Switching Power Supply Control Using Virtual Capacitance Damping

The patent introduces a virtual parallel element (virtual capacitor) as an intermediary component in the control system. This virtual element does not physically exist in the circuit but is implemented through control calculations that simulate its effect. The virtual capacitor provides virtual reactive power compensation, enhancing damping capacity without requiring additional physical components, thus resolving the contradiction between using small components and maintaining stability.

The patent creates a virtual copy of a capacitor through control algorithms. Instead of physically adding a capacitor to provide damping, the system calculates and applies control signals that replicate the damping effect of a virtual capacitor. This copying approach allows the system to achieve the stabilizing effect of larger components while using smaller physical components.

The control device introduces a virtual parallel element as an intermediary that compensates for the insufficient damping capacity of the small physical condenser. The virtual element is calculated based on output voltage and used to generate control signals that provide the necessary damping effect, allowing the use of smaller physical components while maintaining stability.

The patent changes the effective parameters of the smoothing circuit by adding virtual capacitance through control calculations. This parameter change allows the system to achieve the damping characteristics of a larger capacitor while using a smaller physical condenser, effectively decoupling the physical size from the functional damping capacity.