« previous next »

Author Question: Why are almost all large, synchronous generators rotating field generators? What will be an ideal ... (Read 90 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?

Carbamazepine can interfere with the results of home pregnancy tests. If you are taking carbamazepine, do not try to test for pregnancy at home.

Did you know?

Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.

Did you know?

The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.

Did you know?

The oldest recorded age was 122. Madame Jeanne Calment was born in France in 1875 and died in 1997. She was a vegetarian and loved olive oil, port wine, and chocolate.

Did you know?

It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

Large Tortoiseshell Large Tortoiseshell
Glioma. (a) Illustration of a large glioma (colored area) within the left cerebral hemisphere in a s Glioma. (a) Illustration of a large glioma (colored area) within the left cerebral hemisphere in a s
The magnetic field of Uranus as observed by Voyager 2 in 1986. S and N are magnetic south and north The magnetic field of Uranus as observed by Voyager 2 in 1986. S and N are magnetic south and north
Large Mouse-Ear Hawkweed Large Mouse-Ear Hawkweed
Sterile field instructions Sterile field instructions
Rotating a matrix along the x-axis multiplication Rotating a matrix along the x-axis multiplication
Video: Summation - defined, spatial, temporal & AP generation or not

For a complete list of videos, visit our video library