Electric Motor Control
10th Edition
ISBN: 9781305177611
Author: Herman
Publisher: Cengage
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Chapter 42, Problem 11SQ
To determine
Explain how DC is obtained from a brushless rotor.
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What is the minimum value of capacitor C1 required such that Vfiltered does not drop below 8 V? Use the design equation(but make sure you use the right “frequency” and the correct ripple voltage). Show your calculations. Display your circuit in circuit js.
Display Vsecondary (can use the voltage across the added 100 kΩ resistor) and Vfiltered in a “Combined Scope”. Display VDC in a separate scope: a) Turn on “Max Scale”, “Show Peak Value” and “Show Negative Peak Value”: b) Run the simulator and adjust the window and simulation speed and time step to be able to see a couple of cycles. Include a screen capture
Document the minimum and maximum values for Vfiltered in your lab report. Is Vfiltered maintained to be above 8 V? By how much? Why? Explain the waveform shape captured Vfiltered. It may help your understanding to rerun the simulation with C1 removed and compare that waveform for Vfiltered to that captured
Chapter 42 Solutions
Electric Motor Control
Ch. 42 - What are the two basic methods of automatically...Ch. 42 - What is an out-of-step relay?Ch. 42 - Why is an out-of-step relay used on automatic...Ch. 42 - Under what conditions will the out-of-step relay...Ch. 42 - What is the last control contact that closes on a...Ch. 42 - What influence do both of the polarized field...Ch. 42 - Prob. 7SQCh. 42 - Approximately how much time (in terms of...Ch. 42 - How does the AC coil of the PFR receive the...Ch. 42 - Why is a control relay (CR1) used in Figure 426?...
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- A 2000 kVA,Y- connected alternator gives an open circuit line voltage of 3.3 kV for a field current of 65 A. For same field current the short circuit current is being equal to full load current. Calculate the full load voltage regulation at both 0.8 lagging p.f. and unity p.f., neglect armature resistance?arrow_forwardDon't use ai to answer I will report you answerarrow_forwardDon't use ai to answer I will report you answerarrow_forward
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