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A step down chopper is to be used to supply power from 600 overhead wire to commutator motor on a trolley bus . The motor may be modeled as a generated direct voltage in series with a resistance of .2? and inductance of 25mH. The frequency of the chopper is set at 500 Hz.1-When the bus is stopped , what should be the ON time of the chopper to provide a motor current of 150 A ?2-What is maximum possible generated voltage of the motor for which a current of 150 A can be supplied ?3-What is the average value of the supply current for the conditions of 1 and 2
Assuming that a 12-bit ADC channel accept analog input ranges from 0 to 20 volts, determine the following a) number of quantization levels b) step size of the quantizer or resolution
The problem has two parts(a and b) and it asks: Find the power and rms value of each of the following signals: a) x(t) = 5 + Ccos(ωot+θ) b) x(t) = 2+7cos(1/2t+θ1)+3cos(2/3t+θ2)+5cos(6t+θ3)
When a square wave with a fundamental frequency of 2khz and amplitude 5v and comprised of up to five odd harmonic (each successive odd harmonic having half the amplitude of its predecessor) is passed though a standard telephone line of bandwidth o..
In addition, you have a 32-Kbyte Flash chip, a 16-Kbyte SRAM chip, and a 16 KByte DPRAM chip. You want to locate the FLASH chip right in the beginning of the address space, the SRAM chip just after it, and the DPRAM at the end of the address space..
A 100-watt motor (60% efficient) is used to raise a 100-kilogram load 5 meters into the air. If the task takes 65 seconds to complete, how heavy was the load in units of kilograms
The temperature of water in a 25 gallon water heater is supposed to be raised from 60 deg F to 125 deg F. Compare the cost of using electricity and natural gas to heat the water.
The 16giga-byte (GB=2^30 bytes) flash memory chip for an MP3player is 11mm by 15mm by 1mm. This memory chip holds 20,000photos. a) How many photos fit into a cube whose sides are 1mm
A causal linear time-invariant continuous-time system has impulse response of h(t) when t is greater or equal to 0. compute the output response for all tgreater then or equal to 0 when the input is the unit step function u(t).
Let the random variable X denote the annual snow fall amount at a well known Utah ski resort. X has a normal distribution with mean 500 inches and standard deviation 50 inches. (a) What is the probability that in a given year the snow fall will be ..
Assume that an additional inductance can be inserted in series with the load. also assume that the converter has no freewheeling diodes. Calculate the added inductance that leads to a conduction period of 180 degrees when alpha = 30 degrees.
The maximum strength of the magnetic field in an electromagnetic wave is 3.44E-6 T. What is the maximum strength of the wave's electric field
This would allow the protocol to invalidate a word without logically removing the entire block. What extra complications are introduced into the basic snooping cache coherence protocol if this capability is included
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