【摘要】 提出了一种恒流起动与保持的交流接触器方案，采用带有恒流元件的单片机控制线路，使交流接触器定相吸合，从而保证交流接触器在不同电源电压下起动电流波形基本相同，动态过程基本稳定。并且保证吸持阶段可靠、节能运行。该方案不仅提高了性能指标而且简化了设计，是一种性价比较高的方案。更多还原

【Abstract】 The author deals with a method of starting and maintaining the constant current AC contactor,which is epuipped with an single chip microcomputer control circuit.By closing AC contactor at a steady phase angle ,it can be ensured that AC contactor have similar starting current waves under different voltages.A steady dynhamic process and a reliable saving service during maintaining.It is such a good method with high ratio of performance to price that AC contactor’s property targets are improved and its design is simplified.更多还原