CXP-544A KOMS-A2 SMPCONT-A3B 具有软启动器的斜坡能力
CXP-544A KOMS-A2 SMPCONT-A3B 具有软启动器的斜坡能力
今天的综合驱动包通常结合了几种解决方案，以提供一个可靠和强大的系统。使用旁路内置软启动器的驱动器具有一系列优势。一般来说，软启动器是为要求三相电机可靠有效软启动的客户设计的。
使用软启动的优势包括:
最小化对机械部件的冲击
延长系统的寿命
提高可靠性
减少停机时间
降低成本
较低的浪涌电流对电气元件和结造成的压力较小，进一步延长了系统寿命。软起动装置减少了打滑、啸叫和拉伸，并将皮带寿命延长到传统跨线起动器的2到6倍。减少对传送带和物料搬运设备上的产品的冲击会降低与搬运产品的损坏相关的成本。在泵的应用中，软启动器能够软停止电机，从而减轻通常所说的水锤效应。
采用接触器、软启动器、变频驱动器和旁路配置
接触器、软启动器和驱动器可用于控制电机。
接触器:只需将电机直接跨接在交流线上。连接到交流线路的电机会非常快地加速到全速，并在加速过程中消耗大量电流。
软启动器:用于缓慢提升电机至全速，和/或缓慢降低电机至停止。为了降低电流消耗和系统的机械应变，使用软启动器代替接触器。通过提供平稳的负载加速和减速，软启动器能够减少皮带、齿轮、链条、离合器、轴和轴承的磨损。许多大型泵和风扇需要至少30秒的斜坡时间，以防止对系统造成机械损坏。通常，软启动器在大马力系统中更常见。在负载突然停止可能导致系统或产品损坏的应用中，它们通常至关重要。
可调频率驱动器:具有软启动器的斜坡能力，允许速度变化，并提供更多的灵活性和各种附加功能。
当用于不能承受停机时间的应用中时，封闭式变频驱动器通常包括旁路。旁路配置由三个接触器组成:一个接触器将传动与交流电源断开，另一个将电机与传动断开，最后一个接触器将电机直接连接到交流线路。看见图1对于典型的三接触器旁路配置。
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