 34 to the left side at the same time, so as to clamp side plates 32A, 32B. The inside surfaces 321A, 321B of the side plates 32A, 32B clamp flat surface section 61A, 62B of a distance bracket 6. The flat surface sections 62A, 62B elastically deform toward the inside in the width direction of the vehicle, and a pair of left and right clamping sections 66A, 66B of bent sections 64A, 64B clamp the outer circumferential surface of an inner column 2 from both the left and right sides.