The power of the device, that is, the output power of the inverter, can be expressed as: Pout = UL2 / Ron (2)
UL-------- voltage on both sides of the sensor
Ron------- equivalent impedance of resonant circuit
It can be seen from the formula that there are two methods to regulate the output power of equipment, namely, voltage regulation and resistance regulation. Since the parallel resonant tank has the highest impedance during resonance, the power factor of the equipment reaches the maximum, which is what we expect. As a result, the voltage regulation is the optimal method, which can not only maintain the equipment at high power factor, but also adjust the output power of the equipment.
