CONTROL APPARATUS, POWER TRANSMISSION APPARATUS, POWER RECEPTION APPARATUS, AND CONTROL METHOD

摘要

According to an embodiment, a control apparatus includes a controller and an estimator. The controller commands a frequency-variable signal source to perform a first frequency sweep on an input signal to a second resonator coupling with the first resonator under the first impedance condition. The frequency-variable signal source generates the input signal. The controller commands the frequency-variable signal source to perform a second frequency sweep on the input signal under the second impedance condition. The estimator detects at least one first specific frequency that provides the input signal with a maximal value or a minimal value during a period when the first frequency sweep is performed. The estimator detects at least one second specific frequency that provides the input signal with a maximal value or a minimal value during a period when the second frequency sweep is performed. The estimator estimates, based on the first specific frequency and the second specific frequency, at least one of a coupling coefficient for coupling between the first resonator and the second resonator, a first resonant frequency of the first resonator, and a second resonant frequency of the second resonator.

主权项

1. A control apparatus comprising:
a controller that sets a first resonator condition under which a variable impedance element connected to a first resonator has a first impedance, commands a frequency-variable signal source to perform a first frequency sweep on an input signal to a second resonator coupling with the first resonator under the first impedance condition, sets a second impedance condition under which the variable impedance element has a second impedance different from the first impedance, and commands the frequency-variable signal source to perform a second frequency sweep on the input signal under the second impedance condition, the frequency-variable signal source generating the input signal; and an estimator that detects at least one first specific frequency that provides the input signal with a maximal value or a minimal value during a period when the first frequency sweep is performed, detects at least one second specific frequency that provides the input signal with a maximal value or a minimal value during a period when the second frequency sweep is performed, and estimates, based on the first specific frequency and the second specific frequency, at least one of a coupling coefficient for coupling between the first resonator and the second resonator, a first resonant frequency of the first resonator, and a second resonant frequency of the second resonator.