PWM Control: Duty Cycle and Massager Evidence

Duty cycle describes the proportion of a switching period spent on, while switching frequency describes how often that period repeats. At a twenty-five percent duty cycle, the signal is on for one quarter of each period; at seventy-five percent, it is on for three quarters. These are mathematical illustrations, not product settings. The load and driver determine how the switched signal becomes useful electrical or mechanical output. A motor's inertia, a heater's thermal response and an electrical stimulation circuit can respond differently. Consequently, the same duty percentage does not establish the same perceived intensity across products. The current catalog does not publish a model-specific PWM implementation, switching frequency or duty-cycle range.

PWM does not by itself explain an advertised massage mode count. A mode is a complete operating program and can involve timing, multiple outputs or a sequence of settings. PWM is one possible control technique within an electronic system. Sixteen selectable levels could be produced by different architectures, and the current F20 record does not reveal which is used. The distinction matters when a retailer wants to explain the product simply: the customer needs to understand the documented controls, while an unreported circuit term adds no reliable benefit. A published PWM design would still need its switching conditions and load context before supporting an efficiency or smoothness comparison.