Data for the magnetization curve of the iron portion of the magnetic circuit of the plunger actuator
Question:
Data for the magnetization curve of the iron portion of the magnetic circuit of the plunger actuator of Problem 3.12 are given below:
a. Use the MATLAB poly fit function to obtain a 3'rd-order fit of reluctance and total flux versus mmf for the iron portions of the magnetic circuit.
Your fits will be of the form: List the coefficients.
b. (i) Using MATLAB and the functional forms found in part (a), plot the magnetization curve for the complete magnetic circuit (flux linkages ? versus winding current i) for a variable-gap length of g = 0.2 cm. On the same axes, plot the magnetization curve corresponding to the assumption that the iron is of infinite permeability. The maximum current in your plot should correspond to a flux in the magnetic circuit of 600mWb.
(ii) Calculate the magnetic field energy and co-energy for each of these cases corresponding to a winding current of 2.0 A.
c. Repeat part (b) for a variable-gap length of g = 2.25 cm. In part (ii), calculate the magnetic field energy and co-energy corresponding to a winding current of 20 A.
Step by Step Answer:
part a a 913071 x 105 a2 0124209 a3 281089 a 105582 ...View the full answer
