Capacitance-coupled adjustable power circuit

The invention relates to a capacitance-coupled adjustable power circuit and belongs to the technical field of power sources. The capacitance-coupled adjustable power circuit comprises a main loop and an auxiliary loop which are connected between an alternating-current power source and a load, the main loop comprises a main coupling capacitor and a main rectifying circuit, the auxiliary loop comprises an auxiliary coupling component, an auxiliary rectifying circuit and an adjusting circuit, the main loop and the auxiliary loop are in parallel connection to supply power to the load and perform alternating-current filtration through a filter capacitor, and the auxiliary coupling component can be a capacitor, a resistor, an inductor, a combination of the capacitor, the resistor and the inductor or a short connection wire. The capacitance-coupled adjustable power circuit has the advantages that the power circuit is small in size, high in efficiency, stable to output and capable of avoiding the shortcoming that an