modulation coefficient การใช้

• Based on the investigation with several voltage control methods , such as venturini method , instantaneous double - voltage synthesis method and space vector modulation method ( svm ) , three new control strategies are put forward . firstly , a time - varying modulation coefficient svm method is proposed to improve mc ' s anti - disturbance performance under the asymmetry input voltage . secondly , a 5 - state switching strategy is presented for mc controlled by the svm method , which reduces the commutation number and switching losses remarkably