Wireless power feeding unit, power transmitting module, power receiving module, and wireless power transmission system

A wireless power feeding unit comprising:

• a power transmitting module;
• and
• a power receiving module,
• the power transmitting module including
• a first transmission coil which is connected to a first inverter circuit configured to convert supplied electric power into first AC power and output the first AC power, and which is configured to send out the first AC power,
• a second transmission coil which is connected to a second inverter circuit configured to convert supplied electric power into second AC power and output the second AC power, and which is configured to send out the second AC power,
• and
• the power receiving module including
• a first reception coil which is opposed to the first transmission coil, and which receives at least a portion of the first AC power, and
• a second reception coil which is opposed to the second transmission coil, and which receives at least a portion of the second AC power, wherein,
• at least a portion of the AC power received by the first reception coil is supplied to a first load;
• at least a portion of the AC power received by the second reception coil is supplied to a second load;
• one of the first and second transmission coils is inside another of the first and second transmission coils;
• one of the first and second reception coils is inside another of the first and second reception coils;
• each of the two coils in at least one of the power transmission power module and the power receiving module is covered by a piece of magnetic substance, an interspace existing between the pieces of magnetic substance covering the two coils.