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A 6-pole, dc armature with 36 slot and 2 coilsides per slot is to be wave-wound (doublelayer). Calculated the back-pitch, front-pitch and commutator-pitch. How many dummy coils, if any, are required? Draw the developed diagram of the winding and show the locations of brushes and the distance between them in terms of commutator segments. If
(a) 2 brushes are used, and
(b) 6 brushes are used.
Sketch the DFT(discrete fourier transform)for a square wave with frequency 1Hz and 10 Hz given N=64 and SR(sample rate)=128. Make sure to label your axes.
What is a Look-up table? Which addressing mode is used for accessing Look-up tables in 8051?
Determine the maximum and minimum values of the magnitude response. How many peaks occur in the magnitude response in the frequencyrange from zero to 2π What are the locations of the peak and dips
The schematic shows a scheme for coupling and amplifying ahigh-frequency pulse signal. The circuit utilizes twon-channel MOFETs whose bias details are not shown and a 50 ohmcoaxial cable connecting the drain of Q1 to the source of Q2.
The nameplate on a 460-V 50 hp 60 Hz four pole motor indicatesthat the speed at rated load is 1760 r/min. assume the motor to beat operating load. a) What is the slip of the rotor b)what is the frequency of the rotor currents
The 12 Volt automobile battery in the figure has an output capacity of 270 ampere-hours (Ah) when connected to a head lamp that absorbs 65 watts of power. How many hours can the battery power the headlight
A crystal with a simple cubic lattice and a monoatomic basis has an atomic radius of 2.5 angstrom and an atomic weight of 5.42. Calculate its density assuming that the atoms touch each other.
The program will store these values into an array and call a function that will return the average of the temperatures. It will also call a function that will return the highest temperature and a function that will return the lowest temperature.
A 50 Hz, 440 V, 3-phase , 4-pole induction motor develops half the rated torque at 1490 r.p.m. with the applied voltage magnitude remaining at the rated value, what should be its frequency if the motor has to develop the same torque at 1550 r.p.m.
attend a surplus electronics auction and buy a fancy spot light for the car. when you get home you realized why nobody else bid on the light as it contains a 45-watt, 9 volt bulb and your car ( like most ) has a 12-volt electrical system.
Describe the current flow rule in a series circuit. Draw out series circuit and solve for values. The know values are total current is .15 amps, resistor 1 uses 20 watts of power, and resistor 2 uses 12 watts of power
What are the copper losses and core losses in this transformer under the conditions of part (c)?
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