Non-contact power supply facility, impedance adjustment method for non-contact power supply facility, and impedance adjustment program for non-contact power supply facility

An impedance adjustment method for a non-contact power supply facility for adjusting a feeder circuit impedance, which is an impedance of a feeder circuit including a feeder line and a power supply device, in a non-contact power supply facility configured to supply electric power to a power receiving device in a non-contact manner, the facility comprising:

• a plurality of feeder lines aligned with a movement path of a mobile body equipped with the power receiving device;
• and
• a plurality of power supply devices connected to the plurality of feeder lines and configured to supply an alternating current to the plurality of feeder lines,
• wherein each power supply device of the plurality of power supply devices comprises:
• a corresponding feeder line of the plurality of feeder lines;
• a power supply circuit configured to output the alternating current to the corresponding feeder line of the plurality of feeder lines;
• a power supply controller configured to control the power supply circuit;
• and
• an adjustment unit configured to adjust a circuit characteristic, which is at least either an inductance or a capacitance of the feeder circuit,
• wherein a target power supply device is a first power supply device of the plurality of power supply devices that is an adjustment target, a target feeder line is a first feeder line of the plurality of feeder lines connected to the target power supply device, an adjacent feeder line is a second feeder line of the plurality of feeder lines adjacent to the target feeder line, an adjacent power supply device is a second power supply device of the plurality of power supply devices connected to the adjacent feeder line, and a regular power supply operation is an operation of the plurality of power supply devices to supply electric power to the mobile body,
• the method comprising:
• a first processing for measuring a first voltage value, which is value of a first voltage on the target feeder line, while the adjacent power supply device is caused to perform the regular power supply operation and the power supply circuit of the target power supply device does not output the alternating current;
• a second processing for measuring a second voltage value, which is a value of a second voltage on the target feeder line, while at least one the adjacent power supply device is caused to perform the regular power supply operation and the power supply circuit of the target power supply device outputs the alternating current;
• and
• an adjustment processing for obtaining, after executing the first processing and the second processing, a feeder circuit reactance, which is a reactance of the feeder circuit of the target power supply device, based on a difference between the first voltage value and the second voltage value, and adjusting the circuit characteristic with use of the adjustment unit in accordance with the feeder circuit reactance obtained, such that the feeder circuit impedance of the feeder circuit of the target power supply device is a predetermined impedance.

An impedance adjustment program product comprising at least one non-transitory computer-readable medium including instructions for, in a non-contact power supply facility, causing a computer to perform functions of adjusting a feeder circuit impedance, which is an impedance of a feeder circuit including a feeder line and a power supply device, in a non-contact power supply facility configured to supply electric power to a power receiving device in a non-contact manner, the facility including:

• a plurality of feeder lines aligned with a movement path of a mobile body equipped with the power receiving device;
• and
• a plurality of power supply devices connected to the plurality of feeder lines and configured to supply an alternating current to the plurality of feeder lines,
• each power supply device of the plurality of power supply devices including:
• a corresponding feeder line of the plurality of feeder lines;
• a power supply circuit configured to output the alternating current to the corresponding feeder line of the plurality of feeder lines;
• a power supply controller configured to control the power supply circuit;
• and
• an adjustment unit configured to adjust a circuit characteristic, which is at least either an inductance or a capacitance of the feeder circuit including Uall the corresponding feeder line of the plurality of feeder lines connected to a power supply device,
• wherein a target power supply device is a first power supply device of the plurality of power supply devices to be an adjustment target, a target feeder line is a first feeder line of the plurality of feeder lines connected to the target power supply device, an adjacent feeder line is a second feeder line of the plurality of feeder lines adjacent to the target feeder line, an adjacent power supply device is a second power supply device of the plurality of power supply devices connected to the adjacent feeder line, and a regular power supply operation is an operation of the plurality of power supply devices to supply electric power to the mobile body,
• the instructions causing the computer to perform:
• a first function of measuring a first voltage value, which is value of a first voltage on the target feeder line, while the adjacent power supply device is caused to perform the regular power supply operation and the power supply circuit of the target power supply device does not output the alternating current;
• a second function of measuring a second voltage value, which is a value of a second voltage on the target feeder line, while the adjacent power supply device is caused to perform the regular power supply operation and the power supply circuit of the target power supply device outputs the alternating current;
• and
• an adjustment function of obtaining, after realizing the first function and the second function, a feeder circuit reactance, which is a reactance of the feeder circuit of the target power supply device, based on a difference between the first voltage value and the second voltage value, and adjusting the circuit characteristic with use of the adjustment unit in accordance with the feeder circuit reactance obtained, such that the feeder circuit impedance of the feeder circuit of the target power supply device is a predetermined impedance.