Position misalignment detection device and electronic apparatus
First Claim
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1. A position misalignment detection device to be applied in a non-contact power supply system, the non-contact power supply system configured to supply an electric power to a receiver from a transmitter with a non-contact power supply transmitter method, the position misalignment detection device comprising:
- a comparator configured to compare with a compound value an electric current induced by a receiving coil in the receiver during the electric power is transmitted from the transmitter with the non-contact power supply transmitter method, and to output a comparison result as a waveform of a comparator output voltage;
a frequency counter connected to the comparator, the frequency counter configured to count a transmit frequency of the electric power transmitted from the transmitter on the basis of a waveform of the comparator output voltage; and
a register configured to store a counted value counted by the frequency counter,whereinthe position misalignment detection device obtains an amount of variation of the transmit frequency of the electric power transmitted from the transmitter as an amount of variation of the transmission power on the basis of the count value stored in the register, and detects that the position misalignment of the receiver mounted on the transmitter occurs during electric charging on the basis of the obtained amount of variation of the transmitted electric power.
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Abstract
The position misalignment detection device includes: a comparator configured to compare an electric current induced by a receiving coil in a receiver (RX) to which an electric power is transmitted from a transmitter (TX) with a non-contact power supply transmitter method; a frequency counter connected to the comparator, the frequency counter configured to count transmit frequency fi transmitted from the transmitter; and a register configured to store a counted value Fi counted by the frequency counter. There is provided the position misalignment detection device which can detect a position misalignment of the receiver on the transmitter during electric charging.
7 Citations
19 Claims
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1. A position misalignment detection device to be applied in a non-contact power supply system, the non-contact power supply system configured to supply an electric power to a receiver from a transmitter with a non-contact power supply transmitter method, the position misalignment detection device comprising:
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a comparator configured to compare with a compound value an electric current induced by a receiving coil in the receiver during the electric power is transmitted from the transmitter with the non-contact power supply transmitter method, and to output a comparison result as a waveform of a comparator output voltage; a frequency counter connected to the comparator, the frequency counter configured to count a transmit frequency of the electric power transmitted from the transmitter on the basis of a waveform of the comparator output voltage; and a register configured to store a counted value counted by the frequency counter, wherein the position misalignment detection device obtains an amount of variation of the transmit frequency of the electric power transmitted from the transmitter as an amount of variation of the transmission power on the basis of the count value stored in the register, and detects that the position misalignment of the receiver mounted on the transmitter occurs during electric charging on the basis of the obtained amount of variation of the transmitted electric power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An electronic apparatus comprising:
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a receiver to which an electric power is transmitted from a transmitter with a non-contact power supply transmitter method; a position misalignment detection device connected to the receiver; and a control unit connected to the receiver and the position misalignment detection device, wherein the position misalignment detection device comprises; a comparator configured to compare with a compound value an electric current induced by a receiving coil in the receiver during the electric power is transmitted from the transmitter with the non-contact power supply transmitter method, and to output a comparison result as a waveform of a comparator output voltage; a frequency counter connected to the comparator, the frequency counter configured to count a transmit frequency of the electric power transmitted from the transmitter on the basis of a waveform of the comparator output voltage; and a register configured to store a counted value counted by the frequency counter, and wherein the position misalignment detection device obtains an amount of variation of the transmit frequency of the electric power transmitted from the transmitter as an amount of variation of the transmission power on the basis of the count value stored in the register, and detects that the position misalignment of the receiver mounted on the transmitter occurs during electric charging on the basis of the obtained amount of variation of the transmitted electric power. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification
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Current AssigneeROHM Co., Ltd.
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Original AssigneeROHM Co., Ltd.
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InventorsHayashida, Hideharu, Iwasaki, Tatsuya, Nozawa, Takeshi, Yasuoka, Kazuyoshi
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Primary Examiner(s)Barnie, Rexford
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Assistant Examiner(s)Tran, Thai
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Application NumberUS15/062,783Publication NumberTime in Patent Office918 DaysField of Search307104, 320108US Class CurrentCPC Class CodesH02J 50/12 of the resonant typeH02J 50/80 involving the exchange of d...H02J 50/90 involving detection or opti...H02J 7/00034 Charger exchanging data wit...
