Wireless power supply apparatus

A wireless power supply apparatus configured to wirelessly supply power to a power reception apparatus including a secondary coil, the wireless power supply apparatus comprising:

• a power transmission resonant circuit that includes a primary coil capable of being magnetically coupled with the secondary coil and a primary capacitor;
• an alternating-current power supply that supplies alternating-current power at an operating frequency prescribed in advance to the power transmission resonant circuit;
• a switching circuit that switches a state of the power transmission resonant circuit between a resonant state and a non-resonant state;
• a detecting unit that directly or indirectly detects a current value of a current flowing to the primary coil;
• and
• a unit-control unit that controls the switching circuit, wherein
• the unit-control unit
• performs at least either of a first abnormality determination process for determining whether the wireless power supply apparatus is abnormal using a first detection value detected by the detecting unit in the non-resonant state, and a second abnormality determination process for determining whether the wireless power supply apparatus is abnormal using a second detection value detected by the detecting unit in the resonant state,
• in the first abnormality determination process, performs a first determination step of determining whether the first detection value is outside a first reference range prescribed in advance, and performs a first abnormality determination step of determining that the wireless power supply apparatus is abnormal when determined that the first detection value is outside the first reference range at the first determination step, and
• in the second abnormality determination process, performs a second determination step of determining whether the second detection value is outside a second reference range prescribed in advance, and performs a second abnormality determination step of determining that the wireless power supply apparatus is abnormal when determined that the second detection value is outside the second reference range at the second determination step.