In view of problem of harmonic pollution and system loss of active front end of 10 kV high voltage mine hoist. MSHE-PWM harmonic suppression method was proposed. ANPC five-level topology mathematical model was established to analyze MSHE-PWM harmonic suppression principle and solve MSHE-PWM nonlinear equations under constraint conditions. Voltage balance control method of suspended ca... https://macorners.shop/product-category/aluminum-wooden-ornament/