The invention discloses a self-adapting
resonance control method for transmitting non-contact
electric energy, which is characterized by obtaining a
phase difference by detecting and calculating the
voltage and current outputted by a non-contact
electric energy transmitting
system contravariant mechanism, and adjusting the driving frequency of the
inverter by outputting the
electric energy to a PI adjustor and an oscillating element. After a
transient state process, the
phase difference of the
voltage and current outputted by the
inverter is zero, thus achieving self-adapting
resonance control of circuits. The method guarantees separability between the receiving mechanism and the transmitting mechanism of the
system only by detecting the
voltage and current outputted by the contravariant mechanism, with the self-adapting
resonance control function completely achieved by
hardware circuits, while complicated
control algorithm is not required. The method not only has self-adapting control capability on load change, but also has adjustment actions to the parameter variations of all the components after the output of the contravariant mechanism; besides, the method has the advantages of guaranteeing the
system always works under a resonance condition, ensuring the output power and transmission efficiency reach the maximum value, and promoting the practicability process of the
transmission technology of the non-contact electric energy.