How to solve non linear equation?

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muneeb ahmad on 4 Aug 2015

Answered: Sean de Wolski on 4 Aug 2015

How can solve the simultaneous equations to get the angles for selective harmonic elimination in a PWM VSI.

For example, how can I solve these equations

m = (4/pi)*(1-2*cos(a) + 2*cos(b) - 2*cos(c))

0 = (1 - 2*cos(5*a) + 2*cos(5*b) - 2*cos(5*c))

0 = (1 - 2*cos(7*a) + 2*cos(7*b) - 2*cos(7*c))

I need to get the values of angles a, b and c.

Sean de Wolski on 4 Aug 2015

Assuming you know m, this can be solved with fsolve in the Optimization Toolbox

doc fsolve

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