Switch Device Control Circuit for Relay Power Reduction

The patent applies dynamics by transitioning the relay control from a static fixed current approach to a dynamic two-stage current control. The control circuit automatically adjusts the current magnitude based on the relay's operational state: providing a first current (larger magnitude) during the turn-on phase to ensure reliable activation, and switching to a second current (smaller magnitude) during the maintained on-state to reduce power consumption. This dynamic adaptation resolves the contradiction between ensuring reliable turn-on and minimizing ongoing power consumption.

The patent implements parameter changes by varying the current magnitude parameter throughout the relay's operational cycle. The control circuit changes the current parameter from a fixed large value to a variable scheme where the first current has a larger magnitude for turn-on, and the second current has a smaller magnitude for maintenance. This parameter transformation allows the system to achieve both reliable activation and reduced power consumption during the maintained state.

The patent applies preliminary action by providing a first current with larger magnitude before switching to the second current with smaller magnitude. This preliminary large current ensures the relay is fully and reliably activated before the system transitions to the power-saving mode. The preliminary action of using sufficient current to guarantee reliable turn-on occurs first, and only after successful activation does the system switch to the smaller maintenance current, thus resolving the contradiction between reliable turn-on and power consumption reduction.

The control circuit dynamically adjusts the current magnitude based on the relay's activation status. During the turn-on phase, the system automatically provides a larger first current to ensure reliable activation. Once the relay is confirmed to be in the on-state, the system dynamically switches to providing a smaller second current for maintenance. This dynamic current adjustment strategy ensures both reliable turn-on and reduced power consumption during the maintained state.

The patent changes the current parameter from a fixed continuous large current to a variable current scheme. The control circuit provides a first current with larger magnitude during turn-on to ensure stable activation, then switches to a second current with smaller magnitude for maintaining the on-state. This parameter change allows the relay to remain reliably in the on-state while significantly reducing energy waste during the maintenance phase, as the smaller second current is sufficient to maintain the closed contact state without requiring continuous large current.

The control circuit implements dynamic current control by automatically adjusting the current magnitude based on the relay's operational phase. During the turn-on phase, a larger first current is provided to ensure stable activation. Once the relay is confirmed to be in the on-state, the system dynamically transitions to providing a smaller second current for maintenance. This dynamic adaptation ensures the relay remains reliably in the on-state while minimizing energy waste during the maintained period.