Power receiving device, control method of power receiving device, and power feeding system
A technology for power feeding and receiving equipment, applied in the field of power receiving equipment, can solve the problems of reducing power transmission efficiency, power loss, etc.
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no. 1 example
[0044] [Configuration example of non-contact power feeding system]
[0045] figure 1 is a general view of a configuration example of the power feeding system in the embodiment. The non-contact power feeding system is a system for supplying power to devices in an electrically non-contact state. The contactless power feeding system includes a power feeding device 100 and a power receiving device 200 .
[0046] The power feeding device 100 supplies AC power to the power receiving device 200 through electromagnetic waves. The power feeding device 100 includes a power feeding control section 110 and a power feeding coil 120 .
[0047] The power feeding control section 110 controls the amount of power supplied to the power receiving device 200 . The power feeding control section 110 supplies AC power to the power feeding coil 120 via signal lines 128 and 129 and controls the amount of power. Furthermore, the power feeding control section 110 receives a control signal for contro...
no. 2 example
[0125] [Configuration example of the foreign object detection section]
[0126] Figure 15 is a block diagram showing a configuration example of the foreign object detection section 240 in the second embodiment. The difference between the foreign object detection section 240 in the second embodiment and the foreign object detection section in the first embodiment is that the foreign object detection section 240 in the second embodiment does not obtain the change amount ΔL of the secondary inductance 2 , but only from the change amount Δr of the secondary resistance 2 Check for foreign objects. Specifically, the difference between the foreign object detection part 240 in the second embodiment and the foreign object detection part in the first embodiment is that the foreign object detection part 240 in the second embodiment does not include the secondary inductance change amount obtaining circuit 242 .
[0127] The foreign object detection circuit 243 in the second embodiment...
no. 3 example
[0133] [Configuration example of the foreign object detection section]
[0134] Figure 17 is a block diagram showing a configuration example of the foreign object detection section 240 in the third embodiment. The difference between the foreign object detection section 240 in the third embodiment and that in the first embodiment is that the foreign object detection section 240 in the third embodiment further includes a control amount determination circuit 244 . When there is a foreign object, the control amount determination circuit 244 calculates the control amount ΔW for the fed power amount. On the other hand, when there is no foreign matter, the control amount determination circuit 244 sets the value "0" as the control amount ΔW. The control amount determination circuit 244 outputs the control amount ΔW to the charging control portion 210 as a detection result. Incidentally, the control amount determination circuit 244 is an example of a control amount determination se...
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