By calculating the rated stall,overload stall and power loss of a certain screwdrill,the disadvantages resulting from the softness of the rotary speed characteristic and the high starting pressure dtoP are quantitatively analyzed.
With the wall conditioning, impurities and radiation power losses are generally lower than those with boronization, and strong wall pumping and low hydrogen recycling occur in these tokamak discharges.
In this paper LabWindows/CVI is used as platform to develop system software about automatic control of working mechanism of roadheader, automatic shaping of laneway section can be completed automatically if this system is adopted according to section shape and parameters which are input by user, feeding velocity can be adjusted automatically accordingto different distribution of coal and rock in laneway section, aims of reducing loss of power and improving working efficiency and degree of automatization can be achieved.
On the one hand, wear caused by friction is one of the main reasons of failure of machines and equipments. On the other hand, processes of friction result in loss of power and waste of energy. Lubricants play a significant role to reduce friction and wear.
An improved design plan of the exhaust silencer of Changchun-40 tractor is introduced in this paper. It has been proved by contrast testings of the new and the old exhaust silencer that the noise alongside the exhaust mouth of the new one is reduced 9 dB(A), the Environmental noise of the tractor reduces 2 dB(A). The loss of power of the new one is less than 2 percent which is lower than the old one.
In the paper ,the author describes the advantage of-pivoted shoe bearing for large steam turbine, discusses about how it guarantee the reliability for safe operation,axial forces,loss of power in bearing.
On the basis of synthetical consideration of the leakage flow rate, the loss of power and the ability to resist contaminant of the distribution pair,the parameters used to describe the distribution state are optimized.
This can eliminate the bulky and weighty transformers and reduce power loss.
A deviation of the Faraday rotation angle from 45° leads only to an additional power loss.
Firstly, the closed-form expressions of the average carrier-to-interference power ratio (CIR) and the statistical average ICI power, both of which reflect the desired power loss, are presented.
First problem is solved in multi-objective framework in which the best weights assigned to objectives are determined while employing weighting method and in second problem, active power loss of the system is minimized subject to system constraints.
Consequently, the high voltage and high current spikes caused by parasitic inductors or capacitors oscillation do not occur in this circuit, and the high power loss caused by high frequency switching can be greatly reduced.