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Power Engineering

[17.18] Power electronics

[Power electronics] The measured values of a diode at a temperature of 25 Degrees Celsius are: Vd=1V at Id=50A, Vd=1.5V at Id=600A. Determine (i) the emission coefficient n, and (ii) the leakage current. ============================================== Answers: a. (a) n=6, (b) Is=0.2A b. (i) n=5, (ii) Is=1A c. (i) n=8, (ii)

Ladder Logic Timers

SEE ATTACHMENT: #4 and the Figure Above it. Questions: a.)What type of timer has been programmed? b.)What is the length of the time-delay period? c.)When does the timer start timing? d.)When is the reset? e.)When will rung 3 be true? f.)When will rung 5 be true? g.)When will output PL4 be energized? h.)Assume that

Risk Analysis and Management Fault tolerant systems Nuclear Power Plant Safety

2. A fault-tolerant nuclear reactor protection system consists of 3 processors and 6 memories. The system will fail if (a) any 2 of the 3 processors fail, or (b) any 2 of the 6 memories fail. The nominal failure rates of these processors and memories, provided by the manufacturers, are 1 per 10,000 hours and 1 per 2,000 hours

Battery Charging

In order to charge a battery there must be a potential difference between the charger and the battery,i.e.a charging voltage.As a battery is being charged this potential difference reduces and since the charging current is related to this charging voltage the rate of charging also reduces. A battery is put on charge.The relat

Parameters of a white Gaussian noise process

A white Gaussian noise process X(t) with power spectral density (PSD) N0/2=0.1 is input to an LTI filter with a transfer function H(f) given by H(f) = 2, |f| <= W and 0, otherwise The output is denoted Y(t). (1) Find the autocorrelation function RX(t) of X(t). (2) Find E[Y(t)]. (3) Find the PSD of Y(t). (4) De

Power Electronics

Hi, I need assistance answering the following questions. Please open the attachment to see the problems, they are related to circuits.

Power Electronics and Snuber Circuit

I need help breaking this problem down. We DO NOT use MATLAB or Spice. The JPEG shows the entire problem with the given sets. Can anyone show me the correct set?

Inkjet Printer Power and Rating Problem

An A4 inkjet printer uses ink cartridges with a mass of 250g supported by a carrier having a mass of 150g. The printer head is moved across the page by a motor driving through a toothed belt. It makes a single traverse of the page in 1s, which includes acceleration and deceleration times. The acceleration and deceleration zones

POWER SERIES SOLUTIONS

FIND POWER SERIES SOLUTIONS IN POWERS OF X OF THE D.E. y''-xy'+(3x-2)y=0 and FIND POWER SERIES SOLUTION OF EA. OF THE INITIAL-VALUE. y''+xy'-2y=0, y(0)=0, y'(0)=1 ON BOTH OF THE PROBLEMS I GOT STUCK ON THE RECURRENCE FORMULA AND GETTING POWERS OF X.