Speed basic parameters controlling

In the above schemes the two quantities (/ and / ,) are not separated. Initially it w as not easy to separate them and the whole phasor ( was varied to achieve a speed variation. Yet close speed control was possible but the motor s basic parameters were essential to achieve more accurate speed control. Since it may not be practical to obtain all the parameters of each motor promptly, the drive software is designed so that the name plate particulars ofa motor (V, N, and kW) alone arc enough to determine the machine s required parameters through the motor s... 

With different approaches to monitor and control the basic parameters of the motor, i.c. 4, /, and sin 6, many tnorc alternatives arc possible to achieve the required speed variation in an a.c. machine. Control of these parameters by the use of an encoder can provide an accuracy in speed control as good as a d.c. machine and even better. 

What strange shapes can you create by hand or by using the C or BASIC spider programs in Appendix 1 Both programs compute the endpoint positions x, y) and (X2, )>2) of each straight web chord on a circle. To control the programs, you can alter the values for variables a and b, which allows you to create an amazing array of spider forms. These two parameters control the speed with which one end of the... 

The best anti-surge control is the simplest and most basic that will do the job. The most obvious parameter is minimum-flow measurement, or if there is a relatively steep pressure-flow characteristic, the differentia pressure may be used. The latter parameter allows for a much faster response system, as flow measurement response is generally slow however, the speed of response need only be fast enough to accept expected transients. One major problem with the conventional methods of measurement and control is the need to move the set point for initiation of the control signal away from the exact surge point to allow some safety factor for control response time and other parameters not directly included... 

In examining the possibilities and basic trends in the use of the capacity of polymers for structural transformations under the effect of external fields, it is possible to hypothesize that these systems cannot compete with low-molecular-weight liquid crystals where a high speed of response is required. Nevertheless, certain prospects have opened up in the analysis of the elecux)-optical characteristics of mixed composites based on polymeric and low-molecular-weight liquid crystals. When the components of the mixtures are selected appropriately, all of the parameters which control the degree of multiplexing of such devices, i.e., Ky, 33/ 11 Ae/ej, decrease with an increase... 

When discussing efficiencies, the two most important design parameters are the isentropic enthalpy drop across the expander and the volumetric flow rate at the expander outlet. Stress limits the rotor tip speed to a certain extent, but more often the speed is determined by the enthalpy drop. The outlet volumetric flow rate likewise controls the expander wheel flow area. These parameters within mechanical limits determine the basic configuration of the hydraulic channel, which in turn directly affects the turboexpander efficiency. 

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