Single carrier PWM scheme for cascaded multilevel voltage source inverter

This work proposes a new switching scheme for the cascaded multilevel inverter unlike other schemes the proposed method is bases on the symmetric regular sampling PWM with a single carrier and multiple modulating signals. Non-transcendental trigonometric equations that define the switching instants of the multilevel inverter are derived. This algorithm is implemented in a low-cost fixed-point microcontroller on an experimental five-level cascaded inverter test rig.