Power source device

A power source device comprising:

• a capacitive load having an equivalent capacitor and an equivalent resistor;
• and an AC power source which applies AC voltage to the capacitive load, the power source device being such that a series circuit composed of a first inductor and a first capacitor is connected to the AC power source, and a series circuit composed of a load inductor and the capacitive load is connected in parallel to one of the first inductor or the first capacitor, or a parallel circuit composed of the first inductor and the first capacitor is connected to the AC power source, and a parallel circuit composed of the load inductor and the capacitive load is connected in series to one of the first inductor or the first capacitor, wherein the power source device has a configuration wherein an inductance of the first inductor is defined as Lp, a capacitance of the first capacitor is defined as Cp, an inductance of the load inductor is defined as Ls, an equivalent capacitance of the capacitive load is defined as Cs, and a frequency of the AC power source is defined as fv, and the following first expression and second expression are satisfied,
• 0.8/((2π·fv){circumflex over ( )}2)<Lp·Cp<1.2/((2π·fv){circumflex over ( )}2)
• 0.8/(2π·fv){circumflex over ( )}2)<Ls·Cs<1.2/(2π·fv){circumflex over ( )}2).