I modeled a motor with broken rotor bars and following is the frequency spectrum of current data.

here f=supply frequency and s=slip of the motor

The appearance of sidebands around the supply frequency are fine.

Here it can be seen that amplitude of (1-2s)f < (1+2s)f

However, in literature, it has been said that amplitude of (1-2s)f > (1+2s)f.

Why is that Maxwell showing opposite results?

Can anyone please comment on this!