摘要:
Anon-asbestos friction material is provided with a fibrous base material, a friction modifier, and a binder, wherein a partially graphitized coke is blended in a ratio of 0.5 vol % to 2.5 vol %. By blending the partially graphitized coke, compression strain of the friction material is adjusted so as to improve brake feeling without deteriorating friction properties.
摘要:
An object is to realize acoustic noise reduction under a wide range of rotating speeds and together with PWM control. A signal (VCTL1) is generated as a trapezoidal wave repeatedly rising and falling in each given electrical angle section extending before and after the current-supply pattern is switched in accordance with the electrical angle of a rotor of a motor, and a signal (VCTL2) is generated in the opposite phase. A control circuit (22) appropriately selects among the signals (VCTL1 and VCTL2) and a given signal (SCTL) and inputs them to comparators (59 to 61). The comparators (59 to 61) compare the input signals with a carrier signal (B6) provided as a triangular wave. Switch elements for controlling the current-supply pattern to the motor turn on/off on the basis of output signals (C1 to C6) from the comparators (59 to 61). As a result, the current-supply pattern is switched softly by PWM control in the electrical angle section mentioned above.
摘要:
A plurality of thermal power generation plants 100 are provided with a communication terminal 200 and a function of controlling respectively a boiler control unit 110, a turbine control unit 120 and an auxiliary machine sequence control unit 130 based on an operation signal inputted via the communication terminal 200. A remote control center 10 which is connected to the communication terminal 200 via the Internet 300, accesses the control units and remotely controls operating states including starting and stopping of the concerned thermal power generation plant 100.
摘要:
An operating method of a combined plant that has several gas turbines and exhaust heat recovery boilers which generate steam by exhaust gas from the gas turbines wherein exhaust gas from each of the heat recovery boilers is passed through exhaust gas ducts and discharged from a common chimney. The method includes operating a combined plant having plural axes which may be suitably started or stopped and having means for discharging exhaust gas from three or more gas turbines through one common chimney. When the pressure at a joining part of an exit duct of an exhaust heat recovery boiler is a positive pressure or the atmospheric temperature is higher than a preset atmospheric temperature, gas turbines can be re-started or stopped without back-flow of exhaust gas of the gas turbine.
摘要:
Apparatus for controlling a tone arm in a record playing device of the linear tracking pickup type includes a pair of guide rails; a carriage slidably mounted on the guide rails; a pickup assembly mounted on the carriage and including a support mechanism for supporting the tone arm for horizontal movement with respect to a record disc; a linear drive motor for linearly driving the carriage along the guide rails in the horizontal direction with respect to the record disc; a motor drive circuit for controlling the energization of the linear drive motor; an offset angle detecting device for detecting an offset angle of the tone arm and for generating an offset angle output in response thereto; a first switch circuit for supplying the offset angle output to the motor drive circuit when the tone arm traces the record disc to drive the linear drive motor so as to compensate for the detected offset angle; an inclination detecting circuit for detecting an inclination of the carriage with respect to the record disc and for generating an inclination output in response thereto; and a second switch circuit for supplying the inclination output to the motor drive circuit when the tone arm is lifted from the record disc to prevent undesirable linear movement of the carriage.
摘要:
In a friction material, columnar or scaly non-whisker-like alkali metal titanate or non-whisker-like alkali metal•alkaline-earth metal titanate having an average particle diameter in the range of 0.1 to 100 μm and an aspect ratio of 3 or less and an inorganic porous filler are compounded, and a friction material in which non-whisker-like lithium.potassium titanate having an average particle diameter in the range of 0.1 to 100 μm and an aspect ratio of 3 or less is compounded.
摘要:
A monitoring and control system is provided having a control device, arranged in a central controller room, which provides commands to power distribution panel switch gear located in the field. The switch gear transmits and receives controlling and monitoring signals through wireless communication applying an evanescent mode. The switch gear has a power circuit connected to a plurality of devices to be operated. The switch gear is a panel comprising metal and non-metal surfaces, so that a portion of wireless waves in the evanescent mode travel out of the panel. A receiver is provided for monitoring the wireless waves that travel out of the panel. The wireless signals are compared with information stored in a diagnostics database, and are diagnostically evaluated to determine whether the signals are within a known normal operating range.
摘要:
A plurality of thermal power generation plants 100 are provided with a communication terminal 200 and a function of controlling respectively a boiler control unit 110, a turbine control unit 120 and an auxiliary machine sequence control unit 130 based on an operation signal inputted via the communication terminal 200. A remote control center 10 which is connected to the communication terminal 200 via the Internet 300, accessses the control units and remotely controls operating states including starting and stopping of the concerned thermal power generation plant 100.
摘要:
An image input apparatus is disclosed, which comprises a running roller manually rolled along an image information surface for the scanning thereof, position detecting means for detecting the position of the running roller according to the rotation thereof, a line sensor for reading out image information of the image information surface, a line sensor driving circuit for driving the line sensor according to a control pulse signal having a constant cycle period, and memory means for storing the output of the line sensor. The output of the position detecting means is utilized as address data of a memory to accurately store image information in the memory.
摘要:
A power generation plant remote control and operation system is constituted by a plurality of thermal power generation plants 100 each of which is provided with a communication terminal 200 and a function of controlling respectively a boiler control unit 110, a turbine control unit 120 and an auxiliary machine sequence control unit 130 based on an operation signal inputted via the communication terminal 200 and a remote control center 10 which is connected to the communication terminal 200 via an internet 300, accesses the control units 110, 120 and 130 representing control objects in the respective thermal power generation plants 100 and remotely controls operating states including starting and stopping of the concerned thermal power generation plant 100, further, the thermal power generation plant 100 pays a consideration to the remote control center 10 based on its own operating state controlled by the remote control center 100. Thereby, a system is provided in which the starting and stopping operation of electric power generation plants is performed remotely and automatically depending on the circumstance of machines and apparatuses of the respective plants or the same is performed semiautomatically and properly after being provided with a guidance.