Design of Synchronous Circuit of Intelligent Soft Starter Based on 80C196MC

The paper introduced hardware design,principle of phase sequence measurement and software realization of synchronous circuit of an intelligent soft starter taking INTEL 80C196MC as control chip.The circuit realized three-phase electric capturing at zero moment by capturing function of single-chip microcomputer,which could realize phase sequence measurement and provide a benchmark moment for wave form generator of 80C196MC programing PWM waves.The actual application showed the circuit ran well.