Power transmitter and power receiver for an inductive power system
First Claim
1. A power transmitter for transmitting power inductively to a power receiver via a transmitter coil, the power transmitter comprising:
- a sensing and demodulating unit configured to receive first data and second data from the power receiver via the transmitter coil, said first data indicating a modulation requirement, and said second data including an inquiry message that indicates whether a response message is required from the power transmitter, wherein the second data further indicates a format of the response message or a time requirement for transmitting the response message; and
a modulating and transmitting unit configured to transmit the response message to the power receiver via the transmitter coil when the response message is required according to the second data, said modulating and transmitting unit generating a power signal according to said modulation requirement when transmitting the response message, wherein the response message is modulated on the power signal.
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Accused Products
Abstract
A wireless inductive power transfer system comprises a power transmitter for transmitting power inductively to a power receiver via transmitter coil 11 to receiver coil 21. In the system, a communication method comprises a step 37 of transmitting, by the power receiver, first data and second data to the power transmitter, the first data indicating a modulation requirement, and the second data indicating an inquiry message; a step 32 for receiving, by the power transmitter, the first data and the second data from the power receiver, a step 34 for transmitting, by the power transmitter, a response message for responding to said inquiry message, by modulating a power signal according to said modulation requirement so as to carry the response message; and a step 35 for receiving the response message by the power receiver by demodulating the modulated power signal carrying the response message received via the receiver coil from the power transmitter.
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Citations
16 Claims
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1. A power transmitter for transmitting power inductively to a power receiver via a transmitter coil, the power transmitter comprising:
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a sensing and demodulating unit configured to receive first data and second data from the power receiver via the transmitter coil, said first data indicating a modulation requirement, and said second data including an inquiry message that indicates whether a response message is required from the power transmitter, wherein the second data further indicates a format of the response message or a time requirement for transmitting the response message; and a modulating and transmitting unit configured to transmit the response message to the power receiver via the transmitter coil when the response message is required according to the second data, said modulating and transmitting unit generating a power signal according to said modulation requirement when transmitting the response message, wherein the response message is modulated on the power signal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A power receiver for receiving power inductively from a power transmitter via a receiver coil, the power receiver comprising:
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a modulating and transmitting configured to transmit first data and second data to the power transmitter via the receiver coil, the first data indicating a modulation requirement, and the second data including an inquiry message that indicates whether a response message is required from the power transmitter, wherein the second data further indicates a format of the response message or a time requirement for transmitting the response message; and a sensing and demodulating unit configured to receive the response message from the power transmitter via the receiver coil when the response message is required according to the second data, said sensing and demodulating unit is further configured to demodulate a power signal received by the receiver coil according to the modulation requirement when receiving the response message, the response message being modulated on the power signal by the power transmitter. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method of communicating in an inductive power transfer system, the system comprising a power receiver and a power transmitter, the power receiver comprising a receiver coil, the power transmitter comprising a transmitter coil, the method comprising:
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receiving first data and second data from the power receiver via the transmitter coil, said first data indicating a modulation requirement, and said second data including an inquiry message that indicates whether a response message is required from the power transmitter, wherein the second data further indicates a format of the response message or a time requirement for transmitting the response message; and transmitting the response message, when the response message is required according to the second data, to the power receiver via the transmitter coil by generating a power signal according to the modulation requirement, wherein the response message is modulated on the power signal. - View Dependent Claims (14)
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15. A method of communicating in an inductive power transfer system, the system comprising a power receiver and a power transmitter, the power receiver comprising a receiver coil, the power transmitter comprising a transmitter coil, the method comprising:
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transmitting a first data and a second data to the power transmitter via the receiver coil, the first data indicating a modulation requirement, and the second data including an inquiry message that indicates whether a response message is required from the power transmitter, wherein the second data further indicates a format of the response message or a time requirement for transmitting the response message; and receiving the response message, when the response message is required according to the second data, from the transmitter via the receiver coil by demodulating a power signal received by the receiver coil according to the modulation requirement, wherein the response message is modulated on the power signal. - View Dependent Claims (16)
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Specification