If the voltage (Vdc) per CHB is very low vs 240 Volts AC Line then we will need many CHB's. 40 CHB's required = 240 Volts AC / 6 volt Vdc. But what if you used only 4 CHB's at 4 different voltages? Voltages = 6 Volts, 18 Volts, 54 Volts & 162 Volts = Factor x 3! Now, you can create 81 different voltage steps from +240 volts, through 0 volts, down to -240 volts at EVERY 6 volt interval. Only 4 different modules need to be mass produced? What is the %THD, just by implementing the 81 steps without any high speed PWM?
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If the voltage (Vdc) per CHB is very low vs 240 Volts AC Line then we will need many CHB's. 40 CHB's required = 240 Volts AC / 6 volt Vdc. But what if you used only 4 CHB's at 4 different voltages? Voltages = 6 Volts, 18 Volts, 54 Volts & 162 Volts = Factor x 3! Now, you can create 81 different voltage steps from +240 volts, through 0 volts, down to -240 volts at EVERY 6 volt interval. Only 4 different modules need to be mass produced? What is the %THD, just by implementing the 81 steps without any high speed PWM?