Current Source Timing Relay for Piezo Actuator Thermal Protection

The patent applies periodic action by using a timing relay to create time-based control cycles. The timing relay periodically switches the connection between the reference resistor and regulator unit, creating alternating phases of high current discharge and reduced current. This periodic switching allows the system to deliver high discharge performance when needed while providing thermal relief periods that prevent cumulative thermal damage to the switching element.

The patent implements dynamics by making the current limitation adaptive rather than static. The timing relay dynamically adjusts the regulator unit's control signal based on elapsed time, allowing high current output capability when thermal conditions permit while automatically reducing current when thermal accumulation becomes dangerous. This dynamic control maintains both discharge capability and thermal protection without requiring a fixed compromise.

The patent uses an intermediary approach by introducing the timing relay as a mediating component between the simple switching element and the regulator unit. The timing relay acts as an intelligent intermediary that automatically monitors time elapsed and selectively activates the regulator unit only when appropriate, translating simple time-based logic into complex thermal protection behavior without requiring direct complex control circuitry.

The patent applies preliminary anti-action by using the timing relay to anticipate and prevent thermal stress accumulation before it becomes dangerous. The timing relay continuously monitors the duration of regulator unit activation and automatically interrupts or reduces control signals when the elapsed time approaches dangerous thresholds. This preliminary protective action prevents prolonged thermal stress while maintaining precise current control during safe operating windows.