Power transmission control device, power transmission device, electronic instrument, and non-contact power transmission system
First Claim
1. A power transmission control device provided in a power transmission device of a non-contact power transmission system, the non-contact power transmission system transmitting power from the power transmission device to a power reception device by electromagnetically coupling a primary coil and a secondary coil to transmit the power to a load of the power reception device, the power transmission control device comprising:
- an amplitude detection circuit that detects amplitude information relating to an induced voltage signal of the primary coil;
an A/D conversion circuit that performs A/D conversion of the amplitude information anda control circuit that controls the power transmission device,the A/D conversion circuit performing the A/D conversion of a detected voltage that has been detected by the amplitude detection circuit at a conversion timing and determining digital data relating to a reference threshold voltage, the conversion timing being a timing after a given period has expired from a timing when the detected voltage has exceeded a provisional voltage; and
by using the digital data relating to the reference threshold voltage, the control circuit performing at least one of data detection, foreign object detection, and detachment detection, the data detection detecting data has been transmitted from the power reception device by means of load modulation.
1 Assignment
0 Petitions
Accused Products
Abstract
A power transmission control device provided in a power transmission device of a non-contact power transmission system includes an amplitude detection circuit that detects amplitude information that relates to an induced voltage signal of a primary coil, an A/D conversion circuit that performs A/D conversion of the amplitude information, and a control circuit. The A/D conversion circuit performs A/D conversion of a detected voltage detected by the amplitude detection circuit at a conversion timing and determines digital data relating to a reference threshold voltage, the conversion timing being a timing after a given period has expired from a timing when the detected voltage has exceeded a provisional voltage. The control circuit performs at least one of data detection that detects data that has been transmitted from a power reception device by means of load modulation, foreign object detection, and detachment detection using the digital data relating to the reference threshold voltage.
-
Citations
19 Claims
-
1. A power transmission control device provided in a power transmission device of a non-contact power transmission system, the non-contact power transmission system transmitting power from the power transmission device to a power reception device by electromagnetically coupling a primary coil and a secondary coil to transmit the power to a load of the power reception device, the power transmission control device comprising:
-
an amplitude detection circuit that detects amplitude information relating to an induced voltage signal of the primary coil; an A/D conversion circuit that performs A/D conversion of the amplitude information and a control circuit that controls the power transmission device, the A/D conversion circuit performing the A/D conversion of a detected voltage that has been detected by the amplitude detection circuit at a conversion timing and determining digital data relating to a reference threshold voltage, the conversion timing being a timing after a given period has expired from a timing when the detected voltage has exceeded a provisional voltage; and by using the digital data relating to the reference threshold voltage, the control circuit performing at least one of data detection, foreign object detection, and detachment detection, the data detection detecting data has been transmitted from the power reception device by means of load modulation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 12, 13)
-
-
9. A power transmission control device provided in a power transmission device of a non-contact power transmission system, the non-contact power transmission system transmitting power from the power transmission device to a power reception device by electromagnetically coupling a primary coil and a secondary coil to transmit the power to a load of the power reception device, the power transmission control device comprising:
-
a pulse width detection circuit that detects pulse width information relating to an induced voltage signal of the primary coil; an amplitude detection circuit that detects amplitude information relating to the induced voltage signal of the primary coil; and a control circuit that controls the power transmission device, the control circuit performing data detection based on the pulse width information that has been detected by the pulse width detection circuit, data to be detected by the data detection has been transmitted from the power reception device by means of load modulation, and performing detachment detection based on the amplitude information that has been detected by the amplitude detection circuit. - View Dependent Claims (10, 11)
-
-
14. A non-contact power transmission system comprising a power transmission device and a power reception device, the non-contact power transmission system transmitting power from the power transmission device to the power reception device by electromagnetically coupling a primary coil and a secondary coil to transmit the power to a load of the power reception device, the power reception device including:
-
a power reception section that converts an induced voltage in the secondary coil into a direct voltage; and a load modulation section that variably changes a load depending on transmission data when the power reception device transmits data to the power transmission device; the power transmission control device including; an amplitude detection circuit that detects amplitude information that relates to an induced voltage signal of the primary coil; an A/D conversion circuit that performs A/D conversion of the amplitude information and a control circuit that controls the power transmission device; the A/D conversion circuit performing the A/D conversion of a detected voltage that has been detected by the amplitude detection circuit at a conversion timing and determining digital data relating to a reference threshold voltage, the conversion timing being a timing after a given period has expired from a timing when the detected voltage has exceeded a provisional voltage; and the control circuit performing at least one of data detection, foreign object detection, and detachment detection using the digital data relating to the reference threshold voltage, the data detection detecting data that has been transmitted from the power reception device by means of load modulation.
-
-
15. A non-contact power transmission system comprising a power transmission device and a power reception device, the non-contact power transmission system transmitting power from the power transmission device to the power reception device by electromagnetically coupling a primary coil and a secondary coil to transmit power to a load of the power reception device,
the power reception device including: -
a power reception section that converts an induced voltage in the secondary coil into a direct voltage; and a load modulation section that variably changes a load depending on transmission data when the power reception device transmits data to the power transmission device; the power transmission control device including; a pulse width detection circuit that detects pulse width information relating to an induced voltage signal of the primary coil; an amplitude detection circuit that detects amplitude information relating to the induced voltage signal of the primary coil; and a control circuit that controls the power transmission device; and the control circuit performing data detection based on the pulse width information that has been detected by the pulse width detection circuit, data to be detected by the data detection has been transmitted from the power reception device by means of load modulation, and performing detachment detection based on the amplitude information that has been detected by the amplitude detection circuit.
-
-
16. A power transmission control device that is provided in a power transmission device that is included in a non-contact power transmission system, the non-contact power transmission system transmitting power from the power transmission device to a power reception device by electromagnetically coupling a primary coil and a secondary coil to transmit the power to a load of the power reception device,
the power transmission control device comprising: -
an amplitude detection circuit that detects amplitude information relating to an induced voltage signal of the primary coil; an A/D conversion circuit that performs A/D conversion of the amplitude information and a control circuit that controls the power transmission device, the A/D conversion circuit performing the A/D conversion of a detected voltage that has been detected by the amplitude detection circuit after a timing when the detected voltage has exceeded a given voltage, and determining a reference threshold voltage that is used to perform detection of data that has been transmitted from the power reception device, foreign object detection, or detection of detachment between the power transmission device and the power reception device; and based on the reference threshold voltage, the control circuit performing at least one of the detection of data that has been transmitted from the power reception device, the foreign object detection, and the detection of detachment between the power transmission device and the power reception device. - View Dependent Claims (17, 18, 19)
-
Specification