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Consider a 3-hp, 220-V, 1800-r/min separately excited dcmotor controlled by a single-phase fully controlled rectifierwith an ac source voltage of 230Vat 60Hz.Assume that the full-load efficiency of the motor is 88%, and enough filter inductance is added to ensure continuous conduction for any torque greater than 25% of rated torque. The armature circuit resistance is 1.5 .
(a) Determine the value of the firing angle to obtain rated torque at 1200 r/min.
(b) Compute the firing angle for the rated braking torque at -1800 r/min.
(c) With an armature circuit inductance of 30 mH, calculate the motor torque for α = 60° and 500 r/min, assuming that the motor operates in the continuous conduction mode.
(d) Find the firing angle corresponding to a torque of 35 N·m and a speed of 480 r/min, assuming continuous conduction.
CRM Framework There exist several ways to view CRM framework. Therefore, an operational strategic framework is more relevant to apply CRM in power/electricity business systems
Q. A shunt generator gives full load output of 30 kW at a terminal voltage of 200V. The armature and field resistance are 0.05? and 50? resp.. The iron and friction losses are 10
Explain the discovery of neutron. Mention its properties. Discovery of Neutron: The existence of neutron was first predicted by Rutherford in the year 1920. But it was discov
Transparent latch D flip Flop A typical example of this type of D flop is 7475 shown in figure when CLK connected is enable signal is high and the flip flop is enabled
a) Sketch the variation of electron concentration with temperature for i) an n-type semiconductor doped with 1021 donors m-3 ii) an intrinsic semiconductor. b) Expla
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a) Write down a short note on compensators. b) Classify filter with relevant sketches. c) Illustrate the principle and working of Analog to Digital converter.
Write an m-file "distan.m" which does all the following operations: (i) computes 10 dimensional histogram of an input image h1=sum(hist(imn,10)'); (ii) computes
design a half wave bridge rectifier to perform the function indicated
Demodulators for FM Figure shows a block diagram of a general FM demodulator, which is implemented by generating an AM signal whose amplitude is proportional to the instantane
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