Power supply device, power receiving device and vehicle including power receiving device, and control method for power supply system
First Claim
1. A power supply device that supplies electric power to a power receiving device including a power receiving unit in a non-contact manner, the power supply device comprising:
- a power source device that generates electric power with a predetermined frequency;
a power transmitting unit that receives the electric power from the power source device, and that resonates with the power receiving unit through an electromagnetic field, thereby transmitting the electric power to the power receiving unit in the non-contact manner;
a detection device that detects reflected electric power to the power source device;
a communication device that receives a power receiving situation in the power receiving device; and
a control device that controls electric power transmission from the power transmitting unit based on the power receiving situation and the reflected electric power,wherein the control device calculates a power transmission efficiency from the power supply device to the power receiving device, based on received electric power that indicates the power receiving situation, and the electric power output from the power source device,the control device controls the electric power transmission from the power transmitting unit, based on the power transmission efficiency and the reflected electric power andif the power transmission efficiency is lower than a predetermined first threshold value and the reflected electric power is lower than a predetermined second threshold value, the control device stops the electric power transmission from the power transmitting unit.
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Accused Products
Abstract
A power supply device supplies electric power to a power receiving device including a power receiving unit in a non-contact manner. The power supply device includes a power source device that generates electric power with a predetermined frequency; a power transmitting unit that receives the electric power from the power source device, and that resonates with the power receiving unit through an electromagnetic field, thereby transmitting the electric power to the power receiving unit in the non-contact manner; a detection device that detects reflected electric power to the power source device; a communication device that receives information regarding a power receiving situation in the power receiving device; and a control device that controls electric power transmission from the power transmitting unit based on the information regarding the power receiving situation and the reflected electric power.
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Citations
10 Claims
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1. A power supply device that supplies electric power to a power receiving device including a power receiving unit in a non-contact manner, the power supply device comprising:
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a power source device that generates electric power with a predetermined frequency; a power transmitting unit that receives the electric power from the power source device, and that resonates with the power receiving unit through an electromagnetic field, thereby transmitting the electric power to the power receiving unit in the non-contact manner; a detection device that detects reflected electric power to the power source device; a communication device that receives a power receiving situation in the power receiving device; and a control device that controls electric power transmission from the power transmitting unit based on the power receiving situation and the reflected electric power, wherein the control device calculates a power transmission efficiency from the power supply device to the power receiving device, based on received electric power that indicates the power receiving situation, and the electric power output from the power source device, the control device controls the electric power transmission from the power transmitting unit, based on the power transmission efficiency and the reflected electric power and if the power transmission efficiency is lower than a predetermined first threshold value and the reflected electric power is lower than a predetermined second threshold value, the control device stops the electric power transmission from the power transmitting unit. - View Dependent Claims (2, 3, 4, 5)
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6. A control method for a power supply system in which a power transmitting unit in a power supply device resonates with a power receiving unit in a power receiving device through an electromagnetic field to supply electric power from the power supply device to the power receiving device in a non-contact manner, the control method comprising:
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a step of detecting reflected electric power to a power source device in the power supply device; a step of detecting a power receiving situation in the power receiving device; and a step of controlling electric power transmission from the power supply device to the power receiving device based on the power receiving situation and the reflected electric power, wherein the step of controlling the electric power transmission includes; a step of calculating a power transmission efficiency from the power supply device to the power receiving device, based on received electric power that indicates the power receiving situation, and electric power output from the power source device; and a step of controlling electric power transmission from the power transmitting unit based on the power transmission efficiency and the reflected electric power, and the step of controlling the electric power transmission from the power transmitting unit includes; a step of determining whether the power transmission efficiency is lower than a predetermined first threshold value; a step of determining whether the reflected electric power is lower than a predetermined second threshold value, if it is determined that the power transmission efficiency is lower than the first threshold value; and stopping the electric power transmission from the power transmitting unit, if it is determined that the reflected electric power is lower than the second threshold value. - View Dependent Claims (7, 8, 9, 10)
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Specification