Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Solve using data from the DC machine data sheet, using the "hot" resistance value for all calculations. Note that the value of K on the sheet is for rated (100%) field flux. Assume that the machine can safely handle as much current as the power converter can deliver to it. In addition, assume that all power semiconductors are ideal with zero voltage drop when they are on.
1. Consider a 2 hp, 850 rpm dc machine connected to a single-phase, fully-controlled thyristor bridge as shown in Fig. 2.9-4 (pg. 53), assuming that the series inductance is large enough to justify the assumption of infinite output inductance. The amplitude of the ac voltage source is 210 Vrms, the maximum thyristor current is 10 A and the phase control angle α can be varied over the full range from 0 to π rad. Assume that the maximum machine speed is 2000 rpm in either direction (i.e., ± 209.4 rad/s).
a) Plot the complete boundary envelope (i.e., capability curve) of the drive system's torque-speed operating capabilities on a set of T-ω axes, with torque T on the y-axis [in N-m] and speed ω on the x-axis [in rad/s]. Assume that the field flux is constant at its rated (100%) value. In addition, assume that the maximum armature current is determined by the maximum thyristor current rather than the rated machine current based on its rated power. Similarly, assume that the maximum applied armature voltage amplitude is determined by the maximum positive and negative rectifier output voltage (@α = 0 and α = π) rather than the rated machine voltage. What are the torque, speed, machine shaft power, and phase control angle α at the four corners of the operating envelope?
Q. Explain different Routing plan adopted in a Telephone network. Ans: Hierarchical networks are capable of handling heavy traffic where required, and at the same time us
Question: a) Give the instruction cycle state diagram for a typical Von Neumann machine. b) Give two diagrams to differentiate between a Memory and CPU connections. c) Co
Q. Write a short note on heat sink For transistors handling small signals ,the power dissipated at the collector is small.Such transistors have little chances of thermal runawa
RLC Rotate Accumulator Left Instruction This instruction also rotates the contents of the accumulator towards left by one bit. The D 0 bit moves to D 1 bit moves to D
Q. A 25-kVA, 2400/240-V, 60-Hz, single-phase transformer has an equivalent series impedance of 3.45 + j5.75 referred to the primary high voltage side. The core loss is 120 W. Whe
Q. Explain Integral-error or reset control? A control system is said to possess integral-error control when the generation of the output in some way depends upon the integral o
Example of clamper circuits: Example of clamper circuits are as follow Voltage multiplier circuit: voltage circuit is employed to maintain a relatively low transformer pe
Q. What do you eman by Digital Circuits? The use of nonlinear devices (BJT and FET) in constructing linear amplifiers. Although these devices are inherently nonlinear, their op
Explain the Asynchronous Up-Down Counters? In some applications a counter must be able to count both down and up and the circuit below is a 3-bit up-down counter. It counts do
Q. A practical voltage source is represented by an ideal voltage source of 30 V along with a series internal source resistance of 1.2 . Compute the smallest load resistance that c
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd