Power feeding apparatus and power feeding system
First Claim
1. A power feeding apparatus in a power feeding system, the power feeding system being configured to transmit, in a contactless fashion, electric power from the power feeding apparatus to a power receiving apparatus to which a load is to be coupled, the electric power being transmitted by magnetic coupling, the power feeding apparatus comprising:
- a power feeding resonator;
a power supply configured to output a high-frequency signal to the power feeding resonator;
a communicator configured to receive load information from the power receiving apparatus, the load information including a voltage of the load coupled to the power receiving apparatus; and
a controller configured to perform, on the power supply, a control of the high-frequency signal on a basis of the load information received by the communicator, after starting of the output of the high-frequency signal by the power supply, the controller including a PWM generator to generate a PWM signal to control the high-frequency signal by way of at least one of proportional, integral, or derivative control, the PWM generator storing a gain table correlating a plurality of measured load voltage value ranges with respective feedback gain values serving as proportional, integral, and/or derivative elements, the PWM generator selecting one or more feedback gains for controlling the high-frequency signal based on matching the received load voltage to one of the plurality of measured load voltage value ranges in the gain table.
1 Assignment
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Accused Products
Abstract
Provided is a power feeding apparatus in a power feeding system that is configured to transmit, in a contactless fashion, electric power from the power feeding apparatus to a power receiving apparatus by magnetic coupling. The power feeding apparatus includes a power feeding resonator, a power supply, a communicator, and a controller. The power supply is configured to output a high-frequency signal to the power feeding resonator. The communicator is configured to receive load information from the power receiving apparatus. The load information includes information on at least a voltage between the voltage and a current of a load coupled to the power receiving apparatus. The controller is configured to perform, on the power supply, a control of the high-frequency signal on a basis of the load information received by the communicator, after starting of the output of the high-frequency signal by the power supply.
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Citations
8 Claims
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1. A power feeding apparatus in a power feeding system, the power feeding system being configured to transmit, in a contactless fashion, electric power from the power feeding apparatus to a power receiving apparatus to which a load is to be coupled, the electric power being transmitted by magnetic coupling, the power feeding apparatus comprising:
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a power feeding resonator; a power supply configured to output a high-frequency signal to the power feeding resonator; a communicator configured to receive load information from the power receiving apparatus, the load information including a voltage of the load coupled to the power receiving apparatus; and a controller configured to perform, on the power supply, a control of the high-frequency signal on a basis of the load information received by the communicator, after starting of the output of the high-frequency signal by the power supply, the controller including a PWM generator to generate a PWM signal to control the high-frequency signal by way of at least one of proportional, integral, or derivative control, the PWM generator storing a gain table correlating a plurality of measured load voltage value ranges with respective feedback gain values serving as proportional, integral, and/or derivative elements, the PWM generator selecting one or more feedback gains for controlling the high-frequency signal based on matching the received load voltage to one of the plurality of measured load voltage value ranges in the gain table. - View Dependent Claims (2, 3, 4)
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5. A power feeding apparatus in a power feeding system, the power feeding system being configured to transmit, in a contactless fashion, electric power from the power feeding apparatus to a power receiving apparatus to which a load is to be coupled, the electric power being transmitted by magnetic coupling, the power feeding apparatus comprising:
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a power feeding resonator; a power supply configured to output a high-frequency signal to the power feeding resonator; a communicator configured to receive power-receiving-side information from the power receiving apparatus, the power-receiving-side information including information on a distance and information on a current of the load coupled to the power receiving apparatus, the distance being a distance between the power feeding apparatus and the power receiving apparatus and relating to the magnetic coupling; and a controller configured to perform, on the power supply, a control of the high-frequency signal on a basis of the power-receiving-side information received by the communicator, after starting of the output of the high-frequency signal by the power supply, the controller including a PWM generator to generate a PWM signal to control the high-frequency signal by way of at least one of proportional, integral, or derivative control, the PWM generator storing a gain table correlating a plurality of distance ranges with respective feedback gain values serving as proportional, integral, and/or derivative elements, the PWM generator selecting one or more feedback gains for controlling the high-frequency signal based on matching the received distance between the power feeding apparatus and the power receiving apparatus to one of the plurality of distance ranges in the gain table. - View Dependent Claims (6)
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7. A power feeding system configured to transmit, in a contactless fashion, electric power by magnetic coupling, the power feeding system comprising:
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a power feeding apparatus configured to transmit the electric power; and a power receiving apparatus to which a load is to be coupled, and configured to receive the electric power transmitted from the power feeding apparatus, the power receiving apparatus including a power receiving resonator, a detector configured to perform a detection of a voltage of the load coupled to the power receiving apparatus, and a first communicator configured to transmit a result of the detection performed by the detector to the power feeding apparatus, and the power feeding apparatus including a power feeding resonator, a power supply configured to output a high-frequency signal to the power feeding resonator, a second communicator configured to receive the result of the detection from the first communicator, and a controller configured to perform, on the power supply, a control of the high-frequency signal on a basis of the result of the detection received by the second communicator, after starting of the output of the high-frequency signal by the power supply, the controller including a PWM generator to generate a PWM signal to control the high-frequency signal by way of at least one of proportional, integral, or derivative control, the PWM generator storing a gain table correlating a plurality of measured load voltage value ranges with respective feedback gain values serving as proportional, integral, and/or derivative elements, the PWM generator selecting one or more feedback gains for controlling the high-frequency signal based on matching the received load voltage to one of the plurality of measured load voltage value ranges in the gain table, the controller including a PWM generator to generate a PWM signal to control the high-frequency signal by way of at least one of proportional, integral, or derivative control, the PWM generator storing a gain table correlating a plurality of distance ranges with respective feedback gain values serving as proportional, integral, and/or derivative elements, the PWM generator selecting one or more feedback gains for controlling the high-frequency signal based on matching the measured distance between the power feeding apparatus and the power receiving apparatus to one of the plurality of distance ranges in the gain table.
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8. A power feeding system configured to transmit, in a contactless fashion, electric power by magnetic coupling, the power feeding system comprising:
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a power feeding apparatus configured to transmit the electric power; and a power receiving apparatus to which a load is to be coupled, and configured to receive the electric power transmitted from the power feeding apparatus, the power receiving apparatus including a power receiving resonator, a current detector configured to perform a detection of a current of the load coupled to the power receiving apparatus, and a first communicator configured to transmit a result of the detection performed by the current detector to the power feeding apparatus, and the power feeding apparatus including a power feeding resonator, a power supply configured to output a high-frequency signal to the power feeding resonator, a second communicator configured to receive the result of the detection from the first communicator, a distance measuring device configured to measure a distance that is between the power feeding apparatus and the power receiving apparatus and relates to the magnetic coupling, and a controller configured to perform, on the power supply, a control of the high-frequency signal on a basis of the distance obtained by the distance measuring device and the result of the detection received by the second communicator, after starting of the output of the high-frequency signal by the power supply.
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Specification