Data for the magnetization curve of the iron portion of

Data for the magnetization curve of the iron portion of

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.
(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 20A.

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