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目前电梯驱动装置广泛采用电力电子技术,例如可控硅励磁系统、交流调压调速系统、交流变压变频系统等。这些系统在转变电能形式和传输功率时,会产生非正弦波。一方面,当这些非正弦波通过电源导线以电磁波进行传输时,会形成公用电网的谐波污染。另一方面,目前微机控制系统和微电子技术广泛应用于电梯控制系统,较传统继电器控制系统抗干扰能力更弱。因此,限制电气设备对外部设备的干扰和提高电气设备抵抗外部电磁干扰的能力已经成为电梯一项重要性能指标,是本文所要探析的电梯磁兼容性能。
Currently widely used in elevator drive power electronics technology, such as SCR excitation system, AC voltage regulator system, AC variable frequency inverter system. These systems produce non-sinusoidal waves as they transform the form of energy and transmit power. On the one hand, when these non-sinusoidal waves are transmitted by electromagnetic waves through power leads, harmonic pollution of the utility grid can be formed. On the other hand, computer control system and microelectronic technology are widely used in elevator control system at present, which has weaker anti-interference ability than traditional relay control system. Therefore, to limit the interference of electrical equipment to external equipment and improve the ability of electrical equipment to resist external electromagnetic interference has become an important performance index of the elevator, which is the magnetic compatibility of the elevator to be explored in this paper.