Patent ID: 8310107
Filing Date: 2012-11-13
Classification: H02J

Abstract:
1. A power transmission control device that controls a power transmitting device of a non-contact power transmission system, the non-contact power transmission system transmitting power from the power transmitting device to a power receiving device via non-contact power transmission through a primary coil and a secondary coil that are electromagnetically coupled, the power transmission control device comprising: a power-transmitting-side control circuit that controls power transmission of the power transmitting device to the power receiving device; and a harmonic detection circuit that detects a harmonic of a drive signal of the primary coil, a resonant circuit being formed when the primary coil and the secondary coil are electromagnetically coupled in a state in which the primary coil and the secondary coil have a given positional relationship, the resonant circuit resonating with the harmonic of the drive signal of the primary coil; the harmonic detection circuit detecting the harmonic of the drive signal of the primary coil that occurs due to resonance of the resonant circuit; and the power-transmitting-side control circuit detecting that the primary coil and the secondary coil have the given positional relationship based on a detection result of the harmonic detection circuit.