Abstract:
PROBLEM TO BE SOLVED: To provide a simple and highly reliable display unit (1) for a predicted failure in fluid circulation piping, and also to provide a fluid cooler.SOLUTION: A display unit (1) for a predicted failure of the present invention includes first sacrifice members (11) which are in direct contact with a fluid (40) in piping and weaker than the piping. The display unit (1) also includes a chamber (18) at least partially separated from the fluid circulation (40) by the first sacrifice members (11). The display unit (1) further includes electric reaction members (15, 16) which are arranged inside the chamber (18) so as to cause an electric reaction when exposed to the fluid (40) flowing into the chamber (18) through the sacrifice members (11) with the failure. Thus, the display unit (1) causes the electric reaction as the unit for directly displaying the failure of the sacrifice members (11) and predictively displaying the failure of the piping.
Abstract:
PURPOSE: An arrangement and a method for cooling an electrical machine are provided to efficiently cool down an electric machine by transmitting refrigerant between to a sheet pack. CONSTITUTION: An electric machine(1) comprises an outer rotor(2) revolving around a rotary shaft. A cylindrical stator(5), including a sheet pack(4) in the end part of an air gap(3), is arranged inside a rotor. The sheet pack is alternately arranged in shaft direction of the electric machine. A spiral spacer is arranged between the sheet pack to separate the sheet pack. The stator is cooled down by a spiral duct.
Abstract:
PROBLEM TO BE SOLVED: To provide a speed indicator which does not have a tendency to be affected by severe weather conditions. SOLUTION: This mooring winch includes a winding drum 101, an AC motor 103 for driving the winding drum, a frequency converting unit 104 connected to the AC motor, and a control unit 105 for controlling the frequency converting unit according to an index on the tension of a mooring rope. The control unit calculates a magnetic flux spatial vector for modeling the stator magnetic flux of the AC motor, and calculates an estimated torque value according to the magnetic flux spatial vector and the spatial vector of a stator current. The estimated torque value is used as the index on the tension of the mooring rope. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method and apparatus for limiting the electric power required by at least two electrical loads having a predetermined priority level respectively. SOLUTION: The apparatus for limiting the electric power required by an electrical load includes means (31, 32, 33) of monitoring the total electric power required by at least two electrical loads (21, 22, 23) and means (31, 32, 33) of reducing the individual electric power required by the electrical loads (21, 22, 23) having a predetermined priority level according to a priority level method while making an advance of one priority level per time until the total electric power to be monitored ceases to exceed a predetermined threshold toward the highest priority level, starting with the electrical load having the lowest priority level. COPYRIGHT: (C)2010,JPO&INPIT