| 摘要 |
An inverter for inductive power transfer comprises a first inductor L1 and a switching element Q1 in series between power supply terminals. The switching element is switched at a first frequency. A first capacitance C1 is in parallel with the switching element between the first inductor and a power supply terminal. A first tank circuit 1011 in parallel with the first capacitance comprises a second inductor L2 and a second capacitance C2 in series. A second tank circuit 1012 is in parallel with the first capacitance and a third capacitance C3 is in series with the first inductor between the first tank circuit and the second tank circuit. The second tank circuit comprises a transmitter coil L3, RL, 1013 and a fourth capacitance C4 in parallel or series with the transmitter coil. The fourth capacitance is selected such that the resonant frequency of the second tank circuit is not equal to the first frequency, and the second inductor and the second capacitance are selected such that the resonant frequency of the first tank circuit is an integer multiple, greater than one, of the first frequency. |
