Application of multi-dimensional feedback quantized modulation to inverter-fed two cascaded electrodynamic shakers

In this paper, two cascaded electrodynamic shakers are supplied by the three-leg inverter. The conventional comparator-based pulse width modulation (PWM) has limited output voltage region due to the common leg. To enlarge the output voltage region and improve the inverter efficiency, the novel multi-dimensional feedback quantized modulation (MDFQM) is used. All the control algorithms are implemented in FPGA, and the results are provided to verify the proposed method. The results of the conventional PWM method are also provided for comparison.