Power transmitting device, non-contact power transmitting system, and signal generating method

A non-contact power transmitting system comprising:

• a power transmitting device configured to transmit power in a non-contact manner;
• and
• a power receiving device configured to receive power from the power transmitting device,
• wherein the power transmitting device includes
• a resonance circuit used in non-contact power transmission,
• a first signal generating unit connected to one end of the resonance circuit, and configured to generate, with the use of a switching system, a first high-frequency signal including one or more harmonic components, and
• a second signal generating unit connected to an other end of the resonance circuit, and configured to generate, with the use of a switching system, a second high-frequency signal including a specific harmonic component, and
• wherein the first high-frequency signal is adjusted in pulse width and input to the one end of the resonance circuit, and the second high-frequency signal is adjusted in pulse width and phase difference from the first high-frequency signal and input to the other end of the resonance circuit.

A signal generating method comprising:

• causing a first signal generating unit to generate, with the use of a switching system, a first high-frequency signal including one or more harmonic components and adjusted in pulse width;
• causing a second signal generating unit to generate, with the use of a switching system, a second high-frequency signal including a specific harmonic component and adjusted in pulse width and phase difference from the first high-frequency signal;
• and
• differentially driving the first high-frequency signal and the second high-frequency signal, to thereby generate a composite signal thereof.