5.为什么激振器有多个出力额定值?

模态激振器相关问题

Shakers actually only have one maximum force rating. However, shaker systems (i.e. the electrodynamic exciter paired with a specific power amplifier with accessories like a cooling package) have different system ratings. For example, the 2100E11 modal shaker has a maximum force rating of 100 lb pk. To attain this maximum force rating, the shaker must be driven by an amplifier with adequate power, for example, the 2100E18 power amplifier, which is rated at 1000 W. Additionally, to attain this maximum force rating without damaging the shaker, forced air cooling must be supplied to the shaker to dissipate the heat generated from the current flowing through the coils using, for example, the 2050E03 cooling package.

激振器实际上仅仅有一个最大的额定出力。但是,激振器系统(也就是电动激振器,专用功放,以及类似于冷却系统的附件)具有不同的系统额定值。例如,2100E11模态激振器具有100lb pk的最大额定出力。为了得到这个最大的额度出力,必须用一个足够大功率的放大器驱动激振器,例如,2100E18功放,其功率是1000W。另外,为了在不损坏激振器的情况下,得到这个最大的额定出力,必须对激振器提供强制风冷,以散掉流过线圈的电流产生的热量。例如,2050E03冷却系统。

For typical modal applications, lower input force levels are desired. Therefore, the shaker can be used with instrumentation amplifiers such as the 2050E05 or 2100E21-400 power amplifiers delivered with the K2100E11 and K2100E035 systems respectively. The system solution includes certain features of interest to modal test engineers, such as voltage and current monitoring of the amplifier output, safe start, and a safety interlock that can be connected to the 2100E11 mechanical limit switches which prevents over travel of the shaker armature. Given the 400 W nominal power rating of these power amplifiers, the maximum attainable output force level of the system is only specified at 35 lb pk.

对于常规的激振器应用,希望较小的输入激振力量级。那么,激振器可以和仪器放大器,如分别跟K2100E11和K2100E035系统发货的2050E05或者2100E21-400功放一起使用,系统解决方案中包括模态试验工程师感兴趣的某些特性,例如功放输出的电压和电流检测,安全启动,连接到2100E11机械限位开关的安全联锁装置,它能够预防激振器动圈超行程。功放为400W的额度功率时,可以得到的系统最大输出力仅仅限制为35lb pk。