This unit operates on the principle of electromagnetic excitation, forming a free vibration system with an experimental spring and mass block. It drives the system to vibrate through electromagnetic force, achieving resonance for testing. Compared to traditional electromagnetic fatigue test machines, this unit employs cutting-edge control and measurement technologies. By measuring the spring's compression, it feeds back to the control system, which utilizes electromagnetic resonance, pulse width modulation, and closed-loop control techniques. After a rapid adjustment during the startup phase, the entire machine quickly enters a stable resonance state according to the set amplitude. It boasts advantages such as quick startup, accurate amplitude, stable process, and wide application range. Consequently, for springs requiring high-frequency fatigue testing, the testing process is highly time and energy-efficient, significantly reducing testing costs.

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