SMPS Controller Sampling Winding Voltage at Secondary Stroke End

The patent applies dynamics by making the sampling timing adaptive rather than fixed. The controller dynamically adjusts the sampling moment based on real-time detection of the secondary stroke end, ensuring optimal sampling timing under varying operating conditions. This dynamic approach resolves the contradiction by automatically adapting to different scenarios without requiring complex manual timing control.

The patent uses feedback by detecting the end of the secondary stroke and using this information to trigger voltage sampling. The system continuously monitors the secondary stroke status and feeds this information back to the sampling controller, which then determines the precise sampling moment. This feedback mechanism ensures high measurement precision while keeping the control logic relatively simple.

The patent applies preliminary action by detecting the end of the secondary stroke in advance and preparing the sampling circuit accordingly. The system anticipates the optimal sampling moment by monitoring secondary stroke parameters and triggers sampling at the precise moment when the voltage difference is minimized. This preliminary detection and preparation reduces timing errors and improves sampling accuracy.

The patent replaces mechanical timing methods with electronic detection and control. Instead of using fixed mechanical timers or manual timing adjustments, the system uses electronic sensors to detect the secondary stroke end and electronic controllers to trigger sampling at the optimal moment. This substitution improves timing accuracy and reduces sampling errors.

The patent extracts the essential function of mains isolation from the opto-coupler and implements it through alternative means. Instead of using an opto-coupler, the system achieves isolation through other electronic isolation techniques that consume less power. This extraction of the isolation function allows the system to maintain reliability while eliminating the high power consumption associated with opto-couplers.

The patent replaces the expensive and power-consuming opto-coupler with a more economical and energy-efficient isolation solution. The alternative isolation mechanism used in the patent consumes significantly less power while maintaining the required mains isolation performance. This substitution is particularly beneficial in low-power applications where every milliwatt counts.