高壓三相異步電動機脈寬調壓調速控制系統用于接入三相異步電動機的供電電路而實現對三相異步電動機的調速控制。其特征在于，包括調速控制電路和脈寬調制觸發電路；其中，調速控制電路的輸出端連接三相異步電動機的供電電路，并通過控制該供電電路的導通或關斷而改變三相異步電動機的工作電壓；脈寬調制觸發電路的輸出端與調速控制電路連接，并向調速控制電路發出該調速控制電路控制供電電路導通或關斷時所需的觸發信號。
 高(gao)壓(ya)三相異步電(dian)(dian)(dian)動機脈寬調(diao)壓(ya)調(diao)速(su)控(kong)制(zhi)系統(tong)設計合理，該系統(tong)中的調(diao)速(su)控(kong)制(zhi)電(dian)(dian)(dian)路控(kong)制(zhi)供電(dian)(dian)(dian)電(dian)(dian)(dian)路導(dao)通或關斷(duan)時(shi)所需的觸(chu)發信號由脈寬調(diao)制(zhi)觸(chu)發電(dian)(dian)(dian)路產生，通過調(diao)速(su)控(kong)制(zhi)電(dian)(dian)(dian)路來控(kong)制(zhi)三相異步電(dian)(dian)(dian)動機的供電(dian)(dian)(dian)電(dian)(dian)(dian)路的導(dao)通或關斷(duan)，進而達到(dao)調(diao)壓(ya)調(diao)速(su)控(kong)制(zhi)的目的，具有較好的動態(tai)和(he)靜態(tai)性能。