Using multiple boost converters in parallel allows for a smaller voltage ripple. As you can see its only 70mV once settled. With the output voltage maintained at 18.5V driving a 10 ohm load.
A transistor inverter is used to make the 180 degree phase shift of the sqaure wave, to calculate the phase of the driving signal for more boost converters its just 360/n, where n is the number of converters is parallel. A 3 phase boost converter would have all drivers out of phase by 120 degrees, speaking of which does anyone know of simple ways to shift phases by an arbitrary amount?