Electrical
Relationships of DC line voltage, three-phase 6-step wave output, SPWM output and SVPWM output.
Relationships of DC line voltage, three-phase 6-step wave output, SPWM output and SVPWM output. Assuming `$$V_\mathrm{dc}$$` is DC voltage.
Motor
The modulation index of pulse width modulation (PWM)
For the three-phase PWM inverter, there are three commonly used coefficients to indicate the DC voltage utilization level, i.e. Modulation Level (调制度) M = \cfrac{V_R}{V_T} where V_R is the magnitude (note, not fundamental amplitude) of modulation wave, V_T is the magnitude of carrier wave. When M \leq 1, there is Read more…