Power Management for Inductive Charging Systems
First Claim
1. An adaptive power control system for an electromagnetic induction power transfer apparatus comprising:
- a wireless signal receiver;
an alternating current power supply having an operating frequency;
a power-transmitting inductor coupled to the power supply; and
a current monitor coupled to the power-transmitting inductor;
wherein;
the current monitor determines a current load of the power-transmitting inductor;
the operating frequency of the power supply is modified in response to the current load; and
the operating frequency of the power supply is modified in response to a signal received from the wireless signal receiver.
1 Assignment
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Accused Products
Abstract
Power management and power transfer systems within the transmit and receive portions of an inductive charging system. An inductive charging system may include an inductive charging station to transmit power and a portable electronic device to receive power. Embodiments may take the form of power transfer systems within an inductive charging station including load-based transmit frequency adjustments. Embodiments may also take the form of power management systems within portable electronic devices which conserve power by disconnecting circuits from ground when those circuits are in an idle state.
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Citations
33 Claims
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1. An adaptive power control system for an electromagnetic induction power transfer apparatus comprising:
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a wireless signal receiver; an alternating current power supply having an operating frequency; a power-transmitting inductor coupled to the power supply; and a current monitor coupled to the power-transmitting inductor; wherein; the current monitor determines a current load of the power-transmitting inductor; the operating frequency of the power supply is modified in response to the current load; and the operating frequency of the power supply is modified in response to a signal received from the wireless signal receiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An adaptive power system for a portable electronic device, comprising:
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a battery; a power-receiving inductor having at least an idle state and a receiving state; a power conversion controller coupled to the power receiving inductor; a charge monitor coupled to the battery and the power conversion controller; and a ground connection controller; wherein; in the idle state, the ground connection controller disconnects the charge monitor from ground; and in the receiving state, the ground connection controller connects the charge monitor to ground. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A method of controlling an inductive charging system within a portable electronic device having a battery, comprising:
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determining whether the portable electronic device is inductively proximate a power transmitter; providing a direct connection to ground of the inductive charging system in response to the determination that the portable electronic device is inductively proximate a power transmitter; and removing a direct connection to ground of the inductive charging system in response to the determination that the portable electronic device is not inductively proximate a power transmitter. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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26. A method of modifying power output of an electromagnetic induction power transfer apparatus comprising:
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determining a current load on a power-transmitting inductor supplied with an alternating current at a frequency; adjusting the frequency in response to the determined current load; receiving a signal of power required; and modifying the adjusted frequency in response to the received signal. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33)
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Specification