System and method for providing and controlling inductive power charging
First Claim
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1. A method for managing a wireless power transfer from a wireless power transmitter to a wireless power receiver by said power transmitter, said method comprising:
- establishing said wireless power transfer; and
terminating said wireless power transfer,wherein said establishing said wireless power transfer comprises executing a digital ping, comprising;
applying, by said power transmitter, a power signal triggering a momentary activation of a primary inductor;
waiting, by said power transmitter, for a valid response message;
if said valid response message is received within a guard-time then transitioning to a power transfer phase; and
if no said valid response message is received within the guard-time then transitioning to a standby phase, andfurther wherein said terminating said wireless power transfer comprises executing a termination sequence, comprising;
monitoring, by said power transmitter, for an end-of-charge (EOC) signal; and
if no said EOC signal is received then continuing said wireless power transfer; and
if said EOC signal is received then ending said wireless power transfer.
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Abstract
Wireless power transfer between power transmitters and power receivers may be established by a digital ping phase during which the wireless power transmitter applies a power signal and waits for a valid response message from the power receiver. The response message may include an identification code and a checksum byte used by the power transmitter to validate the identification code. When a valid response is received, the power transmitter transitions to a power transfer phase.
13 Citations
15 Claims
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1. A method for managing a wireless power transfer from a wireless power transmitter to a wireless power receiver by said power transmitter, said method comprising:
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establishing said wireless power transfer; and terminating said wireless power transfer, wherein said establishing said wireless power transfer comprises executing a digital ping, comprising; applying, by said power transmitter, a power signal triggering a momentary activation of a primary inductor; waiting, by said power transmitter, for a valid response message; if said valid response message is received within a guard-time then transitioning to a power transfer phase; and if no said valid response message is received within the guard-time then transitioning to a standby phase, and further wherein said terminating said wireless power transfer comprises executing a termination sequence, comprising; monitoring, by said power transmitter, for an end-of-charge (EOC) signal; and if no said EOC signal is received then continuing said wireless power transfer; and if said EOC signal is received then ending said wireless power transfer. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A wireless power transmitter operable to transfer power wirelessly to a wireless power receiver, said wireless power transmitter operable to establish wireless power transfer by executing a digital ping comprising:
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applying a power signal triggering a momentary activation of a primary inductor; waiting for a valid response message; and if said valid response message is received within a guard-time then transitioning to a power transfer phase until an end-of-charge (EOC) signal is received; and if no said valid response message is received within the guard-time then transitioning to a standby phase. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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Specification