When taking the supply inventory, Kelsey counts the boxes of…
When taking the supply inventory, Kelsey counts the boxes of small gloves and finds 10 boxes of gloves. Each box contains 50 gloves. The inventory card identifies the reorder point of this size gloves as 10 boxes, and the quantity to order as 50 boxes. What should Kelsey do?
Read DetailsA new part manufacturing machine can be purchased by Company…
A new part manufacturing machine can be purchased by Company Z for $[a] right now. The machine will have a life of 10 years and no salvage value. Each part that is made in this machine costs Company Z $1.00. As an alternative, Company Z can sub-contract this part manufacturing to Company A for $[b].00 per part. If the interest rate is 0% per year, Company Z would have to test at least _______________ items each year in order for the machine purchase to be preferred over the subcontracting alternative. This copywritten question is part of an exam or quiz at Arizona State Univerisity. It may not be posted or reproduced without permission from Dr. D. McCarville, Dr. L. Chattin, and Arizona State University Enter your answer to the nearest integer.
Read DetailsProblem 4: (a) (13 points) Consider a 2-pole PMSM wind gene…
Problem 4: (a) (13 points) Consider a 2-pole PMSM wind generator system delivering 2 MW with a rotor speed of 3000 RPM. Its parameters are . The d axis is aligned with the rotor position, which is given to be -900 at t = 0. The flux linkage in the d-axis winding due to the rotor magnets, . Assume kE = 1. Draw the per-phase equivalent circuit and calculate the phase ‘a’ current. (b) (12 points) Briefly explain (a short paragraph or a few bullet points) each of the following. (1) Volt-VAR control and (2) Super-synchronous mode of operation in DFIG
Read DetailsProblem 1: (25 points) (a) Consider a three-phase, two-level…
Problem 1: (25 points) (a) Consider a three-phase, two-level converter with dc link voltage of 1000 V. The CCA value of the line-line voltage generated by the converter is 480 V RMS at 60 Hz. The switching frequency is 20 kHz. Using space vector PWM, plot the instantaneous for one switching period around t = 8 ms. Clearly indicate the CCA value of each quantity also at 8 ms. (b) What is the maximum RMS line-line voltage that can be generated from the given 1000V dc link voltage using space vector PWM?
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