« previous next »

Author Question: Why are almost all large, synchronous generators rotating field generators? What will be an ideal ... (Read 41 times)

krzymel

  • Hero Member
  • *****
  • Posts: 548
on: Jul 26, 2018
Why are almost all large, synchronous generators rotating field generators?
 
  What will be an ideal response?

Question 2

Assume a hydraulic proportional valve receives a 4-20 mA signal to control the hydraulic cylinder that extends or retracts to set the position of the blade pitch between 0 and 80 degrees. What current will set the pitch to 65o?
 
  What will be an ideal response?


ndhahbi

  • Sr. Member
  • ****
  • Posts: 390
Reply #1 on: Jul 26, 2018
Answer to Question 1

Because the there are no slip rings or brushes (or any moving contacts) between the armature and the output terminals as in the case of a rotating armature generator.

Answer to Question 2

The range of 4-20 mA is 16 mA.

16 mA/80 degrees = 0.2 mA/degree + 4 mA offset (0.2 mA x 65 degrees + 4 mA) = 17 mA.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

krzymel

  • Hero Member
  • *****
  • Posts: 548
Reply #2 on: Jul 26, 2018
Both answers were spot on, thank you once again


ndhahbi

  • Sr. Member
  • ****
  • Posts: 390
Reply #3 on: Jul 26, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Medication errors are three times higher among children and infants than with adults.

Did you know?

The effects of organophosphate poisoning are referred to by using the abbreviations “SLUD” or “SLUDGE,” It stands for: salivation, lacrimation, urination, defecation, GI upset, and emesis.

Did you know?

The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.

Did you know?

Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.

Did you know?

In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.

Managing large bands of grazing animals requires detailed knowledge of local landscapes, especially Managing large bands of grazing animals requires detailed knowledge of local landscapes, especially
Visual Field Defects Visual Field Defects
Large Yellow Wood Sorrel Large Yellow Wood Sorrel
Preparation of sterile field 3 Preparation of sterile field 3
Products like Beano contain enzymes that help reduce the production of gas in the large intestine Products like Beano contain enzymes that help reduce the production of gas in the large intestine
Video: Female Reproductive System - Hormonal regulation (GnRH) الجهاز التناسلي للأنثى - التنظيم الهرموني

For a complete list of videos, visit our video library