Contactless Power Transfer Control for Coil Coupling Changes

The control device performs preliminary action by gradually increasing supply electric power from a lower level before reaching the target power level. This ramp-up approach prevents sudden load changes that would cause frequency decrease and instability, while still achieving efficient power transmission eventually.

The system dynamically adjusts supply electric power based on the coupling degree between coils and time elapsed. The control device continuously modifies power levels rather than maintaining fixed levels, enabling smooth transitions that maintain system stability while optimizing transmission efficiency.

The control device applies preliminary action by progressively increasing supply electric power through intermediate levels rather than immediate full power. This gradual ramp-up prevents overcurrent conditions that would trigger protective stoppages, ensuring continuous power supply while maintaining reasonable transmission speed.

The control device provides beforehand cushioning by limiting the rate of power increase and using intermediate power levels as buffer zones. This cushioning effect prevents sudden current spikes that would cause overcurrent detection and power supply stoppage.

The control device dynamically adjusts supply electric power based on real-time coupling degree measurements. When coupling degree decreases below threshold levels, the device reduces or stops power transmission, preventing unnecessary energy loss while maintaining supply continuity when coupling is adequate.

The control device uses feedback from coupling degree measurements to continuously optimize power transmission levels. This feedback mechanism ensures power is transmitted at appropriate levels matched to actual coupling conditions, minimizing energy loss during long-duration transmission while maintaining supply continuity.