Development of Excitation System of Synchronous Motor Controlled by Single-chip Microcomputer

On the basis of analysis of principle of power factor of synchronous motor, a scheme of improving power factor of power network was put forward which took aim at control of constant power factor. An excitation device of synchronous motor for regulating excitation current was designed. The software and hardware design of excitation control system based on W77E85 single-chip microcomputer was discussed in details. The experiment showed that the system is feasible and effective.