Topic
Rotational speed
About: Rotational speed is a research topic. Over the lifetime, 23327 publications have been published within this topic receiving 151696 citations. The topic is also known as: speed of revolution & revolution rate.
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Patent•
26 Aug 1996
TL;DR: In this article, a centrifugal blood pump driver comprises a motor housing and the housing contains a motor for rotationally driving the motor and a controller associated with the motor for controlling the rotational speed of the motor.
Abstract: A centrifugal blood pump driver comprises a motor housing and the housing contains a motor for rotationally driving the centrifugal blood pump and a controller operatively associated with the motor for controlling the rotational speed of the motor; a speed selector for generating a selected speed signal signifying a selected rotational speed for the motor; sensors operatively associated with the motor or controller for sensing the rotational speed of the motor and outputting a monitor signal signifying such rotational speed; program memory for storage of a program of microprocessor readable instructions; a microprocessor under program control, in electrical connection with the controller, the speed selector, the sensor and the program memory, for receiving the selected speed signal and generating a speed control signal to the controller signifying the selected speed for the controller, and for receiving the monitor signal and outputting a display signal; a display in electrical communication with the microprocessor and responsive to the display signal for displaying information; motor housing circuitry for providing electrical communication among the controller, the speed selector, the sensor, the program memory, the microprocessor, and the display; and electrically conductive cable connected to the motor housing circuitry for transmitting electrical DC power to the motor housing circuitry from an external power source.
51 citations
TL;DR: A rotating cylindrical RO membrane is theoretically investigated as a novel method to reduce polarization and fouling and a dynamic model based on RO membrane transport incorporating concentration polarization is used to predict the performance of rotating RO system.
51 citations
TL;DR: In this article, the effect of friction stir welding (FSW) parameters such as tool material rotational speed, and welding speed on the mechanical properties of magnesium alloy AZ31B was studied.
51 citations
TL;DR: In this article, the local microstructure evolution, mechanical properties and corrosion behavior of the dissimilar friction stir welded AA2024/7075 joints were evaluated as a function of rotational speed.
51 citations
Patent•
01 Oct 1990TL;DR: In this paper, a control system for a turbocharger which incorporates a rotary electric machine that is operable as a motor or a generator is described. But the rotational speed of the turbochargers is not controlled.
Abstract: A control system controls a turbocharger which incorporates a rotary electric machine that is operable as a motor or a generator. When the rotary electric machine operates as a motor with supplied electric power, the control system controls the amount by which the electric power is to be reduced or increased, depending on the rate of change of the rotational speed of the turbocharger within a speed control range for the turbocharger, thereby reducing the degree by which the rotational speed of the turbocharger varies.
51 citations