What causes a Run Speed or RPM spike in a Demodulation Spectrum?

A Run Speed or RPM spike in a Demodulation Spectrum is primarily caused by unbalance or misalignment within the system. When components within a mechanical system are not properly aligned or if there is an imbalance, it can result in irregularities in the operation of the motor. These irregularities can lead to fluctuations in speed, which are reflected as spikes in the demodulation spectrum.

In practical terms, misalignment often causes an increase in vibration, which can directly affect the speed of the motor. If the load distribution is uneven due to unbalance, it can lead to a rapid increase in run speed as the motor struggles to compensate for the asymmetrical forces acting upon it.

Proper alignment of components, on the other hand, ensures that the forces within the system are evenly distributed, promoting consistent operation. Overheating can affect motor performance, but it generally leads to degradation over time rather than immediate spikes in performance. As for voltage input, while excessive voltage can create issues in motor performance, it typically causes overheating or electrical issues rather than directly causing speed spikes. Thus, the relationship between unbalance or misalignment and run speed fluctuations is the key factor in understanding this phenomenon.